re PR rtl-optimization/80112 (ICE in doloop_condition_get at loop-doloop.c:158)

	PR rtl-optimization/80112
	* loop-doloop.c (doloop_condition_get): Don't check condition
	if cmp isn't SET with IF_THEN_ELSE src.

	* gcc.dg/pr80112.c: New test.

From-SVN: r246441

gcc/ChangeLog

+2017-03-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/80112
+	* loop-doloop.c (doloop_condition_get): Don't check condition
+	if cmp isn't SET with IF_THEN_ELSE src.
+
 2017-03-24  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	PR tree-optimization/80158

gcc/loop-doloop.c

@@ -153,10 +153,13 @@ doloop_condition_get (rtx_insn *doloop_pat)
 	}
       else
         inc = PATTERN (prev_insn);
-      /* We expect the condition to be of the form (reg != 0)  */
-      cond = XEXP (SET_SRC (cmp), 0);
-      if (GET_CODE (cond) != NE || XEXP (cond, 1) != const0_rtx)
-        return 0;
+      if (GET_CODE (cmp) == SET && GET_CODE (SET_SRC (cmp)) == IF_THEN_ELSE)
+	{
+	  /* We expect the condition to be of the form (reg != 0)  */
+	  cond = XEXP (SET_SRC (cmp), 0);
+	  if (GET_CODE (cond) != NE || XEXP (cond, 1) != const0_rtx)
+	    return 0;
+	}
     }
   else
     {

gcc/testsuite/ChangeLog

+2017-03-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/80112
+	* gcc.dg/pr80112.c: New test.
+
 2017-03-24  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* c-c++-common/Wimplicit-fallthrough-7.c: Adjust dg-warning

gcc/testsuite/gcc.dg/pr80112.c

+/* PR rtl-optimization/80112 */
+/* { dg-do compile } */
+/* { dg-options "-Os -fmodulo-sched" } */
+
+void **a;
+
+void
+foo (int c)
+{
+  void *d[] = {&&e, &&f};
+  a = d;
+  switch (c)
+    {
+    f:
+      c = 9;
+      /* FALLTHRU */
+    case 9:
+      goto *a++;
+    e:;
+    }
+}