If the first argument of __builtin_object_size can be folded to a constant
pointer, but such folding encounters side-effects, ignore the side-effects
rather than performing them at runtime: CodeGen generates wrong code for
__builtin_object_size in that case.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157310 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/object-size.c b/test/CodeGen/object-size.c
index 1f16d02..df6189e 100644
--- a/test/CodeGen/object-size.c
+++ b/test/CodeGen/object-size.c
@@ -55,7 +55,10 @@
// CHECK: define void @test7
void test7() {
int i;
- // CHECK: = call i64 @llvm.objectsize.i64(i8* {{.*}}@gbuf{{.*}}, i1 false)
+ // Ensure we only evaluate the side-effect once.
+ // CHECK: = add
+ // CHECK-NOT: = add
+ // CHECK: = call i8* @__strcpy_chk(i8* getelementptr inbounds ([63 x i8]* @gbuf, i32 0, i32 0), i8* getelementptr inbounds ([9 x i8]* @.str, i32 0, i32 0), i64 63)
strcpy((++i, gbuf), "Hi there");
}