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// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s
void p2unsigned(unsigned **ptr) {
// CHECK-LABEL: define void @p2unsigned(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0:!.+]]
// CHECK-NEXT: [[BASE:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store ptr null, ptr [[BASE]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
*ptr = 0;
}
void p2unsigned_volatile(unsigned *volatile *ptr) {
// CHECK-LABEL: define void @p2unsigned_volatile(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store volatile ptr null, ptr [[BASE]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
*ptr = 0;
}
void p3int(int ***ptr) {
// CHECK-LABEL: define void @p3int(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_0:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_1:%.+]] = load ptr, ptr [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store ptr null, ptr [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
**ptr = 0;
}
void p4char(char ****ptr) {
// CHECK-LABEL: define void @p4char(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_0:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_1:%.+]] = load ptr, ptr [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_2:%.+]] = load ptr, ptr [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store ptr null, ptr [[BASE_2]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
***ptr = 0;
}
void p4char_const1(const char ****ptr) {
// CHECK-LABEL: define void @p4char_const1(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_0:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_1:%.+]] = load ptr, ptr [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_2:%.+]] = load ptr, ptr [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store ptr null, ptr [[BASE_2]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
***ptr = 0;
}
void p4char_const2(const char **const **ptr) {
// CHECK-LABEL: define void @p4char_const2(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_0:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_1:%.+]] = load ptr, ptr [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE_2:%.+]] = load ptr, ptr [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store ptr null, ptr [[BASE_2]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
***ptr = 0;
}
struct S1 {
int x;
int y;
};
void p2struct(struct S1 **ptr) {
// CHECK-LABEL: define void @p2struct(ptr noundef %ptr)
// CHECK-NEXT: entry:
// CHECK-NEXT: %ptr.addr = alloca ptr, align 8
// CHECK-NEXT: store ptr %ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: [[BASE:%.+]] = load ptr, ptr %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: store ptr null, ptr [[BASE]], align 8, !tbaa [[ANY_POINTER_0]]
// CHECK-NEXT: ret void
//
*ptr = 0;
}
// CHECK: [[ANY_POINTER_0]] = !{[[ANY_POINTER:!.+]], [[ANY_POINTER]], i64 0}
// CHECK: [[ANY_POINTER]] = !{!"any pointer", [[CHAR:!.+]], i64 0}
// CHECK: [[CHAR]] = !{!"omnipotent char", [[TBAA_ROOT:!.+]], i64 0}
// CHECK: [[TBAA_ROOT]] = !{!"Simple C/C++ TBAA"}
//
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