From: Richard Kenner <kenner@gcc.gnu.org>
Date: Wed, 28 Oct 1992 22:05:59 +0000 (-0500)
Subject: (gen_input_reload): In PLUS, if OP0 and OP1 are the same, use
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=39b56c2ac762c1f0516315dee6e79cd69527378d;p=gcc.git

(gen_input_reload): In PLUS, if OP0 and OP1 are the same, use
RELOADREG when generating the addition.

From-SVN: r2643
---

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 88c5e6dd2e3..f1933d730f2 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -5753,6 +5753,14 @@ gen_input_reload (reloadreg, in, before_insn)
 	tem = op0, op0 = op1, op1 = tem;
 
       emit_insn_before (gen_move_insn (reloadreg, op0), before_insn);
+
+      /* If OP0 and OP1 are the same, we can use RELOADREG for OP1.
+	 This fixes a problem on the 32K where the stack pointer cannot
+	 be used as an operand of an add insn.  */
+
+      if (rtx_equal_p (op0, op1))
+	op1 = reloadreg;
+
       emit_insn_before (gen_add2_insn (reloadreg, op1), before_insn);
     }