From: Richard Henderson <rth@cygnus.com>
Date: Sun, 16 Aug 1998 00:54:51 +0000 (-0700)
Subject: reload.c (find_equiv_reg): Reject equivalences separated by a volatile instruction.
X-Git-Tag: prereleases/egcs-1.1-prerelease~57
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2651814314a783077fee869730c664837f4db13f;p=thirdparty%2Fgcc.git

reload.c (find_equiv_reg): Reject equivalences separated by a volatile instruction.

�
        * reload.c (find_equiv_reg): Reject equivalences separated
        by a volatile instruction.

From-SVN: r21761
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e14fc70b037a..9685207a9873 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Sun Aug 16 01:53:21 1998  Richard Henderson  <rth@cygnus.com>
+
+	* reload.c (find_equiv_reg): Reject equivalences separated
+	by a volatile instruction.
+
 Sun Aug 16 00:21:44 1998 Franz Sirl <Franz.Sirl-kernel@lauterbach.com>
 
 	* rs6000/linux.h (CPP_OS_DEFAULT_SPEC): Define.
diff --git a/gcc/reload.c b/gcc/reload.c
index 1461cad5f832..b1483d19440a 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -6198,12 +6198,17 @@ find_equiv_reg (goal, insn, class, other, reload_reg_p, goalreg, mode)
 
       if (GET_RTX_CLASS (GET_CODE (p)) == 'i')
 	{
+	  pat = PATTERN (p);
+
+          /* Watch out for unspec_volatile, and volatile asms.  */
+          if (volatile_insn_p (pat))
+	    return 0;
+
 	  /* If this insn P stores in either GOAL or VALUE, return 0.
 	     If GOAL is a memory ref and this insn writes memory, return 0.
 	     If GOAL is a memory ref and its address is not constant,
 	     and this insn P changes a register used in GOAL, return 0.  */
 
-	  pat = PATTERN (p);
 	  if (GET_CODE (pat) == SET || GET_CODE (pat) == CLOBBER)
 	    {
 	      register rtx dest = SET_DEST (pat);