llvm-project/clang/test/CodeGen/builtins-overflow.c

// Test CodeGen for Security Check Overflow Builtins.
// rdar://13421498

// RUN: %clang_cc1 -triple "i686-unknown-unknown"   -emit-llvm -x c %s -o - | FileCheck %s
// RUN: %clang_cc1 -triple "x86_64-unknown-unknown" -emit-llvm -x c %s -o - | FileCheck %s
// RUN: %clang_cc1 -triple "x86_64-mingw32"         -emit-llvm -x c %s -o - | FileCheck %s

extern unsigned UnsignedErrorCode;
extern unsigned long UnsignedLongErrorCode;
extern unsigned long long UnsignedLongLongErrorCode;
extern int IntErrorCode;
extern long LongErrorCode;
extern long long LongLongErrorCode;
void overflowed(void);

unsigned test_add_overflow_uint_uint_uint(unsigned x, unsigned y) {
  // CHECK-LABEL: define i32 @test_add_overflow_uint_uint_uint
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  unsigned r;
  if (__builtin_add_overflow(x, y, &r))
    overflowed();
  return r;
}

int test_add_overflow_int_int_int(int x, int y) {
  // CHECK-LABEL: define i32 @test_add_overflow_int_int_int
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  int r;
  if (__builtin_add_overflow(x, y, &r))
    overflowed();
  return r;
}

unsigned test_sub_overflow_uint_uint_uint(unsigned x, unsigned y) {
  // CHECK-LABEL: define i32 @test_sub_overflow_uint_uint_uint
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  unsigned r;
  if (__builtin_sub_overflow(x, y, &r))
    overflowed();
  return r;
}

int test_sub_overflow_int_int_int(int x, int y) {
  // CHECK-LABEL: define i32 @test_sub_overflow_int_int_int
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  int r;
  if (__builtin_sub_overflow(x, y, &r))
    overflowed();
  return r;
}

unsigned test_mul_overflow_uint_uint_uint(unsigned x, unsigned y) {
  // CHECK-LABEL: define i32 @test_mul_overflow_uint_uint_uint
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  unsigned r;
  if (__builtin_mul_overflow(x, y, &r))
    overflowed();
  return r;
}

int test_mul_overflow_int_int_int(int x, int y) {
  // CHECK-LABEL: define i32 @test_mul_overflow_int_int_int
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  int r;
  if (__builtin_mul_overflow(x, y, &r))
    overflowed();
  return r;
}

int test_add_overflow_uint_int_int(unsigned x, int y) {
  // CHECK-LABEL: define i32 @test_add_overflow_uint_int_int
  // CHECK: [[XE:%.+]] = zext i32 %{{.+}} to i33
  // CHECK: [[YE:%.+]] = sext i32 %{{.+}} to i33
  // CHECK: [[S:%.+]] = call { i33, i1 } @llvm.sadd.with.overflow.i33(i33 [[XE]], i33 [[YE]])
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i33, i1 } [[S]], 0
  // CHECK-DAG: [[C1:%.+]] = extractvalue { i33, i1 } [[S]], 1
  // CHECK: [[QT:%.+]] = trunc i33 [[Q]] to i32
  // CHECK: [[QTE:%.+]] = sext i32 [[QT]] to i33
  // CHECK: [[C2:%.+]] = icmp ne i33 [[Q]], [[QTE]]
  // CHECK: [[C3:%.+]] = or i1 [[C1]], [[C2]]
  // CHECK: store i32 [[QT]], i32*
  // CHECK: br i1 [[C3]]
  int r;
  if (__builtin_add_overflow(x, y, &r))
    overflowed();
  return r;
}

_Bool test_add_overflow_uint_uint_bool(unsigned x, unsigned y) {
  // CHECK-LABEL: define {{.*}} i1 @test_add_overflow_uint_uint_bool
  // CHECK-NOT: ext
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK-DAG: [[C1:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK: [[QT:%.+]] = trunc i32 [[Q]] to i1
  // CHECK: [[QTE:%.+]] = zext i1 [[QT]] to i32
  // CHECK: [[C2:%.+]] = icmp ne i32 [[Q]], [[QTE]]
  // CHECK: [[C3:%.+]] = or i1 [[C1]], [[C2]]
  // CHECK: [[QT2:%.+]] = zext i1 [[QT]] to i8
  // CHECK: store i8 [[QT2]], i8*
  // CHECK: br i1 [[C3]]
  _Bool r;
  if (__builtin_add_overflow(x, y, &r))
    overflowed();
  return r;
}

unsigned test_add_overflow_bool_bool_uint(_Bool x, _Bool y) {
  // CHECK-LABEL: define i32 @test_add_overflow_bool_bool_uint
  // CHECK: [[XE:%.+]] = zext i1 %{{.+}} to i32
  // CHECK: [[YE:%.+]] = zext i1 %{{.+}} to i32
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[XE]], i32 [[YE]])
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK: store i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  unsigned r;
  if (__builtin_add_overflow(x, y, &r))
    overflowed();
  return r;
}

_Bool test_add_overflow_bool_bool_bool(_Bool x, _Bool y) {
  // CHECK-LABEL: define {{.*}} i1 @test_add_overflow_bool_bool_bool
  // CHECK: [[S:%.+]] = call { i1, i1 } @llvm.uadd.with.overflow.i1(i1 %{{.+}}, i1 %{{.+}})
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i1, i1 } [[S]], 0
  // CHECK-DAG: [[C:%.+]] = extractvalue { i1, i1 } [[S]], 1
  // CHECK: [[QT2:%.+]] = zext i1 [[Q]] to i8
  // CHECK: store i8 [[QT2]], i8*
  // CHECK: br i1 [[C]]
  _Bool r;
  if (__builtin_add_overflow(x, y, &r))
    overflowed();
  return r;
}

int test_add_overflow_volatile(int x, int y) {
  // CHECK-LABEL: define i32 @test_add_overflow_volatile
  // CHECK: [[S:%.+]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  // CHECK-DAG: [[Q:%.+]] = extractvalue { i32, i1 } [[S]], 0
  // CHECK-DAG: [[C:%.+]] = extractvalue { i32, i1 } [[S]], 1
  // CHECK: store volatile i32 [[Q]], i32*
  // CHECK: br i1 [[C]]
  volatile int result;
  if (__builtin_add_overflow(x, y, &result))
    overflowed();
  return result;
}

unsigned test_uadd_overflow(unsigned x, unsigned y) {
// CHECK: @test_uadd_overflow
// CHECK: %{{.+}} = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  unsigned result;
  if (__builtin_uadd_overflow(x, y, &result))
    return UnsignedErrorCode;
  return result;
}

unsigned long test_uaddl_overflow(unsigned long x, unsigned long y) {
// CHECK: @test_uaddl_overflow([[UL:i32|i64]] %x
// CHECK: %{{.+}} = call { [[UL]], i1 } @llvm.uadd.with.overflow.[[UL]]([[UL]] %{{.+}}, [[UL]] %{{.+}})
  unsigned long result;
  if (__builtin_uaddl_overflow(x, y, &result))
    return UnsignedLongErrorCode;
  return result;
}

unsigned long long test_uaddll_overflow(unsigned long long x, unsigned long long y) {
// CHECK: @test_uaddll_overflow
// CHECK: %{{.+}} = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %{{.+}}, i64 %{{.+}})
  unsigned long long result;
  if (__builtin_uaddll_overflow(x, y, &result))
    return UnsignedLongLongErrorCode;
  return result;
}

unsigned test_usub_overflow(unsigned x, unsigned y) {
// CHECK: @test_usub_overflow
// CHECK: %{{.+}} = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  unsigned result;
  if (__builtin_usub_overflow(x, y, &result))
    return UnsignedErrorCode;
  return result;
}

unsigned long test_usubl_overflow(unsigned long x, unsigned long y) {
// CHECK: @test_usubl_overflow([[UL:i32|i64]] %x
// CHECK: %{{.+}} = call { [[UL]], i1 } @llvm.usub.with.overflow.[[UL]]([[UL]] %{{.+}}, [[UL]] %{{.+}})
  unsigned long result;
  if (__builtin_usubl_overflow(x, y, &result))
    return UnsignedLongErrorCode;
  return result;
}

unsigned long long test_usubll_overflow(unsigned long long x, unsigned long long y) {
// CHECK: @test_usubll_overflow
// CHECK: %{{.+}} = call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %{{.+}}, i64 %{{.+}})
  unsigned long long result;
  if (__builtin_usubll_overflow(x, y, &result))
    return UnsignedLongLongErrorCode;
  return result;
}

unsigned test_umul_overflow(unsigned x, unsigned y) {
// CHECK: @test_umul_overflow
// CHECK: %{{.+}} = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  unsigned result;
  if (__builtin_umul_overflow(x, y, &result))
    return UnsignedErrorCode;
  return result;
}

unsigned long test_umull_overflow(unsigned long x, unsigned long y) {
// CHECK: @test_umull_overflow([[UL:i32|i64]] %x
// CHECK: %{{.+}} = call { [[UL]], i1 } @llvm.umul.with.overflow.[[UL]]([[UL]] %{{.+}}, [[UL]] %{{.+}})
  unsigned long result;
  if (__builtin_umull_overflow(x, y, &result))
    return UnsignedLongErrorCode;
  return result;
}

unsigned long long test_umulll_overflow(unsigned long long x, unsigned long long y) {
// CHECK: @test_umulll_overflow
// CHECK: %{{.+}} = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %{{.+}}, i64 %{{.+}})
  unsigned long long result;
  if (__builtin_umulll_overflow(x, y, &result))
    return UnsignedLongLongErrorCode;
  return result;
}

int test_sadd_overflow(int x, int y) {
// CHECK: @test_sadd_overflow
// CHECK: %{{.+}} = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  int result;
  if (__builtin_sadd_overflow(x, y, &result))
    return IntErrorCode;
  return result;
}

long test_saddl_overflow(long x, long y) {
// CHECK: @test_saddl_overflow([[UL:i32|i64]] %x
// CHECK: %{{.+}} = call { [[UL]], i1 } @llvm.sadd.with.overflow.[[UL]]([[UL]] %{{.+}}, [[UL]] %{{.+}})
  long result;
  if (__builtin_saddl_overflow(x, y, &result))
    return LongErrorCode;
  return result;
}

long long test_saddll_overflow(long long x, long long y) {
// CHECK: @test_saddll_overflow
// CHECK: %{{.+}} = call { i64, i1 } @llvm.sadd.with.overflow.i64(i64 %{{.+}}, i64 %{{.+}})
  long long result;
  if (__builtin_saddll_overflow(x, y, &result))
    return LongLongErrorCode;
  return result;
}

int test_ssub_overflow(int x, int y) {
// CHECK: @test_ssub_overflow
// CHECK: %{{.+}} = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  int result;
  if (__builtin_ssub_overflow(x, y, &result))
    return IntErrorCode;
  return result;
}

long test_ssubl_overflow(long x, long y) {
// CHECK: @test_ssubl_overflow([[UL:i32|i64]] %x
// CHECK: %{{.+}} = call { [[UL]], i1 } @llvm.ssub.with.overflow.[[UL]]([[UL]] %{{.+}}, [[UL]] %{{.+}})
  long result;
  if (__builtin_ssubl_overflow(x, y, &result))
    return LongErrorCode;
  return result;
}

long long test_ssubll_overflow(long long x, long long y) {
// CHECK: @test_ssubll_overflow
// CHECK: %{{.+}} = call { i64, i1 } @llvm.ssub.with.overflow.i64(i64 %{{.+}}, i64 %{{.+}})
  long long result;
  if (__builtin_ssubll_overflow(x, y, &result))
    return LongLongErrorCode;
  return result;
}

int test_smul_overflow(int x, int y) {
// CHECK: @test_smul_overflow
// CHECK: %{{.+}} = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %{{.+}}, i32 %{{.+}})
  int result;
  if (__builtin_smul_overflow(x, y, &result))
    return IntErrorCode;
  return result;
}

long test_smull_overflow(long x, long y) {
// CHECK: @test_smull_overflow([[UL:i32|i64]] %x
// CHECK: %{{.+}} = call { [[UL]], i1 } @llvm.smul.with.overflow.[[UL]]([[UL]] %{{.+}}, [[UL]] %{{.+}})
  long result;
  if (__builtin_smull_overflow(x, y, &result))
    return LongErrorCode;
  return result;
}

long long test_smulll_overflow(long long x, long long y) {
// CHECK: @test_smulll_overflow
// CHECK: %{{.+}} = call { i64, i1 } @llvm.smul.with.overflow.i64(i64 %{{.+}}, i64 %{{.+}})
  long long result;
  if (__builtin_smulll_overflow(x, y, &result))
    return LongLongErrorCode;
  return result;
}