#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 /*<<< orphan*/ __m128i;

/* Variables and functions */
int /*<<< orphan*/ _mm_sub_epi8(int /*<<< orphan*/ const,
                                int /*<<< orphan*/ const);
void encode(__m128i *c, const __m128i *a, const __m128i *b, size_t uBlockLen) {
  size_t u;
  for (u = 0; u < uBlockLen; ++u) {
    c[u] = _mm_sub_epi8(a[u], b[u]);
  }
}


x86 assembly (clang, -O0):
<encode>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    %rcx,-0x20(%rbp)
movq   $0x0,-0x28(%rbp)
mov    -0x28(%rbp),%rax
cmp    -0x20(%rbp),%rax
jae    1177 <encode+0x67>
mov    -0x10(%rbp),%rax
mov    -0x28(%rbp),%rcx
mov    (%rax,%rcx,4),%edi
mov    -0x18(%rbp),%rax
mov    -0x28(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
call   1030 <_mm_sub_epi8@plt>
mov    %eax,%edx
mov    -0x8(%rbp),%rax
mov    -0x28(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
mov    -0x28(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x28(%rbp)
jmp    1130 <encode+0x20>
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<encode>:
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
test   %rcx,%rcx
je     114b <encode+0x3b>
mov    %rcx,%r12
mov    %rdx,%r14
mov    %rsi,%r15
mov    %rdi,%r13
xor    %ebx,%ebx
nopl   0x0(%rax)
mov    (%r15,%rbx,4),%edi
mov    (%r14,%rbx,4),%esi
call   1030 <_mm_sub_epi8@plt>
mov    %eax,0x0(%r13,%rbx,4)
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1130 <encode+0x20>
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define void @encode(i32* %0, i32* %1, i32* %2, i64 %3) {
%5 = alloca i32*
%6 = alloca i32*
%7 = alloca i32*
%8 = alloca i64
%9 = alloca i64
store i32* %0, i32** %5
store i32* %1, i32** %6
store i32* %2, i32** %7
store i64 %3, i64* %8
store i64 0, i64* %9
br label %10
10: ; preds = %27, %4
%11 = load i64, i64* %9
%12 = load i64, i64* %8
%13 = icmp ult i64 %11, %12
br i1 %13, label %14, label %30
14: ; preds = %10
%15 = load i32*, i32** %6
%16 = load i64, i64* %9
%17 = getelementptr inbounds i32, i32* %15, i64 %16
%18 = load i32, i32* %17
%19 = load i32*, i32** %7
%20 = load i64, i64* %9
%21 = getelementptr inbounds i32, i32* %19, i64 %20
%22 = load i32, i32* %21
%23 = call i32 @_mm_sub_epi8(i32 %18, i32 %22)
%24 = load i32*, i32** %5
%25 = load i64, i64* %9
%26 = getelementptr inbounds i32, i32* %24, i64 %25
store i32 %23, i32* %26
br label %27
27: ; preds = %14
%28 = load i64, i64* %9
%29 = add i64 %28, 1
store i64 %29, i64* %9
br label %10
30: ; preds = %10
ret void
}

LLVM IR (-O2):
define void @encode(i32* nocapture writeonly %0, i32* nocapture %1, i32* nocapture %2, i64 %3) {
%5 = icmp eq i64 %3, 0
br i1 %5, label %16, label %6
6: ; preds = %4, %6
%7 = phi i64 [ %14, %6 ], [ 0, %4 ]
%8 = getelementptr inbounds i32, i32* %1, i64 %7
%9 = load i32, i32* %8
%10 = getelementptr inbounds i32, i32* %2, i64 %7
%11 = load i32, i32* %10
%12 = tail call i32 @_mm_sub_epi8(i32 %9, i32 %11)
%13 = getelementptr inbounds i32, i32* %0, i64 %7
store i32 %12, i32* %13
%14 = add nuw i64 %7, 1
%15 = icmp eq i64 %14, %3
br i1 %15, label %16, label %6
16: ; preds = %6, %4
ret void
}