Make sure that simplify libcalls does not replace a call with one calling
convention with a new call with a different calling convention.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106134 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 3ae79ee..cbb58bb 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -66,6 +66,11 @@
this->TD = TD;
if (CI->getCalledFunction())
Context = &CI->getCalledFunction()->getContext();
+
+ // We never change the calling convention.
+ if (CI->getCallingConv() != llvm::CallingConv::C)
+ return NULL;
+
return CallOptimizer(CI->getCalledFunction(), CI, B);
}
};