Add a couple of random comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111592 91177308-0d34-0410-b5e6-96231b3b80d8

If the target says that an extending load is not legal, regardless of whether
it involves specific floating-point types, legalize should expand an
extending load to a non-extending load followed by a separate extend operation.
For example, we currently expand SEXTLOAD to EXTLOAD+SIGN_EXTEND_INREG (and
assert that EXTLOAD should always be supported).  Now we can expand that to
LOAD+SIGN_EXTEND.  This is needed to allow vector SIGN_EXTEND and ZERO_EXTEND
to be used for NEON.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111586 91177308-0d34-0410-b5e6-96231b3b80d8

Better handling of offsets on frame index references. rdar://8277890

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111585 91177308-0d34-0410-b5e6-96231b3b80d8

CrashRecovery/Darwin: On Darwin, raise sends a signal to the main thread instead
of the current thread. This has the unfortunate effect that assert() and abort()
will end up bypassing our crash recovery attempts. We work around this for
anything in the same linkage unit by just defining our own versions of the
assert handler and abort.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111583 91177308-0d34-0410-b5e6-96231b3b80d8

Previous revert failed to remove this file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111582 91177308-0d34-0410-b5e6-96231b3b80d8

Update comment to remove special case for vector extending loads.  An
extending vector load should extend each element in the same way as the
corresponding scalar extending load.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111577 91177308-0d34-0410-b5e6-96231b3b80d8

Update debug logs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111575 91177308-0d34-0410-b5e6-96231b3b80d8

Properly update MachineDominators when splitting critical edge.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111574 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r111568 to unbreak clang self-host.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111571 91177308-0d34-0410-b5e6-96231b3b80d8

When a set of bitmask operations, typically from a bitfield initialization, only modifies the low bytes of a value,
we can narrow the store to only over-write the affected bytes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111568 91177308-0d34-0410-b5e6-96231b3b80d8

llvmc: Update examples.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111553 91177308-0d34-0410-b5e6-96231b3b80d8

Trailing whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111552 91177308-0d34-0410-b5e6-96231b3b80d8

Disable LVI while I evaluate a failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111551 91177308-0d34-0410-b5e6-96231b3b80d8

Tentatively enabled LVI by default.  I'll be monitoring for any failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111543 91177308-0d34-0410-b5e6-96231b3b80d8

Correct header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111540 91177308-0d34-0410-b5e6-96231b3b80d8

Silence 'unused' warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111539 91177308-0d34-0410-b5e6-96231b3b80d8

It's possible to sink a def if its local uses are PHI's.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111537 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the msvc 2010 build.

The Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.30319.01
implements parts of C++0x based on the draft standard. An old version of
the draft had a bug that makes std::pair<T1*, T2*>(something, 0) fail to
compile. This is because the template<class U, class V> pair(U&& x, V&& y)
constructor is selected, even though it later fails to implicitly convert
U and V to frist_type and second_type.

This has been fixed in n3090, but it seems that Microsoft is not going to
update msvc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111535 91177308-0d34-0410-b5e6-96231b3b80d8

Do not assert when reading an exponent out of range.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111534 91177308-0d34-0410-b5e6-96231b3b80d8

Add Thumb1 support for virtual frame indices.

rdar://8277890

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111533 91177308-0d34-0410-b5e6-96231b3b80d8

Remove disabled assertion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111531 91177308-0d34-0410-b5e6-96231b3b80d8

Teach machine-sink to break critical edges when appropriate. Work in progress.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111530 91177308-0d34-0410-b5e6-96231b3b80d8

buildbot/valgrind: Update RegisterPass false positive suppression for API
changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111529 91177308-0d34-0410-b5e6-96231b3b80d8

buildbot/valgrind: Suppress warnings about leaks in /bin/grep.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111528 91177308-0d34-0410-b5e6-96231b3b80d8

Re-re-revert this patch.  It seems to be causing performance
and correctness regressions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111527 91177308-0d34-0410-b5e6-96231b3b80d8

tests: Haste makes waste.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111525 91177308-0d34-0410-b5e6-96231b3b80d8

tests: Ignore whitespace in llvm_supports_binding() and llvm_gcc_supports().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111524 91177308-0d34-0410-b5e6-96231b3b80d8

Silence warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111518 91177308-0d34-0410-b5e6-96231b3b80d8

MCELF: Count the section orders properly. Patch by Roman Divacky.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111517 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed and reactivated a partial specialization test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111516 91177308-0d34-0410-b5e6-96231b3b80d8

Use std::string instead of StringRef in ClangAttrEmitter.cpp; per report on
cfe-dev, fixes an error compiling with MSVC.  Using a StringRef here doesn't
look safe in any case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111513 91177308-0d34-0410-b5e6-96231b3b80d8

Update local stack block allocation to let PEI do the allocs if no additional
base registers were required. This will allow for slightly better packing
of the locals when alignment padding is necessary after callee saved registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111508 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r111199; it breaks -debug-pass=Structure output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111500 91177308-0d34-0410-b5e6-96231b3b80d8

Reapply the virtual register patch from 109102. The places where we were
depending on the number of virtual registers appear to have all been handled
now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111499 91177308-0d34-0410-b5e6-96231b3b80d8

fix PR7465, mishandling of lcall and ljmp: intersegment long
call and jumps.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111496 91177308-0d34-0410-b5e6-96231b3b80d8

Process the step before the start, because it's usually the simpler
of the two.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111495 91177308-0d34-0410-b5e6-96231b3b80d8

minor progress towards fixing PR7465

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111494 91177308-0d34-0410-b5e6-96231b3b80d8

Add an AddOptionalDefs method and use it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111489 91177308-0d34-0410-b5e6-96231b3b80d8

lit/GoogleTest: Add .exe to the suffix when looking for tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111487 91177308-0d34-0410-b5e6-96231b3b80d8

Add include missing for VC build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111484 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase for llvm-gcc checkin 111482.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111483 91177308-0d34-0410-b5e6-96231b3b80d8

Add the "isCompare" attribute to the defm instead of each individual instr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111481 91177308-0d34-0410-b5e6-96231b3b80d8

Remove three spurious semicolons

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111480 91177308-0d34-0410-b5e6-96231b3b80d8

Don't call Predicate_* in Mips.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111468 91177308-0d34-0410-b5e6-96231b3b80d8

Remove extra header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111456 91177308-0d34-0410-b5e6-96231b3b80d8

Finish full attribute class emission for clang.

For more information, see the accompanying clang patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111454 91177308-0d34-0410-b5e6-96231b3b80d8

Add a newline to debug output

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111453 91177308-0d34-0410-b5e6-96231b3b80d8

refix PR1143 by making basicaa analyze zexts of indices aggresively,
which I broke with a recent patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111452 91177308-0d34-0410-b5e6-96231b3b80d8

If any def of a machine-sink candidate has local uses, it's obviously not safe to sink it to a successor block. This bug has been hidden because a later check for critical-edge disable these illegal optimizations. This patch should significantly reduce the amount of time spent on checking dominator information for obviously unsafe sinking.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111450 91177308-0d34-0410-b5e6-96231b3b80d8

GetLinearExpression is only called when TD is non-null, pass as
a reference instead of pointer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111445 91177308-0d34-0410-b5e6-96231b3b80d8

rework GEP decomposition to make a new VariableGEPIndex struct instead of
using a pair.  This tidies up the code a bit.  While setting things up, add
a (currently unused) field to keep track of how the value is extended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111444 91177308-0d34-0410-b5e6-96231b3b80d8

Enable ARM base register reuse to local stack slot allocation. Whenever a new
frame index reference to an object in the local block is seen, check if
it's near enough to any previously allocaated base register to re-use.

rdar://8277890

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111443 91177308-0d34-0410-b5e6-96231b3b80d8

Add a testcase to verify that commands don't crash when they hit
errors on stderr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111440 91177308-0d34-0410-b5e6-96231b3b80d8

Make raw_fd_ostream consider itself the owner of STDOUT_FILENO when
constructed with an output filename of "-". In particular, allow the
file descriptor to be closed, and close the file descriptor in the
destructor if it hasn't been explicitly closed already, to ensure
that any write errors are detected.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111436 91177308-0d34-0410-b5e6-96231b3b80d8

When sending stats output to stdout for grepping, don't emit normal
output to standard output also.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111435 91177308-0d34-0410-b5e6-96231b3b80d8

move gep decomposition out of ValueTracking into BasicAA.  The form of
decomposition that it is doing is very basicaa specific and is only used
by basicaa.

Now with less tree breakingness.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111433 91177308-0d34-0410-b5e6-96231b3b80d8

Tidy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111432 91177308-0d34-0410-b5e6-96231b3b80d8

Minor simplification. Gets rid of a needless temporary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111430 91177308-0d34-0410-b5e6-96231b3b80d8

Use ConstantRange to propagate information through value definitions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111425 91177308-0d34-0410-b5e6-96231b3b80d8

When sending stats output to stdout for grepping, don't emit normal
output to standard output also.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111401 91177308-0d34-0410-b5e6-96231b3b80d8

Thinking about it, we don't need MachineDominatorTree after all. The DomValue
map discovers the iterated dominance frontier for free.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111400 91177308-0d34-0410-b5e6-96231b3b80d8

Introduce a ScopedFatalErrorHandler class to make it easy to register
fatal error handlers which automatically get unregistered at the end
of a scope.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111398 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r111394. It was too aggressive.

We must complete the DFS, otherwise we might miss needed phi-defs, and
prematurely color live ranges with a non-dominating value.

This is not a big deal since we get to color more of the CFG and the next
mapValue call will be faster.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111397 91177308-0d34-0410-b5e6-96231b3b80d8

Aggressively prune the DFS when inserting phi-defs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111394 91177308-0d34-0410-b5e6-96231b3b80d8

Add the LiveIntervalMap class. Don't hook it up yet.

LiveIntervalMap maps values from a parent LiveInterval to a child interval that
is a strict subset. It will create phi-def values as needed to preserve the
VNInfo SSA form in the child interval.

This leads to an algorithm very similar to the one in SSAUpdaterImpl.h, but with
enough differences that the code can't be reused:

- We don't need to manipulate PHI instructions.
- LiveIntervals have kills.
- We have MachineDominatorTree.
- We can use df_iterator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111393 91177308-0d34-0410-b5e6-96231b3b80d8

Add df_iterator::getPathLength and getPath as a way of getting a path from the
entry node to the current node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111392 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r111375, "move gep decomposition out of ValueTracking into BasicAA.  The
form of", it doesn't pass tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111385 91177308-0d34-0410-b5e6-96231b3b80d8

Improve whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111384 91177308-0d34-0410-b5e6-96231b3b80d8

Marked with ATTRIBUTE_USED so that clang doesn't complain.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111383 91177308-0d34-0410-b5e6-96231b3b80d8

Inform LazyValueInfo whenever a block is deleted, to avoid dangling pointer issues.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111382 91177308-0d34-0410-b5e6-96231b3b80d8

MC/ELF: Allow null values in virtual sections, ELF doesn't use special
directives for putting contents in .bss, for example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111376 91177308-0d34-0410-b5e6-96231b3b80d8

move gep decomposition out of ValueTracking into BasicAA.  The form of
decomposition that it is doing is very basicaa specific and is only used
by basicaa.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111375 91177308-0d34-0410-b5e6-96231b3b80d8

Add hook for re-using virtual base registers for local stack slot access.
Nothing fancy, just ask the target if any currently available base reg
is in range for the instruction under consideration and use the first one
that is. Placeholder ARM implementation simply returns false for now.

ongoing saga of rdar://8277890

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111374 91177308-0d34-0410-b5e6-96231b3b80d8

Eliminate some redundancy by relying on raw_fd_ostream to handle "-"
properly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111373 91177308-0d34-0410-b5e6-96231b3b80d8

Allow the -analyze option to follow the -o option, which defaults to
standard output, instead of just hardcoding outs().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111372 91177308-0d34-0410-b5e6-96231b3b80d8

Don't translate "-" to outs() manually; raw_ostream does that automatically.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111371 91177308-0d34-0410-b5e6-96231b3b80d8

Don't translate "-" to outs() manually; raw_ostream does that
automatically.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111370 91177308-0d34-0410-b5e6-96231b3b80d8

Don't register stdout to be deleted on a signal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111368 91177308-0d34-0410-b5e6-96231b3b80d8

Remove an unused command-line option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111367 91177308-0d34-0410-b5e6-96231b3b80d8

Preserve subregs on PHI source operands. Patch by Krister Wombell!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111366 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug with insertelement on SPU.
The previous algorithm in LowerVECTOR_SHUFFLE
didn't check all requirements for "monotonic" shuffles.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111361 91177308-0d34-0410-b5e6-96231b3b80d8

Remove all traces of v2[i,f]32 on SPU.

The "half vectors" are now widened to full size by the legalizer.
The only exception is in parameter passing, where half vectors are
expanded. This causes changes to some dejagnu tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111360 91177308-0d34-0410-b5e6-96231b3b80d8

Change SPU C calling convention to match that described in
"SPU Application Binary Interface Specification, v1.9" by
IBM.
Specifically: use r3-r74 to pass parameters and the return value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111358 91177308-0d34-0410-b5e6-96231b3b80d8

fix a buggy test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111354 91177308-0d34-0410-b5e6-96231b3b80d8

fix PR7589: In brief:
  gep P, (zext x) != gep P, (sext x)

DecomposeGEPExpression was getting this wrong, confusing
basicaa.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111352 91177308-0d34-0410-b5e6-96231b3b80d8

filecheckize and detrivialize.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111350 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR7755: knowing something about an inval for a pred
from the LHS should disable reconsidering that pred on the
RHS.  However, knowing something about the pred on the RHS
shouldn't disable subsequent additions on the RHS from
happening.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111349 91177308-0d34-0410-b5e6-96231b3b80d8

fit in 80 cols

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111348 91177308-0d34-0410-b5e6-96231b3b80d8

remove some dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111345 91177308-0d34-0410-b5e6-96231b3b80d8

remove some dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111344 91177308-0d34-0410-b5e6-96231b3b80d8

remove some code that is dead now that lea's are modeled with segment registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111343 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead prototype.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111342 91177308-0d34-0410-b5e6-96231b3b80d8

Expand ZERO_EXTEND operations for NEON vector types.
Testcase from Nick Lewycky.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111341 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the "Finished Creating" messages for aliases to print the
right name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111340 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r111321. This doesn't fix a problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111339 91177308-0d34-0410-b5e6-96231b3b80d8

stomp some more undefined behavior, PR7775.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111337 91177308-0d34-0410-b5e6-96231b3b80d8

don't emit zero bit fields with Emit, fixing undefined behavior,
PR7778

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111336 91177308-0d34-0410-b5e6-96231b3b80d8

Don't pass in a null pointer to std::string's ctor, an empty string
ref should produce an empty std::string.  This fixes PR7879.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111332 91177308-0d34-0410-b5e6-96231b3b80d8

fix a broken link

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111326 91177308-0d34-0410-b5e6-96231b3b80d8

include config.h to get config params, hopefully unbreaking mingw builder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111325 91177308-0d34-0410-b5e6-96231b3b80d8