* loop.c (strength_reduce): Avoid taking PATTERN of a label.

From-SVN: r12965

diff --git a/gcc/loop.c b/gcc/loop.c
index 6646e9b4eb6e0171f46c8effa5af9b3c01184f87..3d07320458b12185092551191ed33d81ea69f2b0 100644 (file)
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -3952,12 +3952,18 @@ strength_reduce (scan_start, end, loop_top, insn_count,
                    auto_inc_opt = 1;
 
 #ifdef HAVE_cc0
-                 /* We can't put an insn immediately after one setting
-                    cc0, or immediately before one using cc0.  */
-                 if ((auto_inc_opt == 1 && sets_cc0_p (PATTERN (v->insn)))
-                     || (auto_inc_opt == -1
-                         && sets_cc0_p (PATTERN (prev_nonnote_insn (v->insn)))))
-                   auto_inc_opt = 0;
+                 {
+                   rtx prev;
+
+                   /* We can't put an insn immediately after one setting
+                      cc0, or immediately before one using cc0.  */
+                   if ((auto_inc_opt == 1 && sets_cc0_p (PATTERN (v->insn)))
+                       || (auto_inc_opt == -1
+                           && (prev = prev_nonnote_insn (v->insn)) != 0
+                           && GET_RTX_CLASS (GET_CODE (prev)) == 'i'
+                           && sets_cc0_p (PATTERN (prev))))
+                     auto_inc_opt = 0;
+                 }
 #endif
 
                  if (auto_inc_opt)