From: Jim Wilson <wilson@cygnus.com>
Date: Fri, 7 Nov 1997 23:36:53 +0000 (+0000)
Subject: flags.h (flag_rerun_loop_opt): Declare.
X-Git-Tag: releases/egcs-1.0.0~153
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a594134ed1bf406116c1cc24b5f1bab7487cb5d1;p=thirdparty%2Fgcc.git

flags.h (flag_rerun_loop_opt): Declare.

        * flags.h (flag_rerun_loop_opt): Declare.
        * loop.c (invariant_p, case LABEL_REF): Check flag_rerun_loop_opt.
        * toplev.c (flag_rerum_loop_opt): Delete static.

From-SVN: r16362
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0c7db123279e..d64890eff37c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Fri Nov  7 16:23:20 1997  Jim Wilson  (wilson@cygnus.com)
+
+	* flags.h (flag_rerun_loop_opt): Declare.
+	* loop.c (invariant_p, case LABEL_REF): Check flag_rerun_loop_opt.
+	* toplev.c (flag_rerum_loop_opt): Delete static.
+
 Fri Nov  7 10:22:24 1997  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* frame.c (add_fdes, count_fdes): Go back to checking pc_begin for
diff --git a/gcc/flags.h b/gcc/flags.h
index 5b3c7639e064..ba057204dede 100644
--- a/gcc/flags.h
+++ b/gcc/flags.h
@@ -275,6 +275,10 @@ extern int flag_volatile_global;
 
 extern int flag_fast_math;
 
+/* Nonzero means to run loop optimizations twice.  */
+
+extern int flag_rerun_loop_opt;
+
 /* Nonzero means make functions that look like good inline candidates
    go inline.  */
 
diff --git a/gcc/loop.c b/gcc/loop.c
index 73f347fd86f3..4bd965d49a55 100644
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -2833,7 +2833,12 @@ invariant_p (x)
 
 	 We don't know the loop bounds here though, so just fail for all
 	 labels.  */
-      if (flag_unroll_loops)
+      /* ??? This is also necessary if flag_rerun_loop_opt is true, because in
+	 this case we may be doing loop unrolling the second time we run loop,
+	 and hence the first loop run also needs this check.  There is no way
+	 to check here whether the second run will actually do loop unrolling
+	 though, as that info is in a local var in rest_of_compilation.  */
+      if (flag_unroll_loops || flag_rerun_loop_opt)
 	return 0;
       else
 	return 1;
diff --git a/gcc/toplev.c b/gcc/toplev.c
index c36554f1c83e..fbde9e2796f1 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -507,7 +507,7 @@ static int flag_rerun_cse_after_loop;
 
 /* Nonzero means to run loop optimizations twice.  */
 
-static int flag_rerun_loop_opt;
+int flag_rerun_loop_opt;
 
 /* Nonzero for -finline-functions: ok to inline functions that look like
    good inline candidates.  */