cse.c (cse_insn): If an insn has only a single set...

        * cse.c (cse_insn): If an insn has only a single set, SRC_EQV
        is nonzero and the single set does not have an elt, then assign
        it an elt.

From-SVN: r30304

gcc/ChangeLog

@@ -34,6 +34,10 @@ Sun Oct 31 13:32:15 CET 1999  Marc Lehmann <pcg@goof.com>
 
 Sun Oct 31 01:53:30 1999  Jeffrey A Law  (law@cygnus.com)
 
+	* cse.c (cse_insn): If an insn has only a single set, SRC_EQV
+	is nonzero and the single set does not have an elt, then assign
+	it an elt.
+
 	* simplify-rtx.c: New file.
 	* Makefile.in (OBJS): Add simplify-rtx.o
 	(simplify-rtx.o): Add dependencies.

gcc/cse.c

@@ -5733,8 +5733,9 @@ cse_insn (insn, libcall_insn)
 	 does not yet have an elt, and if so set the elt of the set source
 	 to src_eqv_elt.  */
       for (i = 0; i < n_sets; i++)
-	if (sets[i].rtl && sets[i].src_elt == 0
-	    && rtx_equal_p (SET_SRC (sets[i].rtl), src_eqv))
+	if (n_sets == 1
+	    || (sets[i].rtl && sets[i].src_elt == 0
+		&& rtx_equal_p (SET_SRC (sets[i].rtl), src_eqv)))
 	  sets[i].src_elt = src_eqv_elt;
     }