#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 */
scalar_t__ malloc(int);
int /*<<< orphan*/ memcpy(char *, char const *, size_t);
char *hoedown_hash_strndup(const char *str, size_t n) {
  if (str) {
    char *s = (char *)malloc(sizeof(char) * (n + 1));
    if (s) {
      memcpy(s, str, n);
      s[n] = '\0';
    }
    return s;
  }
  return NULL;
}


x86 assembly (clang, -O0):
<hoedown_hash_strndup>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     1187 <hoedown_hash_strndup+0x67>
mov    -0x18(%rbp),%rax
add    $0x1,%rax
shl    $0x0,%rax
mov    %eax,%edi
call   1040 <malloc@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
je     117a <hoedown_hash_strndup+0x5a>
mov    -0x20(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x18(%rbp),%rdx
call   1030 <memcpy@plt>
mov    -0x20(%rbp),%rax
mov    -0x18(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x20(%rbp),%rax
mov    %rax,-0x8(%rbp)
jmp    118f <hoedown_hash_strndup+0x6f>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<hoedown_hash_strndup>:
push   %r15
push   %r14
push   %rbx
test   %rdi,%rdi
je     1155 <hoedown_hash_strndup+0x35>
mov    %rsi,%r14
mov    %rdi,%r15
lea    0x1(%rsi),%edi
call   1040 <malloc@plt>
mov    %rax,%rbx
test   %rax,%rax
je     1157 <hoedown_hash_strndup+0x37>
mov    %rbx,%rdi
mov    %r15,%rsi
mov    %r14,%rdx
call   1030 <memcpy@plt>
movb   $0x0,(%rbx,%r14,1)
jmp    1157 <hoedown_hash_strndup+0x37>
xor    %ebx,%ebx
mov    %rbx,%rax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i8* @hoedown_hash_strndup(i8* %0, i64 %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i64
%6 = alloca i8*
store i8* %0, i8** %4
store i64 %1, i64* %5
%7 = load i8*, i8** %4
%8 = icmp ne i8* %7, null
br i1 %8, label %9, label %28
9: ; preds = %2
%10 = load i64, i64* %5
%11 = add i64 %10, 1
%12 = mul i64 1, %11
%13 = trunc i64 %12 to i32
%14 = call i64 @malloc(i32 %13)
%15 = inttoptr i64 %14 to i8*
store i8* %15, i8** %6
%16 = load i8*, i8** %6
%17 = icmp ne i8* %16, null
br i1 %17, label %18, label %26
18: ; preds = %9
%19 = load i8*, i8** %6
%20 = load i8*, i8** %4
%21 = load i64, i64* %5
%22 = call i32 @memcpy(i8* %19, i8* %20, i64 %21)
%23 = load i8*, i8** %6
%24 = load i64, i64* %5
%25 = getelementptr inbounds i8, i8* %23, i64 %24
store i8 0, i8* %25
br label %26
26: ; preds = %18, %9
%27 = load i8*, i8** %6
store i8* %27, i8** %3
br label %29
28: ; preds = %2
store i8* null, i8** %3
br label %29
29: ; preds = %28, %26
%30 = load i8*, i8** %3
ret i8* %30
}

LLVM IR (-O2):
define i8* @hoedown_hash_strndup(i8* %0, i64 %1) {
%3 = icmp eq i8* %0, null
br i1 %3, label %13, label %4
4: ; preds = %2
%5 = trunc i64 %1 to i32
%6 = add i32 %5, 1
%7 = tail call i64 @malloc(i32 %6)
%8 = inttoptr i64 %7 to i8*
%9 = icmp eq i64 %7, 0
br i1 %9, label %13, label %10
10: ; preds = %4
%11 = tail call i32 @memcpy(i8* %8, i8* %0, i64 %1)
%12 = getelementptr inbounds i8, i8* %8, i64 %1
store i8 0, i8* %12
br label %13
13: ; preds = %2, %4, %10
%14 = phi i8* [ %8, %10 ], [ %8, %4 ], [ null, %2 ]
ret i8* %14
}