If we can convert the return pointer type into an integer that IntPtrType

can be converted to losslessly, we can continue the conversion to a direct call.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27880 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index be3868dca8c3f85d6dc2402d90aa6fef1cebd736..79d79011f4b1c53a0a727a717b880fdc88421019 100644 (file)
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -5681,8 +5681,10 @@ bool InstCombiner::transformConstExprCastCall(CallSite CS) {
   // Check to see if we are changing the return type...
   if (OldRetTy != FT->getReturnType()) {
     if (Callee->isExternal() &&
-        !OldRetTy->isLosslesslyConvertibleTo(FT->getReturnType()) &&
-        !Caller->use_empty())
+        !(OldRetTy->isLosslesslyConvertibleTo(FT->getReturnType()) ||
+          (isa<PointerType>(FT->getReturnType()) && 
+           OldRetTy->isLosslesslyConvertibleTo(TD->getIntPtrType())))
+        && !Caller->use_empty())
       return false;   // Cannot transform this return value...
 
     // If the callsite is an invoke instruction, and the return value is used by