Benjamin Kramer e7cf062537 DAGCombine: fold "(zext x) == C" into "x == (trunc C)" if the trunc is lossless. ...

On x86 this allows to fold a load into the cmp, greatly reducing register pressure.
  movzbl	(%rdi), %eax
  cmpl	$47, %eax
->
  cmpb	$47, (%rdi)

This shaves 8k off gcc.o on i386. I'll leave applying the patch in README.txt to Chris :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130005 91177308-0d34-0410-b5e6-96231b3b80d8

2011-04-22 18:47:44 +00:00

..

Analysis

PR9214: Convert Metadata API to use ArrayRef.

2011-04-21 19:59:31 +00:00

Archive

Revert PathV2 changes, as sys::fs::unique_file is not finished yet.

2011-03-01 19:50:55 +00:00

AsmParser

PR9214: Convert Metadata API to use ArrayRef.

2011-04-21 19:59:31 +00:00

Bitcode

PR9214: Convert Metadata API to use ArrayRef.

2011-04-21 19:59:31 +00:00

CodeGen

DAGCombine: fold "(zext x) == C" into "x == (trunc C)" if the trunc is lossless.

2011-04-22 18:47:44 +00:00

CompilerDriver

Build CompilerDriver library.

2011-03-12 22:01:42 +00:00

ExecutionEngine

80-col fix.

2011-04-22 03:07:06 +00:00

Linker

Set the unnamed_addr only when we're creating a new GV in the dest module.

2011-03-29 23:31:06 +00:00

MC

Delete the other unused variable in this function. Sorry I missed this

2011-04-22 01:29:18 +00:00

Object

Use enums for constant values.

2011-04-22 06:34:01 +00:00

Support

Add support for 64-bit object files to Path.

2011-04-22 03:50:19 +00:00

Target

DAGCombine: fold "(zext x) == C" into "x == (trunc C)" if the trunc is lossless.

2011-04-22 18:47:44 +00:00

Transforms

PR9214: Convert Metadata API to use ArrayRef.

2011-04-21 19:59:31 +00:00

VMCore

PR9214: Convert Metadata API to use ArrayRef.

2011-04-21 19:59:31 +00:00

CMakeLists.txt

Build CompilerDriver library.

2011-03-12 22:01:42 +00:00

Makefile

…