qemu/0072-tcg-optimize-optimize-op-r-a-a-mov-r-a.patch

From e38329760e40a354e37d11c7f5d8c86cdb90736c Mon Sep 17 00:00:00 2001
From: Aurelien Jarno <aurelien@aurel32.net>
Date: Tue, 18 Sep 2012 19:11:32 +0200
Subject: [PATCH] tcg/optimize: optimize "op r, a, a => mov r, a"

Now that we can easily detect all copies, we can optimize the
"op r, a, a => mov r, a" case a bit more.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 tcg/optimize.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tcg/optimize.c b/tcg/optimize.c
index aeb2225..b9a7da9 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -524,7 +524,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
         switch (op) {
         CASE_OP_32_64(or):
         CASE_OP_32_64(and):
-            if (args[1] == args[2]) {
+            if (temps_are_copies(args[1], args[2])) {
                 if (temps_are_copies(args[0], args[1])) {
                     gen_opc_buf[op_index] = INDEX_op_nop;
                 } else {
-- 
1.8.0.2