re PR tree-optimization/32230 (Segfault in set_bb_for_stmt with -O -ftree-vectorize)

PR tree-optimization/32230
	PR tree-optimization/32477
	* tree-vect-analyze.c (vect_analyze_data_refs): Fail if base
	address is a constant.

From-SVN: r126196

gcc/ChangeLog

@@ -1,3 +1,10 @@
+2007-07-02  Ira Rosen  <irar@il.ibm.com>
+
+	PR tree-optimization/32230
+	PR tree-optimization/32477
+	* tree-vect-analyze.c (vect_analyze_data_refs): Fail if base 
+	address is a constant.
+
 2007-07-02  Richard Sandiford  <richard@codesourcery.com>
 
 	* config.gcc (mipsisa32-*-elf*, mipsisa32el-*-elf*)

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2007-07-02  Ira Rosen  <irar@il.ibm.com>
+ 
+	PR tree-optimization/32230
+	* gcc.dg/vect/pr32230.c: New test.
+
 2007-07-01  Christopher D. Rickett  <crickett@lanl.gov>
 
 	* bind_c_array_params.f03: New files for Fortran 2003 ISO C Binding.

gcc/testsuite/gcc.dg/vect/pr32230.c

@@ -0,0 +1,24 @@
+/* { dg-do compile } */
+
+typedef struct filter_buffer filter_buffer_t;
+struct filter_buffer
+{
+  char buf[1];
+};
+typedef struct sbuf_header sbuf_header_t;
+struct sbuf_header
+{
+  char buf[1];
+}
+const_f (filter_buffer_t *buf)
+{
+  float val;
+  int i;
+
+  for (i = 0; i < 10; i++)
+    ((float*) (&((sbuf_header_t *) ((buf) == (filter_buffer_t *)&(buf)->buf[0]))->buf[0]))[i] = val;
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */
+
+

gcc/tree-vect-analyze.c

@@ -2092,6 +2092,15 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo)
             }
           return false;
         }
+
+      if (TREE_CODE (DR_BASE_ADDRESS (dr)) == INTEGER_CST)
+        {
+          if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))
+            fprintf (vect_dump, "not vectorized: base addr of dr is a "
+                     "constant");
+          return false;
+        }
+
       if (!DR_SYMBOL_TAG (dr))
         {
           if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))