Fix PR3701. 1. X86 target renamed eflags register to flags. This matches what llvm-gcc generates so codegen knows flags register is being clobbered by inline asm. 2. BURR scheduler should also check if inline asm nodes can clobber "live" physical registers. Previously it was only checking target nodes with implicit defs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65996 91177308-0d34-0410-b5e6-96231b3b80d8

If a global constant is dead then global's debug info should not prevent the optimizer in deleting the global. And while deleting global, delete global's debug info also.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65994 91177308-0d34-0410-b5e6-96231b3b80d8

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