From: Richard Henderson <rth@twiddle.net>
To: qemu-devel@nongnu.org
Cc: "Vassili Karpov (malc)" <av1474@comtv.ru>,
aurelien@aurel32.net, Richard Henderson <rth@twiddle.net>
Subject: [Qemu-devel] [PATCH 05/14] tcg-ppc64: Avoid code for nop move
Date: Sun, 1 Sep 2013 09:16:04 -0700 [thread overview]
Message-ID: <1378052173-3579-6-git-send-email-rth@twiddle.net> (raw)
In-Reply-To: <1378052173-3579-1-git-send-email-rth@twiddle.net>
While these are rare from code that's been through the optimizer,
it's not uncommon within the tcg backend.
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
tcg/ppc64/tcg-target.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c
index da82411..8a43a14 100644
--- a/tcg/ppc64/tcg-target.c
+++ b/tcg/ppc64/tcg-target.c
@@ -509,7 +509,9 @@ static const uint32_t tcg_to_isel[] = {
static inline void tcg_out_mov(TCGContext *s, TCGType type,
TCGReg ret, TCGReg arg)
{
- tcg_out32(s, OR | SAB(arg, ret, arg));
+ if (ret != arg) {
+ tcg_out32(s, OR | SAB(arg, ret, arg));
+ }
}
static inline void tcg_out_rld(TCGContext *s, int op, TCGReg ra, TCGReg rs,
--
1.8.3.1
next prev parent reply other threads:[~2013-09-01 16:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-01 16:15 [Qemu-devel] [PATCH 00/14] tcg-ppc64 improvements Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 01/14] tcg-ppc64: Reformat tcg-target.c Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 02/14] tcg-ppc64: More use of TAI and SAI helper macros Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 03/14] tcg-ppc64: Use TCG_REG_Rn constants Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 04/14] tcg-ppc64: Use tcg_out64 Richard Henderson
2013-09-01 16:16 ` Richard Henderson [this message]
2013-09-01 16:16 ` [Qemu-devel] [PATCH 06/14] tcg-ppc64: Don't load the static chain from TCG Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 07/14] tcg-ppc64: Fold constant call address into descriptor load Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 08/14] tcg-ppc64: Look through a constant function descriptor Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 09/14] tcg-ppc64: Tidy register allocation order Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 10/14] tcg-ppc64: Handle long offsets better Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 11/14] tcg-ppc64: Implement tcg_register_jit Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 12/14] tcg-ppc64: Streamline tcg_out_tlb_read Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 13/14] tcg-ppc64: Add _noaddr functions for emitting forward branches Richard Henderson
2013-09-01 16:16 ` [Qemu-devel] [PATCH 14/14] tcg-ppc64: Implement CONFIG_QEMU_LDST_OPTIMIZATION Richard Henderson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1378052173-3579-6-git-send-email-rth@twiddle.net \
--to=rth@twiddle.net \
--cc=aurelien@aurel32.net \
--cc=av1474@comtv.ru \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).