A64: add missing files.

src/a64/lithium-codegen-a64.h

Index: src/a64/lithium-codegen-a64.h
diff --git a/src/arm/lithium-codegen-arm.h b/src/a64/lithium-codegen-a64.h
similarity index 68%
copy from src/arm/lithium-codegen-arm.h
copy to src/a64/lithium-codegen-a64.h
index cecf152eed1aaa8bab1447e746e52f5a2ed336cd..15eaf2c4e816fd8fa9542f89ffe6bef47f9f09fa 100644
--- a/src/arm/lithium-codegen-arm.h
+++ b/src/a64/lithium-codegen-a64.h
@@ -1,4 +1,4 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
+// Copyright 2013 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:
@@ -25,12 +25,12 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_ARM_LITHIUM_CODEGEN_ARM_H_
-#define V8_ARM_LITHIUM_CODEGEN_ARM_H_
+#ifndef V8_A64_LITHIUM_CODEGEN_A64_H_
+#define V8_A64_LITHIUM_CODEGEN_A64_H_
 
-#include "arm/lithium-arm.h"
+#include "a64/lithium-a64.h"
 
-#include "arm/lithium-gap-resolver-arm.h"
+#include "a64/lithium-gap-resolver-a64.h"
 #include "deoptimizer.h"
 #include "safepoint-table.h"
 #include "scopes.h"
@@ -42,6 +42,7 @@ namespace internal {
 // Forward declarations.
 class LDeferredCode;
 class SafepointGenerator;
+class BranchGenerator;
 
 class LCodeGen BASE_EMBEDDED {
  public:
@@ -70,14 +71,16 @@ class LCodeGen BASE_EMBEDDED {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
-
   // Simple accessors.
   MacroAssembler* masm() const { return masm_; }
   CompilationInfo* info() const { return info_; }
+  Zone* zone() const { return zone_; }
+  HGraph* graph() const { return chunk()->graph(); }
+  LPlatformChunk* chunk() const { return chunk_; }
   Isolate* isolate() const { return info_->isolate(); }
   Factory* factory() const { return isolate()->factory(); }
+  Scope* scope() const { return scope_; }
   Heap* heap() const { return isolate()->heap(); }
-  Zone* zone() const { return zone_; }
 
   // TODO(svenpanne) Use this consistently.
   int LookupDestination(int block_id) const {
@@ -102,32 +105,6 @@ class LCodeGen BASE_EMBEDDED {
     return frame_is_built_ ? kLRHasBeenSaved : kLRHasNotBeenSaved;
   }
 
-  // Support for converting LOperands to assembler types.
-  // LOperand must be a register.
-  Register ToRegister(LOperand* op) const;
-
-  // LOperand is loaded into scratch, unless already a register.
-  Register EmitLoadRegister(LOperand* op, Register scratch);
-
-  // LOperand must be a double register.
-  DwVfpRegister ToDoubleRegister(LOperand* op) const;
-
-  // LOperand is loaded into dbl_scratch, unless already a double register.
-  DwVfpRegister EmitLoadDoubleRegister(LOperand* op,
-                                       SwVfpRegister flt_scratch,
-                                       DwVfpRegister dbl_scratch);
-  int ToInteger32(LConstantOperand* op) const;
-  Smi* ToSmi(LConstantOperand* op) const;
-  double ToDouble(LConstantOperand* op) const;
-  Operand ToOperand(LOperand* op);
-  MemOperand ToMemOperand(LOperand* op) const;
-  // Returns a MemOperand pointing to the high word of a DoubleStackSlot.
-  MemOperand ToHighMemOperand(LOperand* op) const;
-
-  bool IsInteger32(LConstantOperand* op) const;
-  bool IsSmi(LConstantOperand* op) const;
-  Handle<Object> ToHandle(LConstantOperand* op) const;
-
   // Try to generate code for the entire chunk, but it may fail if the
   // chunk contains constructs we cannot handle. Returns true if the
   // code generation attempt succeeded.
@@ -137,44 +114,24 @@ class LCodeGen BASE_EMBEDDED {
   // information on it.
   void FinishCode(Handle<Code> code);
 
-  // Deferred code support.
-  void DoDeferredNumberTagD(LNumberTagD* instr);
-
-  enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 };
-  void DoDeferredNumberTagI(LInstruction* instr,
-                            LOperand* value,
-                            IntegerSignedness signedness);
-
-  void DoDeferredTaggedToI(LTaggedToI* instr);
-  void DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr);
-  void DoDeferredStackCheck(LStackCheck* instr);
-  void DoDeferredRandom(LRandom* instr);
-  void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr);
-  void DoDeferredStringCharFromCode(LStringCharFromCode* instr);
-  void DoDeferredAllocate(LAllocate* instr);
-  void DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
-                                       Label* map_check);
-
-  void DoCheckMapCommon(Register map_reg, Handle<Map> map, LEnvironment* env);
-
-  // Parallel move support.
-  void DoParallelMove(LParallelMove* move);
-  void DoGap(LGap* instr);
+  // Support for converting LOperands to assembler types.
+  // LOperand must be a register.
+  Register ToRegister(LOperand* op) const;
+  Register ToRegister32(LOperand* op) const;
+  Operand ToOperand(LOperand* op);
+  Operand ToOperand32(LOperand* op);
+  MemOperand ToMemOperand(LOperand* op) const;
+  Handle<Object> ToHandle(LConstantOperand* op) const;
 
-  MemOperand PrepareKeyedOperand(Register key,
-                                 Register base,
-                                 bool key_is_constant,
-                                 int constant_key,
-                                 int element_size,
-                                 int shift_size,
-                                 int additional_index,
-                                 int additional_offset);
+  // TODO(jbramley): Examine these helpers and check that they make sense.
+  // IsInteger32Constant returns true for smi constants, for example.
+  bool IsInteger32Constant(LConstantOperand* op) const;
+  bool IsSmi(LConstantOperand* op) const;
 
-  // Emit frame translation commands for an environment.
-  void WriteTranslation(LEnvironment* environment,
-                        Translation* translation,
-                        int* arguments_index,
-                        int* arguments_count);
+  int ToInteger32(LConstantOperand* op) const;
+  Smi* ToSmi(LConstantOperand* op) const;
+  double ToDouble(LConstantOperand* op) const;
+  DoubleRegister ToDoubleRegister(LOperand* op) const;
 
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
@@ -194,26 +151,121 @@ class LCodeGen BASE_EMBEDDED {
   bool is_done() const { return status_ == DONE; }
   bool is_aborted() const { return status_ == ABORTED; }
 
-  StrictModeFlag strict_mode_flag() const {
-    return info()->is_classic_mode() ? kNonStrictMode : kStrictMode;
-  }
+  // Return a double scratch register which can be used locally
+  // when generating code for a lithium instruction.
+  DoubleRegister double_scratch() { return crankshaft_fp_scratch; }
 
-  LPlatformChunk* chunk() const { return chunk_; }
-  Scope* scope() const { return scope_; }
-  HGraph* graph() const { return chunk()->graph(); }
+  // Deferred code support.
+  void DoDeferredNumberTagD(LNumberTagD* instr);
+  void DoDeferredStackCheck(LStackCheck* instr);
+  void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr);
+  void DoDeferredStringCharFromCode(LStringCharFromCode* instr);
+  void DoDeferredMathAbsTagged(LMathAbsTagged* instr,
+                               Label* exit,
+                               Label* allocation_entry);
 
-  Register scratch0() { return r9; }
-  DwVfpRegister double_scratch0() { return kScratchDoubleReg; }
+  enum IntegerSignedness { SIGNED_INT32, UNSIGNED_INT32 };
+  void DoDeferredNumberTagI(LInstruction* instr,
+                            LOperand* value,
+                            LOperand* temp1,
+                            LOperand* temp2,
+                            IntegerSignedness signedness);
+  void DoDeferredTaggedToI(LTaggedToI* instr,
+                           LOperand* value,
+                           LOperand* temp1,
+                           LOperand* temp2);
+  void DoDeferredAllocate(LAllocate* instr);
 
+  void DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
+                                       Label* map_check);
+
+  static Condition TokenToCondition(Token::Value op, bool is_unsigned);
+  void EmitGoto(int block);
   int GetNextEmittedBlock() const;
-  LInstruction* GetNextInstruction();
+  void DoGap(LGap* instr);
+
+  // Generic version of EmitBranch. It contains some code to avoid emitting a
+  // branch on the next emitted basic block where we could just fall-through.
+  // You shouldn't use that directly but rather consider one of the helper like
+  // LCodeGen::EmitBranch, LCodeGen::EmitCompareAndBranch...
+  template<class InstrType>
+  void EmitBranchGeneric(InstrType instr,
+                         const BranchGenerator& branch);
+
+  template<class InstrType>
+  void EmitBranch(InstrType instr, Condition condition);
+
+  template<class InstrType>
+  void EmitCompareAndBranch(InstrType instr,
+                            Condition condition,
+                            const Register& lhs,
+                            const Operand& rhs);
+
+  template<class InstrType>
+  void EmitTestAndBranch(InstrType instr,
+                         Condition condition,
+                         const Register& value,
+                         uint64_t mask);
+
+  // Emits optimized code to deep-copy the contents of statically known object
+  // graphs (e.g. object literal boilerplate). Expects a pointer to the
+  // allocated destination object in the result register, and a pointer to the
+  // source object in the source register.
+  void EmitDeepCopy(Handle<JSObject> object,
+                    Register result,
+                    Register source,
+                    Register scratch,
+                    int* offset,
+                    AllocationSiteMode mode);
+
+  // Emits optimized code for %_IsString(x).  Preserves input register.
+  // Returns the condition on which a final split to
+  // true and false label should be made, to optimize fallthrough.
+  Condition EmitIsString(Register input, Register temp1, Label* is_not_string);
 
-  void EmitClassOfTest(Label* if_true,
-                       Label* if_false,
-                       Handle<String> class_name,
-                       Register input,
-                       Register temporary,
-                       Register temporary2);
+  void EmitLoadFieldOrConstantFunction(Register result,
+                                       Register object,
+                                       Handle<Map> type,
+                                       Handle<String> name,
+                                       LEnvironment* env);
+
+  void RegisterDependentCodeForEmbeddedMaps(Handle<Code> code);
+  int DefineDeoptimizationLiteral(Handle<Object> literal);
+  void PopulateDeoptimizationData(Handle<Code> code);
+  void PopulateDeoptimizationLiteralsWithInlinedFunctions();
+
+  void Deoptimize(LEnvironment* environment);
+  void Deoptimize(LEnvironment* environment,
+                  Deoptimizer::BailoutType bailout_type);
+  void SoftDeoptimize(LEnvironment* environment);
+  void DeoptimizeIf(Condition cc, LEnvironment* environment);
+  void DeoptimizeIfZero(Register rt, LEnvironment* environment);
+  void DeoptimizeIfNegative(Register rt, LEnvironment* environment);
+  void DeoptimizeIfSmi(Register rt, LEnvironment* environment);
+  void DeoptimizeIfNotSmi(Register rt, LEnvironment* environment);
+  void DeoptimizeIfRoot(Register rt,
+                        Heap::RootListIndex index,
+                        LEnvironment* environment);
+  void DeoptimizeIfNotRoot(Register rt,
+                           Heap::RootListIndex index,
+                           LEnvironment* environment);
+
+  MemOperand PrepareKeyedExternalArrayOperand(Register key,
+                                              Register base,
+                                              Register scratch,
+                                              bool key_is_smi,
+                                              bool key_is_constant,
+                                              int constant_key,
+                                              int element_size_shift,
+                                              int additional_index);
+  void CalcKeyedArrayBaseRegister(Register base,
+                                  Register elements,
+                                  Register key,
+                                  bool key_is_tagged,
+                                  ElementsKind elements_kind);
+
+  void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
+                                            Safepoint::DeoptMode mode);
 
   int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
 
@@ -222,8 +274,21 @@ class LCodeGen BASE_EMBEDDED {
 
   void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }
 
-  // Code generation passes.  Returns true if code generation should
-  // continue.
+  // Emit frame translation commands for an environment.
+  void WriteTranslation(LEnvironment* environment,
+                        Translation* translation,
+                        int* arguments_index,
+                        int* arguments_count);
+
+  void AddToTranslation(Translation* translation,
+                        LOperand* op,
+                        bool is_tagged,
+                        bool is_uint32,
+                        bool arguments_known,
+                        int arguments_index,
+                        int arguments_count);
+
+  // Code generation steps.  Returns true if code generation should continue.
   bool GeneratePrologue();
   bool GenerateBody();
   bool GenerateDeferredCode();
@@ -235,18 +300,14 @@ class LCodeGen BASE_EMBEDDED {
     RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS
   };
 
-  void CallCode(
-      Handle<Code> code,
-      RelocInfo::Mode mode,
-      LInstruction* instr,
-      TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS);
+  void CallCode(Handle<Code> code,
+                RelocInfo::Mode mode,
+                LInstruction* instr);
 
-  void CallCodeGeneric(
-      Handle<Code> code,
-      RelocInfo::Mode mode,
-      LInstruction* instr,
-      SafepointMode safepoint_mode,
-      TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS);
+  void CallCodeGeneric(Handle<Code> code,
+                       RelocInfo::Mode mode,
+                       LInstruction* instr,
+                       SafepointMode safepoint_mode);
 
   void CallRuntime(const Runtime::Function* function,
                    int num_arguments,
@@ -263,52 +324,19 @@ class LCodeGen BASE_EMBEDDED {
                                int argc,
                                LInstruction* instr);
 
-  enum R1State {
-    R1_UNINITIALIZED,
-    R1_CONTAINS_TARGET
-  };
-
-  // Generate a direct call to a known function.  Expects the function
-  // to be in r1.
+  // Generate a direct call to a known function.
+  // If the function is already loaded into x1 by the caller, function_reg may
+  // be set to x1. Otherwise, it must be NoReg, and CallKnownFunction will
+  // automatically load it.
   void CallKnownFunction(Handle<JSFunction> function,
                          int formal_parameter_count,
                          int arity,
                          LInstruction* instr,
                          CallKind call_kind,
-                         R1State r1_state);
-
-  void LoadHeapObject(Register result, Handle<HeapObject> object);
-
-  void RecordSafepointWithLazyDeopt(LInstruction* instr,
-                                    SafepointMode safepoint_mode);
-
-  void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
-                                            Safepoint::DeoptMode mode);
-  void DeoptimizeIf(Condition cc,
-                    LEnvironment* environment,
-                    Deoptimizer::BailoutType bailout_type);
-  void DeoptimizeIf(Condition cc, LEnvironment* environment);
-  void SoftDeoptimize(LEnvironment* environment);
-
-  void AddToTranslation(Translation* translation,
-                        LOperand* op,
-                        bool is_tagged,
-                        bool is_uint32,
-                        bool arguments_known,
-                        int arguments_index,
-                        int arguments_count);
-  void RegisterDependentCodeForEmbeddedMaps(Handle<Code> code);
-  void PopulateDeoptimizationData(Handle<Code> code);
-  int DefineDeoptimizationLiteral(Handle<Object> literal);
-
-  void PopulateDeoptimizationLiteralsWithInlinedFunctions();
-
-  Register ToRegister(int index) const;
-  DwVfpRegister ToDoubleRegister(int index) const;
-
-  void EmitIntegerMathAbs(LMathAbs* instr);
+                         Register function_reg = NoReg);
 
   // Support for recording safepoint and position information.
+  void RecordPosition(int position);
   void RecordSafepoint(LPointerMap* pointers,
                        Safepoint::Kind kind,
                        int arguments,
@@ -318,80 +346,10 @@ class LCodeGen BASE_EMBEDDED {
   void RecordSafepointWithRegisters(LPointerMap* pointers,
                                     int arguments,
                                     Safepoint::DeoptMode mode);
-  void RecordSafepointWithRegistersAndDoubles(LPointerMap* pointers,
-                                              int arguments,
-                                              Safepoint::DeoptMode mode);
-  void RecordPosition(int position);
-
-  static Condition TokenToCondition(Token::Value op, bool is_unsigned);
-  void EmitGoto(int block);
-  void EmitBranch(int left_block, int right_block, Condition cc);
-  void EmitNumberUntagD(Register input,
-                        DwVfpRegister result,
-                        bool allow_undefined_as_nan,
-                        bool deoptimize_on_minus_zero,
-                        LEnvironment* env,
-                        NumberUntagDMode mode);
-
-  // Emits optimized code for typeof x == "y".  Modifies input register.
-  // Returns the condition on which a final split to
-  // true and false label should be made, to optimize fallthrough.
-  Condition EmitTypeofIs(Label* true_label,
-                         Label* false_label,
-                         Register input,
-                         Handle<String> type_name);
-
-  // Emits optimized code for %_IsObject(x).  Preserves input register.
-  // Returns the condition on which a final split to
-  // true and false label should be made, to optimize fallthrough.
-  Condition EmitIsObject(Register input,
-                         Register temp1,
-                         Label* is_not_object,
-                         Label* is_object);
-
-  // Emits optimized code for %_IsString(x).  Preserves input register.
-  // Returns the condition on which a final split to
-  // true and false label should be made, to optimize fallthrough.
-  Condition EmitIsString(Register input,
-                         Register temp1,
-                         Label* is_not_string);
-
-  // Emits optimized code for %_IsConstructCall().
-  // Caller should branch on equal condition.
-  void EmitIsConstructCall(Register temp1, Register temp2);
-
-  void EmitLoadFieldOrConstantFunction(Register result,
-                                       Register object,
-                                       Handle<Map> type,
-                                       Handle<String> name,
-                                       LEnvironment* env);
-
-  // Emits optimized code to deep-copy the contents of statically known
-  // object graphs (e.g. object literal boilerplate).
-  void EmitDeepCopy(Handle<JSObject> object,
-                    Register result,
-                    Register source,
-                    int* offset,
-                    AllocationSiteMode mode);
-
-  // Emit optimized code for integer division.
-  // Inputs are signed.
-  // All registers are clobbered.
-  // If 'remainder' is no_reg, it is not computed.
-  void EmitSignedIntegerDivisionByConstant(Register result,
-                                           Register dividend,
-                                           int32_t divisor,
-                                           Register remainder,
-                                           Register scratch,
-                                           LEnvironment* environment);
+  void RecordSafepointWithLazyDeopt(LInstruction* instr,
+                                    SafepointMode safepoint_mode);
 
   void EnsureSpaceForLazyDeopt();
-  void DoLoadKeyedExternalArray(LLoadKeyed* instr);
-  void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
-  void DoLoadKeyedFixedArray(LLoadKeyed* instr);
-  void DoStoreKeyedExternalArray(LStoreKeyed* instr);
-  void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
-  void DoStoreKeyedFixedArray(LStoreKeyed* instr);
 
   Zone* zone_;
   LPlatformChunk* const chunk_;
@@ -413,8 +371,8 @@ class LCodeGen BASE_EMBEDDED {
   int last_lazy_deopt_pc_;
   bool frame_is_built_;
 
-  // Builder that keeps track of safepoints in the code. The table
-  // itself is emitted at the end of the generated code.
+  // Builder that keeps track of safepoints in the code. The table itself is
+  // emitted at the end of the generated code.
   SafepointTableBuilder safepoints_;
 
   // Compiler from a set of parallel moves to a sequential list of moves.
@@ -436,7 +394,7 @@ class LCodeGen BASE_EMBEDDED {
           codegen_->masm_->PushSafepointRegisters();
           break;
         case Safepoint::kWithRegistersAndDoubles:
-          codegen_->masm_->PushSafepointRegistersAndDoubles();
+          UNIMPLEMENTED();
           break;
         default:
           UNREACHABLE();
@@ -451,7 +409,7 @@ class LCodeGen BASE_EMBEDDED {
           codegen_->masm_->PopSafepointRegisters();
           break;
         case Safepoint::kWithRegistersAndDoubles:
-          codegen_->masm_->PopSafepointRegistersAndDoubles();
+          UNIMPLEMENTED();
           break;
         default:
           UNREACHABLE();
@@ -464,7 +422,6 @@ class LCodeGen BASE_EMBEDDED {
   };
 
   friend class LDeferredCode;
-  friend class LEnvironment;
   friend class SafepointGenerator;
   DISALLOW_COPY_AND_ASSIGN(LCodeGen);
 };
@@ -485,7 +442,7 @@ class LDeferredCode: public ZoneObject {
 
   void SetExit(Label* exit) { external_exit_ = exit; }
   Label* entry() { return &entry_; }
-  Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; }
+  Label* exit() { return (external_exit_ != NULL) ? external_exit_ : &exit_; }
   int instruction_index() const { return instruction_index_; }
 
  protected:
@@ -500,6 +457,30 @@ class LDeferredCode: public ZoneObject {
   int instruction_index_;
 };
 
+
+// This is the abstract class used by EmitBranchGeneric.
+// It is used to emit code for conditional branching. The Emit() function
+// emits code to branch when the condition holds and EmitInverted() emits
+// the branch when the inverted condition is verified.
+//
+// For actual examples of condition see the concrete implementation in
+// lithium-codegen-a64.cc (e.g. BranchOnCondition, CompareAndBranch).
+class BranchGenerator BASE_EMBEDDED {
+ public:
+  explicit BranchGenerator(LCodeGen* codegen)
+    : codegen_(codegen) { }
+
+  virtual ~BranchGenerator() { }
+
+  virtual void Emit(Label* label) const = 0;
+  virtual void EmitInverted(Label* label) const = 0;
+
+ protected:
+  MacroAssembler* masm() const { return codegen_->masm(); }
+
+  LCodeGen* codegen_;
+};
+
 } }  // namespace v8::internal
 
-#endif  // V8_ARM_LITHIUM_CODEGEN_ARM_H_
+#endif  // V8_A64_LITHIUM_CODEGEN_A64_H_