From: Ira Rosen <irar@il.ibm.com>
Date: Tue, 30 Jun 2009 11:48:51 +0000 (+0000)
Subject: re PR tree-optimization/40542 (vectorizes access to volatile array)
X-Git-Tag: releases/gcc-4.3.4~99
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cdeb5669d39477133091857012c562951a24e24;p=thirdparty%2Fgcc.git

re PR tree-optimization/40542 (vectorizes access to volatile array)


	PR tree-optimization/40542
	* tree-vect-analyze.c (vect_determine_vectorization_factor): Don't
	vectorize volatile types.

From-SVN: r149091
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 63ca404ef9ce..4a2bdff05b03 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-06-30  Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/40542
+	* tree-vect-analyze.c (vect_determine_vectorization_factor): Don't 
+	vectorize volatile types.
+
 2009-06-29  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/40579
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d3ec47688058..b4326871563e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2009-06-30  Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/40542
+	* gcc.dg/vect/pr40542.c: New test.
+
 2009-06-29  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/40579
diff --git a/gcc/testsuite/gcc.dg/vect/pr40542.c b/gcc/testsuite/gcc.dg/vect/pr40542.c
new file mode 100644
index 000000000000..0a827724dc8f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr40542.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+
+void
+volarr_cpy(char *d, volatile char *s)
+{
+  int i;
+  
+  for (i = 0; i < 16; i++)
+    d[i] = s[i];
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail *-*-* } } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */
+
diff --git a/gcc/tree-vect-analyze.c b/gcc/tree-vect-analyze.c
index c7f6d05aa2a9..62371cc1b952 100644
--- a/gcc/tree-vect-analyze.c
+++ b/gcc/tree-vect-analyze.c
@@ -173,6 +173,15 @@ vect_determine_vectorization_factor (loop_vec_info loop_vinfo)
 	      print_generic_expr (vect_dump, stmt, TDF_SLIM);
 	    }
 
+          if (stmt_ann (stmt)->has_volatile_ops)
+            {
+              if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))
+                fprintf (vect_dump, "not vectorized: stmt has volatile"
+                                    " operands");
+
+              return false;
+            }
+
 	  gcc_assert (stmt_info);
 
 	  /* skip stmts which do not need to be vectorized.  */