[clang] 8b245ab - [Clang, TBAA] Add test cases for nested pointers and TBAA data.

[Florian Hahn via cfe-commits]

Author: Florian Hahn
Date: 2022-03-27T19:59:37+01:00
New Revision: 8b245ab41dfaed153e9ce768470107ec71551e1f

URL: https://github.com/llvm/llvm-project/commit/8b245ab41dfaed153e9ce768470107ec71551e1f
DIFF: https://github.com/llvm/llvm-project/commit/8b245ab41dfaed153e9ce768470107ec71551e1f.diff

LOG: [Clang,TBAA] Add test cases for nested pointers and TBAA data.

Added: 
    clang/test/CodeGen/tbaa-pointers.c

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/clang/test/CodeGen/tbaa-pointers.c b/clang/test/CodeGen/tbaa-pointers.c
new file mode 100644
index 0000000000000..bde26d17e1430
--- /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"}
+//