Fix m68k-aout build failure. Invalid insn abort while compiling newlib.

	* reload1.c (reload_as_needed): When rewrite POST_INC, verify
	reg_reloaded_contents matches incremented pseudo.

From-SVN: r23235

gcc/ChangeLog

 Thu Oct 22 22:34:42 1998  Jim Wilson  <wilson@cygnus.com>
 
+	* reload1.c (reload_as_needed): When rewrite POST_INC, verify
+	reg_reloaded_contents matches incremented pseudo.
+
 	* v850/v850.c (v850_reorg): Call alter_subreg.  Delete subreg support.
 
 Fri Oct 23 11:11:56 1998  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>

gcc/reload1.c

@@ -4478,7 +4478,12 @@ reload_as_needed (live_known)
 		     or we can't use the reload register for inheritance.  */
 		  if ((code == POST_INC || code == POST_DEC)
 		      && TEST_HARD_REG_BIT (reg_reloaded_valid,
-					    REGNO (reload_reg_rtx[i])))
+					    REGNO (reload_reg_rtx[i]))
+		      /* Make sure it is the inc/dec pseudo, and not
+			 some other (e.g. output operand) pseudo.  */
+		      && (reg_reloaded_contents[REGNO (reload_reg_rtx[i])]
+			  == REGNO (XEXP (in_reg, 0))))
+					      
 		    {
 		      rtx reload_reg = reload_reg_rtx[i];
 		      enum machine_mode mode = GET_MODE (reload_reg);