From: Richard Henderson <rth@cygnus.com>
Date: Sun, 7 Mar 1999 02:00:27 +0000 (-0800)
Subject: * cse.c (canon_hash): Never reject hard regs in CCmode.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9a794e5054a24e53cab41cc28ffcdf263c10776d;p=gcc.git

* cse.c (canon_hash): Never reject hard regs in CCmode.

From-SVN: r25623
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3b02ecc6be0..ff6278307d1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Sun Mar  7 01:58:47 1999  Richard Henderson  <rth@cygnus.com>
+
+	* cse.c (canon_hash): Never reject hard regs in CCmode.
+
 Sun Mar 7 01:15:04 PST 1999 Jeff Law  (law@cygnus.com)
 
 	* version.c: Bump for snapshot.
diff --git a/gcc/cse.c b/gcc/cse.c
index 0852615d031..7d9690899e5 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -2009,7 +2009,12 @@ canon_hash (x, mode)
 
 	/* On some machines, we can't record any non-fixed hard register,
 	   because extending its life will cause reload problems.  We
-	   consider ap, fp, and sp to be fixed for this purpose.
+	   consider ap, fp, and sp to be fixed for this purpose. 
+
+	   We also consider CCmode registers to be fixed for this purpose;
+	   failure to do so leads to failure to simplify 0<100 type of
+	   conditionals.
+
 	   On all machines, we can't record any global registers.  */
 
 	if (regno < FIRST_PSEUDO_REGISTER
@@ -2019,7 +2024,8 @@ canon_hash (x, mode)
 		    && regno != FRAME_POINTER_REGNUM
 		    && regno != HARD_FRAME_POINTER_REGNUM
 		    && regno != ARG_POINTER_REGNUM
-		    && regno != STACK_POINTER_REGNUM)))
+		    && regno != STACK_POINTER_REGNUM
+		    && GET_MODE_CLASS (GET_MODE (x)) != MODE_CC)))
 	  {
 	    do_not_record = 1;
 	    return 0;