From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 30 May 2017 08:20:03 +0000 (+0200)
Subject: backport: re PR rtl-optimization/80112 (ICE in doloop_condition_get at loop-doloop... 
X-Git-Tag: releases/gcc-5.5.0~249
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df974487f892203325685b9e4d566f97db99a322;p=thirdparty%2Fgcc.git

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

	Backported from mainline
	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.

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

From-SVN: r248664
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5ec64f66e44d..106c41c05014 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2017-05-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	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.
+
 	2017-03-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/80129
diff --git a/gcc/loop-doloop.c b/gcc/loop-doloop.c
index 0b6447adedeb..221939a840ba 100644
--- a/gcc/loop-doloop.c
+++ b/gcc/loop-doloop.c
@@ -179,10 +179,13 @@ doloop_condition_get (rtx 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
     {
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d1080804767c..44a06cdd1f9b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2017-05-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2017-03-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/80112
+	* gcc.dg/pr80112.c: New test.
+
 	2017-03-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/80141
diff --git a/gcc/testsuite/gcc.dg/pr80112.c b/gcc/testsuite/gcc.dg/pr80112.c
new file mode 100644
index 000000000000..7c78aaedd981
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr80112.c
@@ -0,0 +1,21 @@
+/* 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:;
+    }
+}