MIPS64: Assembler support for internal references.

src/mips64/assembler-mips64.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 19 matching lines @@
 
 // The original source code covered by the above license above has been
 // modified significantly by Google Inc.
 // Copyright 2012 the V8 project authors. All rights reserved.
 
 
 #ifndef V8_MIPS_ASSEMBLER_MIPS_H_
 #define V8_MIPS_ASSEMBLER_MIPS_H_
 
 #include <stdio.h>
+
+#include <set>
+
 #include "src/assembler.h"
 #include "src/mips64/constants-mips64.h"
 #include "src/serialize.h"
 
 namespace v8 {
 namespace internal {
 
 // CPU Registers.
 //
 // 1) We would prefer to use an enum, but enum values are assignment-
@@ skipping 1002 matching lines @@
   void ClearRecordedAstId() { recorded_ast_id_ = TypeFeedbackId::None(); }
 
   // Record a comment relocation entry that can be used by a disassembler.
   // Use --code-comments to enable.
   void RecordComment(const char* msg);
 
   // Record a deoptimization reason that can be used by a log or cpu profiler.
   // Use --trace-deopt to enable.
   void RecordDeoptReason(const int reason, const int raw_position);
 
-  static int RelocateInternalReference(byte* pc, intptr_t pc_delta);
+  static int RelocateInternalReference(RelocInfo::Mode rmode, byte* pc,
+                                       intptr_t pc_delta);
 
   // Writes a single byte or word of data in the code stream.  Used for
   // inline tables, e.g., jump-tables.
   void db(uint8_t data);
   void dd(uint32_t data);
+  void dd(Label* label);
 
   // Emits the address of the code stub's first instruction.
   void emit_code_stub_address(Code* stub);
 
   PositionsRecorder* positions_recorder() { return &positions_recorder_; }
 
   // Postpone the generation of the trampoline pool for the specified number of
   // instructions.
   void BlockTrampolinePoolFor(int instructions);
 
@@ skipping 78 matching lines @@
 
  protected:
   // Relocation for a type-recording IC has the AST id added to it.  This
   // member variable is a way to pass the information from the call site to
   // the relocation info.
   TypeFeedbackId recorded_ast_id_;
 
   int64_t buffer_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Decode branch instruction at pos and return branch target pos.
-  int64_t target_at(int64_t pos);
+  int64_t target_at(int64_t pos, bool is_internal);
 
   // Patch branch instruction at pos to branch to given branch target pos.
-  void target_at_put(int64_t pos, int64_t target_pos);
+  void target_at_put(int64_t pos, int64_t target_pos, bool is_internal);
 
   // Say if we need to relocate with this mode.
   bool MustUseReg(RelocInfo::Mode rmode);
 
   // Record reloc info for current pc_.
   void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0);
 
   // Block the emission of the trampoline pool before pc_offset.
   void BlockTrampolinePoolBefore(int pc_offset) {
     if (no_trampoline_pool_before_ < pc_offset)
@@ skipping 149 matching lines @@
 
   void GenInstrJump(Opcode opcode,
                      uint32_t address);
 
   // Helpers.
   void LoadRegPlusOffsetToAt(const MemOperand& src);
 
   // Labels.
   void print(Label* L);
   void bind_to(Label* L, int pos);
-  void next(Label* L);
+  void next(Label* L, bool is_internal);
 
   // One trampoline consists of:
   // - space for trampoline slots,
   // - space for labels.
   //
   // Space for trampoline slots is equal to slot_count * 2 * kInstrSize.
   // Space for trampoline slots preceeds space for labels. Each label is of one
   // instruction size, so total amount for labels is equal to
   // label_count *  kInstrSize.
   class Trampoline {
@@ skipping 44 matching lines @@
   // If trampoline is emitted, generated code is becoming large. As this is
   // already a slow case which can possibly break our code generation for the
   // extreme case, we use this information to trigger different mode of
   // branch instruction generation, where we use jump instructions rather
   // than regular branch instructions.
   bool trampoline_emitted_;
   static const int kTrampolineSlotsSize = 6 * kInstrSize;
   static const int kMaxBranchOffset = (1 << (18 - 1)) - 1;
   static const int kInvalidSlotPos = -1;
 
+  // Internal reference positions, required for unbounded internal reference
+  // labels.
+  std::set<int64_t> internal_reference_positions_;
+
   Trampoline trampoline_;
   bool internal_trampoline_exception_;
 
   friend class RegExpMacroAssemblerMIPS;
   friend class RelocInfo;
   friend class CodePatcher;
   friend class BlockTrampolinePoolScope;
 
   PositionsRecorder positions_recorder_;
   friend class PositionsRecorder;
   friend class EnsureSpace;
 };
 
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_MIPS_H_