tree-data-ref.c (dump_data_dependence_relation): Avoid data reference dumps if ddr...

2008-03-21  Martin Jambor  <mjambor@suse.cz>

	* tree-data-ref.c (dump_data_dependence_relation): Avoid data
	reference dumps if ddr is NULL or dependence is unknown.

From-SVN: r133419

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c316af3..2f4c076 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2008-03-21  Martin Jambor  <mjambor@suse.cz>
+
+       * tree-data-ref.c (dump_data_dependence_relation): Avoid data
+       reference dumps if ddr is NULL or dependence is unknown.
+
 2008-03-20  Kaz Kojima  <kkojima@gcc.gnu.org>
 
        * config/sh/linux-atomic.asm (ATOMIC_TEST_AND_SET): Take

diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c
index f8faed8..3a204d5 100644 (file)
--- a/gcc/tree-data-ref.c
+++ b/gcc/tree-data-ref.c
@@ -358,17 +358,20 @@ dump_data_dependence_relation (FILE *outf,
 {
   struct data_reference *dra, *drb;
 
-  dra = DDR_A (ddr);
-  drb = DDR_B (ddr);
   fprintf (outf, "(Data Dep: \n");
 
+  if (!ddr || DDR_ARE_DEPENDENT (ddr) == chrec_dont_know)
+    {
+      fprintf (outf, "    (don't know)\n)\n");
+      return;
+    }
+
+  dra = DDR_A (ddr);
+  drb = DDR_B (ddr);
   dump_data_reference (outf, dra);
   dump_data_reference (outf, drb);
 
-  if (DDR_ARE_DEPENDENT (ddr) == chrec_dont_know)
-    fprintf (outf, "    (don't know)\n");
-  
-  else if (DDR_ARE_DEPENDENT (ddr) == chrec_known)
+  if (DDR_ARE_DEPENDENT (ddr) == chrec_known)
     fprintf (outf, "    (no dependence)\n");
   
   else if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)