re PR middle-end/67821 (ICE in duplicate_ssa_name_range_info)

	PR tree-optimization/67821
	* tree-ssanames.c (duplicate_ssa_name_range_info): Remove an assert.

	* gcc.dg/torture/pr67821-2.c: New test.
	* gcc.dg/torture/pr67821.c: New test.

From-SVN: r228490

gcc/ChangeLog

+2015-10-05  Marek Polacek  <polacek@redhat.com>
+
+	PR tree-optimization/67821
+	* tree-ssanames.c (duplicate_ssa_name_range_info): Remove an assert.
+
 2015-10-05  Thomas Schwinge  <thomas@codesourcery.com>
 
 	PR other/65021

gcc/testsuite/ChangeLog

+2015-10-05  Marek Polacek  <polacek@redhat.com>
+
+	PR tree-optimization/67821
+	* gcc.dg/torture/pr67821-2.c: New test.
+	* gcc.dg/torture/pr67821.c: New test.
+
 2015-10-05  Kirill Yukhin  <kirill.yukhin@intel.com>
 
 	* gcc.target/i386/builtin_target.c: Add check for "skylake-avx512".

gcc/testsuite/gcc.dg/torture/pr67821-2.c

+/* { dg-do compile } */
+
+int a, b, c, d, e, g;
+short f;
+
+void
+fn1 ()
+{
+  int i;
+  f = a - b;
+  e = (c && (i = d = (unsigned) f - 1)) || i;
+  g = (unsigned) f - 1;
+  c && (d = 0);
+}

gcc/testsuite/gcc.dg/torture/pr67821.c

+/* { dg-do compile } */
+
+int isdigit (int);
+
+int
+foo (const char *s)
+{
+  int success = 1;
+  const char *p = s + 2;
+  if (!isdigit (*p))
+    success = 0;
+  while (isdigit (*p))
+    ++p;
+  return success;
+}

gcc/tree-ssanames.c

@@ -503,7 +503,6 @@ duplicate_ssa_name_range_info (tree name, enum value_range_type range_type,
 
   gcc_assert (!POINTER_TYPE_P (TREE_TYPE (name)));
   gcc_assert (!SSA_NAME_RANGE_INFO (name));
-  gcc_assert (!SSA_NAME_ANTI_RANGE_P (name));
 
   if (!range_info)
     return;