[llvm] [VPlan] Add VPValue for VF, use it for VPWidenIntOrFpInductionRecipe. (PR #95305)
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 9 06:33:39 PDT 2024
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@@ -934,8 +934,19 @@ void VPlan::prepareToExecute(Value *TripCountV, Value *VectorTripCountV,
IRBuilder<> Builder(State.CFG.PrevBB->getTerminator());
// FIXME: Model VF * UF computation completely in VPlan.
- VFxUF.setUnderlyingValue(
- createStepForVF(Builder, TripCountV->getType(), State.VF, State.UF));
+ if (VF.getNumUsers()) {
+ Value *RuntimeVF =
+ createStepForVF(Builder, TripCountV->getType(), State.VF, 1);
+ VF.setUnderlyingValue(RuntimeVF);
+ VFxUF.setUnderlyingValue(
+ State.UF > 1
+ ? Builder.CreateMul(
+ RuntimeVF, ConstantInt::get(TripCountV->getType(), State.UF))
+ : RuntimeVF);
+ } else {
+ VFxUF.setUnderlyingValue(
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fhahn wrote:
At the moment, it is always used (added assert in 1a5a1e97817).
https://github.com/llvm/llvm-project/pull/95305
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