re PR tree-optimization/70985 (ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed)

2016-05-09  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/70985
	* match.pd (BIT_FIELD_REF -> (type)): Disable on GIMPLE when
	op0 isn't a gimple register.

	* gcc.dg/torture/pr70985.c: New testcase.

From-SVN: r236032

gcc/ChangeLog

+2016-05-09  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/70985
+	* match.pd (BIT_FIELD_REF -> (type)): Disable on GIMPLE when
+	op0 isn't a gimple register.
+
 2016-05-09  Prachi Godbole  <prachi.godbole@imgtec.com>
 
 	* config/mips/i6400.md (i6400_fpu_intadd, i6400_fpu_logic)

gcc/match.pd

@@ -3244,6 +3244,8 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
      (view_convert (imagpart @0)))))
   (if (INTEGRAL_TYPE_P (TREE_TYPE (@0))
        && INTEGRAL_TYPE_P (type)
+       /* On GIMPLE this should only apply to register arguments.  */
+       && (! GIMPLE || is_gimple_reg (@0))
        /* A bit-field-ref that referenced the full argument can be stripped.  */
        && ((compare_tree_int (@1, TYPE_PRECISION (TREE_TYPE (@0))) == 0
 	    && integer_zerop (@2))

gcc/testsuite/ChangeLog

+2016-05-09  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/70985
+	* gcc.dg/torture/pr70985.c: New testcase.
+
 2016-05-09  Bin Cheng  <bin.cheng@arm.com>
 
 	* gcc.dg/tree-ssa/ifc-9.c: New test.

gcc/testsuite/gcc.dg/torture/pr70985.c

+/* { dg-do compile } */
+/* { dg-require-effective-target int32plus } */
+
+struct
+{
+  int f0:24;
+} a, c, d;
+
+int b;
+
+int
+fn1 ()
+{
+  return 0;
+}
+
+void
+fn2 ()
+{
+  int e;
+  if (b) 
+    for (; e;)
+      {
+	d = c;
+	if (fn1 (b))
+	  b = a.f0;
+      }
+}