From 8b245ab41dfaed153e9ce768470107ec71551e1f Mon Sep 17 00:00:00 2001 From: Florian Hahn Date: Sun, 27 Mar 2022 19:59:37 +0100 Subject: [PATCH] [Clang,TBAA] Add test cases for nested pointers and TBAA data. --- clang/test/CodeGen/tbaa-pointers.c | 103 +++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 clang/test/CodeGen/tbaa-pointers.c diff --git a/clang/test/CodeGen/tbaa-pointers.c b/clang/test/CodeGen/tbaa-pointers.c new file mode 100644 index 000000000000..bde26d17e143 --- /dev/null +++ b/clang/test/CodeGen/tbaa-pointers.c @@ -0,0 +1,103 @@ +// 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(i32** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca i32**, align 8 + // CHECK-NEXT: store i32** %ptr, i32*** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0:!.+]] + // CHECK-NEXT: [[BASE:%.+]] = load i32**, i32*** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store i32* null, i32** [[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(i32** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca i32**, align 8 + // CHECK-NEXT: store i32** %ptr, i32*** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE:%.+]] = load i32**, i32*** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store volatile i32* null, i32** [[BASE]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: ret void + // + *ptr = 0; +} + +void p3int(int ***ptr) { + // CHECK-LABEL: define void @p3int(i32*** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca i32***, align 8 + // CHECK-NEXT: store i32*** %ptr, i32**** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_0:%.+]] = load i32***, i32**** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_1:%.+]] = load i32**, i32*** [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store i32* null, i32** [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: ret void + // + **ptr = 0; +} + +void p4char(char ****ptr) { + // CHECK-LABEL: define void @p4char(i8**** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca i8****, align 8 + // CHECK-NEXT: store i8**** %ptr, i8***** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_0:%.+]] = load i8****, i8***** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_1:%.+]] = load i8***, i8**** [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_2:%.+]] = load i8**, i8*** [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store i8* null, i8** [[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(i8**** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca i8****, align 8 + // CHECK-NEXT: store i8**** %ptr, i8***** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_0:%.+]] = load i8****, i8***** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_1:%.+]] = load i8***, i8**** [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_2:%.+]] = load i8**, i8*** [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store i8* null, i8** [[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(i8**** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca i8****, align 8 + // CHECK-NEXT: store i8**** %ptr, i8***** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_0:%.+]] = load i8****, i8***** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_1:%.+]] = load i8***, i8**** [[BASE_0]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE_2:%.+]] = load i8**, i8*** [[BASE_1]], align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store i8* null, i8** [[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(%struct.S1** noundef %ptr) + // CHECK-NEXT: entry: + // CHECK-NEXT: %ptr.addr = alloca %struct.S1**, align 8 + // CHECK-NEXT: store %struct.S1** %ptr, %struct.S1*** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: [[BASE:%.+]] = load %struct.S1**, %struct.S1*** %ptr.addr, align 8, !tbaa [[ANY_POINTER_0]] + // CHECK-NEXT: store %struct.S1* null, %struct.S1** [[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"} +//