Simon Pilgrim e9bce87a93 [X86][SSE] Attempt to extract vector elements through target shuffles ...

DAGCombiner already supports peeking thorough shuffles to improve vector element extraction, but legalization often leaves us in situations where we need to extract vector elements after shuffles have already been lowered.

This patch adds support for VECTOR_EXTRACT_ELEMENT/PEXTRW/PEXTRB instructions to attempt to handle target shuffles as well. I've covered some basic scenarios including handling shuffle mask scaling and the implicit zero-extension of PEXTRW/PEXTRB, there is more that could be done here (that I've mentioned in TODOs) but I haven't found many cases where its worth it.

Differential Revision: https://reviews.llvm.org/D30176

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296381 91177308-0d34-0410-b5e6-96231b3b80d8

2017-02-27 21:01:57 +00:00

..

AArch64

[DAGCombine] Fix for a load combine bug with non-zero offset patterns on BE targets

2017-02-27 13:04:23 +00:00

AMDGPU

AMDGPU: Support inlineasm for packed instructions

2017-02-27 20:52:10 +00:00

ARM

[DAGCombine] Fix for a load combine bug with non-zero offset patterns on BE targets

2017-02-27 13:04:23 +00:00

AVR

[AVR] Disable integrated assembler for a few tests

2017-02-22 22:41:13 +00:00

BPF

Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."

2017-02-26 01:27:32 +00:00

Generic

Remove an empty line in icmp-illegal.ll . NFC

2017-02-27 16:09:44 +00:00

Hexagon

[Hexagon] Undo shift folding where it could simplify addressing mode

2017-02-24 23:34:24 +00:00

Inputs

[PR27284] Reverse the ownership between DICompileUnit and DISubprogram.

2016-04-15 15:57:41 +00:00

Lanai

[lanai] Simplify small section check in LowerGlobalAddress and treat ldata sections specially.

2016-12-15 16:56:16 +00:00

Mips

Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."

2017-02-26 01:27:32 +00:00

MIR

MIRTests: Remove unnecessary 2>&1 redirection

2017-02-22 18:47:41 +00:00

MSP430

Revert "[CGP] Split some critical edges coming out of indirect branches"

2017-02-26 11:09:12 +00:00

NVPTX

[DAGCombiner] add missing folds for scalar select of {-1,0,1}

2017-02-24 17:17:33 +00:00

PowerPC

Do full codegen for various tests. NFC

2017-02-27 01:15:57 +00:00

SPARC

Codegen: Make chains from trellis-shaped CFGs

2017-02-15 19:49:14 +00:00

SystemZ

Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."

2017-02-26 01:27:32 +00:00

Thumb

Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."

2017-02-26 01:27:32 +00:00

Thumb2

[ARM] Replace HasT2ExtractPack with HasDSP

2017-02-17 15:42:44 +00:00

WebAssembly

[WebAssembly] Add support for using a wasm global for the stack pointer.

2017-02-24 23:46:05 +00:00

WinEH

Avoid infinite loops in branch folding

2016-12-12 23:05:38 +00:00

X86

[X86][SSE] Attempt to extract vector elements through target shuffles

2017-02-27 21:01:57 +00:00

XCore

Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."

2017-02-26 01:27:32 +00:00