Fix same_close_phi_node

2016-03-16  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/68809
	* graphite-scop-detection.c (same_close_phi_node): Test if result types
	are the same.

	* gcc.dg/graphite/pr68809-2.c: New test.
	* gcc.dg/graphite/pr68809.c: New test.

From-SVN: r234250

gcc/ChangeLog

@@ -1,3 +1,9 @@
+2016-03-16  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/68809
+	* graphite-scop-detection.c (same_close_phi_node): Test if result types
+	are the same.
+
 2016-03-16  Carlos O'Donell  <carlos@redhat.com>
 	    Sandra Loosemore  <sandra@codesourcery.com>
 

gcc/graphite-scop-detection.c

@@ -273,8 +273,10 @@ trivially_empty_bb_p (basic_block bb)
 static inline bool
 same_close_phi_node (gphi *p1, gphi *p2)
 {
-  return operand_equal_p (gimple_phi_arg_def (p1, 0),
+  return (types_compatible_p (TREE_TYPE (gimple_phi_result (p1)),
-			  gimple_phi_arg_def (p2, 0), 0);
+			      TREE_TYPE (gimple_phi_result (p2)))
+	  && operand_equal_p (gimple_phi_arg_def (p1, 0),
+			      gimple_phi_arg_def (p2, 0), 0));
 }
 
 static void make_close_phi_nodes_unique (basic_block bb);

gcc/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2016-03-16  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/68809
+	* gcc.dg/graphite/pr68809-2.c: New test.
+	* gcc.dg/graphite/pr68809.c: New test.
+
 2016-03-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/70147

gcc/testsuite/gcc.dg/graphite/pr68809-2.c

@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -floop-nest-optimize" } */
+
+int ae, vs, gf;
+char ue;
+
+void
+kc (char);
+
+void
+pm (void)
+{
+  unsigned int v9;
+  int td = (gf != 0);
+  while (vs)
+    {
+      kc (ue);
+      for (ae = 0; ae < 70; ++ae)
+	{
+	}
+      ae &= 4;
+      ae ^ td && ((ue = 0) != 0);
+      ++vs;
+    }
+  v9 = ue + 1;
+  ue - v9 && ((ue = 0) != 0);
+}

gcc/testsuite/gcc.dg/graphite/pr68809.c

@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -floop-nest-optimize" } */
+
+int ae, vs;
+char ue;
+
+void
+kc (char);
+
+void
+pm (void)
+{
+  unsigned int v9;
+  int gf = 0;
+  vs = 1;
+  while (vs)
+    {
+      gf -= ue;
+      kc (ue);
+      for (ae = 0; ae < 70; ++ae)
+	{
+	}
+      ae &= 4;
+      ae ^ (gf != 0) && ((ue = 0) != 0);
+    }
+  v9 = ue + 1;
+  ue - v9 && ((ue = 0) != 0);
+}