tcg-ppc: 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>
qemu · Sep 25, 2013 · 4b2b114 · 4b2b114
1 parent 619f90b
commit 4b2b114
Showing 1 changed file with 3 additions and 1 deletion.
diff --git 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,