[committed] libgomp: Don't define GOMP_HAVE_EFFICIENT_ALIGNED_ALLOC for _aligned_malloc [PR105745]

[Jakub Jelinek <jakub@redhat.com>]

since apparently _aligned_malloc requires freeing with _aligned_free and:
 /* Defined if gomp_aligned_alloc doesn't use fallback version
    and free can be used instead of gomp_aligned_free.  */
 #define GOMP_HAVE_EFFICIENT_ALIGNED_ALLOC 1
so the second condition isn't satisfied.  For uses inside of the OpenMP
allocators we can still use _aligned_malloc but we need to call _aligned_free
in gomp_aligned_free.

Bootstrapped/regtested on x86_64-linux and i686-linux (no way to test on
mingw), committed to trunk.

2022-05-28  Jakub Jelinek  <jakub@redhat.com>

	PR libgomp/105745
	* libgomp.h (GOMP_HAVE_EFFICIENT_ALIGNED_ALLOC): Don't define for
	defined(HAVE__ALIGNED_MALLOC) case.
	* alloc.c (gomp_aligned_alloc): Move defined(HAVE__ALIGNED_MALLOC)
	handling as last option before fallback instead of first.
	(gomp_aligned_free): For defined(HAVE__ALIGNED_MALLOC) call
	_aligned_free.

--- libgomp/libgomp.h.jj	2022-05-23 21:44:48.941848475 +0200
+++ libgomp/libgomp.h	2022-05-27 13:11:55.576057315 +0200
@@ -87,7 +87,6 @@ enum memmodel
 /* alloc.c */
 
 #if defined(HAVE_ALIGNED_ALLOC) \
-    || defined(HAVE__ALIGNED_MALLOC) \
     || defined(HAVE_POSIX_MEMALIGN) \
     || defined(HAVE_MEMALIGN)
 /* Defined if gomp_aligned_alloc doesn't use fallback version
--- libgomp/alloc.c.jj	2022-01-11 22:31:41.361758955 +0100
+++ libgomp/alloc.c	2022-05-27 13:15:32.151816509 +0200
@@ -65,9 +65,7 @@ gomp_aligned_alloc (size_t al, size_t si
   void *ret;
   if (al < sizeof (void *))
     al = sizeof (void *);
-#ifdef HAVE__ALIGNED_MALLOC
-  ret = _aligned_malloc (size, al);
-#elif defined(HAVE_MEMALIGN)
+#ifdef HAVE_MEMALIGN
   {
     extern void *memalign (size_t, size_t);
     ret = memalign (al, size);
@@ -83,6 +81,8 @@ gomp_aligned_alloc (size_t al, size_t si
     else
       ret = NULL;
   }
+#elif defined(HAVE__ALIGNED_MALLOC)
+  ret = _aligned_malloc (size, al);
 #else
   ret = NULL;
   if ((al & (al - 1)) == 0 && size)
@@ -106,6 +106,8 @@ gomp_aligned_free (void *ptr)
 {
 #ifdef GOMP_HAVE_EFFICIENT_ALIGNED_ALLOC
   free (ptr);
+#elif defined(HAVE__ALIGNED_MALLOC)
+  _aligned_free (ptr);
 #else
   if (ptr)
     free (((void **) ptr)[-1]);

	Jakub