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[Qemu-devel] [PATCH 5/9] tcg/optimize: optimize "op r, a, a => mov r, a"
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH 5/9] tcg/optimize: optimize "op r, a, a => mov r, a" |
Date: |
Wed, 19 Sep 2012 22:00:19 +0200 |
Now that we can easily detect all copies, we can optimize the
"op r, a, a => mov r, a" case a bit more.
Signed-off-by: Aurelien Jarno <address@hidden>
---
tcg/optimize.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index a58de3b..cfee690 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -503,7 +503,7 @@ 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 {
--
1.7.10.4
- [Qemu-devel] [PATCH 2/9] tcg/optimizer: check types in copy propagation, (continued)
- [Qemu-devel] [PATCH 7/9] tcg/optimize: further optimize brcond/setcond, Aurelien Jarno, 2012/09/19
- [Qemu-devel] [PATCH 8/9] tcg/optimize: prefer the "op a, a, b" form for commutative ops, Aurelien Jarno, 2012/09/19
- [Qemu-devel] [PATCH 3/9] tcg/optimizer: rework copy progagation, Aurelien Jarno, 2012/09/19
- [Qemu-devel] [PATCH 5/9] tcg/optimize: optimize "op r, a, a => mov r, a",
Aurelien Jarno <=
- Re: [Qemu-devel] [PATCH 0/9] tcg/optimize: rework copy propagation, Laurent Desnogues, 2012/09/21