re PR middle-end/29584 (internal compiler error on optimization)

	PR middle-end/29584
	* tree-ssa-forwprop.c (simplify_switch_expr): Don't
	optimize if DEF doesn't have integral type.

	* gcc.dg/torture/pr29584.c: New test.

From-SVN: r118921

gcc/ChangeLog

+2006-11-17  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/29584
+	* tree-ssa-forwprop.c (simplify_switch_expr): Don't
+	optimize if DEF doesn't have integral type.
+
 2006-11-16  Mike Stump  <mrs@apple.com>
 
 	* config/darwin.h (LINK_COMMAND_SPEC): Don't do dwarf stuff on

gcc/testsuite/ChangeLog

+2006-11-17  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/29584
+	* gcc.dg/torture/pr29584.c: New test.
+
 2006-11-17  Joseph Myers  <joseph@codesourcery.com>
 
 	* gcc.dg/tree-ssa/stdarg-2.c, gcc.dg/tree-ssa/stdarg-4.c:

gcc/testsuite/gcc.dg/torture/pr29584.c

+/* PR middle-end/29584 */
+/* { dg-do compile } */
+
+extern void *foo1 (void);
+extern void foo2 (void);
+extern void foo3 (void *, void *);
+extern int foo4 (void);
+
+void
+bar (void)
+{
+  int i;
+  void *s;
+  for (i = 1; i < 4; i++)
+    {
+      if (foo4 ())
+	foo2 ();
+      switch (0x8000000UL + i * 0x400)
+	{
+	case 0x80000000UL ... 0x80000000UL + 0x3a000000UL - 1:
+	  s = 0;
+	  break;
+	default:
+	  s = foo1 ();
+	}
+      foo3 ((void *) (0x8000000UL + i * 0x400), s);
+    }
+}

gcc/tree-ssa-forwprop.c

@@ -934,7 +934,9 @@ simplify_switch_expr (tree stmt)
 
 	      need_precision = TYPE_PRECISION (ti);
 	      fail = false;
-	      if (TYPE_UNSIGNED (to) && !TYPE_UNSIGNED (ti))
+	      if (! INTEGRAL_TYPE_P (ti))
+		fail = true;
+	      else if (TYPE_UNSIGNED (to) && !TYPE_UNSIGNED (ti))
 		fail = true;
 	      else if (!TYPE_UNSIGNED (to) && TYPE_UNSIGNED (ti))
 		need_precision += 1;