__builtin_object_size(ptr, type) returns -1 for type = {0,1} if there are any side-effects.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92453 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index 06afec7..d49a821 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -989,7 +989,7 @@
// TODO: Perhaps we should let LLVM lower this?
if (E->getArg(0)->HasSideEffects(Info.Ctx)) {
- if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() == 0)
+ if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() <= 1)
return Success(-1ULL, E);
return Success(0, E);
}
diff --git a/test/CodeGen/object-size.c b/test/CodeGen/object-size.c
index 4947c19..4b8cd55 100644
--- a/test/CodeGen/object-size.c
+++ b/test/CodeGen/object-size.c
@@ -109,3 +109,14 @@
// CHECK: %call = call i8* @__inline_strcpy_chk(i8* %tmp1, i8* getelementptr inbounds ([9 x i8]* @.str, i32 0, i32 0))
strcpy(gp += 1, "Hi there");
}
+
+void test17() {
+ // CHECK: store i32 -1
+ gi = __builtin_object_size(gp++, 0);
+ // CHECK: store i32 -1
+ gi = __builtin_object_size(gp++, 1);
+ // CHECK: store i32 0
+ gi = __builtin_object_size(gp++, 2);
+ // CHECK: store i32 0
+ gi = __builtin_object_size(gp++, 3);
+}