#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*/ memcpy(char *, char const *, size_t);
size_t strlen(char const *);
size_t strlcpy(char *dst, const char *src, size_t siz) {
  size_t len = strlen(src);
  if (siz != 0) {
    if (len >= siz) {
      memcpy(dst, src, siz - 1);
      dst[siz - 1] = '\0';
    } else
      memcpy(dst, src, len + 1);
  }
  return len;
}


x86 assembly (clang, -O0):
<strlcpy>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x18(%rbp)
je     119e <strlcpy+0x7e>
mov    -0x20(%rbp),%rax
cmp    -0x18(%rbp),%rax
jb     1184 <strlcpy+0x64>
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x18(%rbp),%rdx
sub    $0x1,%rdx
call   1040 <memcpy@plt>
mov    -0x8(%rbp),%rax
mov    -0x18(%rbp),%rcx
sub    $0x1,%rcx
movb   $0x0,(%rax,%rcx,1)
jmp    1199 <strlcpy+0x79>
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x20(%rbp),%rdx
add    $0x1,%rdx
call   1040 <memcpy@plt>
jmp    119e <strlcpy+0x7e>
mov    -0x20(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<strlcpy>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rdx,%rbx
mov    %rsi,%r15
mov    %rdi,%r14
mov    %rsi,%rdi
call   1030 <strlen@plt>
mov    %rax,%r12
test   %rbx,%rbx
je     116f <strlcpy+0x4f>
cmp    %rbx,%r12
jae    115a <strlcpy+0x3a>
mov    %r12,%rdx
add    $0x1,%rdx
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <memcpy@plt>
jmp    116f <strlcpy+0x4f>
lea    -0x1(%rbx),%rdx
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <memcpy@plt>
movb   $0x0,-0x1(%r14,%rbx,1)
mov    %r12,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i64 @strlcpy(i8* %0, i8* %1, i64 %2) {
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i64
%7 = alloca i64
store i8* %0, i8** %4
store i8* %1, i8** %5
store i64 %2, i64* %6
%8 = load i8*, i8** %5
%9 = call i64 @strlen(i8* %8)
store i64 %9, i64* %7
%10 = load i64, i64* %6
%11 = icmp ne i64 %10, 0
br i1 %11, label %12, label %33
12: ; preds = %3
%13 = load i64, i64* %7
%14 = load i64, i64* %6
%15 = icmp uge i64 %13, %14
br i1 %15, label %16, label %26
16: ; preds = %12
%17 = load i8*, i8** %4
%18 = load i8*, i8** %5
%19 = load i64, i64* %6
%20 = sub i64 %19, 1
%21 = call i32 @memcpy(i8* %17, i8* %18, i64 %20)
%22 = load i8*, i8** %4
%23 = load i64, i64* %6
%24 = sub i64 %23, 1
%25 = getelementptr inbounds i8, i8* %22, i64 %24
store i8 0, i8* %25
br label %32
26: ; preds = %12
%27 = load i8*, i8** %4
%28 = load i8*, i8** %5
%29 = load i64, i64* %7
%30 = add i64 %29, 1
%31 = call i32 @memcpy(i8* %27, i8* %28, i64 %30)
br label %32
32: ; preds = %26, %16
br label %33
33: ; preds = %32, %3
%34 = load i64, i64* %7
ret i64 %34
}

LLVM IR (-O2):
define i64 @strlcpy(i8* %0, i8* %1, i64 %2) {
%4 = tail call i64 @strlen(i8* dereferenceable(1) %1)
%5 = icmp eq i64 %2, 0
br i1 %5, label %15, label %6
6: ; preds = %3
%7 = icmp ult i64 %4, %2
br i1 %7, label %12, label %8
8: ; preds = %6
%9 = add i64 %2, -1
%10 = tail call i32 @memcpy(i8* %0, i8* %1, i64 %9)
%11 = getelementptr inbounds i8, i8* %0, i64 %9
store i8 0, i8* %11
br label %15
12: ; preds = %6
%13 = add nuw i64 %4, 1
%14 = tail call i32 @memcpy(i8* %0, i8* %1, i64 %13)
br label %15
15: ; preds = %8, %12, %3
ret i64 %4
}