Chandler Carruth f91161874e [x86] Teach the X86 backend to DAG-combine SSE2 shuffles that are ...

trivially redundant.

This fixes several cases in the new vector shuffle lowering algorithm
which would generate redundant shuffle instructions for the sake of
simplicity.

I'm also deleting a testcase which was somewhat ridiculous. It was
checking for a bug in 2007 about incorrectly transforming shuffles by
looking for the string "-86" in the output of a pretty substantial
function. This test case doesn't seem to have any value at this point.

Differential Revision: http://reviews.llvm.org/D4240

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211889 91177308-0d34-0410-b5e6-96231b3b80d8

2014-06-27 11:27:52 +00:00

..

Analysis

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

AsmParser

ParseIR: don't take ownership of the MemoryBuffer

2014-06-27 04:33:58 +00:00

Bitcode

IRReader: don't mark MemoryBuffers const

2014-06-27 09:19:14 +00:00

CodeGen

Revert "Revert "Revert "PR20038: DebugInfo: Inlined call sites where the caller has debug info but the call itself has no debug location."""

2014-06-27 05:34:05 +00:00

DebugInfo

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

ExecutionEngine

[RuntimeDyld, PowerPC] Fix/improve handling of TOC relocations

2014-06-27 10:32:14 +00:00

IR

Revert "Revert "Revert "PR20038: DebugInfo: Inlined call sites where the caller has debug info but the call itself has no debug location."""

2014-06-27 05:34:05 +00:00

IRReader

IRReader: don't mark MemoryBuffers const

2014-06-27 09:19:14 +00:00

LineEditor

…

Linker

Replace some assert(0)'s with llvm_unreachable.

2014-06-18 05:05:13 +00:00

LTO

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

MC

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

Object

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

Option

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

ProfileData

Renaming SwapByteOrder() to getSwappedBytes()

2014-06-14 11:36:01 +00:00

Support

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

TableGen

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

Target

[x86] Teach the X86 backend to DAG-combine SSE2 shuffles that are

2014-06-27 11:27:52 +00:00

Transforms

Added instruction combine to transform few more negative values addition to subtraction (Part 3)

2014-06-27 07:47:35 +00:00

CMakeLists.txt

ProfileData: Introduce the InstrProfReader interface and a text reader

2014-03-21 17:24:48 +00:00

LLVMBuild.txt

ProfileData: Introduce the InstrProfReader interface and a text reader

2014-03-21 17:24:48 +00:00

Makefile

ProfileData: Introduce the InstrProfReader interface and a text reader

2014-03-21 17:24:48 +00:00