PR rtl-optimization/25432

	* reload1.c (eliminate_regs_in_insn): Update insn code on
	successfully re-recognizing modified insn.

	* gcc.c-torture/compile/20051216-1.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@108985 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 142 insertions, 10 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 161a1c777d6..0ee56c05528 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-12-23  Alan Modra  <amodra@bigpond.net.au>
+
+	PR rtl-optimization/25432
+	* reload1.c (eliminate_regs_in_insn): Update insn code on
+	successfully re-recognizing modified insn.
+
 2005-12-22  Richard Guenther  <rguenther@suse.de>
 
 	* tree.c (tree_fold_gcd): Use build_int_cst where appropriate.
diff --git a/gcc/reload1.c b/gcc/reload1.c
index 64946375154..01943f3a7a0 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -1831,8 +1831,6 @@ find_reload_regs (struct insn_chain *chain)
 	  && rld[r].regno == -1)
 	if (! find_reg (chain, i))
 	  {
- 	    if (dump_file)
- 	      fprintf (dump_file, "reload failure for reload %d\n", r);
 	    spill_failure (chain->insn, rld[r].class);
 	    failure = 1;
 	    return;
@@ -1901,12 +1899,6 @@ spill_failure (rtx insn, enum reg_class class)
     {
       error ("unable to find a register to spill in class %qs",
 	     reg_class_names[class]);
- 
-      if (dump_file)
- 	{
- 	  fprintf (dump_file, "\nReloads for insn # %d\n", INSN_UID (insn));
- 	  debug_reload_to_stream (dump_file);
- 	}
       fatal_insn ("this is the insn:", insn);
     }
 }
@@ -3241,8 +3233,8 @@ eliminate_regs_in_insn (rtx insn, int replace)
 	      || GET_CODE (SET_SRC (old_set)) == PLUS))
 	{
 	  int new_icode = recog (PATTERN (insn), insn, 0);
-	  if (new_icode < 0)
-	    INSN_CODE (insn) = icode;
+	  if (new_icode >= 0)
+	    INSN_CODE (insn) = new_icode;
 	}
     }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ce80c155761..23222eabd9e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2005-12-23  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/25432
+	* gcc.c-torture/compile/20051216-1.c: New test.
+
 	PR objc/25328
 	* objc/execute/pr25328.m: New test.
 
diff --git a/gcc/testsuite/gcc.c-torture/compile/20051216-1.c b/gcc/testsuite/gcc.c-torture/compile/20051216-1.c
new file mode 100644
index 00000000000..ed6ac723069
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/20051216-1.c
@@ -0,0 +1,131 @@
+/* PR rtl-optimization/25432 */
+
+void *malloc (__SIZE_TYPE__);
+void *realloc (void *, __SIZE_TYPE__);
+
+struct A { double x, y; };
+struct B { double x0, y0, x1, y1; };
+struct C { int n_points; int dir; struct B bbox; struct A *points; };
+struct D { int n_segs; struct C segs[1]; };
+
+void foo (int, int, int *, int, int *, struct A **, int *, int *,
+	  struct D *, int *, struct D **, int *, int **);
+int baz (struct A, struct A, struct A, struct A);
+
+static void
+bar (struct D *svp, int *n_points_max,
+     struct A p, int *seg_map, int *active_segs, int i)
+{
+  int asi, n_points;
+  struct C *seg;
+
+  asi = seg_map[active_segs[i]];
+  seg = &svp->segs[asi];
+  n_points = seg->n_points;
+  seg->points = ((struct A *)
+		realloc (seg->points, (n_points_max[asi] <<= 1) * sizeof (struct A)));
+  seg->points[n_points] = p;
+  seg->bbox.y1 = p.y;
+  seg->n_points++;
+}
+
+struct D *
+test (struct D *vp)
+{
+  int *active_segs, n_active_segs, *cursor, seg_idx;
+  double y, share_x;
+  int tmp1, tmp2, asi, i, j, *n_ips, *n_ips_max, n_segs_max;
+  struct A **ips, p_curs, *pts;
+  struct D *new_vp;
+  int *n_points_max, *seg_map, first_share;
+
+  n_segs_max = 16;
+  new_vp = (struct D *) malloc (sizeof (struct D) +
+				(n_segs_max - 1) * sizeof (struct C));
+  new_vp->n_segs = 0;
+
+  if (vp->n_segs == 0)
+    return new_vp;
+
+  active_segs = ((int *) malloc ((vp->n_segs) * sizeof (int)));
+  cursor = ((int *) malloc ((vp->n_segs) * sizeof (int)));
+
+  seg_map = ((int *) malloc ((vp->n_segs) * sizeof (int)));
+  n_ips = ((int *) malloc ((vp->n_segs) * sizeof (int)));
+  n_ips_max = ((int *) malloc ((vp->n_segs) * sizeof (int)));
+  ips = ((struct A * *) malloc ((vp->n_segs) * sizeof (struct A *)));
+
+  n_points_max = ((int *) malloc ((n_segs_max) * sizeof (int)));
+
+  n_active_segs = 0;
+  seg_idx = 0;
+  y = vp->segs[0].points[0].y;
+  while (seg_idx < vp->n_segs || n_active_segs > 0)
+    {
+      for (i = 0; i < n_active_segs; i++)
+	{
+	  asi = active_segs[i];
+	  if (vp->segs[asi].n_points - 1 == cursor[asi] &&
+	      vp->segs[asi].points[cursor[asi]].y == y)
+	    i--;
+	}
+
+      while (seg_idx < vp->n_segs && y == vp->segs[seg_idx].points[0].y)
+	{
+	  cursor[seg_idx] = 0;
+	  n_ips[seg_idx] = 1;
+	  n_ips_max[seg_idx] = 2;
+	  ips[seg_idx] =
+	    ((struct A *) malloc ((n_ips_max[seg_idx]) * sizeof (struct A)));
+	  ips[seg_idx][0] = vp->segs[seg_idx].points[0];
+	  pts = ((struct A *) malloc ((16) * sizeof (struct A)));
+	  pts[0] = vp->segs[seg_idx].points[0];
+	  tmp1 = seg_idx;
+	  for (j = i; j < n_active_segs; j++)
+	    {
+	      tmp2 = active_segs[j];
+	      active_segs[j] = tmp1;
+	      tmp1 = tmp2;
+	    }
+	  active_segs[n_active_segs] = tmp1;
+	  n_active_segs++;
+	  seg_idx++;
+	}
+      first_share = -1;
+      share_x = 0;
+
+      for (i = 0; i < n_active_segs; i++)
+	{
+	  asi = active_segs[i];
+	  p_curs = ips[asi][1];
+	  if (p_curs.y == y)
+	    {
+	      bar (new_vp, n_points_max,
+		   p_curs, seg_map, active_segs, i);
+
+	      n_ips[asi]--;
+	      for (j = 0; j < n_ips[asi]; j++)
+		ips[asi][j] = ips[asi][j + 1];
+
+	      if (first_share < 0 || p_curs.x != share_x)
+		{
+		  foo (first_share, i,
+		       active_segs, n_active_segs,
+		       cursor, ips, n_ips, n_ips_max, vp, seg_map,
+		       &new_vp, &n_segs_max, &n_points_max);
+		  first_share = i;
+		  share_x = p_curs.x;
+		}
+	    }
+	  else
+	    {
+	      foo (first_share, i,
+		   active_segs, n_active_segs,
+		   cursor, ips, n_ips, n_ips_max, vp, seg_map,
+		   &new_vp, &n_segs_max, &n_points_max);
+	      first_share = -1;
+	    }
+	}
+    }
+  return new_vp;
+}