Chad Rosier a73b6fc511 Add x86-specific DAG combine to simplify: ...

x == -y --> x+y == 0
 x != -y --> x+y != 0

On x86, the generated code goes from
   negl    %esi
   cmpl    %esi, %edi
   je    .LBB0_2
to
   addl    %esi, %edi
   je    .L4

This case is correctly handled for ARM with "cmn".

Patch by Manman Ren.
rdar://11245199
PR12545


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155739 91177308-0d34-0410-b5e6-96231b3b80d8

2012-04-27 22:33:25 +00:00

..

Analysis

Reapply r155682, making constant folding more consistent, with a fix to work

2012-04-27 17:50:22 +00:00

Archive

Include cstdio in a few place that depended on getting it transitively through StringExtras.h

2012-03-23 11:35:30 +00:00

AsmParser

Convert assert(0) to llvm_unreachable

2012-02-07 05:05:23 +00:00

Bitcode

llvm::SwitchInst

2012-03-11 06:09:17 +00:00

CodeGen

Fix the SD scheduler to avoid gluing the same node twice.

2012-04-26 21:48:25 +00:00

DebugInfo

Fix a C++11 UDL conflict.

2012-04-04 20:33:56 +00:00

ExecutionEngine

Fix incorrect call of resolveRelocation() for ARM ELF stub relocations.

2012-04-17 20:10:16 +00:00

Linker

Add a flag to the struct type finder to collect only those types which have

2012-04-21 23:59:16 +00:00

MC

MC assembly parser handling for trailing comma in macro instantiation.

2012-04-16 21:18:49 +00:00

Object

Implement GDB integration for source level debugging of code JITed using

2012-04-16 22:12:58 +00:00

Support

[Support/YAMLParser] Fix ASan found bugs.

2012-04-27 21:12:20 +00:00

TableGen

Fix copy/paste-o.

2012-04-18 18:09:53 +00:00

Target

Add x86-specific DAG combine to simplify:

2012-04-27 22:33:25 +00:00

Transforms

Don't vectorize target-specific types (ppc_fp128, x86_fp80, etc.).

2012-04-27 19:34:00 +00:00

VMCore

Reapply r155682, making constant folding more consistent, with a fix to work

2012-04-27 17:50:22 +00:00

CMakeLists.txt

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LLVMBuild.txt

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Makefile

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