[llvm] [LLVM][VPlan] Pick more optimal initial value for VPBlend. (PR #104019)
David Sherwood via llvm-commits
llvm-commits at lists.llvm.org
Wed Aug 21 07:59:31 PDT 2024
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@@ -918,6 +918,16 @@ static void simplifyRecipe(VPRecipeBase &R, VPTypeAnalysis &TypeInfo) {
// value with the others blended into it.
unsigned StartIndex = 0;
+ for (unsigned I = 0; I != Blend->getNumIncomingValues(); ++I) {
+ // If a value's mask is only used by the blend then is can be deadcoded.
+ // TODO: Fine the most expensive mask that can be deadcoded.
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david-arm wrote:
nit: I think this should be `// TODO: Find`
https://github.com/llvm/llvm-project/pull/104019
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