X87: enable snapshot

src/x87/lithium-x87.cc

 // Copyright 2012 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/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/hydrogen-osr.h"
 #include "src/lithium-inl.h"
@@ skipping 2036 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
   Representation r = instr->representation();
   if (r.IsSmi()) {
     return DefineAsRegister(new(zone()) LConstantS);
   } else if (r.IsInteger32()) {
     return DefineAsRegister(new(zone()) LConstantI);
   } else if (r.IsDouble()) {
-    double value = instr->DoubleValue();
-    bool value_is_zero = BitCast<uint64_t, double>(value) == 0;
-    LOperand* temp = value_is_zero ? NULL : TempRegister();
-    return DefineAsRegister(new(zone()) LConstantD(temp));
+    return DefineAsRegister(new(zone()) LConstantD);
   } else if (r.IsExternal()) {
     return DefineAsRegister(new(zone()) LConstantE);
   } else if (r.IsTagged()) {
     return DefineAsRegister(new(zone()) LConstantT);
   } else {
     UNREACHABLE();
     return NULL;
   }
 }
 
@@ skipping 170 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
   if (!instr->is_typed_elements()) {
     DCHECK(instr->elements()->representation().IsTagged());
     DCHECK(instr->key()->representation().IsInteger32() ||
            instr->key()->representation().IsSmi());
 
     if (instr->value()->representation().IsDouble()) {
       LOperand* object = UseRegisterAtStart(instr->elements());
-      LOperand* val = NULL;
-      val = UseRegisterAtStart(instr->value());
+      // For storing double hole, no fp register required.
+      LOperand* val = instr->IsConstantHoleStore()
+          ? NULL : UseRegisterAtStart(instr->value());
       LOperand* key = UseRegisterOrConstantAtStart(instr->key());
       return new(zone()) LStoreKeyed(object, key, val);
     } else {
       DCHECK(instr->value()->representation().IsSmiOrTagged());
       bool needs_write_barrier = instr->NeedsWriteBarrier();
 
       LOperand* obj = UseRegister(instr->elements());
       LOperand* val;
       LOperand* key;
       if (needs_write_barrier) {
@@ skipping 415 matching lines @@
   LOperand* function = UseRegisterAtStart(instr->function());
   LAllocateBlockContext* result =
       new(zone()) LAllocateBlockContext(context, function);
   return MarkAsCall(DefineFixed(result, esi), instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87