From: Doug Evans <dje@gnu.org>
Date: Sat, 8 Jan 1994 19:56:03 +0000 (+0000)
Subject: (rest_of_compilation): jump_optimize can change max_reg_num so rerun reg_scan
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9e9b48a4a2f611d7714ccb494b3072ae6a2a2b00;p=gcc.git

(rest_of_compilation): jump_optimize can change max_reg_num so rerun reg_scan
before calling cse_main.

From-SVN: r6360
---

diff --git a/gcc/toplev.c b/gcc/toplev.c
index e98e548a757..569e0699a73 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -2561,10 +2561,13 @@ rest_of_compilation (decl)
     {
       /* Running another jump optimization pass before the second
 	 cse pass sometimes simplifies the RTL enough to allow
-	 the second CSE pass to do a better job.  */
-      TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
+	 the second CSE pass to do a better job.  Jump_optimize can change
+	 max_reg_num so we must rerun reg_scan afterwards.
+	 ??? Rework to not call reg_scan so often.  */
+      TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
       TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
 
+      TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
       TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
 					  1, cse2_dump_file));
       if (tem)