#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*/ msgbox(char *);
int /*<<< orphan*/ msgbox2(char *, char *);
int /*<<< orphan*/ printf(char *);
int main(int argv, char *argc[]) {
  printf("Invoking msgbox()\n");
  msgbox("This is a message!");
  printf("Return from msgbox()\n");
  printf("Invoking msgbox2()\n");
  msgbox2("This is the title...", "...and this is the message");
  printf("Return from msgbox2()\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
call   1030 <printf@plt>
lea    0xeba(%rip),%rdi
call   1050 <msgbox@plt>
lea    0xec1(%rip),%rdi
call   1030 <printf@plt>
lea    0xecb(%rip),%rdi
call   1030 <printf@plt>
lea    0xed3(%rip),%rdi
lea    0xee1(%rip),%rsi
call   1040 <msgbox2@plt>
lea    0xef0(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xf0b(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
call   1050 <msgbox@plt>
lea    0xf05(%rip),%rdi
call   1030 <puts@plt>
lea    0xf0e(%rip),%rdi
call   1030 <puts@plt>
lea    0xeab(%rip),%rdi
lea    0xeb9(%rip),%rsi
call   1040 <msgbox2@plt>
lea    0xf02(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [19 x i8] c"Invoking msgbox()\0A\00"
@.str.1 = [19 x i8] c"This is a message!\00"
@.str.2 = [22 x i8] c"Return from msgbox()\0A\00"
@.str.3 = [20 x i8] c"Invoking msgbox2()\0A\00"
@.str.4 = [21 x i8] c"This is the title...\00"
@.str.5 = [27 x i8] c"...and this is the message\00"
@.str.6 = [23 x i8] c"Return from msgbox2()\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @msgbox(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
%10 = call i32 @msgbox2(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0), i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.5, i64 0, i64 0))
%11 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.6, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [19 x i8] c"This is a message!\00"
@.str.4 = [21 x i8] c"This is the title...\00"
@.str.5 = [27 x i8] c"...and this is the message\00"
@str = [18 x i8] c"Invoking msgbox()\00"
@str.7 = [21 x i8] c"Return from msgbox()\00"
@str.8 = [19 x i8] c"Invoking msgbox2()\00"
@str.9 = [22 x i8] c"Return from msgbox2()\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 @msgbox(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.7, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str.8, i64 0, i64 0))
%7 = tail call i32 @msgbox2(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0), i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.5, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.9, i64 0, i64 0))
ret i32 0
}