#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;

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
void phex(uint8_t *str) {
  unsigned char i;
  for (i = 0; i < 16; ++i)
    printf("%.2x", str[i]);
  printf("\n");
}


x86 assembly (clang, -O0):
<phex>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movb   $0x0,-0x9(%rbp)
movzbl -0x9(%rbp),%eax
cmp    $0x10,%eax
jge    1153 <phex+0x43>
mov    -0x8(%rbp),%rax
movzbl -0x9(%rbp),%ecx
mov    (%rax,%rcx,4),%esi
lea    0xec1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x9(%rbp),%al
add    $0x1,%al
mov    %al,-0x9(%rbp)
jmp    1120 <phex+0x10>
lea    0xeab(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<phex>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%rbx
mov    (%rdi),%esi
lea    0xed0(%rip),%r14
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x4(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0xc(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x10(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x14(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x18(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x1c(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x20(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x24(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x28(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x2c(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x30(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x34(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x38(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x3c(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [5 x i8] c"%.2x\00"
@.str.1 = [2 x i8] c"\0A\00"
define void @phex(i32* %0) {
%2 = alloca i32*
%3 = alloca i8
store i32* %0, i32** %2
store i8 0, i8* %3
br label %4
4: ; preds = %15, %1
%5 = load i8, i8* %3
%6 = zext i8 %5 to i32
%7 = icmp slt i32 %6, 16
br i1 %7, label %8, label %18
8: ; preds = %4
%9 = load i32*, i32** %2
%10 = load i8, i8* %3
%11 = zext i8 %10 to i64
%12 = getelementptr inbounds i32, i32* %9, i64 %11
%13 = load i32, i32* %12
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %13)
br label %15
15: ; preds = %8
%16 = load i8, i8* %3
%17 = add i8 %16, 1
store i8 %17, i8* %3
br label %4
18: ; preds = %4
%19 = 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 = [5 x i8] c"%.2x\00"
define void @phex(i32* nocapture %0) {
%2 = load i32, i32* %0
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %2)
%4 = getelementptr inbounds i32, i32* %0, i64 1
%5 = load i32, i32* %4
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = getelementptr inbounds i32, i32* %0, i64 2
%8 = load i32, i32* %7
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %8)
%10 = getelementptr inbounds i32, i32* %0, i64 3
%11 = load i32, i32* %10
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = getelementptr inbounds i32, i32* %0, i64 4
%14 = load i32, i32* %13
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %14)
%16 = getelementptr inbounds i32, i32* %0, i64 5
%17 = load i32, i32* %16
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %17)
%19 = getelementptr inbounds i32, i32* %0, i64 6
%20 = load i32, i32* %19
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %20)
%22 = getelementptr inbounds i32, i32* %0, i64 7
%23 = load i32, i32* %22
%24 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %23)
%25 = getelementptr inbounds i32, i32* %0, i64 8
%26 = load i32, i32* %25
%27 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %26)
%28 = getelementptr inbounds i32, i32* %0, i64 9
%29 = load i32, i32* %28
%30 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %29)
%31 = getelementptr inbounds i32, i32* %0, i64 10
%32 = load i32, i32* %31
%33 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %32)
%34 = getelementptr inbounds i32, i32* %0, i64 11
%35 = load i32, i32* %34
%36 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %35)
%37 = getelementptr inbounds i32, i32* %0, i64 12
%38 = load i32, i32* %37
%39 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %38)
%40 = getelementptr inbounds i32, i32* %0, i64 13
%41 = load i32, i32* %40
%42 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %41)
%43 = getelementptr inbounds i32, i32* %0, i64 14
%44 = load i32, i32* %43
%45 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %44)
%46 = getelementptr inbounds i32, i32* %0, i64 15
%47 = load i32, i32* %46
%48 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %47)
%49 = tail call i32 @putchar(i32 10)
ret void
}