reload.c (push_reload): When seeing if can reuse a register...

	* reload.c (push_reload): When seeing if can reuse a register,
	check extra registers against widest of INMODE and OUTMODE.

From-SVN: r34891

gcc/ChangeLog

+Thu Jul  6 18:30:36 2000  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+
+	* reload.c (push_reload): When seeing if can reuse a register,
+	check extra registers against widest of INMODE and OUTMODE.
+
 2000-07-06  Neil Booth  <NeilB@earthling.net>
 
 	* cpplib.c: (_cpp_parse_assertion):  Perform hash lookups

gcc/reload.c

@@ -1470,8 +1470,10 @@ push_reload (in, out, inloc, outloc, class,
 	    && GET_MODE_SIZE (outmode) <= GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
 	    && HARD_REGNO_MODE_OK (regno, outmode))
 	  {
-	    int offs;
-	    int nregs = HARD_REGNO_NREGS (regno, inmode);
+	    unsigned int offs;
+	    unsigned int nregs = MAX (HARD_REGNO_NREGS (regno, inmode),
+				      HARD_REGNO_NREGS (regno, outmode));
+
 	    for (offs = 0; offs < nregs; offs++)
 	      if (fixed_regs[regno + offs]
 		  || ! TEST_HARD_REG_BIT (reg_class_contents[(int) class],