Better nop handling.

2013-12-08 13:17:50 -08:00
parent 50f53a483e
commit 28ff739449
2 changed files with 10 additions and 5 deletions
--- a/src/alloy/frontend/ppc/ppc_emit_alu.cc
+++ b/src/alloy/frontend/ppc/ppc_emit_alu.cc
@@ -800,6 +800,10 @@ XEEMITTER(orcx,         0x7C000338, X  )(PPCFunctionBuilder& f, InstrData& i) {

 XEEMITTER(ori,          0x60000000, D  )(PPCFunctionBuilder& f, InstrData& i) {
  // RA <- (RS) | (i48.0 || UI)
+  if (!i.D.RA && !i.D.RT && !i.D.DS) {
+    f.Nop();
+    return 0;
+  }
  Value* ra = f.Or(
      f.LoadGPR(i.D.RT),
      f.LoadConstant((uint64_t)i.D.DS));