text: // RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
  
  // PR8839
  extern "C" char memmove();
  
  int main() {
    // CHECK: call {{signext i8|i8}} @memmove()
    return memmove();
  }
  
  struct S;
  // CHECK: define {{.*}} @_Z9addressofbR1SS0_(
  S *addressof(bool b, S &s, S &t) {
    // CHECK: %[[LVALUE:.*]] = phi
    // CHECK: ret {{.*}}* %[[LVALUE]]
    return __builtin_addressof(b ? s : t);
  }
  
  extern "C" int __builtin_abs(int); // #1
  long __builtin_abs(long);          // #2
  extern "C" int __builtin_abs(int); // #3
  
  int x = __builtin_abs(-2);
  // CHECK:  store i32 2, i32* @x, align 4
  
  long y = __builtin_abs(-2l);
  // CHECK:  [[Y:%.+]] = call i64 @_Z13__builtin_absl(i64 -2)
  // CHECK:  store i64 [[Y]], i64* @y, align 8
  
  extern const char char_memchr_arg[32];
  char *memchr_result = __builtin_char_memchr(char_memchr_arg, 123, 32);
  // CHECK: call i8* @memchr(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @char_memchr_arg, i32 0, i32 0), i32 123, i64 32)
  
  int constexpr_overflow_result() {
    constexpr int x = 1;
    // CHECK: alloca i32
    constexpr int y = 2;
    // CHECK: alloca i32
    int z;
    // CHECK: [[Z:%.+]] = alloca i32
  
    __builtin_sadd_overflow(x, y, &z);
    return z;
    // CHECK: [[RET_PTR:%.+]] = extractvalue { i32, i1 } %0, 0
    // CHECK: store i32 [[RET_PTR]], i32* [[Z]]
    // CHECK: [[RET_VAL:%.+]] = load i32, i32* [[Z]]
    // CHECK: ret i32 [[RET_VAL]]
  }
  