#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*/ printf(char *, ...);
int main(void) {
  printf("%c\n", 'H');
  printf("%c\n", 'e');
  printf("%c\n", 'l');
  printf("%c\n", 'l');
  printf("%c\n", 'o');
  printf("%c%c%c%c%c\n", 'H', 'e', 'l', 'l', 'o');
  printf("%s\n", "Hello world!");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xee2(%rip),%rdi
mov    $0x48,%esi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xecf(%rip),%rdi
mov    $0x65,%esi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebc(%rip),%rdi
mov    $0x6c,%esi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea9(%rip),%rdi
mov    $0x6c,%esi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe96(%rip),%rdi
mov    $0x6f,%esi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe7b(%rip),%rdi
mov    $0x48,%esi
mov    $0x65,%edx
mov    $0x6c,%r8d
mov    $0x6f,%r9d
mov    %r8d,%ecx
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe60(%rip),%rdi
lea    0xe5d(%rip),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xee0(%rip),%rbx
mov    %rbx,%rdi
mov    $0x48,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x65,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x6c,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x6c,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x6f,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe86(%rip),%rdi
mov    $0x48,%esi
mov    $0x65,%edx
mov    $0x6c,%ecx
mov    $0x6c,%r8d
mov    $0x6f,%r9d
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe69(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%c\0A\00"
@.str.1 = [12 x i8] c"%c%c%c%c%c\0A\00"
@.str.2 = [4 x i8] c"%s\0A\00"
@.str.3 = [13 x i8] c"Hello world!\00"
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 72)
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 101)
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 108)
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 108)
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 111)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 72, i32 101, i32 108, i32 108, i32 111)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"%c\0A\00"
@.str.1 = [12 x i8] c"%c%c%c%c%c\0A\00"
@.str.3 = [13 x i8] c"Hello world!\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 72)
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 101)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 108)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 108)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 111)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 72, i32 101, i32 108, i32 108, i32 111)
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}