Don't fold double constant to an integer if dest type not integral
Summary:
I encountered this issue when constant folding during inlining tried to
fold away a bitcast of a double to an x86_mmx, which is not an integral
type. The test case exposes the same issue with a smaller code snippet
during early CSE.
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D18528
llvm-svn: 265367
diff --git a/llvm/lib/IR/ConstantFold.cpp b/llvm/lib/IR/ConstantFold.cpp
index 62a7f2e..824555c 100644
--- a/llvm/lib/IR/ConstantFold.cpp
+++ b/llvm/lib/IR/ConstantFold.cpp
@@ -191,6 +191,10 @@
if (FP->getType()->isPPC_FP128Ty())
return nullptr;
+ // Make sure dest type is compatible with the folded integer constant.
+ if (!DestTy->isIntegerTy())
+ return nullptr;
+
return ConstantInt::get(FP->getContext(),
FP->getValueAPF().bitcastToAPInt());
}