Fix copy+pasto issues in isMulSExtable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106759 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index e8da89a..9982f1d 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -392,12 +392,13 @@
return isa<SCEVAddExpr>(SE.getSignExtendExpr(A, WideTy));
}
-/// isMulSExtable - Return true if the given add can be sign-extended
+/// isMulSExtable - Return true if the given mul can be sign-extended
/// without changing its value.
-static bool isMulSExtable(const SCEVMulExpr *A, ScalarEvolution &SE) {
+static bool isMulSExtable(const SCEVMulExpr *M, ScalarEvolution &SE) {
const Type *WideTy =
- IntegerType::get(SE.getContext(), SE.getTypeSizeInBits(A->getType()) + 1);
- return isa<SCEVMulExpr>(SE.getSignExtendExpr(A, WideTy));
+ IntegerType::get(SE.getContext(),
+ SE.getTypeSizeInBits(M->getType()) * M->getNumOperands());
+ return isa<SCEVMulExpr>(SE.getSignExtendExpr(M, WideTy));
}
/// getExactSDiv - Return an expression for LHS /s RHS, if it can be determined