[VPlan] Get type from start value for VPWidenIntOrFpInduction (NFC).

fhahn · fhahn · commit 6c405694d134 · 2025-05-15T21:31:04.000+01:00
NFC for now but this can cause verification failures in the future, since after bf5627c wide induction may be narrowed. By using the type from the start value, we will always return the correct type.
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -2004,7 +2004,8 @@ class VPWidenIntOrFpInductionRecipe : public VPWidenInductionRecipe {
 
   /// Returns the scalar type of the induction.
   Type *getScalarType() const {
-    return Trunc ? Trunc->getType() : getPHINode()->getType();
+    return Trunc ? Trunc->getType()
+                 : getStartValue()->getLiveInIRValue()->getType();
   }
 
   /// Returns the VPValue representing the value of this induction at

Original file line number	Diff line number	Diff line change
`@@ -2004,7 +2004,8 @@ class VPWidenIntOrFpInductionRecipe : public VPWidenInductionRecipe {`
`2004`	`2004`
`2005`	`2005`	`/// Returns the scalar type of the induction.`
`2006`	`2006`	`Type *getScalarType() const {`
`2007`		`- return Trunc ? Trunc->getType() : getPHINode()->getType();`
	`2007`	`+ return Trunc ? Trunc->getType()`
	`2008`	`+ : getStartValue()->getLiveInIRValue()->getType();`
`2008`	`2009`	`}`
`2009`	`2010`
`2010`	`2011`	`/// Returns the VPValue representing the value of this induction at`