#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 htoi(char *);
int /*<<< orphan*/ printf(char *, int);
int main(void) {
  printf("%d\n", htoi("ff"));
  printf("%d\n", htoi("FF"));
  printf("%d\n", htoi("0xff"));
  printf("%d\n", htoi("0XFF"));
  printf("%d\n", htoi("11141720"));
  printf("%d\n", htoi("0X11141720"));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
lea    0xedb(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xec7(%rip),%rdi
call   1030 <printf@plt>
lea    0xec6(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xead(%rip),%rdi
call   1030 <printf@plt>
lea    0xea5(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xe93(%rip),%rdi
call   1030 <printf@plt>
lea    0xe90(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xe79(%rip),%rdi
call   1030 <printf@plt>
lea    0xe7d(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xe5f(%rip),%rdi
call   1030 <printf@plt>
lea    0xe61(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xe45(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xede(%rip),%rdi
call   1040 <htoi@plt>
lea    0xecc(%rip),%rbx
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xec6(%rip),%rdi
call   1040 <htoi@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xea9(%rip),%rdi
call   1040 <htoi@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xe98(%rip),%rdi
call   1040 <htoi@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xe89(%rip),%rdi
call   1040 <htoi@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xe71(%rip),%rdi
call   1040 <htoi@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%d\0A\00"
@.str.1 = [3 x i8] c"ff\00"
@.str.2 = [3 x i8] c"FF\00"
@.str.3 = [5 x i8] c"0xff\00"
@.str.4 = [5 x i8] c"0XFF\00"
@.str.5 = [9 x i8] c"11141720\00"
@.str.6 = [11 x i8] c"0X11141720\00"
define i32 @main() {
%1 = call i32 @htoi(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %1)
%3 = call i32 @htoi(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = call i32 @htoi(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0))
%10 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = call i32 @htoi(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i64 0, i64 0))
%12 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %11)
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"%d\0A\00"
@.str.1 = [3 x i8] c"ff\00"
@.str.2 = [3 x i8] c"FF\00"
@.str.3 = [5 x i8] c"0xff\00"
@.str.4 = [5 x i8] c"0XFF\00"
@.str.5 = [9 x i8] c"11141720\00"
@.str.6 = [11 x i8] c"0X11141720\00"
define i32 @main() {
%1 = tail call i32 @htoi(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%2 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %1)
%3 = tail call i32 @htoi(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = tail call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
%6 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = tail call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0))
%8 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = tail call i32 @htoi(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0))
%10 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = tail call i32 @htoi(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i64 0, i64 0))
%12 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %11)
ret i32 0
}