From: Aurelien Jarno <aurelien@aurel32.net>
Date: Thu, 6 Sep 2012 14:47:14 +0000 (+0200)
Subject: tcg/optimize: simplify and r, a, 0 cases
X-Git-Tag: v1.2.1~222
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f66f1dab29c86f88e5904eb628b90b1be8aed61a;p=thirdparty%2Fqemu.git

tcg/optimize: simplify and r, a, 0 cases

and r, a, 0 is equivalent to a movi r, 0.

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 0db849edbfd..c12cb2bc4b2 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -360,6 +360,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
 
         /* Simplify expression for "op r, a, 0 => movi r, 0" cases */
         switch (op) {
+        CASE_OP_32_64(and):
         CASE_OP_32_64(mul):
             if ((temps[args[2]].state == TCG_TEMP_CONST
                 && temps[args[2]].val == 0)) {