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

[Florian Hahn via cfe-commits]

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@@ -1117,13 +1119,7 @@ void VPScalarIVStepsRecipe::execute(VPTransformState &State) {
 
   // Ensure step has the same type as that of scalar IV.
   Type *BaseIVTy = BaseIV->getType()->getScalarType();
-  if (BaseIVTy != Step->getType()) {
-    // TODO: Also use VPDerivedIVRecipe when only the step needs truncating, to
-    // avoid separate truncate here.
-    assert(Step->getType()->isIntegerTy() &&
-           "Truncation requires an integer step");
-    Step = State.Builder.CreateTrunc(Step, BaseIVTy);
-  }
+  assert(BaseIVTy == Step->getType());
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fhahn wrote:

Added, thanks!

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