Merge 6168:6800 from bleeding_edge to experimental/gc branch.

src/code-stubs.h

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011 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
 //       with the distribution.
@@ skipping 15 matching lines @@
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "globals.h"
 
 namespace v8 {
 namespace internal {
 
 // List of code stubs used on all platforms. The order in this list is important
-// as only the stubs up to and including RecordWrite allows nested stub calls.
+// as only the stubs up to and including Instanceof allows nested stub calls.
 #define CODE_STUB_LIST_ALL_PLATFORMS(V)  \
   V(CallFunction)                        \
   V(GenericBinaryOp)                     \
   V(TypeRecordingBinaryOp)               \
   V(StringAdd)                           \
   V(StringCharAt)                        \
   V(SubString)                           \
   V(StringCompare)                       \
   V(SmiOp)                               \
   V(Compare)                             \
   V(CompareIC)                           \
   V(MathPow)                             \
   V(StoreBufferOverflow)                 \
   V(TranscendentalCache)                 \
-  V(RecordWrite)                         \
+  V(Instanceof)                          \
   V(ConvertToDouble)                     \
   V(WriteInt32ToHeapNumber)              \
   V(IntegerMod)                          \
   V(StackCheck)                          \
   V(FastNewClosure)                      \
   V(FastNewContext)                      \
   V(FastCloneShallowArray)               \
   V(GenericUnaryOp)                      \
   V(RevertToNumber)                      \
   V(ToBoolean)                           \
-  V(Instanceof)                          \
+  V(ToNumber)                            \
   V(CounterOp)                           \
   V(ArgumentsAccess)                     \
   V(RegExpExec)                          \
   V(RegExpConstructResult)               \
   V(NumberToString)                      \
   V(CEntry)                              \
   V(JSEntry)                             \
   V(DebuggerStatement)
 
 // List of code stubs only used on ARM platforms.
 #ifdef V8_TARGET_ARCH_ARM
 #define CODE_STUB_LIST_ARM(V)  \
   V(GetProperty)               \
   V(SetProperty)               \
   V(InvokeBuiltin)             \
-  V(RegExpCEntry)
+  V(RegExpCEntry)              \
+  V(DirectCEntry)
 #else
 #define CODE_STUB_LIST_ARM(V)
 #endif
 
 // Combined list of code stubs.
 #define CODE_STUB_LIST(V)            \
   CODE_STUB_LIST_ALL_PLATFORMS(V)    \
   CODE_STUB_LIST_ARM(V)
 
-// Types of uncatchable exceptions.
-enum UncatchableExceptionType { OUT_OF_MEMORY, TERMINATION };
-
 // Mode to overwrite BinaryExpression values.
 enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT };
 enum UnaryOverwriteMode { UNARY_OVERWRITE, UNARY_NO_OVERWRITE };
 
 
 // Stub is base classes of all stubs.
 class CodeStub BASE_EMBEDDED {
  public:
   enum Major {
 #define DEF_ENUM(name) name,
@@ skipping 72 matching lines @@
   virtual void Print() { PrintF("%s\n", GetName()); }
 #endif
 
   // Computes the key based on major and minor.
   uint32_t GetKey() {
     ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
     return MinorKeyBits::encode(MinorKey()) |
            MajorKeyBits::encode(MajorKey());
   }
 
-  bool AllowsStubCalls() { return MajorKey() <= RecordWrite; }
+  bool AllowsStubCalls() { return MajorKey() <= Instanceof; }
 
   class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {};
   class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {};
 
   friend class BreakPointIterator;
 };
 
 
 // Helper interface to prepare to/restore after making runtime calls.
 class RuntimeCallHelper {
@@ skipping 60 matching lines @@
 
  private:
 
   const char* GetName() { return "StackCheckStub"; }
 
   Major MajorKey() { return StackCheck; }
   int MinorKey() { return 0; }
 };
 
 
+class ToNumberStub: public CodeStub {
+ public:
+  ToNumberStub() { }
+
+  void Generate(MacroAssembler* masm);
+
+ private:
+  Major MajorKey() { return ToNumber; }
+  int MinorKey() { return 0; }
+  const char* GetName() { return "ToNumberStub"; }
+};
+
+
 class FastNewClosureStub : public CodeStub {
  public:
   void Generate(MacroAssembler* masm);
 
  private:
   const char* GetName() { return "FastNewClosureStub"; }
   Major MajorKey() { return FastNewClosure; }
   int MinorKey() { return 0; }
 };
 
@@ skipping 46 matching lines @@
     ASSERT(mode_ == 0 || mode_ == 1);
     return (length_ << 1) | mode_;
   }
 };
 
 
 class InstanceofStub: public CodeStub {
  public:
   enum Flags {
     kNoFlags = 0,
-    kArgsInRegisters = 1 << 0
+    kArgsInRegisters = 1 << 0,
+    kCallSiteInlineCheck = 1 << 1,
+    kReturnTrueFalseObject = 1 << 2
   };
 
-  explicit InstanceofStub(Flags flags) : flags_(flags) { }
+  explicit InstanceofStub(Flags flags) : flags_(flags), name_(NULL) { }
+
+  static Register left();
+  static Register right();
 
   void Generate(MacroAssembler* masm);
 
  private:
   Major MajorKey() { return Instanceof; }
-  int MinorKey() { return args_in_registers() ? 1 : 0; }
+  int MinorKey() { return static_cast<int>(flags_); }
 
-  bool args_in_registers() {
+  bool HasArgsInRegisters() const {
     return (flags_ & kArgsInRegisters) != 0;
   }
 
+  bool HasCallSiteInlineCheck() const {
+    return (flags_ & kCallSiteInlineCheck) != 0;
+  }
+
+  bool ReturnTrueFalseObject() const {
+    return (flags_ & kReturnTrueFalseObject) != 0;
+  }
+
+  const char* GetName();
+
   Flags flags_;
+  char* name_;
 };
 
 
 enum NegativeZeroHandling {
   kStrictNegativeZero,
   kIgnoreNegativeZero
 };
 
 
 enum UnaryOpFlags {
@@ skipping 221 matching lines @@
       : result_size_(result_size), save_doubles_(save_doubles) { }
 
   void Generate(MacroAssembler* masm);
 
  private:
   void GenerateCore(MacroAssembler* masm,
                     Label* throw_normal_exception,
                     Label* throw_termination_exception,
                     Label* throw_out_of_memory_exception,
                     bool do_gc,
-                    bool always_allocate_scope,
-                    int alignment_skew = 0);
+                    bool always_allocate_scope);
   void GenerateThrowTOS(MacroAssembler* masm);
   void GenerateThrowUncatchable(MacroAssembler* masm,
                                 UncatchableExceptionType type);
 
   // Number of pointers/values returned.
   const int result_size_;
   SaveFPRegsMode save_doubles_;
 
   Major MajorKey() { return CEntry; }
   int MinorKey();
@@ skipping 101 matching lines @@
 };
 
 
 class CallFunctionStub: public CodeStub {
  public:
   CallFunctionStub(int argc, InLoopFlag in_loop, CallFunctionFlags flags)
       : argc_(argc), in_loop_(in_loop), flags_(flags) { }
 
   void Generate(MacroAssembler* masm);
 
+  static int ExtractArgcFromMinorKey(int minor_key) {
+    return ArgcBits::decode(minor_key);
+  }
+
  private:
   int argc_;
   InLoopFlag in_loop_;
   CallFunctionFlags flags_;
 
 #ifdef DEBUG
   void Print() {
     PrintF("CallFunctionStub (args %d, in_loop %d, flags %d)\n",
            argc_,
            static_cast<int>(in_loop_),
@@ skipping 11 matching lines @@
     // Encode the parameters in a unique 32 bit value.
     return InLoopBits::encode(in_loop_)
            | FlagBits::encode(flags_)
            | ArgcBits::encode(argc_);
   }
 
   InLoopFlag InLoop() { return in_loop_; }
   bool ReceiverMightBeValue() {
     return (flags_ & RECEIVER_MIGHT_BE_VALUE) != 0;
   }
-
- public:
-  static int ExtractArgcFromMinorKey(int minor_key) {
-    return ArgcBits::decode(minor_key);
-  }
 };
 
 
 enum StringIndexFlags {
   // Accepts smis or heap numbers.
   STRING_INDEX_IS_NUMBER,
 
   // Accepts smis or heap numbers that are valid array indices
   // (ECMA-262 15.4). Invalid indices are reported as being out of
   // range.
@@ skipping 139 matching lines @@
   void GenerateSlow(MacroAssembler* masm,
                     const RuntimeCallHelper& call_helper);
 
  private:
   StringCharCodeAtGenerator char_code_at_generator_;
   StringCharFromCodeGenerator char_from_code_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator);
 };
 
+
+class AllowStubCallsScope {
+ public:
+  AllowStubCallsScope(MacroAssembler* masm, bool allow)
+       : masm_(masm), previous_allow_(masm->allow_stub_calls()) {
+    masm_->set_allow_stub_calls(allow);
+  }
+  ~AllowStubCallsScope() {
+    masm_->set_allow_stub_calls(previous_allow_);
+  }
+
+ private:
+  MacroAssembler* masm_;
+  bool previous_allow_;
+
+  DISALLOW_COPY_AND_ASSIGN(AllowStubCallsScope);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_