1 files changed, 61 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0379-PR-tree-optimization-49093.patch b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0379-PR-tree-optimization-49093.patch
new file mode 100644
index 0000000000..d4dbe83486
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.6.0/gcc-4_6-branch-backports/0379-PR-tree-optimization-49093.patch
@@ -0,0 +1,61 @@
+From 3fb16a9ff349672beb2818d1139bb689ee424da4 Mon Sep 17 00:00:00 2001
+From: irar <irar@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Thu, 2 Jun 2011 07:02:57 +0000
+Subject: [PATCH]         PR tree-optimization/49093
+         * tree-vect-data-refs.c (vect_analyze_data_refs): Fail for
+         volatile data references.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@174559 138bc75d-0d04-0410-961f-82ee72b054a4
+
+index 5ae1848..20fdeec 100644
+new file mode 100644
+index 0000000..b8bded6
+--- /dev/null
++++ b/gcc/testsuite/gcc.dg/vect/pr49093.c
+@@ -0,0 +1,22 @@
++/* { dg-do compile } */
++/* { dg-options "-O1 -ftree-vectorize -fdump-tree-vect-details -fno-tree-fre" } */
++
++volatile unsigned char g_324[4] = {0, 1, 0, 1};
++void foo (int);
++int x, y;
++void func_81(void)
++{
++    int l_466, l_439[7] = {0}, g_97;
++lbl_473:
++    if (x) {
++        for (g_97 = 0; (g_97 < 4); ++g_97) {
++            if (y)
++              goto lbl_473;
++            g_324[g_97];
++            l_466 = l_439[g_97];
++        }
++        foo(l_466);
++    }
++}
++
++/* { dg-final { cleanup-tree-dump "vect" } } */
+diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
+index a1437b5..db5098c 100644
+--- a/gcc/tree-vect-data-refs.c
++++ b/gcc/tree-vect-data-refs.c
+@@ -2577,6 +2577,16 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
+             return false;
+         }
+ 
++      if (TREE_THIS_VOLATILE (DR_REF (dr)))
++        {
++          if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
++            {
++              fprintf (vect_dump, "not vectorized: volatile type ");
++              print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
++            }
++          return false;
++        }
++
+       base = unshare_expr (DR_BASE_ADDRESS (dr));
+       offset = unshare_expr (DR_OFFSET (dr));
+       init = unshare_expr (DR_INIT (dr));
+-- 
+1.7.0.4
+