[intrinsics] Drop the now obsolete %_DoubleHi and %_DoubleLo intrinsics.

src/crankshaft/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 12731 matching lines @@
 void HOptimizedGraphBuilder::GenerateRegExpSource(CallRuntime* call) {
   DCHECK_EQ(1, call->arguments()->length());
   CHECK_ALIVE(VisitExpressions(call->arguments()));
   HValue* regexp = Pop();
   HInstruction* result =
       New<HLoadNamedField>(regexp, nullptr, HObjectAccess::ForJSRegExpSource());
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
-void HOptimizedGraphBuilder::GenerateDoubleLo(CallRuntime* call) {
-  DCHECK_EQ(1, call->arguments()->length());
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  HValue* value = Pop();
-  HInstruction* result = NewUncasted<HDoubleBits>(value, HDoubleBits::LOW);
-  return ast_context()->ReturnInstruction(result, call->id());
-}
-
-
-void HOptimizedGraphBuilder::GenerateDoubleHi(CallRuntime* call) {
-  DCHECK_EQ(1, call->arguments()->length());
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  HValue* value = Pop();
-  HInstruction* result = NewUncasted<HDoubleBits>(value, HDoubleBits::HIGH);
-  return ast_context()->ReturnInstruction(result, call->id());
-}
-
-
 // Construct a RegExp exec result with two in-object properties.
 void HOptimizedGraphBuilder::GenerateRegExpConstructResult(CallRuntime* call) {
   DCHECK_EQ(3, call->arguments()->length());
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
   CHECK_ALIVE(VisitForValue(call->arguments()->at(2)));
   HValue* input = Pop();
   HValue* index = Pop();
   HValue* length = Pop();
   HValue* result = BuildRegExpConstructResult(length, index, input);
@@ skipping 893 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8