[PATCH] D134418: [AMDGPU] Improve ISel for v_bfi instructions.
Jay Foad via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Sep 23 00:26:18 PDT 2022
foad added inline comments.
================
Comment at: llvm/lib/Target/AMDGPU/SIInstructions.td:1909
+// ((a ^ y) & C0) ^ ((y & C1) | (z & ~C1)) <=>
+// (a & C0) | (~C0 & ((y & C1) | (z & ~C1)))
+def : AMDGPUPat <
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Still not true. Counterexample: a=y=C1=0, z=C0=1.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D134418/new/
https://reviews.llvm.org/D134418
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