#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 fn_a();
int fn_b(int, int);
int fn_c();
int /*<<< orphan*/ getchar();
int /*<<< orphan*/ printf(char *, ...);
int main() {
  printf("fn_a(): %d\n", fn_a());
  printf("fn_b(): %d\n", fn_b(30, 40));
  printf("fn_c(): %d\n", fn_c());
  printf("\nPress any key to end...");
  getchar();
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0x0,%al
call   1070 <fn_a@plt>
mov    %eax,%esi
lea    0xe91(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x1e,%edi
mov    $0x28,%esi
call   1030 <fn_b@plt>
mov    %eax,%esi
lea    0xe7e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x0,%al
call   1060 <fn_c@plt>
mov    %eax,%esi
lea    0xe73(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe71(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x0,%al
call   1050 <getchar@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
xor    %eax,%eax
call   1070 <fn_a@plt>
lea    0xea1(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0x1e,%edi
mov    $0x28,%esi
call   1030 <fn_b@plt>
lea    0xe8e(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
call   1060 <fn_c@plt>
lea    0xe83(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe7f(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
call   1050 <getchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [12 x i8] c"fn_a(): %d\0A\00"
@.str.1 = [12 x i8] c"fn_b(): %d\0A\00"
@.str.2 = [12 x i8] c"fn_c(): %d\0A\00"
@.str.3 = [25 x i8] c"\0APress any key to end...\00"
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 (...) @fn_a()
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i32 %2)
%4 = call i32 @fn_b(i32 30, i32 40)
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 %4)
%6 = call i32 (...) @fn_c()
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %6)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@.str = [12 x i8] c"fn_a(): %d\0A\00"
@.str.1 = [12 x i8] c"fn_b(): %d\0A\00"
@.str.2 = [12 x i8] c"fn_c(): %d\0A\00"
@.str.3 = [25 x i8] c"\0APress any key to end...\00"
define i32 @main() {
%1 = tail call i32 (...) @fn_a()
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i32 %1)
%3 = tail call i32 @fn_b(i32 30, i32 40)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 %3)
%5 = tail call i32 (...) @fn_c()
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %5)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0))
%8 = tail call i32 (...) @getchar()
ret i32 0
}