From: Richard Henderson <rth@redhat.com>
Date: Sun, 27 Nov 2011 00:01:04 +0000 (-0800)
Subject: omp-low: Assume anything aligned to BIGGEST_ALIGNMENT is aligned.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fec2ef4b687d67253426e011975c3defa7e52f29;p=gcc.git

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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7b81a0e1d9e..5d304c89026 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+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.
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index a4bfb8413fe..4e1c2badae3 100644
--- 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