llvm/clang/test/CodeGen/tbaa.c

// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -no-struct-path-tbaa -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s -check-prefixes=PATH
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O0 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s -check-prefix=NO-TBAA
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -relaxed-aliasing -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s -check-prefix=NO-TBAA
// Test TBAA metadata generated by front-end.
//
// NO-TBAA-NOT: !tbaa

typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef unsigned long long uint64_t;

typedef enum {
  RED_AUTO_32,
  GREEN_AUTO_32,
  BLUE_AUTO_32
} EnumAuto32;

typedef enum {
  RED_AUTO_64,
  GREEN_AUTO_64,
  BLUE_AUTO_64 = 0x100000000ull
} EnumAuto64;

typedef enum : uint16_t {
  RED_16,
  GREEN_16,
  BLUE_16
} Enum16;

typedef enum : uint8_t {
  RED_8,
  GREEN_8,
  BLUE_8
} Enum8;

uint32_t g0(EnumAuto32 *E, uint32_t *val) {
// CHECK-LABEL: define{{.*}} i32 @g0(
// CHECK: store i32 5, ptr %{{.*}}, align 4, !tbaa [[TAG_i32:!.*]]
// CHECK: store i32 0, ptr %{{.*}}, align 4, !tbaa [[TAG_i32]]
// CHECK: load i32, ptr %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH-LABEL: define{{.*}} i32 @g0(
// PATH: store i32 5, ptr %{{.*}}, align 4, !tbaa [[TAG_i32:!.*]]
// PATH: store i32 0, ptr %{{.*}}, align 4, !tbaa [[TAG_i32]]
// PATH: load i32, ptr %{{.*}}, align 4, !tbaa [[TAG_i32]]
  *val = 5;
  *E = RED_AUTO_32;
  return *val;
}

uint64_t g1(EnumAuto64 *E, uint64_t *val) {
// CHECK-LABEL: define{{.*}} i64 @g1(
// CHECK: store i64 5, ptr %{{.*}}, align 8, !tbaa [[TAG_i64:!.*]]
// CHECK: store i64 0, ptr %{{.*}}, align 8, !tbaa [[TAG_long:!.*]]
// CHECK: load i64, ptr %{{.*}}, align 8, !tbaa [[TAG_i64]]
// PATH-LABEL: define{{.*}} i64 @g1(
// PATH: store i64 5, ptr %{{.*}}, align 8, !tbaa [[TAG_i64:!.*]]
// PATH: store i64 0, ptr %{{.*}}, align 8, !tbaa [[TAG_long:!.*]]
// PATH: load i64, ptr %{{.*}}, align 8, !tbaa [[TAG_i64]]
  *val = 5;
  *E = RED_AUTO_64;
  return *val;
}

uint16_t g2(Enum16 *E, uint16_t *val) {
// CHECK-LABEL: define{{.*}} i16 @g2(
// CHECK: store i16 5, ptr %{{.*}}, align 2, !tbaa [[TAG_i16:!.*]]
// CHECK: store i16 0, ptr %{{.*}}, align 2, !tbaa [[TAG_i16]]
// CHECK: load i16, ptr %{{.*}}, align 2, !tbaa [[TAG_i16]]
// PATH-LABEL: define{{.*}} i16 @g2(
// PATH: store i16 5, ptr %{{.*}}, align 2, !tbaa [[TAG_i16:!.*]]
// PATH: store i16 0, ptr %{{.*}}, align 2, !tbaa [[TAG_i16]]
// PATH: load i16, ptr %{{.*}}, align 2, !tbaa [[TAG_i16]]
  *val = 5;
  *E = RED_16;
  return *val;
}

uint8_t g3(Enum8 *E, uint8_t *val) {
// CHECK-LABEL: define{{.*}} i8 @g3(
// CHECK: store i8 5, ptr %{{.*}}, align 1, !tbaa [[TAG_i8:!.*]]
// CHECK: store i8 0, ptr %{{.*}}, align 1, !tbaa [[TAG_i8]]
// CHECK: load i8, ptr %{{.*}}, align 1, !tbaa [[TAG_i8]]
// PATH-LABEL: define{{.*}} i8 @g3(
// PATH: store i8 5, ptr %{{.*}}, align 1, !tbaa [[TAG_i8:!.*]]
// PATH: store i8 0, ptr %{{.*}}, align 1, !tbaa [[TAG_i8]]
// PATH: load i8, ptr %{{.*}}, align 1, !tbaa [[TAG_i8]]
  *val = 5;
  *E = RED_8;
  return *val;
}

// CHECK: [[TYPE_char:!.*]] = !{!"omnipotent char", [[TAG_c_tbaa:!.*]],
// CHECK: [[TAG_c_tbaa]] = !{!"Simple C/C++ TBAA"}
// CHECK: [[TAG_i32]] = !{[[TYPE_i32:!.*]], [[TYPE_i32]], i64 0}
// CHECK: [[TYPE_i32]] = !{!"int", [[TYPE_char]],
// CHECK: [[TAG_i64]] = !{[[TYPE_i64:!.*]], [[TYPE_i64]], i64 0}
// CHECK: [[TYPE_i64]] = !{!"long long", [[TYPE_char]],
// CHECK: [[TAG_long]] = !{[[TYPE_long:!.*]], [[TYPE_long]], i64 0}
// CHECK: [[TYPE_long]] = !{!"long", [[TYPE_char]],
// CHECK: [[TAG_i16]] = !{[[TYPE_i16:!.*]], [[TYPE_i16]], i64 0}
// CHECK: [[TYPE_i16]] = !{!"short", [[TYPE_char]],
// CHECK: [[TAG_i8]] = !{[[TYPE_i8:!.*]], [[TYPE_char]], i64 0}

// PATH: [[TYPE_char:!.*]] = !{!"omnipotent char", [[TAG_c_tbaa:!.*]],
// PATH: [[TAG_c_tbaa]] = !{!"Simple C/C++ TBAA"}
// PATH: [[TAG_i32]] = !{[[TYPE_i32:!.*]], [[TYPE_i32]], i64 0}
// PATH: [[TYPE_i32]] = !{!"int", [[TYPE_char]],
// PATH: [[TAG_i64]] = !{[[TYPE_i64:!.*]], [[TYPE_i64]], i64 0}
// PATH: [[TYPE_i64]] = !{!"long long", [[TYPE_char]],
// PATH: [[TAG_long]] = !{[[TYPE_long:!.*]], [[TYPE_long]], i64 0}
// PATH: [[TYPE_long]] = !{!"long", [[TYPE_char]],
// PATH: [[TAG_i16]] = !{[[TYPE_i16:!.*]], [[TYPE_i16]], i64 0}
// PATH: [[TYPE_i16]] = !{!"short", [[TYPE_char]],
// PATH: [[TAG_i8]] = !{[[TYPE_i8:!.*]], [[TYPE_char]], i64 0}