Patch to fix PR63285

[Vladimir Makarov]

The following patch fixes PR63285.  The details can be found on

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63285

The patch was bootstrapped and tested on x86/x86-64.

Committed as rev 215364.

2014-09-18  Vladimir Makarov  <vmaka...@redhat.com>

        PR debug/63285
        * haifa-sched.c (schedule_block): Advance cycle at the end of BB
        if advance != 0.

2014-09-18  Vladimir Makarov  <vmaka...@redhat.com>

        PR debug/63285
        * gcc.target/i386/pr63285.c: New test.


Index: haifa-sched.c
===================================================================
--- haifa-sched.c	(revision 215337)
+++ haifa-sched.c	(working copy)
@@ -6473,7 +6473,7 @@ schedule_block (basic_block *target_bb,
   if (ls.modulo_epilogue)
     success = true;
  end_schedule:
-  if (!ls.first_cycle_insn_p)
+  if (!ls.first_cycle_insn_p || advance)
     advance_one_cycle ();
   perform_replacements_new_cycle ();
   if (modulo_ii > 0)
Index: testsuite/gcc.target/i386/pr63285.c
===================================================================
--- testsuite/gcc.target/i386/pr63285.c	(revision 0)
+++ testsuite/gcc.target/i386/pr63285.c	(working copy)
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcompare-debug" } */
+
+struct S { int a; };
+struct T { int b, c; } a;
+long b;
+int c, d;
+void bar (int, int);
+void baz (void *, int);
+
+void
+foo (struct S *x, int y, int z, void *f, int *p, struct T *e)
+{
+  while (x)
+    {
+      baz (f, &d > p);
+      if (z & 1)
+        bar (f > (void *) &f, z);
+    }
+  if (c)
+    {
+      asm ("" : "+m" (a) : "i" (0));
+      y--;
+    }
+  if (e->b == e->c)
+    c = y;
+  y--;
+}