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// REQUIRES: asserts
// RUN: %clang_cc1 -x objective-c -emit-llvm -triple x86_64-apple-macosx10.10.0 -fsanitize=nullability-return,returns-nonnull-attribute,nullability-arg,nonnull-attribute %s -o - -w | FileCheck %s
// If both the annotation and the attribute are present, prefer the attribute,
// since it actually affects IRGen.
// CHECK-LABEL: define nonnull i32* @f1
__attribute__((returns_nonnull)) int *_Nonnull f1(int *_Nonnull p) {
// CHECK: entry:
// CHECK-NEXT: [[SLOC_PTR:%.*]] = alloca i8*
// CHECK-NEXT: [[ADDR:%.*]] = alloca i32*
// CHECK-NEXT: store i8* null, i8** [[SLOC_PTR]]
// CHECK-NEXT: store i32* [[P:%.*]], i32** [[ADDR]]
// CHECK-NEXT: store {{.*}} [[SLOC_PTR]]
// CHECK-NEXT: [[ARG:%.*]] = load i32*, i32** [[ADDR]]
// CHECK-NEXT: [[SLOC:%.*]] = load {{.*}} [[SLOC_PTR]]
// CHECK-NEXT: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC]], null
// CHECK-NEXT: br i1 [[SLOC_NONNULL]], label %nullcheck
//
// CHECK: nullcheck:
// CHECK-NEXT: [[ICMP:%.*]] = icmp ne i32* [[ARG]], null, !nosanitize
// CHECK-NEXT: br i1 [[ICMP]], label %[[CONT:.+]], label %[[HANDLE:[^,]+]]
// CHECK: [[HANDLE]]:
// CHECK: call void @__ubsan_handle_nonnull_return
// CHECK-NEXT: unreachable, !nosanitize
// CHECK: [[CONT]]:
// CHECK-NEXT: br label %no.nullcheck
// CHECK: no.nullcheck:
// CHECK-NEXT: ret i32* [[ARG]]
return p;
}
// CHECK-LABEL: define void @f2
void f2(int *_Nonnull __attribute__((nonnull)) p) {}
// CHECK-LABEL: define void @call_f2
void call_f2() {
// CHECK: call void @__ubsan_handle_nonnull_arg_abort
// CHECK-NOT: call void @__ubsan_handle_nonnull_arg_abort
f2((void *)0);
}
// If the return value isn't meant to be checked, make sure we don't check it.
// CHECK-LABEL: define i32* @f3
int *f3(int *p) {
// CHECK-NOT: return.sloc
// CHECK-NOT: call{{.*}}ubsan
return p;
}
// Check for a valid "return" source location, even when there is no return
// statement, to avoid accidentally calling the runtime.
// CHECK-LABEL: define nonnull i32* @f4
__attribute__((returns_nonnull)) int *f4() {
// CHECK: store i8* null, i8** [[SLOC_PTR:%.*]]
// CHECK: [[SLOC:%.*]] = load {{.*}} [[SLOC_PTR]]
// CHECK: [[SLOC_NONNULL:%.*]] = icmp ne i8* [[SLOC]], null
// CHECK: br i1 [[SLOC_NONNULL]], label %nullcheck
// CHECK: nullcheck:
}
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