caio/clang-p2996
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[VPlan] Use stored value from recipes for interleave groups.

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Instead of getting the VPValue for the stored IR values through the
current plan, use the stored value of the recipes directly.

This way, the correct VPValues are used if the store recipes have been
modified in the VPlan and the IR value is not correct any longer. This
can happen, e.g. due to D105008.
This commit is contained in:
Florian Hahn
2021-07-26 11:38:39 +01:00
parent 20b0fa91c9
commit d995d63767
1 changed files with 5 additions and 2 deletions
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7
llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
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@@ -9390,8 +9390,11 @@ VPlanPtr LoopVectorizationPlanner::buildVPlanWithVPRecipes(
RecipeBuilder.getRecipe(IG->getInsertPos()));
SmallVector<VPValue *, 4> StoredValues;
for (unsigned i = 0; i < IG->getFactor(); ++i)
if (auto *SI = dyn_cast_or_null<StoreInst>(IG->getMember(i)))
StoredValues.push_back(Plan->getOrAddVPValue(SI->getOperand(0)));
if (auto *SI = dyn_cast_or_null<StoreInst>(IG->getMember(i))) {
auto *StoreR =
cast<VPWidenMemoryInstructionRecipe>(RecipeBuilder.getRecipe(SI));
StoredValues.push_back(StoreR->getStoredValue());
}
auto *VPIG = new VPInterleaveRecipe(IG, Recipe->getAddr(), StoredValues,
Recipe->getMask());