* config/m32c/m32c.c (m32c_option_override): Always disable

[pf3gnuchains/gcc-fork.git] / gcc / sese.h

diff --git a/gcc/sese.h b/gcc/sese.h
index f10030c..61f3a17 100644 (file)
--- a/gcc/sese.h
+++ b/gcc/sese.h
@@ -94,10 +94,6 @@ bb_in_region (basic_block bb, basic_block entry, basic_block exit)
        predecessors of EXIT are dominated by ENTRY.  */
     FOR_EACH_EDGE (e, ei, exit->preds)
       dominated_by_p (CDI_DOMINATORS, e->src, entry);
-
-    /* Check that there are no edges going out of the region: the
-       entry is post-dominated by the exit.  FIXME: This cannot be
-       checked right now as the CDI_POST_DOMINATORS are needed.  */
   }
 #endif
 
@@ -310,9 +306,7 @@ recompute_all_dominators (void)
 {
   mark_irreducible_loops ();
   free_dominance_info (CDI_DOMINATORS);
-  free_dominance_info (CDI_POST_DOMINATORS);
   calculate_dominance_info (CDI_DOMINATORS);
-  calculate_dominance_info (CDI_POST_DOMINATORS);
 }
 
 typedef struct gimple_bb
@@ -392,9 +386,22 @@ nb_common_loops (sese region, gimple_bb_p gbb1, gimple_bb_p gbb2)
 static inline bool
 scev_analyzable_p (tree def, sese region)
 {
-  gimple stmt = SSA_NAME_DEF_STMT (def);
-  loop_p loop = loop_containing_stmt (stmt);
-  tree scev = scalar_evolution_in_region (region, loop, def);
+  loop_p loop;
+  tree scev;
+  tree type = TREE_TYPE (def);
+
+  /* When Graphite generates code for a scev, the code generator
+     expresses the scev in function of a single induction variable.
+     This is unsafe for floating point computations, as it may replace
+     a floating point sum reduction with a multiplication.  The
+     following test returns false for non integer types to avoid such
+     problems.  */
+  if (!INTEGRAL_TYPE_P (type)
+      && !POINTER_TYPE_P (type))
+    return false;
+
+  loop = loop_containing_stmt (SSA_NAME_DEF_STMT (def));
+  scev = scalar_evolution_in_region (region, loop, def);
 
   return !chrec_contains_undetermined (scev)
     && TREE_CODE (scev) != SSA_NAME