#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*/ putchar(char);
int main(int argc, const char **argv) {
  char *str = "Hello, World!\n";
  for (int i = 0; str[i]; ++i) {
    putchar(str[i]);
  }
  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)
lea    0xed3(%rip),%rax
mov    %rax,-0x18(%rbp)
movl   $0x0,-0x1c(%rbp)
mov    -0x18(%rbp),%rax
movslq -0x1c(%rbp),%rcx
cmpb   $0x0,(%rax,%rcx,1)
je     1169 <main+0x59>
mov    -0x18(%rbp),%rax
movslq -0x1c(%rbp),%rcx
movsbl (%rax,%rcx,1),%edi
call   1030 <putchar@plt>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    1138 <main+0x28>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
mov    $0x48,%edi
call   1030 <putchar@plt>
mov    $0x65,%edi
call   1030 <putchar@plt>
mov    $0x6c,%edi
call   1030 <putchar@plt>
mov    $0x6c,%edi
call   1030 <putchar@plt>
mov    $0x6f,%edi
call   1030 <putchar@plt>
mov    $0x2c,%edi
call   1030 <putchar@plt>
mov    $0x20,%edi
call   1030 <putchar@plt>
mov    $0x57,%edi
call   1030 <putchar@plt>
mov    $0x6f,%edi
call   1030 <putchar@plt>
mov    $0x72,%edi
call   1030 <putchar@plt>
mov    $0x6c,%edi
call   1030 <putchar@plt>
mov    $0x64,%edi
call   1030 <putchar@plt>
mov    $0x21,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"Hello, World!\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8*
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0), i8** %6
store i32 0, i32* %7
br label %8
8: ; preds = %22, %2
%9 = load i8*, i8** %6
%10 = load i32, i32* %7
%11 = sext i32 %10 to i64
%12 = getelementptr inbounds i8, i8* %9, i64 %11
%13 = load i8, i8* %12
%14 = icmp ne i8 %13, 0
br i1 %14, label %15, label %25
15: ; preds = %8
%16 = load i8*, i8** %6
%17 = load i32, i32* %7
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds i8, i8* %16, i64 %18
%20 = load i8, i8* %19
%21 = call i32 @putchar(i8 signext %20)
br label %22
22: ; preds = %15
%23 = load i32, i32* %7
%24 = add nsw i32 %23, 1
store i32 %24, i32* %7
br label %8
25: ; preds = %8
ret i32 0
}

LLVM IR (-O2):
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @putchar(i8 signext 72)
%4 = tail call i32 @putchar(i8 signext 101)
%5 = tail call i32 @putchar(i8 signext 108)
%6 = tail call i32 @putchar(i8 signext 108)
%7 = tail call i32 @putchar(i8 signext 111)
%8 = tail call i32 @putchar(i8 signext 44)
%9 = tail call i32 @putchar(i8 signext 32)
%10 = tail call i32 @putchar(i8 signext 87)
%11 = tail call i32 @putchar(i8 signext 111)
%12 = tail call i32 @putchar(i8 signext 114)
%13 = tail call i32 @putchar(i8 signext 108)
%14 = tail call i32 @putchar(i8 signext 100)
%15 = tail call i32 @putchar(i8 signext 33)
%16 = tail call i32 @putchar(i8 signext 10)
ret i32 0
}