#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 strlen(char *);
void printCharArray(char *pdata) {
  int i, length = strlen(pdata);
  for (i = 0; i < length; i++) {
    printf("%3d", i);
  }
  printf("\n");
  for (i = 0; i < length; i++) {
    printf("%3c", *(pdata + i));
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<printCharArray>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x10(%rbp)
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    116a <printCharArray+0x4a>
mov    -0xc(%rbp),%esi
lea    0xeab(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    113f <printCharArray+0x1f>
lea    0xe93(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    11b3 <printCharArray+0x93>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%esi
lea    0xe68(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    117f <printCharArray+0x5f>
lea    0xe4a(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<printCharArray>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
call   1040 <strlen@plt>
test   %eax,%eax
jle    119a <printCharArray+0x6a>
mov    %eax,%ebp
lea    0xeb4(%rip),%r15
xor    %ebx,%ebx
xchg   %ax,%ax
mov    %r15,%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%ebx
cmp    %ebx,%ebp
jne    1150 <printCharArray+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
test   %ebp,%ebp
jle    11a4 <printCharArray+0x74>
mov    %ebp,%ebp
lea    0xe8a(%rip),%r15
xor    %ebx,%ebx
nopl   0x0(%rax)
movsbl (%r14,%rbx,1),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%rbp
jne    1180 <printCharArray+0x50>
jmp    11a4 <printCharArray+0x74>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [4 x i8] c"%3d\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [4 x i8] c"%3c\00"
define void @printCharArray(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca i32
store i8* %0, i8** %2
%5 = load i8*, i8** %2
%6 = call i32 @strlen(i8* %5)
store i32 %6, i32* %4
store i32 0, i32* %3
br label %7
7: ; preds = %14, %1
%8 = load i32, i32* %3
%9 = load i32, i32* %4
%10 = icmp slt i32 %8, %9
br i1 %10, label %11, label %17
11: ; preds = %7
%12 = load i32, i32* %3
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %12)
br label %14
14: ; preds = %11
%15 = load i32, i32* %3
%16 = add nsw i32 %15, 1
store i32 %16, i32* %3
br label %7
17: ; preds = %7
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32 0, i32* %3
br label %19
19: ; preds = %31, %17
%20 = load i32, i32* %3
%21 = load i32, i32* %4
%22 = icmp slt i32 %20, %21
br i1 %22, label %23, label %34
23: ; preds = %19
%24 = load i8*, i8** %2
%25 = load i32, i32* %3
%26 = sext i32 %25 to i64
%27 = getelementptr inbounds i8, i8* %24, i64 %26
%28 = load i8, i8* %27
%29 = sext i8 %28 to i32
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %29)
br label %31
31: ; preds = %23
%32 = load i32, i32* %3
%33 = add nsw i32 %32, 1
store i32 %33, i32* %3
br label %19
34: ; preds = %19
%35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [4 x i8] c"%3d\00"
@.str.2 = [4 x i8] c"%3c\00"
define void @printCharArray(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 0
br i1 %3, label %6, label %4
4: ; preds = %1
%5 = tail call i32 @putchar(i32 10)
br label %23
6: ; preds = %1, %6
%7 = phi i32 [ %9, %6 ], [ 0, %1 ]
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = add nuw nsw i32 %7, 1
%10 = icmp eq i32 %9, %2
br i1 %10, label %11, label %6
11: ; preds = %6
%12 = tail call i32 @putchar(i32 10)
br i1 %3, label %13, label %23
13: ; preds = %11
%14 = zext i32 %2 to i64
br label %15
15: ; preds = %13, %15
%16 = phi i64 [ 0, %13 ], [ %21, %15 ]
%17 = getelementptr inbounds i8, i8* %0, i64 %16
%18 = load i8, i8* %17
%19 = sext i8 %18 to i32
%20 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %19)
%21 = add nuw nsw i64 %16, 1
%22 = icmp eq i64 %21, %14
br i1 %22, label %23, label %15
23: ; preds = %15, %4, %11
%24 = tail call i32 @putchar(i32 10)
ret void
}