#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 smooth_lib_present_buf(char *buf, int len) {
  int i;
  for (i = 0; i < len; ++i) {
    printf("%02x%s", buf[i], i % 20 == 19 ? "\n" : " ");
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<smooth_lib_present_buf>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    117c <smooth_lib_present_buf+0x6c>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
movsbl (%rax,%rcx,1),%esi
mov    -0x10(%rbp),%eax
mov    $0x14,%ecx
cltd
idiv   %ecx
mov    %edx,%ecx
lea    0xeb7(%rip),%rdx
lea    0xeae(%rip),%rax
cmp    $0x13,%ecx
cmove  %rax,%rdx
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1126 <smooth_lib_present_buf+0x16>
lea    0xe84(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<smooth_lib_present_buf>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
jle    118c <smooth_lib_present_buf+0x6c>
mov    %rdi,%r15
mov    %esi,%ebx
mov    $0xcccccccd,%r12d
lea    0xec6(%rip),%r13
lea    0xeb8(%rip),%r14
xor    %ebp,%ebp
jmp    1168 <smooth_lib_present_buf+0x48>
nopl   0x0(%rax)
movsbl (%r15,%rbp,1),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbp
cmp    %rbp,%rbx
je     118c <smooth_lib_present_buf+0x6c>
mov    %ebp,%eax
imul   %r12,%rax
shr    $0x24,%rax
lea    (%rax,%rax,4),%eax
lea    0x13(,%rax,4),%eax
mov    %r13,%rdx
cmp    %ebp,%eax
je     1150 <smooth_lib_present_buf+0x30>
lea    0xe7f(%rip),%rdx
jmp    1150 <smooth_lib_present_buf+0x30>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [7 x i8] c"%02x%s\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [2 x i8] c" \00"
define void @smooth_lib_present_buf(i8* %0, i32 %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i32
store i8* %0, i8** %3
store i32 %1, i32* %4
store i32 0, i32* %5
br label %6
6: ; preds = %23, %2
%7 = load i32, i32* %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %7, %8
br i1 %9, label %10, label %26
10: ; preds = %6
%11 = load i8*, i8** %3
%12 = load i32, i32* %5
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds i8, i8* %11, i64 %13
%15 = load i8, i8* %14
%16 = sext i8 %15 to i32
%17 = load i32, i32* %5
%18 = srem i32 %17, 20
%19 = icmp eq i32 %18, 19
%20 = zext i1 %19 to i64
%21 = select i1 %19, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0)
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %16, i8* %21)
br label %23
23: ; preds = %10
%24 = load i32, i32* %5
%25 = add nsw i32 %24, 1
store i32 %25, i32* %5
br label %6
26: ; preds = %6
%27 = 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 = [7 x i8] c"%02x%s\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [2 x i8] c" \00"
define void @smooth_lib_present_buf(i8* nocapture %0, i32 %1) {
%3 = icmp sgt i32 %1, 0
br i1 %3, label %4, label %18
4: ; preds = %2
%5 = zext i32 %1 to i64
br label %6
6: ; preds = %4, %6
%7 = phi i64 [ 0, %4 ], [ %16, %6 ]
%8 = getelementptr inbounds i8, i8* %0, i64 %7
%9 = load i8, i8* %8
%10 = sext i8 %9 to i32
%11 = trunc i64 %7 to i32
%12 = urem i32 %11, 20
%13 = icmp eq i32 %12, 19
%14 = select i1 %13, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %10, i8* %14)
%16 = add nuw nsw i64 %7, 1
%17 = icmp eq i64 %16, %5
br i1 %17, label %18, label %6
18: ; preds = %6, %2
%19 = tail call i32 @putchar(i32 10)
ret void
}