+2007-11-01 Jakub Jelinek <jakub@redhat.com>
+
+ PR rtl-optimization/33673
+ * gcse.c (cprop_jump): If a conditional jump has been optimized
+ into unconditional jump, make the remaining normal edge fallthru
+ and delete the jump insn.
+
2007-11-01 Ben Elliston <bje@au.ibm.com>
* emit-rtl.c (set_reg_attrs_from_mem): Clarify function comment.
}
purge_dead_edges (bb);
+ /* If a conditional jump has been changed into unconditional jump, remove
+ the jump and make the edge fallthru - this is always called in
+ cfglayout mode. */
+ if (new != pc_rtx && simplejump_p (jump))
+ {
+ edge e;
+ edge_iterator ei;
+
+ for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); ei_next (&ei))
+ if (e->dest != EXIT_BLOCK_PTR
+ && BB_HEAD (e->dest) == JUMP_LABEL (jump))
+ {
+ e->flags |= EDGE_FALLTHRU;
+ break;
+ }
+ delete_insn (jump);
+ }
+
return 1;
}
+2007-11-01 Jakub Jelinek <jakub@redhat.com>
+
+ PR rtl-optimization/33673
+ * gcc.dg/pr33673.c: New test.
+
2007-11-01 Michael Matz <matz@suse.de>
PR tree-optimization/33961
--- /dev/null
+/* PR rtl-optimization/33673 */
+/* { dg-do compile } */
+/* { dg-options "-Os -fno-forward-propagate -fno-guess-branch-probability -fno-move-loop-invariants -fno-tree-dominator-opts -fno-tree-loop-optimize" } */
+
+extern int f1 (int);
+extern int f2 (int);
+
+extern int *a;
+
+static void
+find_reg (int n)
+{
+ int i, pass;
+ unsigned int used[2], used1[2];
+
+ int c = n ? f1 (a[1]) : f2 (a[1]);
+
+ for (i = 64, pass = 0; pass <= 1 && i >= 64; pass++)
+ {
+ if (pass == 1)
+ {
+ unsigned int *scan_tp_ = used;
+ unsigned int *scan_fp_ = used1;
+ int j;
+ for (j = 0; j < 2; j++)
+ *scan_tp_++ = *scan_fp_++;
+ }
+ for (i = 0; i < 64; i++)
+ {
+ int regno = i;
+ if (n == 0)
+ if (i == regno)
+ break;
+ }
+ }
+}
+
+void
+global_alloc ()
+{
+ find_reg (0);
+ find_reg (1);
+}