Clarify casting of MulVector[...]

badumbatish · badumbatish · commit 751de4c761a3 · 2025-08-14T18:18:01.000-07:00
diff --git a/llvm/lib/Analysis/ConstantFolding.cpp b/llvm/lib/Analysis/ConstantFolding.cpp
@@ -3845,7 +3845,7 @@ static Constant *ConstantFoldFixedVectorCall(
       MulVector[I] = Elt0->getSExtValue() * Elt1->getSExtValue();
     }
     for (unsigned I = 0; I < Result.size(); I++) {
-      int64_t IAdd = (int64_t)MulVector[I * 2] + MulVector[I * 2 + 1];
+      int64_t IAdd = (int64_t)MulVector[I * 2] + (int64_t)MulVector[I * 2 + 1];
       Result[I] = ConstantInt::get(Ty, IAdd);
     }
 

Original file line number	Diff line number	Diff line change
`@@ -3845,7 +3845,7 @@ static Constant *ConstantFoldFixedVectorCall(`
`3845`	`3845`	`MulVector[I] = Elt0->getSExtValue() * Elt1->getSExtValue();`
`3846`	`3846`	`}`
`3847`	`3847`	`for (unsigned I = 0; I < Result.size(); I++) {`
`3848`		`- int64_t IAdd = (int64_t)MulVector[I * 2] + MulVector[I * 2 + 1];`
	`3848`	`+ int64_t IAdd = (int64_t)MulVector[I * 2] + (int64_t)MulVector[I * 2 + 1];`
`3849`	`3849`	`Result[I] = ConstantInt::get(Ty, IAdd);`
`3850`	`3850`	`}`
`3851`	`3851`