#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("FFFF converts to %u\n", htoi("FFFF"));
  printf("0xFFFF converts to %u\n", htoi("0xFFFF"));
  printf("ABCD converts to %u\n", htoi("ABCD"));
  printf("0xFFFFFFFF converts to %u\n", htoi("0xFFFFFFFF"));
  printf("converting an empty string yields %u\n", htoi(""));
  printf("0 converts to %u\n", htoi("0"));
  printf("0A converts to %u\n", htoi("0A"));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xf23(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xefa(%rip),%rdi
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xea2(%rip),%rdi
call   1030 <printf@plt>
lea    0xec9(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xea6(%rip),%rdi
call   1030 <printf@plt>
lea    0xecf(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xea6(%rip),%rdi
call   1030 <printf@plt>
lea    0xef7(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xeb2(%rip),%rdi
call   1030 <printf@plt>
lea    0xede(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xebe(%rip),%rdi
call   1030 <printf@plt>
lea    0xed9(%rip),%rdi
call   1040 <htoi@plt>
mov    %eax,%esi
lea    0xeb8(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xf31(%rip),%rdi
call   1040 <htoi@plt>
lea    0xf0a(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xed5(%rip),%rdi
call   1040 <htoi@plt>
lea    0xeb2(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xed7(%rip),%rdi
call   1040 <htoi@plt>
lea    0xeb6(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xedd(%rip),%rdi
call   1040 <htoi@plt>
lea    0xeb6(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xf05(%rip),%rdi
call   1040 <htoi@plt>
lea    0xec2(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xeec(%rip),%rdi
call   1040 <htoi@plt>
lea    0xece(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xee7(%rip),%rdi
call   1040 <htoi@plt>
lea    0xec8(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"FFFF converts to %u\0A\00"
@.str.1 = [5 x i8] c"FFFF\00"
@.str.2 = [23 x i8] c"0xFFFF converts to %u\0A\00"
@.str.3 = [7 x i8] c"0xFFFF\00"
@.str.4 = [21 x i8] c"ABCD converts to %u\0A\00"
@.str.5 = [5 x i8] c"ABCD\00"
@.str.6 = [27 x i8] c"0xFFFFFFFF converts to %u\0A\00"
@.str.7 = [11 x i8] c"0xFFFFFFFF\00"
@.str.8 = [38 x i8] c"converting an empty string yields %u\0A\00"
@.str.9 = [1 x i8] zeroinitializer
@.str.10 = [18 x i8] c"0 converts to %u\0A\00"
@.str.11 = [2 x i8] c"0\00"
@.str.12 = [19 x i8] c"0A converts to %u\0A\00"
@.str.13 = [3 x i8] c"0A\00"
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i32 %2)
%4 = call i32 @htoi(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0), i32 %4)
%6 = call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0), i32 %6)
%8 = call i32 @htoi(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.7, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.6, i64 0, i64 0), i32 %8)
%10 = call i32 @htoi(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.9, i64 0, i64 0))
%11 = call i32 @printf(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.8, i64 0, i64 0), i32 %10)
%12 = call i32 @htoi(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.11, i64 0, i64 0))
%13 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.10, i64 0, i64 0), i32 %12)
%14 = call i32 @htoi(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.13, i64 0, i64 0))
%15 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.12, i64 0, i64 0), i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str = [21 x i8] c"FFFF converts to %u\0A\00"
@.str.1 = [5 x i8] c"FFFF\00"
@.str.2 = [23 x i8] c"0xFFFF converts to %u\0A\00"
@.str.3 = [7 x i8] c"0xFFFF\00"
@.str.4 = [21 x i8] c"ABCD converts to %u\0A\00"
@.str.5 = [5 x i8] c"ABCD\00"
@.str.6 = [27 x i8] c"0xFFFFFFFF converts to %u\0A\00"
@.str.7 = [11 x i8] c"0xFFFFFFFF\00"
@.str.8 = [38 x i8] c"converting an empty string yields %u\0A\00"
@.str.9 = [1 x i8] zeroinitializer
@.str.10 = [18 x i8] c"0 converts to %u\0A\00"
@.str.11 = [2 x i8] c"0\00"
@.str.12 = [19 x i8] c"0A converts to %u\0A\00"
@.str.13 = [3 x i8] c"0A\00"
define i32 @main() {
%1 = tail call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%2 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), i32 %1)
%3 = tail call i32 @htoi(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0), i32 %3)
%5 = tail call i32 @htoi(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0))
%6 = tail call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0), i32 %5)
%7 = tail call i32 @htoi(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.7, i64 0, i64 0))
%8 = tail call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.6, i64 0, i64 0), i32 %7)
%9 = tail call i32 @htoi(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.9, i64 0, i64 0))
%10 = tail call i32 @printf(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.8, i64 0, i64 0), i32 %9)
%11 = tail call i32 @htoi(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.11, i64 0, i64 0))
%12 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.10, i64 0, i64 0), i32 %11)
%13 = tail call i32 @htoi(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.13, i64 0, i64 0))
%14 = tail call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.12, i64 0, i64 0), i32 %13)
ret i32 0
}