[PATCH] D94204: GlobalISel: Handle G_BUILD_VECTOR in isKnownToBeAPowerOfTwo
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jan 7 15:41:41 PST 2021
arsenm added inline comments.
================
Comment at: llvm/lib/CodeGen/GlobalISel/Utils.cpp:596
+ for (unsigned I = 1, E = MI.getNumOperands(); I != E; ++I) {
+ if (!isKnownToBeAPowerOfTwo(MI.getOperand(I).getReg(), MRI, KB))
+ return false;
----------------
aemerson wrote:
> What does it mean for a build_vector to be a known power of 2? Each element is *any* power of 2, or the vector is a splat of a power of 2?
All are any power of 2 regardless of the individual values
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D94204/new/
https://reviews.llvm.org/D94204
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