#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 add(int, int);
int div(int, int);
int mux(int, int);
int /*<<< orphan*/ printf(char *, int);
int sub(int, int);
int main(void) {
  int a = 20;
  int b = 10;
  printf("a = %d\n", a);
  printf("b = %d\n", b);
  printf("a + b = %d\n", add(a, b));
  printf("a - b = %d\n", sub(a, b));
  printf("a * b = %d\n", mux(a, b));
  printf("a / b = %d\n", div(a, b));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x14,-0x8(%rbp)
movl   $0xa,-0xc(%rbp)
mov    -0x8(%rbp),%esi
lea    0xe89(%rip),%rdi
call   1040 <printf@plt>
mov    -0xc(%rbp),%esi
lea    0xe9e(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1030 <add@plt>
mov    %eax,%esi
lea    0xe69(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1070 <sub@plt>
mov    %eax,%esi
lea    0xe5c(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1060 <mux@plt>
mov    %eax,%esi
lea    0xe4f(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1050 <div@plt>
mov    %eax,%esi
lea    0xe42(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xea8(%rip),%rdi
mov    $0x14,%esi
call   1040 <printf@plt>
lea    0xebb(%rip),%rdi
mov    $0xa,%esi
call   1040 <printf@plt>
mov    $0x14,%edi
mov    $0xa,%esi
call   1030 <add@plt>
lea    0xe7f(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
mov    $0x14,%edi
mov    $0xa,%esi
call   1070 <sub@plt>
lea    0xe6e(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
mov    $0x14,%edi
mov    $0xa,%esi
call   1060 <mux@plt>
lea    0xe5d(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
mov    $0x14,%edi
mov    $0xa,%esi
call   1050 <div@plt>
lea    0xe4c(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [8 x i8] c"a = %d\0A\00"
@.str.1 = [8 x i8] c"b = %d\0A\00"
@.str.2 = [12 x i8] c"a + b = %d\0A\00"
@.str.3 = [12 x i8] c"a - b = %d\0A\00"
@.str.4 = [12 x i8] c"a * b = %d\0A\00"
@.str.5 = [12 x i8] c"a / b = %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 20, i32* %2
store i32 10, i32* %3
%4 = load i32, i32* %2
%5 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 %4)
%6 = load i32, i32* %3
%7 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i32 %6)
%8 = load i32, i32* %2
%9 = load i32, i32* %3
%10 = call i32 @add(i32 %8, i32 %9)
%11 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %10)
%12 = load i32, i32* %2
%13 = load i32, i32* %3
%14 = call i32 @sub(i32 %12, i32 %13)
%15 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0), i32 %14)
%16 = load i32, i32* %2
%17 = load i32, i32* %3
%18 = call i32 @mux(i32 %16, i32 %17)
%19 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.4, i64 0, i64 0), i32 %18)
%20 = load i32, i32* %2
%21 = load i32, i32* %3
%22 = call i32 @div(i32 %20, i32 %21)
%23 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.5, i64 0, i64 0), i32 %22)
ret i32 0
}

LLVM IR (-O2):
@.str = [8 x i8] c"a = %d\0A\00"
@.str.1 = [8 x i8] c"b = %d\0A\00"
@.str.2 = [12 x i8] c"a + b = %d\0A\00"
@.str.3 = [12 x i8] c"a - b = %d\0A\00"
@.str.4 = [12 x i8] c"a * b = %d\0A\00"
@.str.5 = [12 x i8] c"a / b = %d\0A\00"
define i32 @main() {
%1 = tail call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 20)
%2 = tail call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0), i32 10)
%3 = tail call i32 @add(i32 20, i32 10)
%4 = tail call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %3)
%5 = tail call i32 @sub(i32 20, i32 10)
%6 = tail call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0), i32 %5)
%7 = tail call i32 @mux(i32 20, i32 10)
%8 = tail call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.4, i64 0, i64 0), i32 %7)
%9 = tail call i32 @div(i32 20, i32 10)
%10 = tail call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.5, i64 0, i64 0), i32 %9)
ret i32 0
}