* tree-vect-analyze.c (vect_object_analysis): Analyze initial

        condition of access function instead of base.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@96092 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d525af9..192220b 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-03-08  Ira Rosen  <irar@il.ibm.com>
+
+       PR tree-optimization/20122
+       * tree-vect-analyze.c (vect_object_analysis): Analyze initial
+       condition of access function instead of base.
+
 2005-03-07  Jeff Law  <law@redhat.com>
            Steven Bosscher  <stevenb@suse.de>
 

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8073879..5ad5eed 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2005-03-08  Ira Rosen  <irar@il.ibm.com>
+
+       * gcc.dg/vect/pr20122.c: New test.
+
 2005-03-07  Jeff Law  <law@redhat.com>
 
        * gcc.dg/tree-ssa/20030821-1.c: Verify that the computed goto

diff --git a/gcc/testsuite/gcc.dg/vect/pr20122.c b/gcc/testsuite/gcc.dg/vect/pr20122.c
new file mode 100644 (file)
index 0000000..ff6ec75
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr20122.c
@@ -0,0 +1,38 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+typedef short ashort __attribute__ ((__aligned__(16)));
+ashort Kernshort[24];
+static void VecBug(ashort Kernel[8][24]) __attribute__((noinline));
+static void VecBug(ashort Kernel[8][24]);
+
+/* Doesn't occur of only inner-loop. */
+static void VecBug(ashort Kernel[8][24])
+{
+  int k,i;
+    for (k = 0; k<8; k++)
+        for (i = 0; i<24; i++)
+            Kernshort[i] = Kernel[k][i];
+}
+
+int main (int argc, char **argv)
+{
+    check_vect ();
+
+    ashort Kernel[8][24];
+    int k,i;
+
+    for (k = 0; k<8; k++)
+        for (i = 0; i<24; i++)
+            Kernel[k][i] = 0;
+
+    VecBug(Kernel);
+
+    return 0;
+}
+
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" } } */
+

diff --git a/gcc/tree-vect-analyze.c b/gcc/tree-vect-analyze.c
index 4736f1b..3744504 100644 (file)
--- a/gcc/tree-vect-analyze.c
+++ b/gcc/tree-vect-analyze.c
@@ -1654,10 +1654,11 @@ vect_object_analysis (tree memref, tree stmt, bool is_read,
                fprintf (vect_dump, "not vectorized: ptr is loop invariant.");  
              return NULL_TREE;
            }
-         /* Since there exists DR for MEMREF, we are analyzing the base of
-            handled component, which not necessary has evolution in the 
+         /* Since there exists DR for MEMREF, we are analyzing the init of 
+            the access function, which not necessary has evolution in the 
             loop.  */
-         address_to_analyze = TREE_OPERAND (base, 0);
+         address_to_analyze = initial_condition_in_loop_num (access_fn,
+                                                              loop->num);
        }
       
       /* 3.3 set data-reference structure for MEMREF.  */