#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 /*<<< orphan*/ putchar(char);
int main() {
  char ch;
  for (ch = 'A'; ch <= 'Z'; ch++)
    putchar(ch);
  printf("\n");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movb   $0x41,-0x5(%rbp)
movsbl -0x5(%rbp),%eax
cmp    $0x5a,%eax
jg     1156 <main+0x36>
movsbl -0x5(%rbp),%edi
call   1030 <putchar@plt>
mov    -0x5(%rbp),%al
add    $0x1,%al
mov    %al,-0x5(%rbp)
jmp    1133 <main+0x13>
lea    0xea3(%rip),%rdi
call   1040 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
mov    $0x41,%edi
call   1030 <putchar@plt>
mov    $0x42,%edi
call   1030 <putchar@plt>
mov    $0x43,%edi
call   1030 <putchar@plt>
mov    $0x44,%edi
call   1030 <putchar@plt>
mov    $0x45,%edi
call   1030 <putchar@plt>
mov    $0x46,%edi
call   1030 <putchar@plt>
mov    $0x47,%edi
call   1030 <putchar@plt>
mov    $0x48,%edi
call   1030 <putchar@plt>
mov    $0x49,%edi
call   1030 <putchar@plt>
mov    $0x4a,%edi
call   1030 <putchar@plt>
mov    $0x4b,%edi
call   1030 <putchar@plt>
mov    $0x4c,%edi
call   1030 <putchar@plt>
mov    $0x4d,%edi
call   1030 <putchar@plt>
mov    $0x4e,%edi
call   1030 <putchar@plt>
mov    $0x4f,%edi
call   1030 <putchar@plt>
mov    $0x50,%edi
call   1030 <putchar@plt>
mov    $0x51,%edi
call   1030 <putchar@plt>
mov    $0x52,%edi
call   1030 <putchar@plt>
mov    $0x53,%edi
call   1030 <putchar@plt>
mov    $0x54,%edi
call   1030 <putchar@plt>
mov    $0x55,%edi
call   1030 <putchar@plt>
mov    $0x56,%edi
call   1030 <putchar@plt>
mov    $0x57,%edi
call   1030 <putchar@plt>
mov    $0x58,%edi
call   1030 <putchar@plt>
mov    $0x59,%edi
call   1030 <putchar@plt>
mov    $0x5a,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
store i8 65, i8* %2
br label %3
3: ; preds = %10, %0
%4 = load i8, i8* %2
%5 = sext i8 %4 to i32
%6 = icmp sle i32 %5, 90
br i1 %6, label %7, label %13
7: ; preds = %3
%8 = load i8, i8* %2
%9 = call i32 @putchar(i8 signext %8)
br label %10
10: ; preds = %7
%11 = load i8, i8* %2
%12 = add i8 %11, 1
store i8 %12, i8* %2
br label %3
13: ; preds = %3
%14 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%15 = load i32, i32* %1
ret i32 %15
}

LLVM IR (-O2):
define i32 @main() {
%1 = tail call i32 @putchar(i8 signext 65)
%2 = tail call i32 @putchar(i8 signext 66)
%3 = tail call i32 @putchar(i8 signext 67)
%4 = tail call i32 @putchar(i8 signext 68)
%5 = tail call i32 @putchar(i8 signext 69)
%6 = tail call i32 @putchar(i8 signext 70)
%7 = tail call i32 @putchar(i8 signext 71)
%8 = tail call i32 @putchar(i8 signext 72)
%9 = tail call i32 @putchar(i8 signext 73)
%10 = tail call i32 @putchar(i8 signext 74)
%11 = tail call i32 @putchar(i8 signext 75)
%12 = tail call i32 @putchar(i8 signext 76)
%13 = tail call i32 @putchar(i8 signext 77)
%14 = tail call i32 @putchar(i8 signext 78)
%15 = tail call i32 @putchar(i8 signext 79)
%16 = tail call i32 @putchar(i8 signext 80)
%17 = tail call i32 @putchar(i8 signext 81)
%18 = tail call i32 @putchar(i8 signext 82)
%19 = tail call i32 @putchar(i8 signext 83)
%20 = tail call i32 @putchar(i8 signext 84)
%21 = tail call i32 @putchar(i8 signext 85)
%22 = tail call i32 @putchar(i8 signext 86)
%23 = tail call i32 @putchar(i8 signext 87)
%24 = tail call i32 @putchar(i8 signext 88)
%25 = tail call i32 @putchar(i8 signext 89)
%26 = tail call i32 @putchar(i8 signext 90)
%27 = tail call i32 bitcast (i32 (i8)* @putchar to i32 (i32)*)(i32 10)
ret i32 0
}