fix PR8983, a broken assertion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123562 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 3008210..55a10d7 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -581,7 +581,7 @@
if (NumOps == 2 &&
cast<PointerType>(ResultTy)->getElementType()->isIntegerTy(8)) {
ConstantExpr *CE = dyn_cast<ConstantExpr>(Ops[1]);
- assert(CE->getType() == IntPtrTy &&
+ assert((CE == 0 || CE->getType() == IntPtrTy) &&
"CastGEPIndices didn't canonicalize index types!");
if (CE && CE->getOpcode() == Instruction::Sub &&
CE->getOperand(0)->isNullValue()) {
diff --git a/test/Transforms/InstCombine/crash.ll b/test/Transforms/InstCombine/crash.ll
index e87a302..e8babc3 100644
--- a/test/Transforms/InstCombine/crash.ll
+++ b/test/Transforms/InstCombine/crash.ll
@@ -341,3 +341,15 @@
%select = select i1 %cmp, double 2.000000e+00, double 3.141592e+00
ret double %select
}
+
+
+; PR8983
+%struct.basic_ios = type { i8 }
+
+define %struct.basic_ios *@test17() ssp {
+entry:
+ %add.ptr.i = getelementptr i8* null, i64 undef
+ %0 = bitcast i8* %add.ptr.i to %struct.basic_ios*
+ ret %struct.basic_ios* %0
+}
+