From: Aurelien Jarno <aurelien@aurel32.net>
Date: Thu, 6 Sep 2012 14:47:14 +0000 (+0200)
Subject: tcg/optimize: simplify or/xor r, a, 0 cases
X-Git-Tag: v1.2.1~223
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6c9785fb4b32c5291abb36003bbe5384ba6d9296;p=thirdparty%2Fqemu.git

tcg/optimize: simplify or/xor r, a, 0 cases

or/xor r, a, 0 is equivalent to a mov r, a.

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>
---

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 63f970d0451..0db849edbfd 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -331,6 +331,8 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
         CASE_OP_32_64(sar):
         CASE_OP_32_64(rotl):
         CASE_OP_32_64(rotr):
+        CASE_OP_32_64(or):
+        CASE_OP_32_64(xor):
             if (temps[args[1]].state == TCG_TEMP_CONST) {
                 /* Proceed with possible constant folding. */
                 break;