--- /dev/null
+FileCheck - Flexible pattern matching file verifier
+===================================================
+
+
+SYNOPSIS
+--------
+
+
+**FileCheck** *match-filename* [*--check-prefix=XXX*] [*--strict-whitespace*]
+
+
+DESCRIPTION
+-----------
+
+
+**FileCheck** reads two files (one from standard input, and one specified on the
+command line) and uses one to verify the other. This behavior is particularly
+useful for the testsuite, which wants to verify that the output of some tool
+(e.g. llc) contains the expected information (for example, a movsd from esp or
+whatever is interesting). This is similar to using grep, but it is optimized
+for matching multiple different inputs in one file in a specific order.
+
+The *match-filename* file specifies the file that contains the patterns to
+match. The file to verify is always read from standard input.
+
+
+OPTIONS
+-------
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**--check-prefix** *prefix*
+
+ FileCheck searches the contents of *match-filename* for patterns to match. By
+ default, these patterns are prefixed with "CHECK:". If you'd like to use a
+ different prefix (e.g. because the same input file is checking multiple
+ different tool or options), the **--check-prefix** argument allows you to specify
+ a specific prefix to match.
+
+
+
+**--strict-whitespace**
+
+ By default, FileCheck canonicalizes input horizontal whitespace (spaces and
+ tabs) which causes it to ignore these differences (a space will match a tab).
+ The --strict-whitespace argument disables this behavior.
+
+
+
+**-version**
+
+ Show the version number of this program.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **FileCheck** verifies that the file matches the expected contents, it exits
+with 0. Otherwise, if not, or if an error occurs, it will exit with a non-zero
+value.
+
+
+TUTORIAL
+--------
+
+
+FileCheck is typically used from LLVM regression tests, being invoked on the RUN
+line of the test. A simple example of using FileCheck from a RUN line looks
+like this:
+
+
+.. code-block:: perl
+
+ ; RUN: llvm-as < %s | llc -march=x86-64 | FileCheck %s
+
+
+This syntax says to pipe the current file ("%s") into llvm-as, pipe that into
+llc, then pipe the output of llc into FileCheck. This means that FileCheck will
+be verifying its standard input (the llc output) against the filename argument
+specified (the original .ll file specified by "%s"). To see how this works,
+let's look at the rest of the .ll file (after the RUN line):
+
+
+.. code-block:: perl
+
+ define void @sub1(i32* %p, i32 %v) {
+ entry:
+ ; CHECK: sub1:
+ ; CHECK: subl
+ %0 = tail call i32 @llvm.atomic.load.sub.i32.p0i32(i32* %p, i32 %v)
+ ret void
+ }
+
+ define void @inc4(i64* %p) {
+ entry:
+ ; CHECK: inc4:
+ ; CHECK: incq
+ %0 = tail call i64 @llvm.atomic.load.add.i64.p0i64(i64* %p, i64 1)
+ ret void
+ }
+
+
+Here you can see some "CHECK:" lines specified in comments. Now you can see
+how the file is piped into llvm-as, then llc, and the machine code output is
+what we are verifying. FileCheck checks the machine code output to verify that
+it matches what the "CHECK:" lines specify.
+
+The syntax of the CHECK: lines is very simple: they are fixed strings that
+must occur in order. FileCheck defaults to ignoring horizontal whitespace
+differences (e.g. a space is allowed to match a tab) but otherwise, the contents
+of the CHECK: line is required to match some thing in the test file exactly.
+
+One nice thing about FileCheck (compared to grep) is that it allows merging
+test cases together into logical groups. For example, because the test above
+is checking for the "sub1:" and "inc4:" labels, it will not match unless there
+is a "subl" in between those labels. If it existed somewhere else in the file,
+that would not count: "grep subl" matches if subl exists anywhere in the
+file.
+
+The FileCheck -check-prefix option
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+The FileCheck -check-prefix option allows multiple test configurations to be
+driven from one .ll file. This is useful in many circumstances, for example,
+testing different architectural variants with llc. Here's a simple example:
+
+
+.. code-block:: perl
+
+ ; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin9 -mattr=sse41 \
+ ; RUN: | FileCheck %s -check-prefix=X32>
+ ; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin9 -mattr=sse41 \
+ ; RUN: | FileCheck %s -check-prefix=X64>
+
+ define <4 x i32> @pinsrd_1(i32 %s, <4 x i32> %tmp) nounwind {
+ %tmp1 = insertelement <4 x i32>; %tmp, i32 %s, i32 1
+ ret <4 x i32> %tmp1
+ ; X32: pinsrd_1:
+ ; X32: pinsrd $1, 4(%esp), %xmm0
+
+ ; X64: pinsrd_1:
+ ; X64: pinsrd $1, %edi, %xmm0
+ }
+
+
+In this case, we're testing that we get the expected code generation with
+both 32-bit and 64-bit code generation.
+
+
+The "CHECK-NEXT:" directive
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+Sometimes you want to match lines and would like to verify that matches
+happen on exactly consecutive lines with no other lines in between them. In
+this case, you can use CHECK: and CHECK-NEXT: directives to specify this. If
+you specified a custom check prefix, just use "<PREFIX>-NEXT:". For
+example, something like this works as you'd expect:
+
+
+.. code-block:: perl
+
+ define void @t2(<2 x double>* %r, <2 x double>* %A, double %B) {
+ %tmp3 = load <2 x double>* %A, align 16
+ %tmp7 = insertelement <2 x double> undef, double %B, i32 0
+ %tmp9 = shufflevector <2 x double> %tmp3,
+ <2 x double> %tmp7,
+ <2 x i32> < i32 0, i32 2 >
+ store <2 x double> %tmp9, <2 x double>* %r, align 16
+ ret void
+
+ ; CHECK: t2:
+ ; CHECK: movl 8(%esp), %eax
+ ; CHECK-NEXT: movapd (%eax), %xmm0
+ ; CHECK-NEXT: movhpd 12(%esp), %xmm0
+ ; CHECK-NEXT: movl 4(%esp), %eax
+ ; CHECK-NEXT: movapd %xmm0, (%eax)
+ ; CHECK-NEXT: ret
+ }
+
+
+CHECK-NEXT: directives reject the input unless there is exactly one newline
+between it an the previous directive. A CHECK-NEXT cannot be the first
+directive in a file.
+
+
+The "CHECK-NOT:" directive
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+The CHECK-NOT: directive is used to verify that a string doesn't occur
+between two matches (or before the first match, or after the last match). For
+example, to verify that a load is removed by a transformation, a test like this
+can be used:
+
+
+.. code-block:: perl
+
+ define i8 @coerce_offset0(i32 %V, i32* %P) {
+ store i32 %V, i32* %P
+
+ %P2 = bitcast i32* %P to i8*
+ %P3 = getelementptr i8* %P2, i32 2
+
+ %A = load i8* %P3
+ ret i8 %A
+ ; CHECK: @coerce_offset0
+ ; CHECK-NOT: load
+ ; CHECK: ret i8
+ }
+
+
+
+FileCheck Pattern Matching Syntax
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+The CHECK: and CHECK-NOT: directives both take a pattern to match. For most
+uses of FileCheck, fixed string matching is perfectly sufficient. For some
+things, a more flexible form of matching is desired. To support this, FileCheck
+allows you to specify regular expressions in matching strings, surrounded by
+double braces: **{{yourregex}}**. Because we want to use fixed string
+matching for a majority of what we do, FileCheck has been designed to support
+mixing and matching fixed string matching with regular expressions. This allows
+you to write things like this:
+
+
+.. code-block:: perl
+
+ ; CHECK: movhpd {{[0-9]+}}(%esp), {{%xmm[0-7]}}
+
+
+In this case, any offset from the ESP register will be allowed, and any xmm
+register will be allowed.
+
+Because regular expressions are enclosed with double braces, they are
+visually distinct, and you don't need to use escape characters within the double
+braces like you would in C. In the rare case that you want to match double
+braces explicitly from the input, you can use something ugly like
+**{{[{][{]}}** as your pattern.
+
+
+FileCheck Variables
+~~~~~~~~~~~~~~~~~~~
+
+
+It is often useful to match a pattern and then verify that it occurs again
+later in the file. For codegen tests, this can be useful to allow any register,
+but verify that that register is used consistently later. To do this, FileCheck
+allows named variables to be defined and substituted into patterns. Here is a
+simple example:
+
+
+.. code-block:: perl
+
+ ; CHECK: test5:
+ ; CHECK: notw [[REGISTER:%[a-z]+]]
+ ; CHECK: andw {{.*}}[REGISTER]]
+
+
+The first check line matches a regex (**%[a-z]+**) and captures it into
+the variable "REGISTER". The second line verifies that whatever is in REGISTER
+occurs later in the file after an "andw". FileCheck variable references are
+always contained in **[[ ]]** pairs, are named, and their names can be
+name, then it is a definition of the variable, if not, it is a use.
+
+FileCheck variables can be defined multiple times, and uses always get the
+latest value. Note that variables are all read at the start of a "CHECK" line
+and are all defined at the end. This means that if you have something like
+"**CHECK: [[XYZ:.\\*]]x[[XYZ]]**", the check line will read the previous
+value of the XYZ variable and define a new one after the match is performed. If
+you need to do something like this you can probably take advantage of the fact
+that FileCheck is not actually line-oriented when it matches, this allows you to
+define two separate CHECK lines that match on the same line.
--- /dev/null
+bugpoint - automatic test case reduction tool
+=============================================
+
+
+SYNOPSIS
+--------
+
+
+**bugpoint** [*options*] [*input LLVM ll/bc files*] [*LLVM passes*] **--args**
+*program arguments*
+
+
+DESCRIPTION
+-----------
+
+
+**bugpoint** narrows down the source of problems in LLVM tools and passes. It
+can be used to debug three types of failures: optimizer crashes, miscompilations
+by optimizers, or bad native code generation (including problems in the static
+and JIT compilers). It aims to reduce large test cases to small, useful ones.
+For more information on the design and inner workings of **bugpoint**, as well as
+advice for using bugpoint, see *llvm/docs/Bugpoint.html* in the LLVM
+distribution.
+
+
+OPTIONS
+-------
+
+
+
+**--additional-so** *library*
+
+ Load the dynamic shared object *library* into the test program whenever it is
+ run. This is useful if you are debugging programs which depend on non-LLVM
+ libraries (such as the X or curses libraries) to run.
+
+
+
+**--append-exit-code**\ =\ *{true,false}*
+
+ Append the test programs exit code to the output file so that a change in exit
+ code is considered a test failure. Defaults to false.
+
+
+
+**--args** *program args*
+
+ Pass all arguments specified after -args to the test program whenever it runs.
+ Note that if any of the *program args* start with a '-', you should use:
+
+
+ .. code-block:: perl
+
+ bugpoint [bugpoint args] --args -- [program args]
+
+
+ The "--" right after the **--args** option tells **bugpoint** to consider any
+ options starting with ``-`` to be part of the **--args** option, not as options to
+ **bugpoint** itself.
+
+
+
+**--tool-args** *tool args*
+
+ Pass all arguments specified after --tool-args to the LLVM tool under test
+ (**llc**, **lli**, etc.) whenever it runs. You should use this option in the
+ following way:
+
+
+ .. code-block:: perl
+
+ bugpoint [bugpoint args] --tool-args -- [tool args]
+
+
+ The "--" right after the **--tool-args** option tells **bugpoint** to consider any
+ options starting with ``-`` to be part of the **--tool-args** option, not as
+ options to **bugpoint** itself. (See **--args**, above.)
+
+
+
+**--safe-tool-args** *tool args*
+
+ Pass all arguments specified after **--safe-tool-args** to the "safe" execution
+ tool.
+
+
+
+**--gcc-tool-args** *gcc tool args*
+
+ Pass all arguments specified after **--gcc-tool-args** to the invocation of
+ **gcc**.
+
+
+
+**--opt-args** *opt args*
+
+ Pass all arguments specified after **--opt-args** to the invocation of **opt**.
+
+
+
+**--disable-{dce,simplifycfg}**
+
+ Do not run the specified passes to clean up and reduce the size of the test
+ program. By default, **bugpoint** uses these passes internally when attempting to
+ reduce test programs. If you're trying to find a bug in one of these passes,
+ **bugpoint** may crash.
+
+
+
+**--enable-valgrind**
+
+ Use valgrind to find faults in the optimization phase. This will allow
+ bugpoint to find otherwise asymptomatic problems caused by memory
+ mis-management.
+
+
+
+**-find-bugs**
+
+ Continually randomize the specified passes and run them on the test program
+ until a bug is found or the user kills **bugpoint**.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**--input** *filename*
+
+ Open *filename* and redirect the standard input of the test program, whenever
+ it runs, to come from that file.
+
+
+
+**--load** *plugin*
+
+ Load the dynamic object *plugin* into **bugpoint** itself. This object should
+ register new optimization passes. Once loaded, the object will add new command
+ line options to enable various optimizations. To see the new complete list of
+ optimizations, use the **-help** and **--load** options together; for example:
+
+
+ .. code-block:: perl
+
+ bugpoint --load myNewPass.so -help
+
+
+
+
+**--mlimit** *megabytes*
+
+ Specifies an upper limit on memory usage of the optimization and codegen. Set
+ to zero to disable the limit.
+
+
+
+**--output** *filename*
+
+ Whenever the test program produces output on its standard output stream, it
+ should match the contents of *filename* (the "reference output"). If you
+ do not use this option, **bugpoint** will attempt to generate a reference output
+ by compiling the program with the "safe" backend and running it.
+
+
+
+**--profile-info-file** *filename*
+
+ Profile file loaded by **--profile-loader**.
+
+
+
+**--run-{int,jit,llc,custom}**
+
+ Whenever the test program is compiled, **bugpoint** should generate code for it
+ using the specified code generator. These options allow you to choose the
+ interpreter, the JIT compiler, the static native code compiler, or a
+ custom command (see **--exec-command**) respectively.
+
+
+
+**--safe-{llc,custom}**
+
+ When debugging a code generator, **bugpoint** should use the specified code
+ generator as the "safe" code generator. This is a known-good code generator
+ used to generate the "reference output" if it has not been provided, and to
+ compile portions of the program that as they are excluded from the testcase.
+ These options allow you to choose the
+ static native code compiler, or a custom command, (see **--exec-command**)
+ respectively. The interpreter and the JIT backends cannot currently
+ be used as the "safe" backends.
+
+
+
+**--exec-command** *command*
+
+ This option defines the command to use with the **--run-custom** and
+ **--safe-custom** options to execute the bitcode testcase. This can
+ be useful for cross-compilation.
+
+
+
+**--compile-command** *command*
+
+ This option defines the command to use with the **--compile-custom**
+ option to compile the bitcode testcase. This can be useful for
+ testing compiler output without running any link or execute stages. To
+ generate a reduced unit test, you may add CHECK directives to the
+ testcase and pass the name of an executable compile-command script in this form:
+
+
+ .. code-block:: perl
+
+ #!/bin/sh
+ llc "$@"
+ not FileCheck [bugpoint input file].ll < bugpoint-test-program.s
+
+
+ This script will "fail" as long as FileCheck passes. So the result
+ will be the minimum bitcode that passes FileCheck.
+
+
+
+**--safe-path** *path*
+
+ This option defines the path to the command to execute with the
+ **--safe-{int,jit,llc,custom}**
+ option.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **bugpoint** succeeds in finding a problem, it will exit with 0. Otherwise,
+if an error occurs, it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+opt|opt
--- /dev/null
+.. _commands:
+
+LLVM Command Guide
+------------------
+
+The following documents are command descriptions for all of the LLVM tools.
+These pages describe how to use the LLVM commands and what their options are.
+Note that these pages do not describe all of the options available for all
+tools. To get a complete listing, pass the ``--help`` (general options) or
+``--help-hidden`` (general and debugging options) arguments to the tool you are
+interested in.
+
+Basic Commands
+~~~~~~~~~~~~~~
+
+.. toctree::
+ :maxdepth: 1
+
+ llvm-as
+ llvm-dis
+ opt
+ llc
+ lli
+ llvm-link
+ llvm-ar
+ llvm-ranlib
+ llvm-nm
+ llvm-prof
+ llvm-config
+ llvm-diff
+ llvm-cov
+ llvm-stress
+
+Debugging Tools
+~~~~~~~~~~~~~~~
+
+.. toctree::
+ :maxdepth: 1
+
+ bugpoint
+ llvm-extract
+ llvm-bcanalyzer
+
+Developer Tools
+~~~~~~~~~~~~~~~
+
+.. toctree::
+ :maxdepth: 1
+
+ FileCheck
+ tblgen
+ lit
+ llvm-build
--- /dev/null
+lit - LLVM Integrated Tester
+============================
+
+
+SYNOPSIS
+--------
+
+
+**lit** [*options*] [*tests*]
+
+
+DESCRIPTION
+-----------
+
+
+**lit** is a portable tool for executing LLVM and Clang style test suites,
+summarizing their results, and providing indication of failures. **lit** is
+designed to be a lightweight testing tool with as simple a user interface as
+possible.
+
+**lit** should be run with one or more *tests* to run specified on the command
+line. Tests can be either individual test files or directories to search for
+tests (see "TEST DISCOVERY").
+
+Each specified test will be executed (potentially in parallel) and once all
+tests have been run **lit** will print summary information on the number of tests
+which passed or failed (see "TEST STATUS RESULTS"). The **lit** program will
+execute with a non-zero exit code if any tests fail.
+
+By default **lit** will use a succinct progress display and will only print
+summary information for test failures. See "OUTPUT OPTIONS" for options
+controlling the **lit** progress display and output.
+
+**lit** also includes a number of options for controlling how tests are executed
+(specific features may depend on the particular test format). See "EXECUTION
+OPTIONS" for more information.
+
+Finally, **lit** also supports additional options for only running a subset of
+the options specified on the command line, see "SELECTION OPTIONS" for
+more information.
+
+Users interested in the **lit** architecture or designing a **lit** testing
+implementation should see "LIT INFRASTRUCTURE"
+
+
+GENERAL OPTIONS
+---------------
+
+
+
+**-h**, **--help**
+
+ Show the **lit** help message.
+
+
+
+**-j** *N*, **--threads**\ =\ *N*
+
+ Run *N* tests in parallel. By default, this is automatically chosen to match
+ the number of detected available CPUs.
+
+
+
+**--config-prefix**\ =\ *NAME*
+
+ Search for *NAME.cfg* and *NAME.site.cfg* when searching for test suites,
+ instead of *lit.cfg* and *lit.site.cfg*.
+
+
+
+**--param** *NAME*, **--param** *NAME*\ =\ *VALUE*
+
+ Add a user defined parameter *NAME* with the given *VALUE* (or the empty
+ string if not given). The meaning and use of these parameters is test suite
+ dependent.
+
+
+
+
+OUTPUT OPTIONS
+--------------
+
+
+
+**-q**, **--quiet**
+
+ Suppress any output except for test failures.
+
+
+
+**-s**, **--succinct**
+
+ Show less output, for example don't show information on tests that pass.
+
+
+
+**-v**, **--verbose**
+
+ Show more information on test failures, for example the entire test output
+ instead of just the test result.
+
+
+
+**--no-progress-bar**
+
+ Do not use curses based progress bar.
+
+
+
+
+EXECUTION OPTIONS
+-----------------
+
+
+
+**--path**\ =\ *PATH*
+
+ Specify an addition *PATH* to use when searching for executables in tests.
+
+
+
+**--vg**
+
+ Run individual tests under valgrind (using the memcheck tool). The
+ *--error-exitcode* argument for valgrind is used so that valgrind failures will
+ cause the program to exit with a non-zero status.
+
+
+
+**--vg-arg**\ =\ *ARG*
+
+ When *--vg* is used, specify an additional argument to pass to valgrind itself.
+
+
+
+**--time-tests**
+
+ Track the wall time individual tests take to execute and includes the results in
+ the summary output. This is useful for determining which tests in a test suite
+ take the most time to execute. Note that this option is most useful with *-j
+ 1*.
+
+
+
+
+SELECTION OPTIONS
+-----------------
+
+
+
+**--max-tests**\ =\ *N*
+
+ Run at most *N* tests and then terminate.
+
+
+
+**--max-time**\ =\ *N*
+
+ Spend at most *N* seconds (approximately) running tests and then terminate.
+
+
+
+**--shuffle**
+
+ Run the tests in a random order.
+
+
+
+
+ADDITIONAL OPTIONS
+------------------
+
+
+
+**--debug**
+
+ Run **lit** in debug mode, for debugging configuration issues and **lit** itself.
+
+
+
+**--show-suites**
+
+ List the discovered test suites as part of the standard output.
+
+
+
+**--no-tcl-as-sh**
+
+ Run Tcl scripts internally (instead of converting to shell scripts).
+
+
+
+**--repeat**\ =\ *N*
+
+ Run each test *N* times. Currently this is primarily useful for timing tests,
+ other results are not collated in any reasonable fashion.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**lit** will exit with an exit code of 1 if there are any FAIL or XPASS
+results. Otherwise, it will exit with the status 0. Other exit codes are used
+for non-test related failures (for example a user error or an internal program
+error).
+
+
+TEST DISCOVERY
+--------------
+
+
+The inputs passed to **lit** can be either individual tests, or entire
+directories or hierarchies of tests to run. When **lit** starts up, the first
+thing it does is convert the inputs into a complete list of tests to run as part
+of *test discovery*.
+
+In the **lit** model, every test must exist inside some *test suite*. **lit**
+resolves the inputs specified on the command line to test suites by searching
+upwards from the input path until it finds a *lit.cfg* or *lit.site.cfg*
+file. These files serve as both a marker of test suites and as configuration
+files which **lit** loads in order to understand how to find and run the tests
+inside the test suite.
+
+Once **lit** has mapped the inputs into test suites it traverses the list of
+inputs adding tests for individual files and recursively searching for tests in
+directories.
+
+This behavior makes it easy to specify a subset of tests to run, while still
+allowing the test suite configuration to control exactly how tests are
+interpreted. In addition, **lit** always identifies tests by the test suite they
+are in, and their relative path inside the test suite. For appropriately
+configured projects, this allows **lit** to provide convenient and flexible
+support for out-of-tree builds.
+
+
+TEST STATUS RESULTS
+-------------------
+
+
+Each test ultimately produces one of the following six results:
+
+
+**PASS**
+
+ The test succeeded.
+
+
+
+**XFAIL**
+
+ The test failed, but that is expected. This is used for test formats which allow
+ specifying that a test does not currently work, but wish to leave it in the test
+ suite.
+
+
+
+**XPASS**
+
+ The test succeeded, but it was expected to fail. This is used for tests which
+ were specified as expected to fail, but are now succeeding (generally because
+ the feature they test was broken and has been fixed).
+
+
+
+**FAIL**
+
+ The test failed.
+
+
+
+**UNRESOLVED**
+
+ The test result could not be determined. For example, this occurs when the test
+ could not be run, the test itself is invalid, or the test was interrupted.
+
+
+
+**UNSUPPORTED**
+
+ The test is not supported in this environment. This is used by test formats
+ which can report unsupported tests.
+
+
+
+Depending on the test format tests may produce additional information about
+their status (generally only for failures). See the Output|"OUTPUT OPTIONS"
+section for more information.
+
+
+LIT INFRASTRUCTURE
+------------------
+
+
+This section describes the **lit** testing architecture for users interested in
+creating a new **lit** testing implementation, or extending an existing one.
+
+**lit** proper is primarily an infrastructure for discovering and running
+arbitrary tests, and to expose a single convenient interface to these
+tests. **lit** itself doesn't know how to run tests, rather this logic is
+defined by *test suites*.
+
+TEST SUITES
+~~~~~~~~~~~
+
+
+As described in "TEST DISCOVERY", tests are always located inside a *test
+suite*. Test suites serve to define the format of the tests they contain, the
+logic for finding those tests, and any additional information to run the tests.
+
+**lit** identifies test suites as directories containing *lit.cfg* or
+*lit.site.cfg* files (see also **--config-prefix**). Test suites are initially
+discovered by recursively searching up the directory hierarchy for all the input
+files passed on the command line. You can use **--show-suites** to display the
+discovered test suites at startup.
+
+Once a test suite is discovered, its config file is loaded. Config files
+themselves are Python modules which will be executed. When the config file is
+executed, two important global variables are predefined:
+
+
+**lit**
+
+ The global **lit** configuration object (a *LitConfig* instance), which defines
+ the builtin test formats, global configuration parameters, and other helper
+ routines for implementing test configurations.
+
+
+
+**config**
+
+ This is the config object (a *TestingConfig* instance) for the test suite,
+ which the config file is expected to populate. The following variables are also
+ available on the *config* object, some of which must be set by the config and
+ others are optional or predefined:
+
+ **name** *[required]* The name of the test suite, for use in reports and
+ diagnostics.
+
+ **test_format** *[required]* The test format object which will be used to
+ discover and run tests in the test suite. Generally this will be a builtin test
+ format available from the *lit.formats* module.
+
+ **test_src_root** The filesystem path to the test suite root. For out-of-dir
+ builds this is the directory that will be scanned for tests.
+
+ **test_exec_root** For out-of-dir builds, the path to the test suite root inside
+ the object directory. This is where tests will be run and temporary output files
+ placed.
+
+ **environment** A dictionary representing the environment to use when executing
+ tests in the suite.
+
+ **suffixes** For **lit** test formats which scan directories for tests, this
+ variable is a list of suffixes to identify test files. Used by: *ShTest*,
+ *TclTest*.
+
+ **substitutions** For **lit** test formats which substitute variables into a test
+ script, the list of substitutions to perform. Used by: *ShTest*, *TclTest*.
+
+ **unsupported** Mark an unsupported directory, all tests within it will be
+ reported as unsupported. Used by: *ShTest*, *TclTest*.
+
+ **parent** The parent configuration, this is the config object for the directory
+ containing the test suite, or None.
+
+ **root** The root configuration. This is the top-most **lit** configuration in
+ the project.
+
+ **on_clone** The config is actually cloned for every subdirectory inside a test
+ suite, to allow local configuration on a per-directory basis. The *on_clone*
+ variable can be set to a Python function which will be called whenever a
+ configuration is cloned (for a subdirectory). The function should takes three
+ arguments: (1) the parent configuration, (2) the new configuration (which the
+ *on_clone* function will generally modify), and (3) the test path to the new
+ directory being scanned.
+
+
+
+
+TEST DISCOVERY
+~~~~~~~~~~~~~~
+
+
+Once test suites are located, **lit** recursively traverses the source directory
+(following *test_src_root*) looking for tests. When **lit** enters a
+sub-directory, it first checks to see if a nested test suite is defined in that
+directory. If so, it loads that test suite recursively, otherwise it
+instantiates a local test config for the directory (see "LOCAL CONFIGURATION
+FILES").
+
+Tests are identified by the test suite they are contained within, and the
+relative path inside that suite. Note that the relative path may not refer to an
+actual file on disk; some test formats (such as *GoogleTest*) define "virtual
+tests" which have a path that contains both the path to the actual test file and
+a subpath to identify the virtual test.
+
+
+LOCAL CONFIGURATION FILES
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+When **lit** loads a subdirectory in a test suite, it instantiates a local test
+configuration by cloning the configuration for the parent direction -- the root
+of this configuration chain will always be a test suite. Once the test
+configuration is cloned **lit** checks for a *lit.local.cfg* file in the
+subdirectory. If present, this file will be loaded and can be used to specialize
+the configuration for each individual directory. This facility can be used to
+define subdirectories of optional tests, or to change other configuration
+parameters -- for example, to change the test format, or the suffixes which
+identify test files.
+
+
+TEST RUN OUTPUT FORMAT
+~~~~~~~~~~~~~~~~~~~~~~
+
+
+The b<lit> output for a test run conforms to the following schema, in both short
+and verbose modes (although in short mode no PASS lines will be shown). This
+schema has been chosen to be relatively easy to reliably parse by a machine (for
+example in buildbot log scraping), and for other tools to generate.
+
+Each test result is expected to appear on a line that matches:
+
+<result code>: <test name> (<progress info>)
+
+where <result-code> is a standard test result such as PASS, FAIL, XFAIL, XPASS,
+UNRESOLVED, or UNSUPPORTED. The performance result codes of IMPROVED and
+REGRESSED are also allowed.
+
+The <test name> field can consist of an arbitrary string containing no newline.
+
+The <progress info> field can be used to report progress information such as
+(1/300) or can be empty, but even when empty the parentheses are required.
+
+Each test result may include additional (multiline) log information in the
+following format.
+
+<log delineator> TEST '(<test name>)' <trailing delineator>
+... log message ...
+<log delineator>
+
+where <test name> should be the name of a preceeding reported test, <log
+delineator> is a string of '\*' characters *at least* four characters long (the
+recommended length is 20), and <trailing delineator> is an arbitrary (unparsed)
+string.
+
+The following is an example of a test run output which consists of four tests A,
+B, C, and D, and a log message for the failing test C::
+
+ PASS: A (1 of 4)
+ PASS: B (2 of 4)
+ FAIL: C (3 of 4)
+ \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* TEST 'C' FAILED \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*
+ Test 'C' failed as a result of exit code 1.
+ \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*
+ PASS: D (4 of 4)
+
+
+LIT EXAMPLE TESTS
+~~~~~~~~~~~~~~~~~
+
+
+The **lit** distribution contains several example implementations of test suites
+in the *ExampleTests* directory.
+
+
+SEE ALSO
+--------
+
+
+valgrind(1)
--- /dev/null
+llc - LLVM static compiler
+==========================
+
+
+SYNOPSIS
+--------
+
+
+**llc** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llc** command compiles LLVM source inputs into assembly language for a
+specified architecture. The assembly language output can then be passed through
+a native assembler and linker to generate a native executable.
+
+The choice of architecture for the output assembly code is automatically
+determined from the input file, unless the **-march** option is used to override
+the default.
+
+
+OPTIONS
+-------
+
+
+If *filename* is - or omitted, **llc** reads from standard input. Otherwise, it
+will from *filename*. Inputs can be in either the LLVM assembly language
+format (.ll) or the LLVM bitcode format (.bc).
+
+If the **-o** option is omitted, then **llc** will send its output to standard
+output if the input is from standard input. If the **-o** option specifies -,
+then the output will also be sent to standard output.
+
+If no **-o** option is specified and an input file other than - is specified,
+then **llc** creates the output filename by taking the input filename,
+removing any existing *.bc* extension, and adding a *.s* suffix.
+
+Other **llc** options are as follows:
+
+End-user Options
+~~~~~~~~~~~~~~~~
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-O**\ =\ *uint*
+
+ Generate code at different optimization levels. These correspond to the *-O0*,
+ *-O1*, *-O2*, and *-O3* optimization levels used by **llvm-gcc** and
+ **clang**.
+
+
+
+**-mtriple**\ =\ *target triple*
+
+ Override the target triple specified in the input file with the specified
+ string.
+
+
+
+**-march**\ =\ *arch*
+
+ Specify the architecture for which to generate assembly, overriding the target
+ encoded in the input file. See the output of **llc -help** for a list of
+ valid architectures. By default this is inferred from the target triple or
+ autodetected to the current architecture.
+
+
+
+**-mcpu**\ =\ *cpuname*
+
+ Specify a specific chip in the current architecture to generate code for.
+ By default this is inferred from the target triple and autodetected to
+ the current architecture. For a list of available CPUs, use:
+ **llvm-as < /dev/null | llc -march=xyz -mcpu=help**
+
+
+
+**-mattr**\ =\ *a1,+a2,-a3,...*
+
+ Override or control specific attributes of the target, such as whether SIMD
+ operations are enabled or not. The default set of attributes is set by the
+ current CPU. For a list of available attributes, use:
+ **llvm-as < /dev/null | llc -march=xyz -mattr=help**
+
+
+
+**--disable-fp-elim**
+
+ Disable frame pointer elimination optimization.
+
+
+
+**--disable-excess-fp-precision**
+
+ Disable optimizations that may produce excess precision for floating point.
+ Note that this option can dramatically slow down code on some systems
+ (e.g. X86).
+
+
+
+**--enable-no-infs-fp-math**
+
+ Enable optimizations that assume no Inf values.
+
+
+
+**--enable-no-nans-fp-math**
+
+ Enable optimizations that assume no NAN values.
+
+
+
+**--enable-unsafe-fp-math**
+
+ Enable optimizations that make unsafe assumptions about IEEE math (e.g. that
+ addition is associative) or may not work for all input ranges. These
+ optimizations allow the code generator to make use of some instructions which
+ would otherwise not be usable (such as fsin on X86).
+
+
+
+**--enable-correct-eh-support**
+
+ Instruct the **lowerinvoke** pass to insert code for correct exception handling
+ support. This is expensive and is by default omitted for efficiency.
+
+
+
+**--stats**
+
+ Print statistics recorded by code-generation passes.
+
+
+
+**--time-passes**
+
+ Record the amount of time needed for each pass and print a report to standard
+ error.
+
+
+
+**--load**\ =\ *dso_path*
+
+ Dynamically load *dso_path* (a path to a dynamically shared object) that
+ implements an LLVM target. This will permit the target name to be used with the
+ **-march** option so that code can be generated for that target.
+
+
+
+
+Tuning/Configuration Options
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+
+**--print-machineinstrs**
+
+ Print generated machine code between compilation phases (useful for debugging).
+
+
+
+**--regalloc**\ =\ *allocator*
+
+ Specify the register allocator to use. The default *allocator* is *local*.
+ Valid register allocators are:
+
+
+ *simple*
+
+ Very simple "always spill" register allocator
+
+
+
+ *local*
+
+ Local register allocator
+
+
+
+ *linearscan*
+
+ Linear scan global register allocator
+
+
+
+ *iterativescan*
+
+ Iterative scan global register allocator
+
+
+
+
+
+**--spiller**\ =\ *spiller*
+
+ Specify the spiller to use for register allocators that support it. Currently
+ this option is used only by the linear scan register allocator. The default
+ *spiller* is *local*. Valid spillers are:
+
+
+ *simple*
+
+ Simple spiller
+
+
+
+ *local*
+
+ Local spiller
+
+
+
+
+
+
+Intel IA-32-specific Options
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+
+**--x86-asm-syntax=att|intel**
+
+ Specify whether to emit assembly code in AT&T syntax (the default) or intel
+ syntax.
+
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llc** succeeds, it will exit with 0. Otherwise, if an error occurs,
+it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+lli|lli
--- /dev/null
+lli - directly execute programs from LLVM bitcode
+=================================================
+
+
+SYNOPSIS
+--------
+
+
+**lli** [*options*] [*filename*] [*program args*]
+
+
+DESCRIPTION
+-----------
+
+
+**lli** directly executes programs in LLVM bitcode format. It takes a program
+in LLVM bitcode format and executes it using a just-in-time compiler, if one is
+available for the current architecture, or an interpreter. **lli** takes all of
+the same code generator options as llc|llc, but they are only effective when
+**lli** is using the just-in-time compiler.
+
+If *filename* is not specified, then **lli** reads the LLVM bitcode for the
+program from standard input.
+
+The optional *args* specified on the command line are passed to the program as
+arguments.
+
+
+GENERAL OPTIONS
+---------------
+
+
+
+**-fake-argv0**\ =\ *executable*
+
+ Override the ``argv[0]`` value passed into the executing program.
+
+
+
+**-force-interpreter**\ =\ *{false,true}*
+
+ If set to true, use the interpreter even if a just-in-time compiler is available
+ for this architecture. Defaults to false.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-load**\ =\ *puginfilename*
+
+ Causes **lli** to load the plugin (shared object) named *pluginfilename* and use
+ it for optimization.
+
+
+
+**-stats**
+
+ Print statistics from the code-generation passes. This is only meaningful for
+ the just-in-time compiler, at present.
+
+
+
+**-time-passes**
+
+ Record the amount of time needed for each code-generation pass and print it to
+ standard error.
+
+
+
+**-version**
+
+ Print out the version of **lli** and exit without doing anything else.
+
+
+
+
+TARGET OPTIONS
+--------------
+
+
+
+**-mtriple**\ =\ *target triple*
+
+ Override the target triple specified in the input bitcode file with the
+ specified string. This may result in a crash if you pick an
+ architecture which is not compatible with the current system.
+
+
+
+**-march**\ =\ *arch*
+
+ Specify the architecture for which to generate assembly, overriding the target
+ encoded in the bitcode file. See the output of **llc -help** for a list of
+ valid architectures. By default this is inferred from the target triple or
+ autodetected to the current architecture.
+
+
+
+**-mcpu**\ =\ *cpuname*
+
+ Specify a specific chip in the current architecture to generate code for.
+ By default this is inferred from the target triple and autodetected to
+ the current architecture. For a list of available CPUs, use:
+ **llvm-as < /dev/null | llc -march=xyz -mcpu=help**
+
+
+
+**-mattr**\ =\ *a1,+a2,-a3,...*
+
+ Override or control specific attributes of the target, such as whether SIMD
+ operations are enabled or not. The default set of attributes is set by the
+ current CPU. For a list of available attributes, use:
+ **llvm-as < /dev/null | llc -march=xyz -mattr=help**
+
+
+
+
+FLOATING POINT OPTIONS
+----------------------
+
+
+
+**-disable-excess-fp-precision**
+
+ Disable optimizations that may increase floating point precision.
+
+
+
+**-enable-no-infs-fp-math**
+
+ Enable optimizations that assume no Inf values.
+
+
+
+**-enable-no-nans-fp-math**
+
+ Enable optimizations that assume no NAN values.
+
+
+
+**-enable-unsafe-fp-math**
+
+ Causes **lli** to enable optimizations that may decrease floating point
+ precision.
+
+
+
+**-soft-float**
+
+ Causes **lli** to generate software floating point library calls instead of
+ equivalent hardware instructions.
+
+
+
+
+CODE GENERATION OPTIONS
+-----------------------
+
+
+
+**-code-model**\ =\ *model*
+
+ Choose the code model from:
+
+
+ .. code-block:: perl
+
+ default: Target default code model
+ small: Small code model
+ kernel: Kernel code model
+ medium: Medium code model
+ large: Large code model
+
+
+
+
+**-disable-post-RA-scheduler**
+
+ Disable scheduling after register allocation.
+
+
+
+**-disable-spill-fusing**
+
+ Disable fusing of spill code into instructions.
+
+
+
+**-enable-correct-eh-support**
+
+ Make the -lowerinvoke pass insert expensive, but correct, EH code.
+
+
+
+**-jit-enable-eh**
+
+ Exception handling should be enabled in the just-in-time compiler.
+
+
+
+**-join-liveintervals**
+
+ Coalesce copies (default=true).
+
+
+
+**-nozero-initialized-in-bss** Don't place zero-initialized symbols into the BSS section.
+
+
+
+**-pre-RA-sched**\ =\ *scheduler*
+
+ Instruction schedulers available (before register allocation):
+
+
+ .. code-block:: perl
+
+ =default: Best scheduler for the target
+ =none: No scheduling: breadth first sequencing
+ =simple: Simple two pass scheduling: minimize critical path and maximize processor utilization
+ =simple-noitin: Simple two pass scheduling: Same as simple except using generic latency
+ =list-burr: Bottom-up register reduction list scheduling
+ =list-tdrr: Top-down register reduction list scheduling
+ =list-td: Top-down list scheduler -print-machineinstrs - Print generated machine code
+
+
+
+
+**-regalloc**\ =\ *allocator*
+
+ Register allocator to use (default=linearscan)
+
+
+ .. code-block:: perl
+
+ =bigblock: Big-block register allocator
+ =linearscan: linear scan register allocator =local - local register allocator
+ =simple: simple register allocator
+
+
+
+
+**-relocation-model**\ =\ *model*
+
+ Choose relocation model from:
+
+
+ .. code-block:: perl
+
+ =default: Target default relocation model
+ =static: Non-relocatable code =pic - Fully relocatable, position independent code
+ =dynamic-no-pic: Relocatable external references, non-relocatable code
+
+
+
+
+**-spiller**
+
+ Spiller to use (default=local)
+
+
+ .. code-block:: perl
+
+ =simple: simple spiller
+ =local: local spiller
+
+
+
+
+**-x86-asm-syntax**\ =\ *syntax*
+
+ Choose style of code to emit from X86 backend:
+
+
+ .. code-block:: perl
+
+ =att: Emit AT&T-style assembly
+ =intel: Emit Intel-style assembly
+
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **lli** fails to load the program, it will exit with an exit code of 1.
+Otherwise, it will return the exit code of the program it executes.
+
+
+SEE ALSO
+--------
+
+
+llc|llc
--- /dev/null
+llvm-ar - LLVM archiver
+=======================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-ar** [-]{dmpqrtx}[Rabfikouz] [relpos] [count] <archive> [files...]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-ar** command is similar to the common Unix utility, ``ar``. It
+archives several files together into a single file. The intent for this is
+to produce archive libraries by LLVM bitcode that can be linked into an
+LLVM program. However, the archive can contain any kind of file. By default,
+**llvm-ar** generates a symbol table that makes linking faster because
+only the symbol table needs to be consulted, not each individual file member
+of the archive.
+
+The **llvm-ar** command can be used to *read* both SVR4 and BSD style archive
+files. However, it cannot be used to write them. While the **llvm-ar** command
+produces files that are *almost* identical to the format used by other ``ar``
+implementations, it has two significant departures in order to make the
+archive appropriate for LLVM. The first departure is that **llvm-ar** only
+uses BSD4.4 style long path names (stored immediately after the header) and
+never contains a string table for long names. The second departure is that the
+symbol table is formated for efficient construction of an in-memory data
+structure that permits rapid (red-black tree) lookups. Consequently, archives
+produced with **llvm-ar** usually won't be readable or editable with any
+``ar`` implementation or useful for linking. Using the ``f`` modifier to flatten
+file names will make the archive readable by other ``ar`` implementations
+but not for linking because the symbol table format for LLVM is unique. If an
+SVR4 or BSD style archive is used with the ``r`` (replace) or ``q`` (quick
+update) operations, the archive will be reconstructed in LLVM format. This
+means that the string table will be dropped (in deference to BSD 4.4 long names)
+and an LLVM symbol table will be added (by default). The system symbol table
+will be retained.
+
+Here's where **llvm-ar** departs from previous ``ar`` implementations:
+
+
+*Symbol Table*
+
+ Since **llvm-ar** is intended to archive bitcode files, the symbol table
+ won't make much sense to anything but LLVM. Consequently, the symbol table's
+ format has been simplified. It consists simply of a sequence of pairs
+ of a file member index number as an LSB 4byte integer and a null-terminated
+ string.
+
+
+
+*Long Paths*
+
+ Some ``ar`` implementations (SVR4) use a separate file member to record long
+ path names (> 15 characters). **llvm-ar** takes the BSD 4.4 and Mac OS X
+ approach which is to simply store the full path name immediately preceding
+ the data for the file. The path name is null terminated and may contain the
+ slash (/) character.
+
+
+
+*Compression*
+
+ **llvm-ar** can compress the members of an archive to save space. The
+ compression used depends on what's available on the platform and what choices
+ the LLVM Compressor utility makes. It generally favors bzip2 but will select
+ between "no compression" or bzip2 depending on what makes sense for the
+ file's content.
+
+
+
+*Directory Recursion*
+
+ Most ``ar`` implementations do not recurse through directories but simply
+ ignore directories if they are presented to the program in the *files*
+ option. **llvm-ar**, however, can recurse through directory structures and
+ add all the files under a directory, if requested.
+
+
+
+*TOC Verbose Output*
+
+ When **llvm-ar** prints out the verbose table of contents (``tv`` option), it
+ precedes the usual output with a character indicating the basic kind of
+ content in the file. A blank means the file is a regular file. A 'Z' means
+ the file is compressed. A 'B' means the file is an LLVM bitcode file. An
+ 'S' means the file is the symbol table.
+
+
+
+
+OPTIONS
+-------
+
+
+The options to **llvm-ar** are compatible with other ``ar`` implementations.
+However, there are a few modifiers (*zR*) that are not found in other ``ar``
+implementations. The options to **llvm-ar** specify a single basic operation to
+perform on the archive, a variety of modifiers for that operation, the name of
+the archive file, and an optional list of file names. These options are used to
+determine how **llvm-ar** should process the archive file.
+
+The Operations and Modifiers are explained in the sections below. The minimal
+set of options is at least one operator and the name of the archive. Typically
+archive files end with a ``.a`` suffix, but this is not required. Following
+the *archive-name* comes a list of *files* that indicate the specific members
+of the archive to operate on. If the *files* option is not specified, it
+generally means either "none" or "all" members, depending on the operation.
+
+Operations
+~~~~~~~~~~
+
+
+
+d
+
+ Delete files from the archive. No modifiers are applicable to this operation.
+ The *files* options specify which members should be removed from the
+ archive. It is not an error if a specified file does not appear in the archive.
+ If no *files* are specified, the archive is not modified.
+
+
+
+m[abi]
+
+ Move files from one location in the archive to another. The *a*, *b*, and
+ *i* modifiers apply to this operation. The *files* will all be moved
+ to the location given by the modifiers. If no modifiers are used, the files
+ will be moved to the end of the archive. If no *files* are specified, the
+ archive is not modified.
+
+
+
+p[k]
+
+ Print files to the standard output. The *k* modifier applies to this
+ operation. This operation simply prints the *files* indicated to the
+ standard output. If no *files* are specified, the entire archive is printed.
+ Printing bitcode files is ill-advised as they might confuse your terminal
+ settings. The *p* operation never modifies the archive.
+
+
+
+q[Rfz]
+
+ Quickly append files to the end of the archive. The *R*, *f*, and *z*
+ modifiers apply to this operation. This operation quickly adds the
+ *files* to the archive without checking for duplicates that should be
+ removed first. If no *files* are specified, the archive is not modified.
+ Because of the way that **llvm-ar** constructs the archive file, its dubious
+ whether the *q* operation is any faster than the *r* operation.
+
+
+
+r[Rabfuz]
+
+ Replace or insert file members. The *R*, *a*, *b*, *f*, *u*, and *z*
+ modifiers apply to this operation. This operation will replace existing
+ *files* or insert them at the end of the archive if they do not exist. If no
+ *files* are specified, the archive is not modified.
+
+
+
+t[v]
+
+ Print the table of contents. Without any modifiers, this operation just prints
+ the names of the members to the standard output. With the *v* modifier,
+ **llvm-ar** also prints out the file type (B=bitcode, Z=compressed, S=symbol
+ table, blank=regular file), the permission mode, the owner and group, the
+ size, and the date. If any *files* are specified, the listing is only for
+ those files. If no *files* are specified, the table of contents for the
+ whole archive is printed.
+
+
+
+x[oP]
+
+ Extract archive members back to files. The *o* modifier applies to this
+ operation. This operation retrieves the indicated *files* from the archive
+ and writes them back to the operating system's file system. If no
+ *files* are specified, the entire archive is extract.
+
+
+
+
+Modifiers (operation specific)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+The modifiers below are specific to certain operations. See the Operations
+section (above) to determine which modifiers are applicable to which operations.
+
+
+[a]
+
+ When inserting or moving member files, this option specifies the destination of
+ the new files as being after the *relpos* member. If *relpos* is not found,
+ the files are placed at the end of the archive.
+
+
+
+[b]
+
+ When inserting or moving member files, this option specifies the destination of
+ the new files as being before the *relpos* member. If *relpos* is not
+ found, the files are placed at the end of the archive. This modifier is
+ identical to the the *i* modifier.
+
+
+
+[f]
+
+ Normally, **llvm-ar** stores the full path name to a file as presented to it on
+ the command line. With this option, truncated (15 characters max) names are
+ used. This ensures name compatibility with older versions of ``ar`` but may also
+ thwart correct extraction of the files (duplicates may overwrite). If used with
+ the *R* option, the directory recursion will be performed but the file names
+ will all be flattened to simple file names.
+
+
+
+[i]
+
+ A synonym for the *b* option.
+
+
+
+[k]
+
+ Normally, **llvm-ar** will not print the contents of bitcode files when the
+ *p* operation is used. This modifier defeats the default and allows the
+ bitcode members to be printed.
+
+
+
+[N]
+
+ This option is ignored by **llvm-ar** but provided for compatibility.
+
+
+
+[o]
+
+ When extracting files, this option will cause **llvm-ar** to preserve the
+ original modification times of the files it writes.
+
+
+
+[P]
+
+ use full path names when matching
+
+
+
+[R]
+
+ This modifier instructions the *r* option to recursively process directories.
+ Without *R*, directories are ignored and only those *files* that refer to
+ files will be added to the archive. When *R* is used, any directories specified
+ with *files* will be scanned (recursively) to find files to be added to the
+ archive. Any file whose name begins with a dot will not be added.
+
+
+
+[u]
+
+ When replacing existing files in the archive, only replace those files that have
+ a time stamp than the time stamp of the member in the archive.
+
+
+
+[z]
+
+ When inserting or replacing any file in the archive, compress the file first.
+ This
+ modifier is safe to use when (previously) compressed bitcode files are added to
+ the archive; the compressed bitcode files will not be doubly compressed.
+
+
+
+
+Modifiers (generic)
+~~~~~~~~~~~~~~~~~~~
+
+
+The modifiers below may be applied to any operation.
+
+
+[c]
+
+ For all operations, **llvm-ar** will always create the archive if it doesn't
+ exist. Normally, **llvm-ar** will print a warning message indicating that the
+ archive is being created. Using this modifier turns off that warning.
+
+
+
+[s]
+
+ This modifier requests that an archive index (or symbol table) be added to the
+ archive. This is the default mode of operation. The symbol table will contain
+ all the externally visible functions and global variables defined by all the
+ bitcode files in the archive. Using this modifier is more efficient that using
+ llvm-ranlib|llvm-ranlib which also creates the symbol table.
+
+
+
+[S]
+
+ This modifier is the opposite of the *s* modifier. It instructs **llvm-ar** to
+ not build the symbol table. If both *s* and *S* are used, the last modifier to
+ occur in the options will prevail.
+
+
+
+[v]
+
+ This modifier instructs **llvm-ar** to be verbose about what it is doing. Each
+ editing operation taken against the archive will produce a line of output saying
+ what is being done.
+
+
+
+
+
+STANDARDS
+---------
+
+
+The **llvm-ar** utility is intended to provide a superset of the IEEE Std 1003.2
+(POSIX.2) functionality for ``ar``. **llvm-ar** can read both SVR4 and BSD4.4 (or
+Mac OS X) archives. If the ``f`` modifier is given to the ``x`` or ``r`` operations
+then **llvm-ar** will write SVR4 compatible archives. Without this modifier,
+**llvm-ar** will write BSD4.4 compatible archives that have long names
+immediately after the header and indicated using the "#1/ddd" notation for the
+name in the header.
+
+
+FILE FORMAT
+-----------
+
+
+The file format for LLVM Archive files is similar to that of BSD 4.4 or Mac OSX
+archive files. In fact, except for the symbol table, the ``ar`` commands on those
+operating systems should be able to read LLVM archive files. The details of the
+file format follow.
+
+Each archive begins with the archive magic number which is the eight printable
+characters "!<arch>\n" where \n represents the newline character (0x0A).
+Following the magic number, the file is composed of even length members that
+begin with an archive header and end with a \n padding character if necessary
+(to make the length even). Each file member is composed of a header (defined
+below), an optional newline-terminated "long file name" and the contents of
+the file.
+
+The fields of the header are described in the items below. All fields of the
+header contain only ASCII characters, are left justified and are right padded
+with space characters.
+
+
+name - char[16]
+
+ This field of the header provides the name of the archive member. If the name is
+ longer than 15 characters or contains a slash (/) character, then this field
+ contains ``#1/nnn`` where ``nnn`` provides the length of the name and the ``#1/``
+ is literal. In this case, the actual name of the file is provided in the ``nnn``
+ bytes immediately following the header. If the name is 15 characters or less, it
+ is contained directly in this field and terminated with a slash (/) character.
+
+
+
+date - char[12]
+
+ This field provides the date of modification of the file in the form of a
+ decimal encoded number that provides the number of seconds since the epoch
+ (since 00:00:00 Jan 1, 1970) per Posix specifications.
+
+
+
+uid - char[6]
+
+ This field provides the user id of the file encoded as a decimal ASCII string.
+ This field might not make much sense on non-Unix systems. On Unix, it is the
+ same value as the st_uid field of the stat structure returned by the stat(2)
+ operating system call.
+
+
+
+gid - char[6]
+
+ This field provides the group id of the file encoded as a decimal ASCII string.
+ This field might not make much sense on non-Unix systems. On Unix, it is the
+ same value as the st_gid field of the stat structure returned by the stat(2)
+ operating system call.
+
+
+
+mode - char[8]
+
+ This field provides the access mode of the file encoded as an octal ASCII
+ string. This field might not make much sense on non-Unix systems. On Unix, it
+ is the same value as the st_mode field of the stat structure returned by the
+ stat(2) operating system call.
+
+
+
+size - char[10]
+
+ This field provides the size of the file, in bytes, encoded as a decimal ASCII
+ string. If the size field is negative (starts with a minus sign, 0x02D), then
+ the archive member is stored in compressed form. The first byte of the archive
+ member's data indicates the compression type used. A value of 0 (0x30) indicates
+ that no compression was used. A value of 2 (0x32) indicates that bzip2
+ compression was used.
+
+
+
+fmag - char[2]
+
+ This field is the archive file member magic number. Its content is always the
+ two characters back tick (0x60) and newline (0x0A). This provides some measure
+ utility in identifying archive files that have been corrupted.
+
+
+
+The LLVM symbol table has the special name "#_LLVM_SYM_TAB_#". It is presumed
+that no regular archive member file will want this name. The LLVM symbol table
+is simply composed of a sequence of triplets: byte offset, length of symbol,
+and the symbol itself. Symbols are not null or newline terminated. Here are
+the details on each of these items:
+
+
+offset - vbr encoded 32-bit integer
+
+ The offset item provides the offset into the archive file where the bitcode
+ member is stored that is associated with the symbol. The offset value is 0
+ based at the start of the first "normal" file member. To derive the actual
+ file offset of the member, you must add the number of bytes occupied by the file
+ signature (8 bytes) and the symbol tables. The value of this item is encoded
+ using variable bit rate encoding to reduce the size of the symbol table.
+ Variable bit rate encoding uses the high bit (0x80) of each byte to indicate
+ if there are more bytes to follow. The remaining 7 bits in each byte carry bits
+ from the value. The final byte does not have the high bit set.
+
+
+
+length - vbr encoded 32-bit integer
+
+ The length item provides the length of the symbol that follows. Like this
+ *offset* item, the length is variable bit rate encoded.
+
+
+
+symbol - character array
+
+ The symbol item provides the text of the symbol that is associated with the
+ *offset*. The symbol is not terminated by any character. Its length is provided
+ by the *length* field. Note that is allowed (but unwise) to use non-printing
+ characters (even 0x00) in the symbol. This allows for multiple encodings of
+ symbol names.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-ar** succeeds, it will exit with 0. A usage error, results
+in an exit code of 1. A hard (file system typically) error results in an
+exit code of 2. Miscellaneous or unknown errors result in an
+exit code of 3.
+
+
+SEE ALSO
+--------
+
+
+llvm-ranlib|llvm-ranlib, ar(1)
--- /dev/null
+llvm-as - LLVM assembler
+========================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-as** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+**llvm-as** is the LLVM assembler. It reads a file containing human-readable
+LLVM assembly language, translates it to LLVM bitcode, and writes the result
+into a file or to standard output.
+
+If *filename* is omitted or is ``-``, then **llvm-as** reads its input from
+standard input.
+
+If an output file is not specified with the **-o** option, then
+**llvm-as** sends its output to a file or standard output by following
+these rules:
+
+
+\*
+
+ If the input is standard input, then the output is standard output.
+
+
+
+\*
+
+ If the input is a file that ends with ``.ll``, then the output file is of
+ the same name, except that the suffix is changed to ``.bc``.
+
+
+
+\*
+
+ If the input is a file that does not end with the ``.ll`` suffix, then the
+ output file has the same name as the input file, except that the ``.bc``
+ suffix is appended.
+
+
+
+
+OPTIONS
+-------
+
+
+
+**-f**
+
+ Enable binary output on terminals. Normally, **llvm-as** will refuse to
+ write raw bitcode output if the output stream is a terminal. With this option,
+ **llvm-as** will write raw bitcode regardless of the output device.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-o** *filename*
+
+ Specify the output file name. If *filename* is ``-``, then **llvm-as**
+ sends its output to standard output.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-as** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+llvm-dis|llvm-dis, gccas|gccas
--- /dev/null
+llvm-bcanalyzer - LLVM bitcode analyzer
+=======================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-bcanalyzer** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-bcanalyzer** command is a small utility for analyzing bitcode files.
+The tool reads a bitcode file (such as generated with the **llvm-as** tool) and
+produces a statistical report on the contents of the bitcode file. The tool
+can also dump a low level but human readable version of the bitcode file.
+This tool is probably not of much interest or utility except for those working
+directly with the bitcode file format. Most LLVM users can just ignore
+this tool.
+
+If *filename* is omitted or is ``-``, then **llvm-bcanalyzer** reads its input
+from standard input. This is useful for combining the tool into a pipeline.
+Output is written to the standard output.
+
+
+OPTIONS
+-------
+
+
+
+**-nodetails**
+
+ Causes **llvm-bcanalyzer** to abbreviate its output by writing out only a module
+ level summary. The details for individual functions are not displayed.
+
+
+
+**-dump**
+
+ Causes **llvm-bcanalyzer** to dump the bitcode in a human readable format. This
+ format is significantly different from LLVM assembly and provides details about
+ the encoding of the bitcode file.
+
+
+
+**-verify**
+
+ Causes **llvm-bcanalyzer** to verify the module produced by reading the
+ bitcode. This ensures that the statistics generated are based on a consistent
+ module.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-bcanalyzer** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value, usually 1.
+
+
+SUMMARY OUTPUT DEFINITIONS
+--------------------------
+
+
+The following items are always printed by llvm-bcanalyzer. They comprize the
+summary output.
+
+
+**Bitcode Analysis Of Module**
+
+ This just provides the name of the module for which bitcode analysis is being
+ generated.
+
+
+
+**Bitcode Version Number**
+
+ The bitcode version (not LLVM version) of the file read by the analyzer.
+
+
+
+**File Size**
+
+ The size, in bytes, of the entire bitcode file.
+
+
+
+**Module Bytes**
+
+ The size, in bytes, of the module block. Percentage is relative to File Size.
+
+
+
+**Function Bytes**
+
+ The size, in bytes, of all the function blocks. Percentage is relative to File
+ Size.
+
+
+
+**Global Types Bytes**
+
+ The size, in bytes, of the Global Types Pool. Percentage is relative to File
+ Size. This is the size of the definitions of all types in the bitcode file.
+
+
+
+**Constant Pool Bytes**
+
+ The size, in bytes, of the Constant Pool Blocks Percentage is relative to File
+ Size.
+
+
+
+**Module Globals Bytes**
+
+ Ths size, in bytes, of the Global Variable Definitions and their initializers.
+ Percentage is relative to File Size.
+
+
+
+**Instruction List Bytes**
+
+ The size, in bytes, of all the instruction lists in all the functions.
+ Percentage is relative to File Size. Note that this value is also included in
+ the Function Bytes.
+
+
+
+**Compaction Table Bytes**
+
+ The size, in bytes, of all the compaction tables in all the functions.
+ Percentage is relative to File Size. Note that this value is also included in
+ the Function Bytes.
+
+
+
+**Symbol Table Bytes**
+
+ The size, in bytes, of all the symbol tables in all the functions. Percentage is
+ relative to File Size. Note that this value is also included in the Function
+ Bytes.
+
+
+
+**Dependent Libraries Bytes**
+
+ The size, in bytes, of the list of dependent libraries in the module. Percentage
+ is relative to File Size. Note that this value is also included in the Module
+ Global Bytes.
+
+
+
+**Number Of Bitcode Blocks**
+
+ The total number of blocks of any kind in the bitcode file.
+
+
+
+**Number Of Functions**
+
+ The total number of function definitions in the bitcode file.
+
+
+
+**Number Of Types**
+
+ The total number of types defined in the Global Types Pool.
+
+
+
+**Number Of Constants**
+
+ The total number of constants (of any type) defined in the Constant Pool.
+
+
+
+**Number Of Basic Blocks**
+
+ The total number of basic blocks defined in all functions in the bitcode file.
+
+
+
+**Number Of Instructions**
+
+ The total number of instructions defined in all functions in the bitcode file.
+
+
+
+**Number Of Long Instructions**
+
+ The total number of long instructions defined in all functions in the bitcode
+ file. Long instructions are those taking greater than 4 bytes. Typically long
+ instructions are GetElementPtr with several indices, PHI nodes, and calls to
+ functions with large numbers of arguments.
+
+
+
+**Number Of Operands**
+
+ The total number of operands used in all instructions in the bitcode file.
+
+
+
+**Number Of Compaction Tables**
+
+ The total number of compaction tables in all functions in the bitcode file.
+
+
+
+**Number Of Symbol Tables**
+
+ The total number of symbol tables in all functions in the bitcode file.
+
+
+
+**Number Of Dependent Libs**
+
+ The total number of dependent libraries found in the bitcode file.
+
+
+
+**Total Instruction Size**
+
+ The total size of the instructions in all functions in the bitcode file.
+
+
+
+**Average Instruction Size**
+
+ The average number of bytes per instruction across all functions in the bitcode
+ file. This value is computed by dividing Total Instruction Size by Number Of
+ Instructions.
+
+
+
+**Maximum Type Slot Number**
+
+ The maximum value used for a type's slot number. Larger slot number values take
+ more bytes to encode.
+
+
+
+**Maximum Value Slot Number**
+
+ The maximum value used for a value's slot number. Larger slot number values take
+ more bytes to encode.
+
+
+
+**Bytes Per Value**
+
+ The average size of a Value definition (of any type). This is computed by
+ dividing File Size by the total number of values of any type.
+
+
+
+**Bytes Per Global**
+
+ The average size of a global definition (constants and global variables).
+
+
+
+**Bytes Per Function**
+
+ The average number of bytes per function definition. This is computed by
+ dividing Function Bytes by Number Of Functions.
+
+
+
+**# of VBR 32-bit Integers**
+
+ The total number of 32-bit integers encoded using the Variable Bit Rate
+ encoding scheme.
+
+
+
+**# of VBR 64-bit Integers**
+
+ The total number of 64-bit integers encoded using the Variable Bit Rate encoding
+ scheme.
+
+
+
+**# of VBR Compressed Bytes**
+
+ The total number of bytes consumed by the 32-bit and 64-bit integers that use
+ the Variable Bit Rate encoding scheme.
+
+
+
+**# of VBR Expanded Bytes**
+
+ The total number of bytes that would have been consumed by the 32-bit and 64-bit
+ integers had they not been compressed with the Variable Bit Rage encoding
+ scheme.
+
+
+
+**Bytes Saved With VBR**
+
+ The total number of bytes saved by using the Variable Bit Rate encoding scheme.
+ The percentage is relative to # of VBR Expanded Bytes.
+
+
+
+
+DETAILED OUTPUT DEFINITIONS
+---------------------------
+
+
+The following definitions occur only if the -nodetails option was not given.
+The detailed output provides additional information on a per-function basis.
+
+
+**Type**
+
+ The type signature of the function.
+
+
+
+**Byte Size**
+
+ The total number of bytes in the function's block.
+
+
+
+**Basic Blocks**
+
+ The number of basic blocks defined by the function.
+
+
+
+**Instructions**
+
+ The number of instructions defined by the function.
+
+
+
+**Long Instructions**
+
+ The number of instructions using the long instruction format in the function.
+
+
+
+**Operands**
+
+ The number of operands used by all instructions in the function.
+
+
+
+**Instruction Size**
+
+ The number of bytes consumed by instructions in the function.
+
+
+
+**Average Instruction Size**
+
+ The average number of bytes consumed by the instructions in the function. This
+ value is computed by dividing Instruction Size by Instructions.
+
+
+
+**Bytes Per Instruction**
+
+ The average number of bytes used by the function per instruction. This value is
+ computed by dividing Byte Size by Instructions. Note that this is not the same
+ as Average Instruction Size. It computes a number relative to the total function
+ size not just the size of the instruction list.
+
+
+
+**Number of VBR 32-bit Integers**
+
+ The total number of 32-bit integers found in this function (for any use).
+
+
+
+**Number of VBR 64-bit Integers**
+
+ The total number of 64-bit integers found in this function (for any use).
+
+
+
+**Number of VBR Compressed Bytes**
+
+ The total number of bytes in this function consumed by the 32-bit and 64-bit
+ integers that use the Variable Bit Rate encoding scheme.
+
+
+
+**Number of VBR Expanded Bytes**
+
+ The total number of bytes in this function that would have been consumed by
+ the 32-bit and 64-bit integers had they not been compressed with the Variable
+ Bit Rate encoding scheme.
+
+
+
+**Bytes Saved With VBR**
+
+ The total number of bytes saved in this function by using the Variable Bit
+ Rate encoding scheme. The percentage is relative to # of VBR Expanded Bytes.
+
+
+
+
+SEE ALSO
+--------
+
+
+llvm-dis|llvm-dis, `http://llvm.org/docs/BitCodeFormat.html <http://llvm.org/docs/BitCodeFormat.html>`_
--- /dev/null
+llvm-build - LLVM Project Build Utility
+=======================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-build** [*options*]
+
+
+DESCRIPTION
+-----------
+
+
+**llvm-build** is a tool for working with LLVM projects that use the LLVMBuild
+system for describing their components.
+
+At heart, **llvm-build** is responsible for loading, verifying, and manipulating
+the project's component data. The tool is primarily designed for use in
+implementing build systems and tools which need access to the project structure
+information.
+
+
+OPTIONS
+-------
+
+
+
+**-h**, **--help**
+
+ Print the builtin program help.
+
+
+
+**--source-root**\ =\ *PATH*
+
+ If given, load the project at the given source root path. If this option is not
+ given, the location of the project sources will be inferred from the location of
+ the **llvm-build** script itself.
+
+
+
+**--print-tree**
+
+ Print the component tree for the project.
+
+
+
+**--write-library-table**
+
+ Write out the C++ fragment which defines the components, library names, and
+ required libraries. This C++ fragment is built into llvm-config|llvm-config
+ in order to provide clients with the list of required libraries for arbitrary
+ component combinations.
+
+
+
+**--write-llvmbuild**
+
+ Write out new *LLVMBuild.txt* files based on the loaded components. This is
+ useful for auto-upgrading the schema of the files. **llvm-build** will try to a
+ limited extent to preserve the comments which were written in the original
+ source file, although at this time it only preserves block comments that preceed
+ the section names in the *LLVMBuild* files.
+
+
+
+**--write-cmake-fragment**
+
+ Write out the LLVMBuild in the form of a CMake fragment, so it can easily be
+ consumed by the CMake based build system. The exact contents and format of this
+ file are closely tied to how LLVMBuild is integrated with CMake, see LLVM's
+ top-level CMakeLists.txt.
+
+
+
+**--write-make-fragment**
+
+ Write out the LLVMBuild in the form of a Makefile fragment, so it can easily be
+ consumed by a Make based build system. The exact contents and format of this
+ file are closely tied to how LLVMBuild is integrated with the Makefiles, see
+ LLVM's Makefile.rules.
+
+
+
+**--llvmbuild-source-root**\ =\ *PATH*
+
+ If given, expect the *LLVMBuild* files for the project to be rooted at the
+ given path, instead of inside the source tree itself. This option is primarily
+ designed for use in conjunction with **--write-llvmbuild** to test changes to
+ *LLVMBuild* schema.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-build** exits with 0 if operation was successful. Otherwise, it will exist
+with a non-zero value.
--- /dev/null
+llvm-config - Print LLVM compilation options
+============================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-config** *option* [*components*...]
+
+
+DESCRIPTION
+-----------
+
+
+**llvm-config** makes it easier to build applications that use LLVM. It can
+print the compiler flags, linker flags and object libraries needed to link
+against LLVM.
+
+
+EXAMPLES
+--------
+
+
+To link against the JIT:
+
+
+.. code-block:: perl
+
+ g++ `llvm-config --cxxflags` -o HowToUseJIT.o -c HowToUseJIT.cpp
+ g++ `llvm-config --ldflags` -o HowToUseJIT HowToUseJIT.o \
+ `llvm-config --libs engine bcreader scalaropts`
+
+
+
+OPTIONS
+-------
+
+
+
+**--version**
+
+ Print the version number of LLVM.
+
+
+
+**-help**
+
+ Print a summary of **llvm-config** arguments.
+
+
+
+**--prefix**
+
+ Print the installation prefix for LLVM.
+
+
+
+**--src-root**
+
+ Print the source root from which LLVM was built.
+
+
+
+**--obj-root**
+
+ Print the object root used to build LLVM.
+
+
+
+**--bindir**
+
+ Print the installation directory for LLVM binaries.
+
+
+
+**--includedir**
+
+ Print the installation directory for LLVM headers.
+
+
+
+**--libdir**
+
+ Print the installation directory for LLVM libraries.
+
+
+
+**--cxxflags**
+
+ Print the C++ compiler flags needed to use LLVM headers.
+
+
+
+**--ldflags**
+
+ Print the flags needed to link against LLVM libraries.
+
+
+
+**--libs**
+
+ Print all the libraries needed to link against the specified LLVM
+ *components*, including any dependencies.
+
+
+
+**--libnames**
+
+ Similar to **--libs**, but prints the bare filenames of the libraries
+ without **-l** or pathnames. Useful for linking against a not-yet-installed
+ copy of LLVM.
+
+
+
+**--libfiles**
+
+ Similar to **--libs**, but print the full path to each library file. This is
+ useful when creating makefile dependencies, to ensure that a tool is relinked if
+ any library it uses changes.
+
+
+
+**--components**
+
+ Print all valid component names.
+
+
+
+**--targets-built**
+
+ Print the component names for all targets supported by this copy of LLVM.
+
+
+
+**--build-mode**
+
+ Print the build mode used when LLVM was built (e.g. Debug or Release)
+
+
+
+
+COMPONENTS
+----------
+
+
+To print a list of all available components, run **llvm-config
+--components**. In most cases, components correspond directly to LLVM
+libraries. Useful "virtual" components include:
+
+
+**all**
+
+ Includes all LLVM libaries. The default if no components are specified.
+
+
+
+**backend**
+
+ Includes either a native backend or the C backend.
+
+
+
+**engine**
+
+ Includes either a native JIT or the bitcode interpreter.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-config** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
--- /dev/null
+llvm-cov - emit coverage information
+====================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-cov** [-gcno=filename] [-gcda=filename] [dump]
+
+
+DESCRIPTION
+-----------
+
+
+The experimental **llvm-cov** tool reads in description file generated by compiler
+and coverage data file generated by instrumented program. This program assumes
+that the description and data file uses same format as gcov files.
+
+
+OPTIONS
+-------
+
+
+
+**-gcno=filename]**
+
+ This option selects input description file generated by compiler while instrumenting
+ program.
+
+
+
+**-gcda=filename]**
+
+ This option selects coverage data file generated by instrumented compiler.
+
+
+
+**-dump**
+
+ This options enables output dump that is suitable for a developer to help debug
+ **llvm-cov** itself.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-cov** returns 1 if it cannot read input files. Otherwise, it exits with zero.
--- /dev/null
+llvm-diff - LLVM structural 'diff'
+==================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-diff** [*options*] *module 1* *module 2* [*global name ...*]
+
+
+DESCRIPTION
+-----------
+
+
+**llvm-diff** compares the structure of two LLVM modules, primarily
+focusing on differences in function definitions. Insignificant
+differences, such as changes in the ordering of globals or in the
+names of local values, are ignored.
+
+An input module will be interpreted as an assembly file if its name
+ends in '.ll'; otherwise it will be read in as a bitcode file.
+
+If a list of global names is given, just the values with those names
+are compared; otherwise, all global values are compared, and
+diagnostics are produced for globals which only appear in one module
+or the other.
+
+**llvm-diff** compares two functions by comparing their basic blocks,
+beginning with the entry blocks. If the terminators seem to match,
+then the corresponding successors are compared; otherwise they are
+ignored. This algorithm is very sensitive to changes in control flow,
+which tend to stop any downstream changes from being detected.
+
+**llvm-diff** is intended as a debugging tool for writers of LLVM
+passes and frontends. It does not have a stable output format.
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-diff** finds no differences between the modules, it will exit
+with 0 and produce no output. Otherwise it will exit with a non-zero
+value.
+
+
+BUGS
+----
+
+
+Many important differences, like changes in linkage or function
+attributes, are not diagnosed.
+
+Changes in memory behavior (for example, coalescing loads) can cause
+massive detected differences in blocks.
--- /dev/null
+llvm-dis - LLVM disassembler
+============================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-dis** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-dis** command is the LLVM disassembler. It takes an LLVM
+bitcode file and converts it into human-readable LLVM assembly language.
+
+If filename is omitted or specified as ``-``, **llvm-dis** reads its
+input from standard input.
+
+If the input is being read from standard input, then **llvm-dis**
+will send its output to standard output by default. Otherwise, the
+output will be written to a file named after the input file, with
+a ``.ll`` suffix added (any existing ``.bc`` suffix will first be
+removed). You can override the choice of output file using the
+**-o** option.
+
+
+OPTIONS
+-------
+
+
+
+**-f**
+
+ Enable binary output on terminals. Normally, **llvm-dis** will refuse to
+ write raw bitcode output if the output stream is a terminal. With this option,
+ **llvm-dis** will write raw bitcode regardless of the output device.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-o** *filename*
+
+ Specify the output file name. If *filename* is -, then the output is sent
+ to standard output.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-dis** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+llvm-as|llvm-as
--- /dev/null
+llvm-extract - extract a function from an LLVM module
+=====================================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-extract** [*options*] **--func** *function-name* [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-extract** command takes the name of a function and extracts it from
+the specified LLVM bitcode file. It is primarily used as a debugging tool to
+reduce test cases from larger programs that are triggering a bug.
+
+In addition to extracting the bitcode of the specified function,
+**llvm-extract** will also remove unreachable global variables, prototypes, and
+unused types.
+
+The **llvm-extract** command reads its input from standard input if filename is
+omitted or if filename is -. The output is always written to standard output,
+unless the **-o** option is specified (see below).
+
+
+OPTIONS
+-------
+
+
+
+**-f**
+
+ Enable binary output on terminals. Normally, **llvm-extract** will refuse to
+ write raw bitcode output if the output stream is a terminal. With this option,
+ **llvm-extract** will write raw bitcode regardless of the output device.
+
+
+
+**--func** *function-name*
+
+ Extract the function named *function-name* from the LLVM bitcode. May be
+ specified multiple times to extract multiple functions at once.
+
+
+
+**--rfunc** *function-regular-expr*
+
+ Extract the function(s) matching *function-regular-expr* from the LLVM bitcode.
+ All functions matching the regular expression will be extracted. May be
+ specified multiple times.
+
+
+
+**--glob** *global-name*
+
+ Extract the global variable named *global-name* from the LLVM bitcode. May be
+ specified multiple times to extract multiple global variables at once.
+
+
+
+**--rglob** *glob-regular-expr*
+
+ Extract the global variable(s) matching *global-regular-expr* from the LLVM
+ bitcode. All global variables matching the regular expression will be extracted.
+ May be specified multiple times.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-o** *filename*
+
+ Specify the output filename. If filename is "-" (the default), then
+ **llvm-extract** sends its output to standard output.
+
+
+
+**-S**
+
+ Write output in LLVM intermediate language (instead of bitcode).
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-extract** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+bugpoint|bugpoint
--- /dev/null
+llvm-link - LLVM linker
+=======================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-link** [*options*] *filename ...*
+
+
+DESCRIPTION
+-----------
+
+
+**llvm-link** takes several LLVM bitcode files and links them together into a
+single LLVM bitcode file. It writes the output file to standard output, unless
+the **-o** option is used to specify a filename.
+
+**llvm-link** attempts to load the input files from the current directory. If
+that fails, it looks for each file in each of the directories specified by the
+**-L** options on the command line. The library search paths are global; each
+one is searched for every input file if necessary. The directories are searched
+in the order they were specified on the command line.
+
+
+OPTIONS
+-------
+
+
+
+**-L** *directory*
+
+ Add the specified *directory* to the library search path. When looking for
+ libraries, **llvm-link** will look in path name for libraries. This option can be
+ specified multiple times; **llvm-link** will search inside these directories in
+ the order in which they were specified on the command line.
+
+
+
+**-f**
+
+ Enable binary output on terminals. Normally, **llvm-link** will refuse to
+ write raw bitcode output if the output stream is a terminal. With this option,
+ **llvm-link** will write raw bitcode regardless of the output device.
+
+
+
+**-o** *filename*
+
+ Specify the output file name. If *filename* is ``-``, then **llvm-link** will
+ write its output to standard output.
+
+
+
+**-S**
+
+ Write output in LLVM intermediate language (instead of bitcode).
+
+
+
+**-d**
+
+ If specified, **llvm-link** prints a human-readable version of the output
+ bitcode file to standard error.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-v**
+
+ Verbose mode. Print information about what **llvm-link** is doing. This
+ typically includes a message for each bitcode file linked in and for each
+ library found.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-link** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+gccld|gccld
--- /dev/null
+llvm-nm - list LLVM bitcode file's symbol table
+===============================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-nm** [*options*] [*filenames...*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-nm** utility lists the names of symbols from the LLVM bitcode files,
+or **ar** archives containing LLVM bitcode files, named on the command line.
+Each symbol is listed along with some simple information about its provenance.
+If no file name is specified, or *-* is used as a file name, **llvm-nm** will
+process a bitcode file on its standard input stream.
+
+**llvm-nm**'s default output format is the traditional BSD **nm** output format.
+Each such output record consists of an (optional) 8-digit hexadecimal address,
+followed by a type code character, followed by a name, for each symbol. One
+record is printed per line; fields are separated by spaces. When the address is
+omitted, it is replaced by 8 spaces.
+
+Type code characters currently supported, and their meanings, are as follows:
+
+
+U
+
+ Named object is referenced but undefined in this bitcode file
+
+
+
+C
+
+ Common (multiple definitions link together into one def)
+
+
+
+W
+
+ Weak reference (multiple definitions link together into zero or one definitions)
+
+
+
+t
+
+ Local function (text) object
+
+
+
+T
+
+ Global function (text) object
+
+
+
+d
+
+ Local data object
+
+
+
+D
+
+ Global data object
+
+
+
+?
+
+ Something unrecognizable
+
+
+
+Because LLVM bitcode files typically contain objects that are not considered to
+have addresses until they are linked into an executable image or dynamically
+compiled "just-in-time", **llvm-nm** does not print an address for any symbol,
+even symbols which are defined in the bitcode file.
+
+
+OPTIONS
+-------
+
+
+
+**-P**
+
+ Use POSIX.2 output format. Alias for **--format=posix**.
+
+
+
+**-B** (default)
+
+ Use BSD output format. Alias for **--format=bsd**.
+
+
+
+**-help**
+
+ Print a summary of command-line options and their meanings.
+
+
+
+**--defined-only**
+
+ Print only symbols defined in this bitcode file (as opposed to
+ symbols which may be referenced by objects in this file, but not
+ defined in this file.)
+
+
+
+**--extern-only**, **-g**
+
+ Print only symbols whose definitions are external; that is, accessible
+ from other bitcode files.
+
+
+
+**--undefined-only**, **-u**
+
+ Print only symbols referenced but not defined in this bitcode file.
+
+
+
+
+ Select an output format; *fmt* may be *sysv*, *posix*, or *bsd*. The
+ default is *bsd*.
+
+
+
+
+BUGS
+----
+
+
+**llvm-nm** cannot demangle C++ mangled names, like GNU **nm** can.
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-nm** exits with an exit code of zero.
+
+
+SEE ALSO
+--------
+
+
+llvm-dis|llvm-dis, ar(1), nm(1)
--- /dev/null
+llvm-prof - print execution profile of LLVM program
+===================================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-prof** [*options*] [*bitcode file*] [*llvmprof.out*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-prof** tool reads in an *llvmprof.out* file (which can
+optionally use a specific file with the third program argument), a bitcode file
+for the program, and produces a human readable report, suitable for determining
+where the program hotspots are.
+
+This program is often used in conjunction with the *utils/profile.pl*
+script. This script automatically instruments a program, runs it with the JIT,
+then runs **llvm-prof** to format a report. To get more information about
+*utils/profile.pl*, execute it with the **-help** option.
+
+
+OPTIONS
+-------
+
+
+
+**--annotated-llvm** or **-A**
+
+ In addition to the normal report printed, print out the code for the
+ program, annotated with execution frequency information. This can be
+ particularly useful when trying to visualize how frequently basic blocks
+ are executed. This is most useful with basic block profiling
+ information or better.
+
+
+
+**--print-all-code**
+
+ Using this option enables the **--annotated-llvm** option, but it
+ prints the entire module, instead of just the most commonly executed
+ functions.
+
+
+
+**--time-passes**
+
+ Record the amount of time needed for each pass and print it to standard
+ error.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-prof** returns 1 if it cannot load the bitcode file or the profile
+information. Otherwise, it exits with zero.
--- /dev/null
+llvm-ranlib - Generate index for LLVM archive
+=============================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-ranlib** [--version] [-help] <archive-file>
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-ranlib** command is similar to the common Unix utility, ``ranlib``. It
+adds or updates the symbol table in an LLVM archive file. Note that using the
+**llvm-ar** modifier *s* is usually more efficient than running **llvm-ranlib**
+which is only provided only for completness and compatibility. Unlike other
+implementations of ``ranlib``, **llvm-ranlib** indexes LLVM bitcode files, not
+native object modules. You can list the contents of the symbol table with the
+``llvm-nm -s`` command.
+
+
+OPTIONS
+-------
+
+
+
+*archive-file*
+
+ Specifies the archive-file to which the symbol table is added or updated.
+
+
+
+*--version*
+
+ Print the version of **llvm-ranlib** and exit without building a symbol table.
+
+
+
+*-help*
+
+ Print usage help for **llvm-ranlib** and exit without building a symbol table.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-ranlib** succeeds, it will exit with 0. If an error occurs, a non-zero
+exit code will be returned.
+
+
+SEE ALSO
+--------
+
+
+llvm-ar|llvm-ar, ranlib(1)
--- /dev/null
+llvm-stress - generate random .ll files
+=======================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-cov** [-gcno=filename] [-gcda=filename] [dump]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-stress** tool is used to generate random .ll files that can be used to
+test different components of LLVM.
+
+
+OPTIONS
+-------
+
+
+
+**-o** *filename*
+
+ Specify the output filename.
+
+
+
+**-size** *size*
+
+ Specify the size of the generated .ll file.
+
+
+
+**-seed** *seed*
+
+ Specify the seed to be used for the randomly generated instructions.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-stress** returns 0.
--- /dev/null
+opt - LLVM optimizer
+====================
+
+
+SYNOPSIS
+--------
+
+
+**opt** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **opt** command is the modular LLVM optimizer and analyzer. It takes LLVM
+source files as input, runs the specified optimizations or analyses on it, and then
+outputs the optimized file or the analysis results. The function of
+**opt** depends on whether the **-analyze** option is given.
+
+When **-analyze** is specified, **opt** performs various analyses of the input
+source. It will usually print the results on standard output, but in a few
+cases, it will print output to standard error or generate a file with the
+analysis output, which is usually done when the output is meant for another
+program.
+
+While **-analyze** is *not* given, **opt** attempts to produce an optimized
+output file. The optimizations available via **opt** depend upon what
+libraries were linked into it as well as any additional libraries that have
+been loaded with the **-load** option. Use the **-help** option to determine
+what optimizations you can use.
+
+If *filename* is omitted from the command line or is *-*, **opt** reads its
+input from standard input. Inputs can be in either the LLVM assembly language
+format (.ll) or the LLVM bitcode format (.bc).
+
+If an output filename is not specified with the **-o** option, **opt**
+writes its output to the standard output.
+
+
+OPTIONS
+-------
+
+
+
+**-f**
+
+ Enable binary output on terminals. Normally, **opt** will refuse to
+ write raw bitcode output if the output stream is a terminal. With this option,
+ **opt** will write raw bitcode regardless of the output device.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-o** *filename*
+
+ Specify the output filename.
+
+
+
+**-S**
+
+ Write output in LLVM intermediate language (instead of bitcode).
+
+
+
+**-{passname}**
+
+ **opt** provides the ability to run any of LLVM's optimization or analysis passes
+ in any order. The **-help** option lists all the passes available. The order in
+ which the options occur on the command line are the order in which they are
+ executed (within pass constraints).
+
+
+
+**-std-compile-opts**
+
+ This is short hand for a standard list of *compile time optimization* passes.
+ This is typically used to optimize the output from the llvm-gcc front end. It
+ might be useful for other front end compilers as well. To discover the full set
+ of options available, use the following command:
+
+
+ .. code-block:: perl
+
+ llvm-as < /dev/null | opt -std-compile-opts -disable-output -debug-pass=Arguments
+
+
+
+
+**-disable-inlining**
+
+ This option is only meaningful when **-std-compile-opts** is given. It simply
+ removes the inlining pass from the standard list.
+
+
+
+**-disable-opt**
+
+ This option is only meaningful when **-std-compile-opts** is given. It disables
+ most, but not all, of the **-std-compile-opts**. The ones that remain are
+ **-verify**, **-lower-setjmp**, and **-funcresolve**.
+
+
+
+**-strip-debug**
+
+ This option causes opt to strip debug information from the module before
+ applying other optimizations. It is essentially the same as **-strip** but it
+ ensures that stripping of debug information is done first.
+
+
+
+**-verify-each**
+
+ This option causes opt to add a verify pass after every pass otherwise specified
+ on the command line (including **-verify**). This is useful for cases where it
+ is suspected that a pass is creating an invalid module but it is not clear which
+ pass is doing it. The combination of **-std-compile-opts** and **-verify-each**
+ can quickly track down this kind of problem.
+
+
+
+**-profile-info-file** *filename*
+
+ Specify the name of the file loaded by the -profile-loader option.
+
+
+
+**-stats**
+
+ Print statistics.
+
+
+
+**-time-passes**
+
+ Record the amount of time needed for each pass and print it to standard
+ error.
+
+
+
+**-debug**
+
+ If this is a debug build, this option will enable debug printouts
+ from passes which use the *DEBUG()* macro. See the **LLVM Programmer's
+ Manual**, section *#DEBUG* for more information.
+
+
+
+**-load**\ =\ *plugin*
+
+ Load the dynamic object *plugin*. This object should register new optimization
+ or analysis passes. Once loaded, the object will add new command line options to
+ enable various optimizations or analyses. To see the new complete list of
+ optimizations, use the **-help** and **-load** options together. For example:
+
+
+ .. code-block:: perl
+
+ opt -load=plugin.so -help
+
+
+
+
+**-p**
+
+ Print module after each transformation.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **opt** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
--- /dev/null
+tblgen - Target Description To C++ Code Generator
+=================================================
+
+
+SYNOPSIS
+--------
+
+
+**tblgen** [*options*] [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+**tblgen** translates from target description (.td) files into C++ code that can
+be included in the definition of an LLVM target library. Most users of LLVM will
+not need to use this program. It is only for assisting with writing an LLVM
+target backend.
+
+The input and output of **tblgen** is beyond the scope of this short
+introduction. Please see the *CodeGeneration* page in the LLVM documentation.
+
+The *filename* argument specifies the name of a Target Description (.td) file
+to read as input.
+
+
+OPTIONS
+-------
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-o** *filename*
+
+ Specify the output file name. If *filename* is ``-``, then **tblgen**
+ sends its output to standard output.
+
+
+
+**-I** *directory*
+
+ Specify where to find other target description files for inclusion. The
+ *directory* value should be a full or partial path to a directory that contains
+ target description files.
+
+
+
+**-asmparsernum** *N*
+
+ Make -gen-asm-parser emit assembly writer number *N*.
+
+
+
+**-asmwriternum** *N*
+
+ Make -gen-asm-writer emit assembly writer number *N*.
+
+
+
+**-class** *class Name*
+
+ Print the enumeration list for this class.
+
+
+
+**-print-records**
+
+ Print all records to standard output (default).
+
+
+
+**-print-enums**
+
+ Print enumeration values for a class
+
+
+
+**-print-sets**
+
+ Print expanded sets for testing DAG exprs.
+
+
+
+**-gen-emitter**
+
+ Generate machine code emitter.
+
+
+
+**-gen-register-info**
+
+ Generate registers and register classes info.
+
+
+
+**-gen-instr-info**
+
+ Generate instruction descriptions.
+
+
+
+**-gen-asm-writer**
+
+ Generate the assembly writer.
+
+
+
+**-gen-disassembler**
+
+ Generate disassembler.
+
+
+
+**-gen-pseudo-lowering**
+
+ Generate pseudo instruction lowering.
+
+
+
+**-gen-dag-isel**
+
+ Generate a DAG (Directed Acycle Graph) instruction selector.
+
+
+
+**-gen-asm-matcher**
+
+ Generate assembly instruction matcher.
+
+
+
+**-gen-dfa-packetizer**
+
+ Generate DFA Packetizer for VLIW targets.
+
+
+
+**-gen-fast-isel**
+
+ Generate a "fast" instruction selector.
+
+
+
+**-gen-subtarget**
+
+ Generate subtarget enumerations.
+
+
+
+**-gen-intrinsic**
+
+ Generate intrinsic information.
+
+
+
+**-gen-tgt-intrinsic**
+
+ Generate target intrinsic information.
+
+
+
+**-gen-enhanced-disassembly-info**
+
+ Generate enhanced disassembly info.
+
+
+
+**-version**
+
+ Show the version number of this program.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **tblgen** succeeds, it will exit with 0. Otherwise, if an error
+occurs, it will exit with a non-zero value.
projects / oota-llvm.git / commitdiff