Revert "Add DoubleTestOp instruction"

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 2b75b2acf41b5d430e7d5ee29d1d4b11bc9fe299..6e1770921cb6944530310777e32e21e84b8b48d7 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -3760,52 +3760,6 @@ void BinaryDoubleOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 }
 
 
-LocationSummary* DoubleTestOpInstr::MakeLocationSummary(Zone* zone,
-                                                        bool opt) const {
-  const intptr_t kNumInputs = 1;
-  const intptr_t kNumTemps = 0;
-  LocationSummary* summary = new(zone) LocationSummary(
-      zone, kNumInputs, kNumTemps, LocationSummary::kNoCall);
-  summary->set_in(0, Location::RequiresFpuRegister());
-  summary->set_out(0, Location::RequiresRegister());
-  return summary;
-}
-
-
-void DoubleTestOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
-  ASSERT(compiler->is_optimizing());
-  const XmmRegister value = locs()->in(0).fpu_reg();
-  const Register result = locs()->out(0).reg();
-  if (op_kind() == MethodRecognizer::kDouble_getIsNaN) {
-    Label is_nan;
-    __ LoadObject(result, Bool::True());
-    __ comisd(value, value);
-    __ j(PARITY_EVEN, &is_nan, Assembler::kNearJump);
-    __ LoadObject(result, Bool::False());
-    __ Bind(&is_nan);
-  } else {
-    ASSERT(op_kind() == MethodRecognizer::kDouble_getIsInfinite);
-    Label is_inf, done;
-    __ AddImmediate(RSP, Immediate(-kDoubleSize));
-    __ movsd(Address(RSP, 0), value);
-    __ movq(result, Address(RSP, 0));
-    // Mask off the sign.
-    __ AndImmediate(result, Immediate(0x7FFFFFFFFFFFFFFFLL));
-    // Compare with +infinity.
-    __ CompareImmediate(result, Immediate(0x7FF0000000000000LL));
-    __ j(EQUAL, &is_inf, Assembler::kNearJump);
-    __ LoadObject(result, Bool::False());
-    __ jmp(&done);
-
-    __ Bind(&is_inf);
-    __ LoadObject(result, Bool::True());
-
-    __ Bind(&done);
-    __ AddImmediate(RSP, Immediate(kDoubleSize));
-  }
-}
-
-
 LocationSummary* BinaryFloat32x4OpInstr::MakeLocationSummary(Zone* zone,
                                                              bool opt) const {
   const intptr_t kNumInputs = 2;