From: Richard Henderson <rth@redhat.com>
Date: Mon, 5 Mar 2012 19:52:08 +0000 (-0800)
Subject: re PR tree-optimization/52242 (libgomp.c/atomic-2.c failure on s390x)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4999c62c838dde11b309da746a563b684fe325ea;p=gcc.git

re PR tree-optimization/52242 (libgomp.c/atomic-2.c failure on s390x)

PR tree-opt/52242
	Revert: 2011-11-26  Richard Henderson  <rth@redhat.com>
	* omp-low.c (expand_omp_atomic): Assume anything aligned to
	BIGGEST_ALIGNMENT is aligned.

From-SVN: r184955
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c9fa1521ef3..936a07ec5a2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2012-03-05  Richard Henderson  <rth@redhat.com>
+
+	PR tree-opt/52242
+	Revert: 2011-11-26  Richard Henderson  <rth@redhat.com>
+	* omp-low.c (expand_omp_atomic): Assume anything aligned to
+	BIGGEST_ALIGNMENT is aligned.
+
 2012-03-05  Richard Henderson  <rth@redhat.com>
 
 	* config/sh/sh.h (TARGET_ATOMIC_TEST_AND_SET_TRUEVAL): Move...
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index db715947df0..82ca4fd69cd 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -5504,9 +5504,7 @@ expand_omp_atomic (struct omp_region *region)
       unsigned int align = TYPE_ALIGN_UNIT (type);
 
       /* __sync builtins require strict data alignment.  */
-      /* ??? Assume BIGGEST_ALIGNMENT *is* aligned.  */
-      if (exact_log2 (align) >= index
-	  || align * BITS_PER_UNIT >= BIGGEST_ALIGNMENT)
+      if (exact_log2 (align) >= index)
 	{
 	  /* Atomic load.  */
 	  if (loaded_val == stored_val