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authorRichard Henderson <rth@twiddle.net>2013-07-30 18:26:04 -1000
committerRichard Henderson <rth@twiddle.net>2013-09-25 07:46:32 -0700
commitf8b84129073d600cef20d526814b9bdd15c2e1ba (patch)
tree9a5b2f9a47ac5131f4a7adc632eb91e91a47d370
parent5e0f40cfedecfbc2a0608d75e8a8d22173f23431 (diff)
tcg-ppc64: Avoid code for nop move
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>
-rw-r--r--tcg/ppc64/tcg-target.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c
index 27a955ba2a..357f8c11de 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,