#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 my_max(int *, int *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *, int *);
int main(void) {
  int a, b, m;
  printf("Please input two numbers:\n");
  scanf("%d %d", &a, &b);
  printf("a = %d, b = %d.\n", a, b);
  m = my_max(&a, &b);
  printf("The greater number is %d\n", m);
  printf("a = %d, b = %d.\n", a, b);
  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    0xec7(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1050 <scanf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x8(%rbp),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <my_max@plt>
mov    %eax,-0x10(%rbp)
mov    -0x10(%rbp),%esi
lea    0xea3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe7e(%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    0xee1(%rip),%rdi
call   1030 <puts@plt>
lea    0xea4(%rip),%rdi
lea    0xc(%rsp),%rbx
lea    0x8(%rsp),%r14
mov    %rbx,%rsi
mov    %r14,%rdx
call   1060 <scanf@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
lea    0xe86(%rip),%r15
mov    %r15,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    %r14,%rsi
call   1050 <my_max@plt>
lea    0xe7b(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    %r15,%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 = [27 x i8] c"Please input two numbers:\0A\00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [17 x i8] c"a = %d, b = %d.\0A\00"
@.str.3 = [26 x i8] c"The greater number is %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 ([27 x i8], [27 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%7 = load i32, i32* %2
%8 = load i32, i32* %3
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %7, i32 %8)
%10 = call i32 @my_max(i32* %2, i32* %3)
store i32 %10, i32* %4
%11 = load i32, i32* %4
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), i32 %11)
%13 = load i32, i32* %2
%14 = load i32, i32* %3
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %13, i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [17 x i8] c"a = %d, b = %d.\0A\00"
@.str.3 = [26 x i8] c"The greater number is %d\0A\00"
@str = [26 x i8] c"Please input two numbers:\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2)
%7 = load i32, i32* %1
%8 = load i32, i32* %2
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %7, i32 %8)
%10 = call i32 @my_max(i32* %1, i32* %2)
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), i32 %10)
%12 = load i32, i32* %1
%13 = load i32, i32* %2
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %12, i32 %13)
ret i32 0
}