#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 atoi(char *);
int get_gcd(int, int);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char *argv[]) {
  int a, b;
  if (argc < 3) {
    printf("less argument\n");
    return -1;
  }
  a = atoi(argv[1]);
  b = atoi(argv[2]);
  printf("%d, %d = %d\n", a, b, get_gcd(a, b));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
jge    116a <main+0x3a>
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11be <main+0x8e>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
call   1050 <atoi@plt>
mov    %eax,-0x18(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x20(%rbp)
mov    -0x18(%rbp),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x14(%rbp),%edi
mov    -0x18(%rbp),%esi
call   1040 <get_gcd@plt>
mov    -0x20(%rbp),%esi
mov    -0x1c(%rbp),%edx
mov    %eax,%ecx
lea    0xe5f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
cmp    $0x2,%edi
jg     115c <main+0x1c>
lea    0xebd(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffff,%ebx
jmp    1197 <main+0x57>
mov    %rsi,%rbx
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
mov    %eax,%r14d
mov    0x10(%rbx),%rdi
call   1060 <atoi@plt>
mov    %eax,%ebp
mov    %r14d,%edi
mov    %eax,%esi
call   1050 <get_gcd@plt>
lea    0xe79(%rip),%rdi
xor    %ebx,%ebx
mov    %r14d,%esi
mov    %ebp,%edx
mov    %eax,%ecx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebx,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [15 x i8] c"less argument\0A\00"
@.str.1 = [13 x i8] c"%d, %d = %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %8, 3
br i1 %9, label %10, label %12
10: ; preds = %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %27
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = call i32 @atoi(i8* %15)
store i32 %16, i32* %6
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 2
%19 = load i8*, i8** %18
%20 = call i32 @atoi(i8* %19)
store i32 %20, i32* %7
%21 = load i32, i32* %6
%22 = load i32, i32* %7
%23 = load i32, i32* %6
%24 = load i32, i32* %7
%25 = call i32 @get_gcd(i32 %23, i32 %24)
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 %21, i32 %22, i32 %25)
store i32 0, i32* %3
br label %27
27: ; preds = %12, %10
%28 = load i32, i32* %3
ret i32 %28
}

LLVM IR (-O2):
@.str.1 = [13 x i8] c"%d, %d = %d\0A\00"
@str = [14 x i8] c"less argument\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 3
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
br label %15
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i32 @atoi(i8* %8)
%10 = getelementptr inbounds i8*, i8** %1, i64 2
%11 = load i8*, i8** %10
%12 = tail call i32 @atoi(i8* %11)
%13 = tail call i32 @get_gcd(i32 %9, i32 %12)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 %9, i32 %12, i32 %13)
br label %15
15: ; preds = %6, %4
%16 = phi i32 [ -1, %4 ], [ 0, %6 ]
ret i32 %16
}