Sanjay Patel 89305e5345 Don't prevent a vselect of constants from becoming a single load (PR20648). ...

Fix for PR20648 - http://llvm.org/bugs/show_bug.cgi?id=20648

This patch checks the operands of a vselect to see if all values are constants.
If yes, bail out of any further attempts to create a blend or shuffle because
SelectionDAGLegalize knows how to turn this kind of vselect into a single load.

This already happens for machines without SSE4.1, so the added checks just send
more targets down that path.

Differential Revision: http://reviews.llvm.org/D4934


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216121 91177308-0d34-0410-b5e6-96231b3b80d8

2014-08-20 20:34:56 +00:00

..

Analysis

Answer to Philip Reames comments

2014-08-18 22:18:14 +00:00

AsmParser

Split parseAssembly into parseAssembly and parseAssemblyInto.

2014-08-19 22:05:47 +00:00

Bitcode

BitcodeReader: Only create one basic block for each blockaddress

2014-08-16 01:54:37 +00:00

CodeGen

Fix null reference creation in ScheduleDAGInstrs constructor call.

2014-08-20 19:36:05 +00:00

DebugInfo

Don't own the buffer in object::Binary.

2014-08-19 18:44:46 +00:00

ExecutionEngine

[MCJIT] Allow '$' characters in symbol names in RuntimeDyldChecker.

2014-08-19 20:04:45 +00:00

IR

IR: Implement uselistorder assembly directives

2014-08-19 21:30:15 +00:00

IRReader

Modernize the .ll parsing interface.

2014-08-19 16:58:54 +00:00

LineEditor

[CMake] Use LINK_LIBS instead of target_link_libraries().

2014-02-26 06:41:29 +00:00

Linker

Set comdats when lazily linking functions.

2014-08-15 20:17:08 +00:00

LTO

Silencing a -Wcast-qual warning. NFC.

2014-08-20 12:54:13 +00:00

MC

Remove unused field.

2014-08-20 17:33:44 +00:00

Object

Fix a pair of use after free. Should bring the bots back.

2014-08-19 18:59:14 +00:00

Option

[Option] Support MultiArg in --help

2014-08-15 21:35:07 +00:00

ProfileData

Don't own the buffer in object::Binary.

2014-08-19 18:44:46 +00:00

Support

Fix undefined behavior (left shift by 64 bits) in ScaledNumber::toString().

2014-08-20 18:30:07 +00:00

TableGen

Canonicalize header guards into a common format.

2014-08-13 16:26:38 +00:00

Target

Don't prevent a vselect of constants from becoming a single load (PR20648).

2014-08-20 20:34:56 +00:00

Transforms

InstCombine: Annotate sub with nuw when we prove it's safe

2014-08-20 07:17:31 +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