#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, ...);
void dumpBuff(unsigned char *buffer, int len) {
  for (int t = 0; t < len; t += 2) {
    printf("%02x %02x ", buffer[t], buffer[t + 1]);
  }
  printf("\nSize: %d\n", len);
}


x86 assembly (clang, -O0):
<dumpBuff>:
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    116b <dumpBuff+0x5b>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
movzbl (%rax,%rcx,1),%esi
mov    -0x8(%rbp),%rax
mov    -0x10(%rbp),%ecx
add    $0x1,%ecx
movslq %ecx,%rcx
movzbl (%rax,%rcx,1),%edx
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x2,%eax
mov    %eax,-0x10(%rbp)
jmp    1126 <dumpBuff+0x16>
mov    -0xc(%rbp),%esi
lea    0xe96(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<dumpBuff>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %esi,%r15d
test   %esi,%esi
jle    114c <dumpBuff+0x3c>
mov    %rdi,%rbx
lea    0xed8(%rip),%r14
xor    %ebp,%ebp
nopw   0x0(%rax,%rax,1)
movzbl (%rbx,%rbp,1),%esi
movzbl 0x1(%rbx,%rbp,1),%edx
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x2,%rbp
cmp    %r15d,%ebp
jl     1130 <dumpBuff+0x20>
lea    0xeb8(%rip),%rdi
mov    %r15d,%esi
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <printf@plt>

LLVM IR (-O0):
@.str = [11 x i8] c"%02x %02x \00"
@.str.1 = [11 x i8] c"\0ASize: %d\0A\00"
define void @dumpBuff(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 = %25, %2
%7 = load i32, i32* %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %7, %8
br i1 %9, label %10, label %28
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 = zext i8 %15 to i32
%17 = load i8*, i8** %3
%18 = load i32, i32* %5
%19 = add nsw i32 %18, 1
%20 = sext i32 %19 to i64
%21 = getelementptr inbounds i8, i8* %17, i64 %20
%22 = load i8, i8* %21
%23 = zext i8 %22 to i32
%24 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %16, i32 %23)
br label %25
25: ; preds = %10
%26 = load i32, i32* %5
%27 = add nsw i32 %26, 2
store i32 %27, i32* %5
br label %6
28: ; preds = %6
%29 = load i32, i32* %4
%30 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 %29)
ret void
}

LLVM IR (-O2):
@.str = [11 x i8] c"%02x %02x \00"
@.str.1 = [11 x i8] c"\0ASize: %d\0A\00"
define void @dumpBuff(i8* nocapture %0, i32 %1) {
%3 = icmp sgt i32 %1, 0
br i1 %3, label %6, label %4
4: ; preds = %6, %2
%5 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i32 %1)
ret void
6: ; preds = %2, %6
%7 = phi i64 [ %16, %6 ], [ 0, %2 ]
%8 = getelementptr inbounds i8, i8* %0, i64 %7
%9 = load i8, i8* %8
%10 = zext i8 %9 to i32
%11 = or i64 %7, 1
%12 = getelementptr inbounds i8, i8* %0, i64 %11
%13 = load i8, i8* %12
%14 = zext i8 %13 to i32
%15 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %10, i32 %14)
%16 = add nuw i64 %7, 2
%17 = trunc i64 %16 to i32
%18 = icmp slt i32 %17, %1
br i1 %18, label %6, label %4
}