[clang] [clang-tools-extra] [llvm] [VPlan] Add new VPUniformPerUFRecipe, use for step truncation. (PR #78113)

[Florian Hahn via cfe-commits]

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@@ -230,7 +230,11 @@ Type *VPTypeAnalysis::inferScalarType(const VPValue *V) {
             return V->getUnderlyingValue()->getType();
           })
           .Case<VPWidenCastRecipe>(
-              [](const VPWidenCastRecipe *R) { return R->getResultType(); });
+              [](const VPWidenCastRecipe *R) { return R->getResultType(); })
+          .Case<VPExpandSCEVRecipe>([](const VPExpandSCEVRecipe *R) {
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fhahn wrote:

It is needed to infer the type of the step in the new code in  VPlanTransforms.cpp (`if (TypeInfo.inferScalarType(BaseIV) != TypeInfo.inferScalarType(Step)) {)`).

https://github.com/llvm/llvm-project/pull/78113