[PATCH] D62263: [DAGCombine][X86][AArch64][AMDGPU] (x - y) + -1 -> add (xor y, -1), x fold
Roman Lebedev via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed May 22 10:31:14 PDT 2019
lebedev.ri created this revision.
lebedev.ri added reviewers: RKSimon, craig.topper, spatel, arsenm.
lebedev.ri added a project: LLVM.
Herald added subscribers: kristof.beyls, t-tye, tpr, dstuttard, javed.absar, yaxunl, nhaehnle, wdng, jvesely, kzhuravl.
This prevents regressions in next patch,
and somewhat recovers from the regression to AMDGPU test in D62223 <https://reviews.llvm.org/D62223>.
https://rise4fun.com/Alive/ZRl
Repository:
rL LLVM
https://reviews.llvm.org/D62263
Files:
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
test/CodeGen/AArch64/xor.ll
test/CodeGen/AMDGPU/llvm.amdgcn.s.barrier.ll
test/CodeGen/X86/xor.ll
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