Simon Pilgrim d1adb786cc [X86][SSE42] Lower v2i64/v4i64 ASHR(X, 63) as PCMPGTQ(0, X) ...

Similar to what we do for vXi8 ASHR(X, 7), use SSE42's PCMPGTQ to splat the sign instead of using the PSRAD+PSHUFD.

Avoiding bitcasts this improves combines that utilize computeNumSignBits, permits memory folding and reduces pipe pressure. Although it does require a second register, given that this is a (cheap) zero register the impact is minimal.

Differential Revision: https://reviews.llvm.org/D32973

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302525 91177308-0d34-0410-b5e6-96231b3b80d8

2017-05-09 13:14:40 +00:00

..

Analysis

Introduce experimental generic intrinsics for horizontal vector reductions.

2017-05-09 10:43:25 +00:00

AsmParser

AMDGPU: Add AMDGPU_HS calling convention

2017-05-02 15:41:10 +00:00

Bitcode

Re-apply r302108, "IR: Use pointers instead of GUIDs to represent edges in the module summary. NFCI."

2017-05-04 18:03:25 +00:00

CodeGen

Introduce experimental generic intrinsics for horizontal vector reductions.

2017-05-09 10:43:25 +00:00

DebugInfo

Revert "[Dwarf] Disable reference verification for now (PR32972)"

2017-05-09 13:05:43 +00:00

Demangle

…

ExecutionEngine

Make llvm-rtdlyd -check preserve automatic address mappings made by RuntimeDyld.

2017-05-07 17:19:53 +00:00

Fuzzer

[libFuzzer] update docs on -print_coverage/-dump_coverage

2017-05-09 01:34:27 +00:00

IR

Introduce experimental generic intrinsics for horizontal vector reductions.

2017-05-09 10:43:25 +00:00

IRReader

…

LibDriver

Fix some ArgList uses after API change in r300135.

2017-04-12 23:43:58 +00:00

LineEditor

…

Linker

…

LTO

Re-apply r302108, "IR: Use pointers instead of GUIDs to represent edges in the module summary. NFCI."

2017-05-04 18:03:25 +00:00

MC

[ARM] Clear the constant pool cache on explicit .ltorg directives

2017-05-08 10:26:24 +00:00

Object

Hopefully one last commit to fix this patch, addresses string reference

2017-05-08 02:47:42 +00:00

ObjectYAML

[WebAssembly] Add ObjectYAML support for wasm name section

2017-05-05 18:12:34 +00:00

Option

ArgList: cache index ranges containing arguments with each ID

2017-04-12 23:19:51 +00:00

Passes

[PM] Add ProfileSummaryAnalysis as a required pass in the new pipeline.

2017-05-04 16:58:45 +00:00

ProfileData

[ProfileData] Unify getInstrProf*SectionName helpers

2017-04-15 00:09:57 +00:00

Support

[APInt] Use default constructor instead of explicitly creating a 1-bit APInt in udiv and urem. NFC

2017-05-08 23:49:54 +00:00

TableGen

…

Target

[X86][SSE42] Lower v2i64/v4i64 ASHR(X, 63) as PCMPGTQ(0, X)

2017-05-09 13:14:40 +00:00

Transforms

Introduce experimental generic intrinsics for horizontal vector reductions.

2017-05-09 10:43:25 +00:00

XRay

[XRay] - Fix spelling error to test commit access.

2017-04-06 03:32:01 +00:00

CMakeLists.txt

…

LLVMBuild.txt

…