From: Jan Hubicka <jh@suse.cz>
Date: Fri, 24 Nov 2023 16:59:44 +0000 (+0100)
Subject: Use memcpy instead of memmove in __relocate_a_1
X-Git-Tag: basepoints/gcc-15~4307
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c2dcfb6ba6e9a84a16e63ae73a822ae2a843170c;p=thirdparty%2Fgcc.git

Use memcpy instead of memmove in __relocate_a_1

__relocate_a_1 is used to copy data after vector reizing.  This can be done by memcpy
rather than memmove.

libstdc++-v3/ChangeLog:

	PR middle-end/109849
	* include/bits/stl_uninitialized.h (__relocate_a_1): Use memcpy instead
	of memmove.
---

diff --git a/libstdc++-v3/include/bits/stl_uninitialized.h b/libstdc++-v3/include/bits/stl_uninitialized.h
index 1282af3bc43f..a9b802774c66 100644
--- a/libstdc++-v3/include/bits/stl_uninitialized.h
+++ b/libstdc++-v3/include/bits/stl_uninitialized.h
@@ -1119,14 +1119,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 #ifdef __cpp_lib_is_constant_evaluated
 	  if (std::is_constant_evaluated())
 	    {
-	      // Can't use memmove. Wrap the pointer so that __relocate_a_1
+	      // Can't use memcpu. Wrap the pointer so that __relocate_a_1
 	      // resolves to the non-trivial overload above.
 	      __gnu_cxx::__normal_iterator<_Tp*, void> __out(__result);
 	      __out = std::__relocate_a_1(__first, __last, __out, __alloc);
 	      return __out.base();
 	    }
 #endif
-	  __builtin_memmove(__result, __first, __count * sizeof(_Tp));
+	  __builtin_memcpy(__result, __first, __count * sizeof(_Tp));
 	}
       return __result + __count;
     }