[X86][FastISel] Assert that we are dealing with arithmetic with overflow intrinsics. NFC
llvm-svn: 286961
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index a6dbf75..1979433 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -2769,6 +2769,9 @@
const Function *Callee = II->getCalledFunction();
auto *Ty = cast<StructType>(Callee->getReturnType());
Type *RetTy = Ty->getTypeAtIndex(0U);
+ assert(Ty->getTypeAtIndex(1)->isIntegerTy() &&
+ Ty->getTypeAtIndex(1)->getScalarSizeInBits() == 1 &&
+ "Overflow value expected to be an i1");
MVT VT;
if (!isTypeLegal(RetTy, VT))