#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ Pass_by_reference(int *, int *, int *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *, int *, int *);
int main(void) {
  int x, y, z;
  printf("Enter three ints\n");
  scanf("%d%d%d", &x, &y, &z);
  printf("In main, x = %d, y = %d, z = %d\n\n", x, y, z);
  Pass_by_reference(&x, &y, &z);
  printf("In main, x = %d, y = %d, z = %d\n", x, y, z);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebe(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
lea    -0x10(%rbp),%rcx
call   1050 <scanf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x10(%rbp),%ecx
lea    0xea4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x8(%rbp),%rdi
lea    -0xc(%rbp),%rsi
lea    -0x10(%rbp),%rdx
call   1040 <Pass_by_reference@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x10(%rbp),%ecx
lea    0xe9e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xefa(%rip),%rdi
call   1030 <puts@plt>
lea    0xea4(%rip),%rdi
lea    0xc(%rsp),%rbx
lea    0x8(%rsp),%r14
lea    0x4(%rsp),%r15
mov    %rbx,%rsi
mov    %r14,%rdx
mov    %r15,%rcx
call   1060 <scanf@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    0x4(%rsp),%ecx
lea    0xe7b(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    %r14,%rsi
mov    %r15,%rdx
call   1050 <Pass_by_reference@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    0x4(%rsp),%ecx
lea    0xe75(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [18 x i8] c"Enter three ints\0A\00"
@.str.1 = [7 x i8] c"%d%d%d\00"
@.str.2 = [34 x i8] c"In main, x = %d, y = %d, z = %d\0A\0A\00"
@.str.3 = [33 x i8] c"In main, x = %d, y = %d, z = %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3, i32* %4)
%7 = load i32, i32* %2
%8 = load i32, i32* %3
%9 = load i32, i32* %4
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0), i32 %7, i32 %8, i32 %9)
%11 = call i32 @Pass_by_reference(i32* %2, i32* %3, i32* %4)
%12 = load i32, i32* %2
%13 = load i32, i32* %3
%14 = load i32, i32* %4
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.3, i64 0, i64 0), i32 %12, i32 %13, i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [7 x i8] c"%d%d%d\00"
@.str.2 = [34 x i8] c"In main, x = %d, y = %d, z = %d\0A\0A\00"
@.str.3 = [33 x i8] c"In main, x = %d, y = %d, z = %d\0A\00"
@str = [17 x i8] c"Enter three ints\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = bitcast i32* %1 to i8*
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2, i32* %3)
%9 = load i32, i32* %1
%10 = load i32, i32* %2
%11 = load i32, i32* %3
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0), i32 %9, i32 %10, i32 %11)
%13 = call i32 @Pass_by_reference(i32* %1, i32* %2, i32* %3)
%14 = load i32, i32* %1
%15 = load i32, i32* %2
%16 = load i32, i32* %3
%17 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @.str.3, i64 0, i64 0), i32 %14, i32 %15, i32 %16)
ret i32 0
}