diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 8522b610e1..db178b3d1f 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -1801,7 +1801,8 @@ bool InstCombiner::transformConstExprCastCall(CallSite CS) { const Type *OldRetTy = Caller->getType(); if (Callee->isExternal() && - !OldRetTy->isLosslesslyConvertibleTo(FT->getReturnType())) + !OldRetTy->isLosslesslyConvertibleTo(FT->getReturnType()) && + !Caller->use_empty()) return false; // Cannot transform this return value... unsigned NumActualArgs = unsigned(CS.arg_end()-CS.arg_begin()); |