reload1.c (choose_reload_regs): If using an equivalence from find_equiv_reg and…

reload1.c (choose_reload_regs): If using an equivalence from find_equiv_reg and reg_reloaded_valid is not set...

	* reload1.c (choose_reload_regs): If using an equivalence from
	find_equiv_reg and reg_reloaded_valid is not set for this register,
	clear the associated spill_reg_store.

From-SVN: r21035

gcc/ChangeLog

+Thu Jul  9 18:24:56 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* reload1.c (choose_reload_regs): If using an equivalence from
+	find_equiv_reg and reg_reloaded_valid is not set for this register,
+	clear the associated spill_reg_store.
+
 Thu Jul  9 18:12:49 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
 
 	* reload1.c (emit_reload_insns): If an output reload copies only

gcc/reload1.c

@@ -5861,6 +5861,12 @@ choose_reload_regs (insn, avoid_return_reg)
 		  reload_reg_rtx[r] = equiv;
 		  reload_inherited[r] = 1;
 
+		  /* If reg_reloaded_valid is not set for this register,
+		     there might be a stale spill_reg_store lying around.
+		     We must clear it, since otherwise emit_reload_insns
+		     might delete the store.  */
+		  if (! TEST_HARD_REG_BIT (reg_reloaded_valid, regno))
+		    spill_reg_store[regno] = NULL_RTX;
 		  /* If any of the hard registers in EQUIV are spill
 		     registers, mark them as in use for this insn.  */
 		  for (k = 0; k < nr; k++)