[llvm] [Support] Give llvm_strlcpy restrict semantics (PR #78168)

[via llvm-commits]

https://github.com/AtariDreams created https://github.com/llvm/llvm-project/pull/78168

strlcpy has restrict semantics, so llvm_strlcpy should have them too.

Source: https://man.freebsd.org/cgi/man.cgi?strlcpy

>From 1cbc56a63c97f6ab65b4ba81d4fed3c34e9ec0be Mon Sep 17 00:00:00 2001
From: Rose <83477269+AtariDreams at users.noreply.github.com>
Date: Mon, 15 Jan 2024 10:28:43 -0500
Subject: [PATCH] [Support] Give llvm_strlcpy restrict semantics

strlcpy has restrict semantics, so llvm_strlcpy should have them too.

Source: https://man.freebsd.org/cgi/man.cgi?strlcpy
---
 llvm/lib/Support/regex_impl.h | 2 +-
 llvm/lib/Support/regstrlcpy.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Support/regex_impl.h b/llvm/lib/Support/regex_impl.h
index 8f0c532205edc3..6b780da10e35fe 100644
--- a/llvm/lib/Support/regex_impl.h
+++ b/llvm/lib/Support/regex_impl.h
@@ -99,7 +99,7 @@ size_t	llvm_regerror(int, const llvm_regex_t *, char *, size_t);
 int	llvm_regexec(const llvm_regex_t *, const char *, size_t,
                      llvm_regmatch_t [], int);
 void	llvm_regfree(llvm_regex_t *);
-size_t  llvm_strlcpy(char *dst, const char *src, size_t siz);
+size_t  llvm_strlcpy(char *__restrict dst, const char * __restrict src, size_t siz);
 
 #ifdef __cplusplus
 }
diff --git a/llvm/lib/Support/regstrlcpy.c b/llvm/lib/Support/regstrlcpy.c
index 8b68afdf75f16a..1e55c4f36af7b9 100644
--- a/llvm/lib/Support/regstrlcpy.c
+++ b/llvm/lib/Support/regstrlcpy.c
@@ -26,7 +26,7 @@
  * Returns strlen(src); if retval >= siz, truncation occurred.
  */
 size_t
-llvm_strlcpy(char *dst, const char *src, size_t siz)
+llvm_strlcpy(char *__restrict dst, const char *__restrict src, size_t siz)
 {
 	char *d = dst;
 	const char *s = src;