[AMDGPU] Improved wide multiplies
authorJessica Del <Jessica.Del@amd.com>
Tue, 21 Feb 2023 08:40:07 +0000 (09:40 +0100)
committerJessica Del <Jessica.Del@amd.com>
Wed, 22 Feb 2023 15:39:06 +0000 (16:39 +0100)
commitfc672b6a8b48195b7afaba6f0f9d64e579b1dc72
treea8a18597a16092aca7ec27b13a9fec53270516cf
parent7d9d855a073a496540d4e40e67945b6f09d3aea7
[AMDGPU] Improved wide multiplies

These checks show optimized instructions if an operand is known to be
(partially) zero.

Change-Id: Ie2f6d0d3ee9d5b279d1f4c1dd0787492e39cc77a

Differential Revision: https://reviews.llvm.org/D140208
llvm/include/llvm/CodeGen/GlobalISel/Legalizer.h
llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
llvm/lib/CodeGen/GlobalISel/Legalizer.cpp
llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.ll
llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.mir
llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
llvm/unittests/CodeGen/GlobalISel/LegalizerTest.cpp