#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*/ assert(int);
int /*<<< orphan*/ memcpy(void *, unsigned char *, int);
int cbuf_get_mem(void *dstbuf, unsigned char **psrcbuf, int len) {
  assert(dstbuf != NULL);
  assert(psrcbuf != NULL);
  assert(*psrcbuf != NULL);
  assert(len > 0);
  memcpy(dstbuf, *psrcbuf, len);
  *psrcbuf += len;
  return (len);
}


x86 assembly (clang, -O0):
<cbuf_get_mem>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %edx,-0x14(%rbp)
cmpq   $0x0,-0x8(%rbp)
setne  %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
cmpq   $0x0,-0x10(%rbp)
setne  %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
mov    -0x10(%rbp),%rax
cmpq   $0x0,(%rax)
setne  %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
cmpl   $0x0,-0x14(%rbp)
setg   %al
and    $0x1,%al
movzbl %al,%edi
call   1030 <assert@plt>
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
mov    -0x14(%rbp),%edx
call   1040 <memcpy@plt>
mov    -0x14(%rbp),%edx
mov    -0x10(%rbp),%rax
mov    (%rax),%rcx
movslq %edx,%rdx
add    %rdx,%rcx
mov    %rcx,(%rax)
mov    -0x14(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<cbuf_get_mem>:
push   %rbp
push   %r14
push   %rbx
mov    %edx,%ebp
mov    %rsi,%rbx
mov    %rdi,%r14
xor    %edi,%edi
test   %r14,%r14
setne  %dil
call   1030 <assert@plt>
xor    %edi,%edi
test   %rbx,%rbx
setne  %dil
call   1030 <assert@plt>
xor    %edi,%edi
cmpq   $0x0,(%rbx)
setne  %dil
call   1030 <assert@plt>
xor    %edi,%edi
test   %ebp,%ebp
setg   %dil
call   1030 <assert@plt>
mov    (%rbx),%rsi
mov    %r14,%rdi
mov    %ebp,%edx
call   1040 <memcpy@plt>
movslq %ebp,%rax
add    %rax,(%rbx)
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define i32 @cbuf_get_mem(i8* %0, i8** %1, i32 %2) {
%4 = alloca i8*
%5 = alloca i8**
%6 = alloca i32
store i8* %0, i8** %4
store i8** %1, i8*** %5
store i32 %2, i32* %6
%7 = load i8*, i8** %4
%8 = icmp ne i8* %7, null
%9 = zext i1 %8 to i32
%10 = call i32 @assert(i32 %9)
%11 = load i8**, i8*** %5
%12 = icmp ne i8** %11, null
%13 = zext i1 %12 to i32
%14 = call i32 @assert(i32 %13)
%15 = load i8**, i8*** %5
%16 = load i8*, i8** %15
%17 = icmp ne i8* %16, null
%18 = zext i1 %17 to i32
%19 = call i32 @assert(i32 %18)
%20 = load i32, i32* %6
%21 = icmp sgt i32 %20, 0
%22 = zext i1 %21 to i32
%23 = call i32 @assert(i32 %22)
%24 = load i8*, i8** %4
%25 = load i8**, i8*** %5
%26 = load i8*, i8** %25
%27 = load i32, i32* %6
%28 = call i32 @memcpy(i8* %24, i8* %26, i32 %27)
%29 = load i32, i32* %6
%30 = load i8**, i8*** %5
%31 = load i8*, i8** %30
%32 = sext i32 %29 to i64
%33 = getelementptr inbounds i8, i8* %31, i64 %32
store i8* %33, i8** %30
%34 = load i32, i32* %6
ret i32 %34
}

LLVM IR (-O2):
define i32 @cbuf_get_mem(i8* %0, i8** %1, i32 returned %2) {
%4 = icmp ne i8* %0, null
%5 = zext i1 %4 to i32
%6 = tail call i32 @assert(i32 %5)
%7 = icmp ne i8** %1, null
%8 = zext i1 %7 to i32
%9 = tail call i32 @assert(i32 %8)
%10 = load i8*, i8** %1
%11 = icmp ne i8* %10, null
%12 = zext i1 %11 to i32
%13 = tail call i32 @assert(i32 %12)
%14 = icmp sgt i32 %2, 0
%15 = zext i1 %14 to i32
%16 = tail call i32 @assert(i32 %15)
%17 = load i8*, i8** %1
%18 = tail call i32 @memcpy(i8* %0, i8* %17, i32 %2)
%19 = load i8*, i8** %1
%20 = sext i32 %2 to i64
%21 = getelementptr inbounds i8, i8* %19, i64 %20
store i8* %21, i8** %1
ret i32 %2
}