#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*/ a();
int atoi(char *);
int /*<<< orphan*/ b();
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  int iterations;
  if (argc != 2) {
    printf("Usage %s <No of Iterations>\n", argv[0]);
    exit(-1);
  } else
    iterations = atoi(argv[1]);
  printf("No of iterations = %d\n", iterations);
  while (iterations--) {
    a();
    b();
  }
}


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   $0x2,-0x8(%rbp)
je     118f <main+0x3f>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xe82(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%esi
lea    0xe74(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x14(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x14(%rbp)
cmp    $0x0,%eax
je     11d7 <main+0x87>
mov    $0x0,%al
call   1050 <a@plt>
mov    $0x0,%al
call   1030 <b@plt>
jmp    11b0 <main+0x60>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    1197 <main+0x47>
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
mov    %eax,%ebx
lea    0xeb5(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
test   %ebx,%ebx
je     1193 <main+0x43>
cs nopw 0x0(%rax,%rax,1)
nop
xor    %eax,%eax
call   1050 <a@plt>
xor    %eax,%eax
call   1030 <b@plt>
add    $0xffffffff,%ebx
jne    1180 <main+0x30>
xor    %eax,%eax
pop    %rbx
ret
mov    (%rsi),%rsi
lea    0xe5f(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [29 x i8] c"Usage %s <No of Iterations>\0A\00"
@.str.1 = [23 x i8] c"No of iterations = %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %15
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = call i32 @exit(i32 -1)
unreachable
15: ; preds = %2
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call i32 @atoi(i8* %18)
store i32 %19, i32* %6
br label %20
20: ; preds = %15
%21 = load i32, i32* %6
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0), i32 %21)
br label %23
23: ; preds = %27, %20
%24 = load i32, i32* %6
%25 = add nsw i32 %24, -1
store i32 %25, i32* %6
%26 = icmp ne i32 %24, 0
br i1 %26, label %27, label %30
27: ; preds = %23
%28 = call i32 (...) @a()
%29 = call i32 (...) @b()
br label %23
30: ; preds = %23
%31 = load i32, i32* %3
ret i32 %31
}

LLVM IR (-O2):
@.str = [29 x i8] c"Usage %s <No of Iterations>\0A\00"
@.str.1 = [23 x i8] c"No of iterations = %d\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0), i8* %5)
%7 = tail call i32 @exit(i32 -1)
unreachable
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32 @atoi(i8* %10)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0), i32 %11)
%13 = icmp eq i32 %11, 0
br i1 %13, label %20, label %14
14: ; preds = %8, %14
%15 = phi i32 [ %16, %14 ], [ %11, %8 ]
%16 = add nsw i32 %15, -1
%17 = tail call i32 (...) @a()
%18 = tail call i32 (...) @b()
%19 = icmp eq i32 %16, 0
br i1 %19, label %20, label %14
20: ; preds = %14, %8
ret i32 0
}