#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 gcd(int, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int a, b;
  printf("a = ");
  scanf("%d", &a);
  printf("b = ");
  scanf("%d", &b);
  if (b > a) {
    int oldValue = a;
    a = b;
    b = oldValue;
  }
  int result = gcd(a, b);
  printf("gcd(%d, %d) = %d", a, b, result);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec4(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea6(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jle    1199 <main+0x69>
mov    -0x8(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x10(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1050 <gcd@plt>
mov    %eax,-0x14(%rbp)
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
mov    -0x14(%rbp),%ecx
lea    0xe53(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xece(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xea7(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
mov    0x8(%rsp),%edi
mov    0xc(%rsp),%eax
cmp    %eax,%edi
jle    118a <main+0x5a>
mov    %edi,0xc(%rsp)
mov    %eax,0x8(%rsp)
mov    %eax,%esi
jmp    118e <main+0x5e>
mov    %edi,%esi
mov    %eax,%edi
call   1050 <gcd@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
lea    0xe68(%rip),%rdi
mov    %eax,%ecx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [5 x i8] c"a = \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [5 x i8] c"b = \00"
@.str.3 = [17 x i8] c"gcd(%d, %d) = %d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%10 = load i32, i32* %3
%11 = load i32, i32* %2
%12 = icmp sgt i32 %10, %11
br i1 %12, label %13, label %17
13: ; preds = %0
%14 = load i32, i32* %2
store i32 %14, i32* %4
%15 = load i32, i32* %3
store i32 %15, i32* %2
%16 = load i32, i32* %4
store i32 %16, i32* %3
br label %17
17: ; preds = %13, %0
%18 = load i32, i32* %2
%19 = load i32, i32* %3
%20 = call i32 @gcd(i32 %18, i32 %19)
store i32 %20, i32* %5
%21 = load i32, i32* %2
%22 = load i32, i32* %3
%23 = load i32, i32* %5
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 %21, i32 %22, i32 %23)
ret i32 0
}

LLVM IR (-O2):
@.str = [5 x i8] c"a = \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [5 x i8] c"b = \00"
@.str.3 = [17 x i8] c"gcd(%d, %d) = %d\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 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%9 = load i32, i32* %2
%10 = load i32, i32* %1
%11 = icmp sgt i32 %9, %10
br i1 %11, label %12, label %13
12: ; preds = %0
store i32 %9, i32* %1
store i32 %10, i32* %2
br label %13
13: ; preds = %12, %0
%14 = phi i32 [ %10, %12 ], [ %9, %0 ]
%15 = phi i32 [ %9, %12 ], [ %10, %0 ]
%16 = call i32 @gcd(i32 %15, i32 %14)
%17 = load i32, i32* %1
%18 = load i32, i32* %2
%19 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 %17, i32 %18, i32 %16)
ret i32 0
}