[PATCH] D118635: [GlobalISel] Combine: (G_*MULO x, 0) -> 0 + no carry out
Jay Foad via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Feb 1 02:22:56 PST 2022
foad added inline comments.
================
Comment at: llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp:4590
+ B.buildConstant(Dst, 0);
+ B.buildConstant(Carry, 0);
+ };
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How does this work? Don't you need to build a single instruction that has two results (just like G_*MULO)?
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D118635/new/
https://reviews.llvm.org/D118635
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