omp-low: Assume anything aligned to BIGGEST_ALIGNMENT is aligned.

* omp-low.c (expand_omp_atomic): Assume anything aligned to BIGGEST_ALIGNMENT is aligned. From-SVN: r181748

omp-low: Assume anything aligned to BIGGEST_ALIGNMENT is aligned.
* omp-low.c (expand_omp_atomic): Assume anything aligned to BIGGEST_ALIGNMENT is aligned. From-SVN: r181748
fec2ef4b · Richard Henderson · Richard Henderson · 7b45b59b · fec2ef4b · fec2ef4b
Commit fec2ef4b authored Nov 26, 2011 by Richard Henderson Committed by Richard Henderson Nov 26, 2011
Hide whitespace changes
Inline Side-by-side

Showing with 8 additions and 1 deletions

gcc/ChangeLog
+5 -0

gcc/omp-low.c
+3 -1

No files found.
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
 2011-11-26  Richard Henderson  <rth@redhat.com>

+	* omp-low.c (expand_omp_atomic): Assume anything aligned to
+	BIGGEST_ALIGNMENT is aligned.
+
+2011-11-26  Richard Henderson  <rth@redhat.com>
+
 	* config/m68k/m68k.md (UNSPECV_CAS_1, UNSPECV_CAS_2): New.
 	(UNSPECV_TAS_1, UNSPECV_TAS_2): New.
 	(I): New mode iterator.
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -5501,7 +5501,9 @@ expand_omp_atomic (struct omp_region *region)
      unsigned int align = TYPE_ALIGN_UNIT (type);

      /* __sync builtins require strict data alignment.  */
-      if (exact_log2 (align) >= index)
+      /* ??? Assume BIGGEST_ALIGNMENT *is* aligned.  */
+      if (exact_log2 (align) >= index
+	  || align * BITS_PER_UNIT >= BIGGEST_ALIGNMENT)
 	{
 	  /* Atomic load.  */
 	  if (loaded_val == stored_val