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[Qemu-devel] [PULL 12/21] tcg-ppc64: Avoid code for nop move
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 12/21] tcg-ppc64: Avoid code for nop move |
Date: |
Wed, 25 Sep 2013 09:27:29 -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/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 27a955b..357f8c1 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,
--
1.8.1.4
- [Qemu-devel] [PULL 03/21] tcg-ppc: use new return-argument ld/st helpers, (continued)
- [Qemu-devel] [PULL 03/21] tcg-ppc: use new return-argument ld/st helpers, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 04/21] tcg-ppc: Avoid code for nop move, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 05/21] tcg-ppc: Cleanup tcg_out_qemu_ld/st_slow_path, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 06/21] tcg-ppc: Use conditional branch and link to slow path, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 02/21] tcg-ppc: fix qemu_ld/qemu_st for AIX ABI, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 07/21] tcg-ppc: Fix and cleanup tcg_out_tlb_check, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 08/21] tcg-ppc64: Reformat tcg-target.c, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 09/21] tcg-ppc64: More use of TAI and SAI helper macros, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 11/21] tcg-ppc64: Use tcg_out64, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 10/21] tcg-ppc64: Use TCG_REG_Rn constants, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 12/21] tcg-ppc64: Avoid code for nop move,
Richard Henderson <=
- [Qemu-devel] [PULL 13/21] tcg-ppc64: Don't load the static chain from TCG, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 14/21] tcg-ppc64: Fold constant call address into descriptor load, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 15/21] tcg-ppc64: Look through a constant function descriptor, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 16/21] tcg-ppc64: Tidy register allocation order, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 17/21] tcg-ppc64: Handle long offsets better, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 18/21] tcg-ppc64: Implement tcg_register_jit, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 19/21] tcg-ppc64: Streamline tcg_out_tlb_read, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 20/21] tcg-ppc64: Add _noaddr functions for emitting forward branches, Richard Henderson, 2013/09/25
- [Qemu-devel] [PULL 21/21] tcg-ppc64: Implement CONFIG_QEMU_LDST_OPTIMIZATION, Richard Henderson, 2013/09/25