clang/test/CodeGen/compound-assign-overflow.c

// Verify proper type emitted for compound assignments
// RUN: %clang_cc1 -ffreestanding -triple x86_64-apple-darwin10 -emit-llvm -o - %s  -fsanitize=signed-integer-overflow,unsigned-integer-overflow | FileCheck %s

#include <stdint.h>

// CHECK: @[[INT:.*]] = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" }
// CHECK: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} @[[INT]]
// CHECK: @[[UINT:.*]] = private unnamed_addr constant { i16, i16, [15 x i8] } { i16 0, i16 10, [15 x i8] c"'unsigned int'\00" }
// CHECK: @[[LINE_200:.*]] = private unnamed_addr global {{.*}}, i32 200, i32 5 {{.*}} @[[UINT]]
// CHECK: @[[LINE_300:.*]] = private unnamed_addr global {{.*}}, i32 300, i32 5 {{.*}} @[[INT]]

int32_t x;

// CHECK: @compaddsigned
void compaddsigned() {
#line 100
  x += ((int32_t)1);
  // CHECK: @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), {{.*}})
}

// CHECK: @compaddunsigned
void compaddunsigned() {
#line 200
  x += ((uint32_t)1U);
  // CHECK: @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), {{.*}})
}

int8_t a, b;

// CHECK: @compdiv
void compdiv() {
#line 300
  a /= b;
  // CHECK: @__ubsan_handle_divrem_overflow(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), {{.*}})
}