#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 */
typedef int uint8_t;
typedef scalar_t__ uint32_t;

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
void print_memory(uint8_t *start, uint32_t length) {
  if (NULL == start) {
    return;
  }
  printf("%p", start);
  for (uint32_t i = 0; i < length; i++) {
    printf(" %.2x", *(start + i));
  }
}


x86 assembly (clang, -O0):
<print_memory>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
xor    %eax,%eax
cmp    -0x8(%rbp),%rax
jne    1131 <print_memory+0x21>
jmp    1183 <print_memory+0x73>
mov    -0x8(%rbp),%rsi
lea    0xec4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movq   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%rax
cmp    -0x10(%rbp),%rax
jge    1183 <print_memory+0x73>
mov    -0x8(%rbp),%rax
mov    -0x18(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x18(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x18(%rbp)
jmp    114b <print_memory+0x3b>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_memory>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
test   %rdi,%rdi
je     1167 <print_memory+0x57>
mov    %rsi,%r14
mov    %rdi,%r12
lea    0xed6(%rip),%rdi
mov    %r12,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
test   %r14,%r14
jle    1167 <print_memory+0x57>
lea    0xec3(%rip),%r15
xor    %ebx,%ebx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    (%r12,%rbx,4),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r14
jne    1150 <print_memory+0x40>
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
@.str = [3 x i8] c"%p\00"
@.str.1 = [6 x i8] c" %.2x\00"
define void @print_memory(i32* %0, i64 %1) {
%3 = icmp eq i32* %0, null
br i1 %3, label %14, label %4
4: ; preds = %2
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %0)
%6 = icmp sgt i64 %1, 0
br i1 %6, label %7, label %14
7: ; preds = %4, %7
%8 = phi i64 [ %12, %7 ], [ 0, %4 ]
%9 = getelementptr inbounds i32, i32* %0, i64 %8
%10 = load i32, i32* %9
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %10)
%12 = add nuw nsw i64 %8, 1
%13 = icmp eq i64 %12, %1
br i1 %13, label %14, label %7
14: ; preds = %7, %4, %2
ret void
}