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[Qemu-devel] [PATCH v2 4/7] tcg-ppc: Avoid code for nop move
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v2 4/7] tcg-ppc: Avoid code for nop move |
Date: |
Mon, 9 Sep 2013 17:28:19 -0700 |
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 <address@hidden>
---
tcg/ppc/tcg-target.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index 24a8621..965108b 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -450,7 +450,9 @@ static const uint32_t tcg_to_bc[] = {
static 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 void tcg_out_movi(TCGContext *s, TCGType type,
--
1.8.3.1
- [Qemu-devel] [PATCH v2 0/7] tcg-ppc qemu_ldst improvements, Richard Henderson, 2013/09/09
- [Qemu-devel] [PATCH v2 3/7] configure: Allow command-line configure for ppc32, Richard Henderson, 2013/09/09
- [Qemu-devel] [PATCH v2 4/7] tcg-ppc: Avoid code for nop move,
Richard Henderson <=
- [Qemu-devel] [PATCH v2 6/7] tcg-ppc: Use conditional branch and link to slow path, Richard Henderson, 2013/09/09
- [Qemu-devel] [PATCH v2 5/7] tcg-ppc: Cleanup tcg_out_qemu_ld/st_slow_path, Richard Henderson, 2013/09/09
- [Qemu-devel] [PATCH v2 1/7] tcg-ppc: fix qemu_ld/qemu_st for AIX ABI, Richard Henderson, 2013/09/09
- [Qemu-devel] [PATCH v2 2/7] tcg-ppc: use new return-argument ld/st helpers, Richard Henderson, 2013/09/09
- [Qemu-devel] [PATCH v2 7/7] tcg-ppc: Fix and cleanup tcg_out_tlb_check, Richard Henderson, 2013/09/09
- Re: [Qemu-devel] [PATCH v2 0/7] tcg-ppc qemu_ldst improvements, Paolo Bonzini, 2013/09/10