From 2374c4b8375072da1f401c6daccc68ae76c73e63 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Fri, 13 Mar 2015 12:26:21 -0700
Subject: tcg/optimize: Handle or r,a,a with constant a

As seen with ubuntu-5.10-live-powerpc.iso.

Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 tcg/optimize.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'tcg/optimize.c')

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 067917c396..37c11103a6 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -980,8 +980,11 @@ static void tcg_constant_folding(TCGContext *s)
             if (temps_are_copies(args[1], args[2])) {
                 if (temps_are_copies(args[0], args[1])) {
                     tcg_op_remove(s, op);
-                } else {
+                } else if (temps[args[1]].state != TCG_TEMP_CONST) {
                     tcg_opt_gen_mov(s, op, args, opc, args[0], args[1]);
+                } else {
+                    tcg_opt_gen_movi(s, op, args, opc,
+                                     args[0], temps[args[1]].val);
                 }
                 continue;
             }
-- 
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