Make my earlier patch to skip debug intrinsics
when counting work; it was only off by 1.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65993 91177308-0d34-0410-b5e6-96231b3b80d8

Temporarily revert 65975, which breaks the llvm-gcc build.
While the patch is clearly correct in itself, it's become
apparent other places are assuming debug intrinsics are
marked as touching memory...this needs more testing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65992 91177308-0d34-0410-b5e6-96231b3b80d8

The DAG combiner was performing a BT combine. The BT combine had a value of -1,
so it changed it into a 31 via the TLO.ShrinkDemandedConstant() call. Then it
would go through the DAG combiner again. This time it had a value of 31, which
was turned into a -1 by TLI.SimplifyDemandedBits(). This would ping pong
forever.

Teach the TLO.ShrinkDemandedConstant() call not to lower a value if the demanded
value is an XOR of all ones.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65985 91177308-0d34-0410-b5e6-96231b3b80d8

Marking debug info intrinsics as not touching memory
caused them to be considered trivially dead.  Fix this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65979 91177308-0d34-0410-b5e6-96231b3b80d8

Instruction counters must skip the bitcasts that
feed into llvm.dbg.declare nodes, as well as
the debug directives themselves.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65976 91177308-0d34-0410-b5e6-96231b3b80d8

Dbg Intrinsics do not access memory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65975 91177308-0d34-0410-b5e6-96231b3b80d8

Recursively remove dead argument while removing llvm.dbg.declare intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65971 91177308-0d34-0410-b5e6-96231b3b80d8

When removing a store to an alloca that has only one
use, check also for the case where it has two uses,
the other being a llvm.dbg.declare.  This is needed so
debug info doesn't affect codegen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65970 91177308-0d34-0410-b5e6-96231b3b80d8

don't #include a header into the middle of an anon namespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65967 91177308-0d34-0410-b5e6-96231b3b80d8

Add '(implicit EFLAGS)' for AND, OR, XOR, NEG, INC, and DEC
instructions. These aren't used yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65965 91177308-0d34-0410-b5e6-96231b3b80d8

Use early exit to reduce indentation.  No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65962 91177308-0d34-0410-b5e6-96231b3b80d8

Remove accidental check-ins in r65960. :-(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65961 91177308-0d34-0410-b5e6-96231b3b80d8

Use > instead of >=. We want to promote aggregates of 128-bytes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65960 91177308-0d34-0410-b5e6-96231b3b80d8

Make a comment less terse.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65953 91177308-0d34-0410-b5e6-96231b3b80d8

Reapply r65755, but reversing "<" to ">=".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65945 91177308-0d34-0410-b5e6-96231b3b80d8

Add example/Skeleton.

This is a template that can be used to build your own LLVMC-based drivers.
It can be also useful as a "bare-bones" LLVMC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65944 91177308-0d34-0410-b5e6-96231b3b80d8

Comment fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65943 91177308-0d34-0410-b5e6-96231b3b80d8

Oops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65942 91177308-0d34-0410-b5e6-96231b3b80d8

Use LLVMLIBS instead of USEDLIBS.

Since this Makefile is supposed to be usable from LLVM-based projects not in the
tree, LLVMLIBS should be used instead of USEDLIBS. This depends on my previous
fix to Makefile.rules.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65941 91177308-0d34-0410-b5e6-96231b3b80d8

LINK_COMPONENTS should be added to LLVMLibsOptions.

From the code: "There are "Proj" libs (defined by the user's project) and "LLVM"
libs (defined by the LLVM project)." LINK_COMPONENTS are clearly defined by the
LLVM project.

Additionally, this fixes an issue with llvmc's build process:-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65940 91177308-0d34-0410-b5e6-96231b3b80d8

Move example plugins to the example/ directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65939 91177308-0d34-0410-b5e6-96231b3b80d8

ENABLE_PIC is either 0 or 1, but is always defined.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65938 91177308-0d34-0410-b5e6-96231b3b80d8

80-column violation + trailing whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65936 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore the debug info intrinsics when adding instructions into alias sets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65934 91177308-0d34-0410-b5e6-96231b3b80d8

This bug's been fixed but a version with the fix hasn't been released yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65931 91177308-0d34-0410-b5e6-96231b3b80d8

Regenerate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65928 91177308-0d34-0410-b5e6-96231b3b80d8

Switch to using -Wl,-R on Solaris.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65927 91177308-0d34-0410-b5e6-96231b3b80d8

Fix build on Cygwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65922 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bunch of Doxygen syntax issues. Escape special characters,
and put @file directives on their own comment line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65920 91177308-0d34-0410-b5e6-96231b3b80d8

Don't count DebugInfo instructions in another limit
(lest they affect codegen).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65915 91177308-0d34-0410-b5e6-96231b3b80d8

Testcase for line number sinking in InstCombine.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65911 91177308-0d34-0410-b5e6-96231b3b80d8

When sinking an insn in InstCombine bring its debug
info with it.
Don't count debug info insns against the scan maximum
in FindAvailableLoadedValue (lest they affect codegen).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65910 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore debug info intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65908 91177308-0d34-0410-b5e6-96231b3b80d8

If branch conditions' one successor is dominating another non-latch successor then this loop's iteration space can not be restricted. In this example block bb5 is always executed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65902 91177308-0d34-0410-b5e6-96231b3b80d8

Generalize BuildVectorSDNode::isConstantSplat to use APInts and handle
arbitrary vector sizes.  Add an optional MinSplatBits parameter to specify
a minimum for the splat element size.  Update the PPC target to use the
revised interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65899 91177308-0d34-0410-b5e6-96231b3b80d8

Document the -gcc-tool-args bugpoint option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65897 91177308-0d34-0410-b5e6-96231b3b80d8

Add a "-gcc-tool-args" option. This option acts like the "-tool-args" option,
but passes the arguments to the "gcc" invocation instead of to the "llc"
invocation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65896 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the calculation for how big the allocated stub needs to be.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65895 91177308-0d34-0410-b5e6-96231b3b80d8

Remove all dbg symobls, including those with circular references.

This is ugly, but I can't figure out a quick way out of this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65889 91177308-0d34-0410-b5e6-96231b3b80d8

Fix main executable path name resolution on FreeBSD, patch by
Ed Schouten!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65882 91177308-0d34-0410-b5e6-96231b3b80d8

Add some more clang related release notes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65868 91177308-0d34-0410-b5e6-96231b3b80d8

drop support for GCC 2.x as it is hopelessly broken anyway

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65864 91177308-0d34-0410-b5e6-96231b3b80d8

Remove incorrect information about fortran on Darwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65859 91177308-0d34-0410-b5e6-96231b3b80d8

fix broken GCC bugzilla link

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65858 91177308-0d34-0410-b5e6-96231b3b80d8

add a Q/A on broken GCCs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65857 91177308-0d34-0410-b5e6-96231b3b80d8

update blurb per Shannon Weyrick.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65856 91177308-0d34-0410-b5e6-96231b3b80d8

Try to make the meaning of 'nocapture' a bit clearer.  I
commented out the line about simplifylibcalls because I
think this doesn't work in the release (it was fixed in
svn after the release branched).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65846 91177308-0d34-0410-b5e6-96231b3b80d8

Use GCC not gcc, like everywhere else in this document.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65845 91177308-0d34-0410-b5e6-96231b3b80d8

Grammar and punctuation fixes.
No content changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65844 91177308-0d34-0410-b5e6-96231b3b80d8

Declare Sentinel fragments as mutable to get rid
of some pointless casting. This fragment logically
does not belong to ilist anyway, but to "ghostly"
NodeType.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65843 91177308-0d34-0410-b5e6-96231b3b80d8

remove a deprecated interface that was pretty useless

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65842 91177308-0d34-0410-b5e6-96231b3b80d8

note the removal of deprecated interfaces

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65841 91177308-0d34-0410-b5e6-96231b3b80d8

fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65839 91177308-0d34-0410-b5e6-96231b3b80d8

minor tweaks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65838 91177308-0d34-0410-b5e6-96231b3b80d8

minor tweaks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65837 91177308-0d34-0410-b5e6-96231b3b80d8

Remove duplication in Makefile.rules.

Merge common bits from the LLVMC and TABLEGEN sections.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65834 91177308-0d34-0410-b5e6-96231b3b80d8

Add more notes for VMKit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65833 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR3694: add an instcombine micro-optimization that helps
clean up when using variable length arrays in llvm-gcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65832 91177308-0d34-0410-b5e6-96231b3b80d8

Move the rules for building plugins to Makefile.rules.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65827 91177308-0d34-0410-b5e6-96231b3b80d8

Fix build with objdir != srcdir.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65826 91177308-0d34-0410-b5e6-96231b3b80d8

Move code from Main.cpp to the include dir.

User drivers based on llvmc must all share the initialization code.
Putting main() into libCompilerDriver is not a very good idea IMO (and ld gave
me some strange EH-related error anyway).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65825 91177308-0d34-0410-b5e6-96231b3b80d8

Cosmetic fixes: include guards.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65824 91177308-0d34-0410-b5e6-96231b3b80d8

Plugin::Priority() doesn't need to be pure virtual.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65823 91177308-0d34-0410-b5e6-96231b3b80d8

Add a comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65822 91177308-0d34-0410-b5e6-96231b3b80d8

Reorganize llvmc code.

Move the code from 'llvmc/driver' into a new CompilerDriver library, and change
the build system accordingly. Makes it easier for projects using LLVM to build
their own llvmc-based drivers.

Tested with objdir != srcdir.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65821 91177308-0d34-0410-b5e6-96231b3b80d8

Random formatting changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65815 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typos.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65813 91177308-0d34-0410-b5e6-96231b3b80d8

Change </pp> to </p>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65804 91177308-0d34-0410-b5e6-96231b3b80d8

- Use "real-world applications" instead of just "real applications".
- Verification Fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65803 91177308-0d34-0410-b5e6-96231b3b80d8

Make some improvements to the GC docs.

Also, drop reference to the half-baked runtime interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65802 91177308-0d34-0410-b5e6-96231b3b80d8

Drop toy GC runtime.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65801 91177308-0d34-0410-b5e6-96231b3b80d8

remove empty section

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65800 91177308-0d34-0410-b5e6-96231b3b80d8

more englishification

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65799 91177308-0d34-0410-b5e6-96231b3b80d8

start translating this into Engrish and organizing it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65797 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a problem with DAGCombine on 64b targets where folding
extracts + build_vector into a shuffle would fail, because the
type of the new build_vector would not be legal.  Try harder to
create a legal build_vector type.  Note: this will be totally
irrelevant once vector_shuffle no longer takes a build_vector for
shuffle mask.

New:
_foo:
xorps %xmm0, %xmm0
xorps %xmm1, %xmm1
subps %xmm1, %xmm1
mulps %xmm0, %xmm1
addps %xmm0, %xmm1
movaps %xmm1, 0

Old:
_foo:
xorps %xmm0, %xmm0
movss %xmm0, %xmm1
xorps %xmm2, %xmm2
unpcklps %xmm1, %xmm2
pshufd $80, %xmm1, %xmm1
unpcklps %xmm1, %xmm2
pslldq $16, %xmm2
pshufd $57, %xmm2, %xmm1
subps %xmm0, %xmm1
mulps %xmm0, %xmm1
addps %xmm0, %xmm1
movaps %xmm1, 0

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65791 91177308-0d34-0410-b5e6-96231b3b80d8

move gold plugin next to LTO doc in the subsystem section

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65790 91177308-0d34-0410-b5e6-96231b3b80d8

Add a quickstart example.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65789 91177308-0d34-0410-b5e6-96231b3b80d8

Close list item tag, to conform with the style in this file. It's optional
anyways.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65787 91177308-0d34-0410-b5e6-96231b3b80d8

Add the gold plugin page to the documentation index!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65786 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup the description of flags to llvm-gcc. Also remove stray text in the
attribution.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65785 91177308-0d34-0410-b5e6-96231b3b80d8

Don't forget the important part. llvm-gcc -use-gold-plugin passes the right
options to gold.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65783 91177308-0d34-0410-b5e6-96231b3b80d8

Sprinkle llvmc notes with <tt>.

Also removes some trailing whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65781 91177308-0d34-0410-b5e6-96231b3b80d8

Another sentinel optimization. This one should always
be a win, since almost every interesting function has at least one Argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65778 91177308-0d34-0410-b5e6-96231b3b80d8

Reuse a technique (pioneered for BasicBlocks) of superposing ilist with
its sentinel. This is quite a win when a function really has a basic block.
When the function is just a declaration (and stays so) the old way did not
allocate a sentinel. So this change is most beneficial when the ratio of
function definition to declaration is high. I.e. linkers etc. Incidentally
these are the most resource demanding applications, so I expect that the
reduced malloc traffic, locality and space savings outweigh the cost of
addition of two pointers to Function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65776 91177308-0d34-0410-b5e6-96231b3b80d8

Functions marked malloc are noalias return.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65775 91177308-0d34-0410-b5e6-96231b3b80d8

Tweak this a bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65772 91177308-0d34-0410-b5e6-96231b3b80d8

Adjust this test for recent llvm-gcc changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65771 91177308-0d34-0410-b5e6-96231b3b80d8

Fix grammar.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65769 91177308-0d34-0410-b5e6-96231b3b80d8

fix a comment

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65768 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo. Thanks baldrick!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65767 91177308-0d34-0410-b5e6-96231b3b80d8

First pass at a document describing how to achieve LTO on Linux with gold.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65766 91177308-0d34-0410-b5e6-96231b3b80d8

Another point to mention.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65765 91177308-0d34-0410-b5e6-96231b3b80d8

Temporarily revert r65755. It was causing failures in the self-hosting
testsuite:

Running /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/dg.exp ...
FAIL: /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/nancvt.ll
Failed with exit(1) at line 2
while running: grep 2147027116 nancvt.ll.tmp | count 3
count: expected 3 lines and got        0.
child process exited abnormally
FAIL: /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/vec_ins_extract.ll
Failed with exit(1) at line 1
while running:  llvm-as < /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/vec_ins_extract.ll |  opt -scalarrepl -instcombine |   llc -march=x86 -mcpu=yonah | not /usr/bin/grep sub.*esp
      subl      $28, %esp
      subl      $28, %esp
child process exited abnormally

And more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65758 91177308-0d34-0410-b5e6-96231b3b80d8

add some llvmc notes from Mikhail

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65756 91177308-0d34-0410-b5e6-96231b3b80d8

hoist the check for alloca size up so that it controls CanConvertToScalar
as well as isSafeAllocaToScalarRepl.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65755 91177308-0d34-0410-b5e6-96231b3b80d8

Minor optimization:

Look for situations like this:
%reg1024<def> = MOV r1
%reg1025<def> = MOV r0
%reg1026<def> = ADD %reg1024, %reg1025
r0            = MOV %reg1026
Commute the ADD to hopefully eliminate an otherwise unavoidable copy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65752 91177308-0d34-0410-b5e6-96231b3b80d8

tweak this to accept asmprinter changes.  I have no way to verify this, hopefully
the buildbot will work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65750 91177308-0d34-0410-b5e6-96231b3b80d8

simplify handling "don't print top level name" processing, so that we get
stuff like %A = type { %A*} instead of an upref.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65748 91177308-0d34-0410-b5e6-96231b3b80d8

Combine PPC's GetConstantBuildVectorBits and isConstantSplat functions to a new
method in a BuildVectorSDNode "pseudo-class".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65747 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a pretty awesome bug that only happened in a strange case with anonymous
types.  This was reading the uint for the keyword after the token was advanced.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65743 91177308-0d34-0410-b5e6-96231b3b80d8