Convert FastNewClosureStub into hydrogen.

src/ia32/code-stubs-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 25 matching lines @@
 #include "regexp-macro-assembler.h"
 #include "runtime.h"
 #include "stub-cache.h"
 #include "codegen.h"
 #include "runtime.h"
 
 namespace v8 {
 namespace internal {
 
 
+void FastNewClosureStub::InitializeInterfaceDescriptor(
+    Isolate* isolate,
+    CodeStubInterfaceDescriptor* descriptor) {
+  static Register registers[] = { ebx };
+  descriptor->register_param_count_ = 1;
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ =
+      Runtime::FunctionForId(Runtime::kNewClosureFromStubFailure)->entry;
+}
+
+
 void ToNumberStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {
   static Register registers[] = { eax };
   descriptor->register_param_count_ = 1;
   descriptor->register_params_ = registers;
   descriptor->deoptimization_handler_ = NULL;
 }
 
 
@@ skipping 236 matching lines @@
       __ push(descriptor->register_params_[i]);
     }
     ExternalReference miss = descriptor->miss_handler();
     __ CallExternalReference(miss, descriptor->register_param_count_);
   }
 
   __ ret(0);
 }
 
 
-void FastNewClosureStub::Generate(MacroAssembler* masm) {
-  // Create a new closure from the given function info in new
-  // space. Set the context to the current context in esi.
-  Counters* counters = masm->isolate()->counters();
-
-  Label gc;
-  __ Allocate(JSFunction::kSize, eax, ebx, ecx, &gc, TAG_OBJECT);
-
-  __ IncrementCounter(counters->fast_new_closure_total(), 1);
-
-  // Get the function info from the stack.
-  __ mov(edx, Operand(esp, 1 * kPointerSize));
-
-  int map_index = Context::FunctionMapIndex(language_mode_, is_generator_);
-
-  // Compute the function map in the current native context and set that
-  // as the map of the allocated object.
-  __ mov(ecx, Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
-  __ mov(ecx, FieldOperand(ecx, GlobalObject::kNativeContextOffset));
-  __ mov(ebx, Operand(ecx, Context::SlotOffset(map_index)));
-  __ mov(FieldOperand(eax, JSObject::kMapOffset), ebx);
-
-  // Initialize the rest of the function. We don't have to update the
-  // write barrier because the allocated object is in new space.
-  Factory* factory = masm->isolate()->factory();
-  __ mov(ebx, Immediate(factory->empty_fixed_array()));
-  __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ebx);
-  __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx);
-  __ mov(FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset),
-         Immediate(factory->the_hole_value()));
-  __ mov(FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset), edx);
-  __ mov(FieldOperand(eax, JSFunction::kContextOffset), esi);
-  __ mov(FieldOperand(eax, JSFunction::kLiteralsOffset), ebx);
-
-  // Initialize the code pointer in the function to be the one
-  // found in the shared function info object.
-  // But first check if there is an optimized version for our context.
-  Label check_optimized;
-  Label install_unoptimized;
-  if (FLAG_cache_optimized_code) {
-    __ mov(ebx, FieldOperand(edx, SharedFunctionInfo::kOptimizedCodeMapOffset));
-    __ test(ebx, ebx);
-    __ j(not_zero, &check_optimized, Label::kNear);
-  }
-  __ bind(&install_unoptimized);
-  __ mov(FieldOperand(eax, JSFunction::kNextFunctionLinkOffset),
-         Immediate(factory->undefined_value()));
-  __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset));
-  __ lea(edx, FieldOperand(edx, Code::kHeaderSize));
-  __ mov(FieldOperand(eax, JSFunction::kCodeEntryOffset), edx);
-
-  // Return and remove the on-stack parameter.
-  __ ret(1 * kPointerSize);
-
-  __ bind(&check_optimized);
-
-  __ IncrementCounter(counters->fast_new_closure_try_optimized(), 1);
-
-  // ecx holds native context, ebx points to fixed array of 3-element entries
-  // (native context, optimized code, literals).
-  // Map must never be empty, so check the first elements.
-  Label install_optimized;
-  // Speculatively move code object into edx.
-  __ mov(edx, FieldOperand(ebx, SharedFunctionInfo::kFirstCodeSlot));
-  __ cmp(ecx, FieldOperand(ebx, SharedFunctionInfo::kFirstContextSlot));
-  __ j(equal, &install_optimized);
-
-  // Iterate through the rest of map backwards.  edx holds an index as a Smi.
-  Label loop;
-  Label restore;
-  __ mov(edx, FieldOperand(ebx, FixedArray::kLengthOffset));
-  __ bind(&loop);
-  // Do not double check first entry.
-  __ cmp(edx, Immediate(Smi::FromInt(SharedFunctionInfo::kSecondEntryIndex)));
-  __ j(equal, &restore);
-  __ sub(edx, Immediate(Smi::FromInt(SharedFunctionInfo::kEntryLength)));
-  __ cmp(ecx, CodeGenerator::FixedArrayElementOperand(ebx, edx, 0));
-  __ j(not_equal, &loop, Label::kNear);
-  // Hit: fetch the optimized code.
-  __ mov(edx, CodeGenerator::FixedArrayElementOperand(ebx, edx, 1));
-
-  __ bind(&install_optimized);
-  __ IncrementCounter(counters->fast_new_closure_install_optimized(), 1);
-
-  // TODO(fschneider): Idea: store proper code pointers in the optimized code
-  // map and either unmangle them on marking or do nothing as the whole map is
-  // discarded on major GC anyway.
-  __ lea(edx, FieldOperand(edx, Code::kHeaderSize));
-  __ mov(FieldOperand(eax, JSFunction::kCodeEntryOffset), edx);
-
-  // Now link a function into a list of optimized functions.
-  __ mov(edx, ContextOperand(ecx, Context::OPTIMIZED_FUNCTIONS_LIST));
-
-  __ mov(FieldOperand(eax, JSFunction::kNextFunctionLinkOffset), edx);
-  // No need for write barrier as JSFunction (eax) is in the new space.
-
-  __ mov(ContextOperand(ecx, Context::OPTIMIZED_FUNCTIONS_LIST), eax);
-  // Store JSFunction (eax) into edx before issuing write barrier as
-  // it clobbers all the registers passed.
-  __ mov(edx, eax);
-  __ RecordWriteContextSlot(
-      ecx,
-      Context::SlotOffset(Context::OPTIMIZED_FUNCTIONS_LIST),
-      edx,
-      ebx,
-      kDontSaveFPRegs);
-
-  // Return and remove the on-stack parameter.
-  __ ret(1 * kPointerSize);
-
-  __ bind(&restore);
-  // Restore SharedFunctionInfo into edx.
-  __ mov(edx, Operand(esp, 1 * kPointerSize));
-  __ jmp(&install_unoptimized);
-
-  // Create a new closure through the slower runtime call.
-  __ bind(&gc);
-  __ pop(ecx);  // Temporarily remove return address.
-  __ pop(edx);
-  __ push(esi);
-  __ push(edx);
-  __ push(Immediate(factory->false_value()));
-  __ push(ecx);  // Restore return address.
-  __ TailCallRuntime(Runtime::kNewClosure, 3, 1);
-}
-
-
 void FastNewContextStub::Generate(MacroAssembler* masm) {
   // Try to allocate the context in new space.
   Label gc;
   int length = slots_ + Context::MIN_CONTEXT_SLOTS;
   __ Allocate((length * kPointerSize) + FixedArray::kHeaderSize,
               eax, ebx, ecx, &gc, TAG_OBJECT);
 
   // Get the function from the stack.
   __ mov(ecx, Operand(esp, 1 * kPointerSize));
 
@@ skipping 7243 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32