#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*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *, int *);
int stub3(int, int);
int main() {
  int max(int, int);
  int (*p)(int, int);
  int a, b, c;
  p = max;
  printf("input two  integer number: a,b \n");
  scanf("%d,%d", &a, &b);
  c = (*p)(a, b);
  printf("a=%d,b=%d\nmax= %d\n", a, b, c);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2eaa(%rip),%rax
mov    %rax,-0x10(%rbp)
lea    0xebf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed2(%rip),%rdi
lea    -0x14(%rbp),%rsi
lea    -0x18(%rbp),%rdx
call   1040 <scanf@plt>
mov    -0x10(%rbp),%rax
mov    -0x14(%rbp),%edi
mov    -0x18(%rbp),%esi
call   *%rax
mov    %eax,-0x1c(%rbp)
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%edx
mov    -0x1c(%rbp),%ecx
lea    0xeac(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed1(%rip),%rdi
call   1030 <puts@plt>
lea    0xeac(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
call   1060 <scanf@plt>
mov    0x4(%rsp),%edi
mov    (%rsp),%esi
call   1050 <max@plt>
mov    0x4(%rsp),%esi
mov    (%rsp),%edx
lea    0xe8b(%rip),%rdi
mov    %eax,%ecx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [33 x i8] c"input two integer number: a,b \0A\00"
@.str.1 = [6 x i8] c"%d,%d\00"
@.str.2 = [19 x i8] c"a=%d,b=%d\0Amax= %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32 (i32, i32)*
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 (i32, i32)* @max, i32 (i32, i32)** %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %3, i32* %4)
%8 = load i32 (i32, i32)*, i32 (i32, i32)** %2
%9 = load i32, i32* %3
%10 = load i32, i32* %4
%11 = call i32 %8(i32 %9, i32 %10)
store i32 %11, i32* %5
%12 = load i32, i32* %3
%13 = load i32, i32* %4
%14 = load i32, i32* %5
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i32 %12, i32 %13, i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [6 x i8] c"%d,%d\00"
@.str.2 = [19 x i8] c"a=%d,b=%d\0Amax= %d\0A\00"
@str = [32 x i8] c"input two integer number: a,b \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 ([32 x i8], [32 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 @max(i32 %7, i32 %8)
%10 = load i32, i32* %1
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i32 %10, i32 %11, i32 %9)
ret i32 0
}