[all-commits] [llvm/llvm-project] 40e269: [GlobalISel] Add a combine for ashr(shl x, c), c -...
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Tue Aug 18 10:42:38 PDT 2020
Branch: refs/heads/master
Home: https://github.com/llvm/llvm-project
Commit: 40e269ea6db9c755c27e2ee1e201a640ac085afd
https://github.com/llvm/llvm-project/commit/40e269ea6db9c755c27e2ee1e201a640ac085afd
Author: Amara Emerson <amara at apple.com>
Date: 2020-08-18 (Tue, 18 Aug 2020)
Changed paths:
M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
M llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
M llvm/include/llvm/Target/GlobalISel/Combine.td
M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
A llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-ashr-shl-to-sext-inreg.mir
M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.sbfe.ll
M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.ubfe.ll
M llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
M llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
Log Message:
-----------
[GlobalISel] Add a combine for ashr(shl x, c), c --> sext_inreg x, c'
By detecting this sign extend pattern early, we can uncover opportunities for
more optimizations.
Differential Revision: https://reviews.llvm.org/D85965
Commit: 04a6ea5d77e7613a5e1398ddf2a0fcb4e1cea41c
https://github.com/llvm/llvm-project/commit/04a6ea5d77e7613a5e1398ddf2a0fcb4e1cea41c
Author: Amara Emerson <amara at apple.com>
Date: 2020-08-18 (Tue, 18 Aug 2020)
Changed paths:
M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
M llvm/include/llvm/Target/GlobalISel/Combine.td
M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
M llvm/lib/CodeGen/MachineFunction.cpp
A llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-sextload-from-sextinreg.mir
Log Message:
-----------
[GlobalISel] Add a combine for sext_inreg(load x), c --> sextload x
This is restricted to single use loads, which if we fold to sextloads we can
find more optimal addressing modes on AArch64.
This also fixes an overload the MachineFunction::getMachineMemOperand() method
which was incorrectly using the MF alignment instead of the MMO alignment.
Differential Revision: https://reviews.llvm.org/D85966
Compare: https://github.com/llvm/llvm-project/compare/55565752306e...04a6ea5d77e7
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