From: Graham Stott <graham.stott@btinternet.com>
Date: Mon, 11 Nov 2002 03:36:01 +0000 (+0000)
Subject: re PR middle-end/8502 (wrong code generated for switch statement)
X-Git-Tag: releases/gcc-3.2.1~37
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e85f1e87fb029297c0311d83fb2a656819abd20;p=thirdparty%2Fgcc.git

re PR middle-end/8502 (wrong code generated for switch statement)


        PR 8502
        * cfgrtl.c (try_redirect_by_replacing_jump): Do not kill computed
        jumps post reload.

Co-Authored-By: Jan Hubicka <jh@suse.cz>

From-SVN: r59003
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 40983df71fae..0b5f968587f5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2002-11-11  Graham Stott  <graham.stott@btinternet.com>
+	    Jan Hubicka  <jh@suse.cz>
+
+	PR 8502
+	* cfgrtl.c (try_redirect_by_replacing_jump): Do not kill computed
+	jumps post reload.
+
 2002-11-08  H.J. Lu <hjl@gnu.org>
 
 	Fix c/5351 and optimization/7591.
diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index bbcdfbb1bfc5..e2cb773379a1 100644
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -665,6 +665,7 @@ try_redirect_by_replacing_jump (e, target)
   edge tmp;
   rtx set;
   int fallthru = 0;
+  rtx table;
 
   /* Verify that all targets will be TARGET.  */
   for (tmp = src->succ; tmp; tmp = tmp->succ_next)
@@ -674,6 +675,13 @@ try_redirect_by_replacing_jump (e, target)
   if (tmp || !onlyjump_p (insn))
     return false;
 
+  if (reload_completed && JUMP_LABEL (insn)
+      && (table = NEXT_INSN (JUMP_LABEL (insn))) != NULL_RTX
+      && GET_CODE (table) == JUMP_INSN
+      && (GET_CODE (PATTERN (table)) == ADDR_VEC
+	  || GET_CODE (PATTERN (table)) == ADDR_DIFF_VEC))
+    return false;
+
   /* Avoid removing branch with side effects.  */
   set = single_set (insn);
   if (!set || side_effects_p (set))