#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 *, ...);
void print_hex_words(unsigned int *buffer, int length, int columns) {
  int i;
  for (i = 0; i < length; i++) {
    if ((i % columns) == 0)
      printf("\n");
    printf("%08x ", buffer[i]);
  }
  printf("\n\n");
}


x86 assembly (clang, -O0):
<print_hex_words>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %edx,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    117a <print_hex_words+0x6a>
mov    -0x14(%rbp),%eax
cltd
idivl  -0x10(%rbp)
cmp    $0x0,%edx
jne    1153 <print_hex_words+0x43>
lea    0xebb(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe9b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1129 <print_hex_words+0x19>
lea    0xe85(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_hex_words>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
test   %esi,%esi
jle    117d <print_hex_words+0x4d>
mov    %edx,%r15d
mov    %rdi,%r12
mov    %esi,%ebx
lea    0xeb5(%rip),%r14
xor    %ebp,%ebp
jmp    1167 <print_hex_words+0x37>
nop
mov    (%r12,%rbp,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%rbp
cmp    %rbp,%rbx
je     117d <print_hex_words+0x4d>
mov    %ebp,%eax
cltd
idiv   %r15d
test   %edx,%edx
jne    1150 <print_hex_words+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
jmp    1150 <print_hex_words+0x20>
lea    0xe82(%rip),%rdi
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
jmp    1040 <puts@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"\0A\00"
@.str.1 = [6 x i8] c"%08x \00"
@.str.2 = [3 x i8] c"\0A\0A\00"
define void @print_hex_words(i32* %0, i32 %1, i32 %2) {
%4 = alloca i32*
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
store i32* %0, i32** %4
store i32 %1, i32* %5
store i32 %2, i32* %6
store i32 0, i32* %7
br label %8
8: ; preds = %26, %3
%9 = load i32, i32* %7
%10 = load i32, i32* %5
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %29
12: ; preds = %8
%13 = load i32, i32* %7
%14 = load i32, i32* %6
%15 = srem i32 %13, %14
%16 = icmp eq i32 %15, 0
br i1 %16, label %17, label %19
17: ; preds = %12
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
br label %19
19: ; preds = %17, %12
%20 = load i32*, i32** %4
%21 = load i32, i32* %7
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds i32, i32* %20, i64 %22
%24 = load i32, i32* %23
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %24)
br label %26
26: ; preds = %19
%27 = load i32, i32* %7
%28 = add nsw i32 %27, 1
store i32 %28, i32* %7
br label %8
29: ; preds = %8
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str.1 = [6 x i8] c"%08x \00"
@str = [2 x i8] c"\0A\00"
define void @print_hex_words(i32* nocapture %0, i32 %1, i32 %2) {
%4 = icmp sgt i32 %1, 0
br i1 %4, label %5, label %20
5: ; preds = %3
%6 = zext i32 %1 to i64
br label %7
7: ; preds = %5, %14
%8 = phi i64 [ 0, %5 ], [ %18, %14 ]
%9 = trunc i64 %8 to i32
%10 = srem i32 %9, %2
%11 = icmp eq i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %7
%13 = tail call i32 @putchar(i32 10)
br label %14
14: ; preds = %12, %7
%15 = getelementptr inbounds i32, i32* %0, i64 %8
%16 = load i32, i32* %15
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %16)
%18 = add nuw nsw i64 %8, 1
%19 = icmp eq i64 %18, %6
br i1 %19, label %20, label %7
20: ; preds = %14, %3
%21 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @str, i64 0, i64 0))
ret void
}