From: Jim Wilson <wilson@gcc.gnu.org>
Date: Sun, 14 Aug 1994 23:13:22 +0000 (-0700)
Subject: (loop_iterations): Use PREV_INSN not prev_nonnote_insn.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=40e81af5f03b079ca6d0dfefc5e5f13241b66271;p=gcc.git

(loop_iterations): Use PREV_INSN not prev_nonnote_insn.

From-SVN: r7925
---

diff --git a/gcc/unroll.c b/gcc/unroll.c
index fafa627e24d..7a3c4f9b8e1 100644
--- a/gcc/unroll.c
+++ b/gcc/unroll.c
@@ -3093,7 +3093,11 @@ loop_iterations (loop_start, loop_end)
   loop_final_value = 0;
   loop_iteration_var = 0;
 
-  last_loop_insn = prev_nonnote_insn (loop_end);
+  /* We used to use pren_nonnote_insn here, but that fails because it might
+     accidentally get the branch for a contained loop if the branch for this
+     loop was deleted.  We can only trust branches immediately before the
+     loop_end.  */
+  last_loop_insn = PREV_INSN (loop_end);
 
   comparison = get_condition_for_loop (last_loop_insn);
   if (comparison == 0)