From: Richard Kenner <kenner@gcc.gnu.org>
Date: Sat, 3 Apr 1993 22:39:33 +0000 (-0500)
Subject: (emit_reload_insns): Don't update the status of a register from an
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2c9ce2effc5b3946371d14fe7ae093d6ac1bc112;p=gcc.git

(emit_reload_insns): Don't update the status of a register from an
input reload if it also has an output reload.

From-SVN: r3994
---

diff --git a/gcc/reload1.c b/gcc/reload1.c
index e6302c211cd..bcbd68f5916 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -6148,11 +6148,15 @@ emit_reload_insns (insn)
 		}
 	    }
 
-	  /* Maybe the spill reg contains a copy of reload_in.  */
+	  /* Maybe the spill reg contains a copy of reload_in.  Only do
+	     something if there will not be an output reload for
+	     the register being reloaded.  */
 	  else if (reload_out[r] == 0
 		   && reload_in[r] != 0
-		   && (GET_CODE (reload_in[r]) == REG
-		       || GET_CODE (reload_in_reg[r]) == REG))
+		   && ((GET_CODE (reload_in[r]) == REG
+			&& ! reg_has_output_reload[REGNO (reload_in[r])]
+		       || (GET_CODE (reload_in_reg[r]) == REG
+			   && ! reg_has_output_reload[REGNO (reload_in_reg[r])]))))
 	    {
 	      register int nregno;
 	      int nnr;