Add m-esr52 at 52.6.0

1 files changed, 226 insertions, 0 deletions

diff --git a/js/src/irregexp/NativeRegExpMacroAssembler.h b/js/src/irregexp/NativeRegExpMacroAssembler.h
new file mode 100644
index 000000000..7a72e252f
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+++ b/js/src/irregexp/NativeRegExpMacroAssembler.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99: */
+
+// 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (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_NATIVE_REGEXP_MACRO_ASSEMBLER_H_
+#define V8_NATIVE_REGEXP_MACRO_ASSEMBLER_H_
+
+#include "irregexp/RegExpMacroAssembler.h"
+
+namespace js {
+namespace irregexp {
+
+struct InputOutputData
+{
+    const void* inputStart;
+    const void* inputEnd;
+
+    // Index into inputStart (in chars) at which to begin matching.
+    size_t startIndex;
+    size_t* endIndex;
+
+    MatchPairs* matches;
+
+    // RegExpMacroAssembler::Result for non-global regexps, number of captures
+    // for global regexps.
+    int32_t result;
+
+    template <typename CharT>
+    InputOutputData(const CharT* inputStart, const CharT* inputEnd,
+                    size_t startIndex, MatchPairs* matches, size_t* endIndex)
+      : inputStart(inputStart),
+        inputEnd(inputEnd),
+        startIndex(startIndex),
+        endIndex(endIndex),
+        matches(matches),
+        result(0)
+    {}
+};
+
+struct FrameData
+{
+    // Copy of the input/output data's data.
+    char16_t* inputStart;
+    size_t startIndex;
+    size_t* endIndex;
+
+    // Pointer to the character before the input start.
+    char16_t* inputStartMinusOne;
+
+    // Copy of the input MatchPairs registers, may be modified by JIT code.
+    int32_t* outputRegisters;
+    int32_t numOutputRegisters;
+
+    int32_t successfulCaptures;
+
+    void* backtrackStackBase;
+};
+
+class MOZ_STACK_CLASS NativeRegExpMacroAssembler final : public RegExpMacroAssembler
+{
+  public:
+    // Type of input string to generate code for.
+    enum Mode { ASCII = 1, CHAR16 = 2 };
+
+    NativeRegExpMacroAssembler(LifoAlloc* alloc, RegExpShared* shared,
+                               JSRuntime* rt, Mode mode, int registers_to_save);
+
+    // Inherited virtual methods.
+    RegExpCode GenerateCode(JSContext* cx, bool match_only);
+    int stack_limit_slack();
+    bool CanReadUnaligned();
+    void AdvanceCurrentPosition(int by);
+    void AdvanceRegister(int reg, int by);
+    void Backtrack();
+    void Bind(jit::Label* label);
+    void CheckAtStart(jit::Label* on_at_start);
+    void CheckCharacter(unsigned c, jit::Label* on_equal);
+    void CheckCharacterAfterAnd(unsigned c, unsigned and_with, jit::Label* on_equal);
+    void CheckCharacterGT(char16_t limit, jit::Label* on_greater);
+    void CheckCharacterLT(char16_t limit, jit::Label* on_less);
+    void CheckGreedyLoop(jit::Label* on_tos_equals_current_position);
+    void CheckNotAtStart(jit::Label* on_not_at_start);
+    void CheckNotBackReference(int start_reg, jit::Label* on_no_match);
+    void CheckNotBackReferenceIgnoreCase(int start_reg, jit::Label* on_no_match, bool unicode);
+    void CheckNotCharacter(unsigned c, jit::Label* on_not_equal);
+    void CheckNotCharacterAfterAnd(unsigned c, unsigned and_with, jit::Label* on_not_equal);
+    void CheckNotCharacterAfterMinusAnd(char16_t c, char16_t minus, char16_t and_with,
+                                        jit::Label* on_not_equal);
+    void CheckCharacterInRange(char16_t from, char16_t to,
+                               jit::Label* on_in_range);
+    void CheckCharacterNotInRange(char16_t from, char16_t to,
+                                  jit::Label* on_not_in_range);
+    void CheckBitInTable(uint8_t* table, jit::Label* on_bit_set);
+    void CheckPosition(int cp_offset, jit::Label* on_outside_input);
+    void JumpOrBacktrack(jit::Label* to);
+    bool CheckSpecialCharacterClass(char16_t type, jit::Label* on_no_match);
+    void Fail();
+    void IfRegisterGE(int reg, int comparand, jit::Label* if_ge);
+    void IfRegisterLT(int reg, int comparand, jit::Label* if_lt);
+    void IfRegisterEqPos(int reg, jit::Label* if_eq);
+    void LoadCurrentCharacter(int cp_offset, jit::Label* on_end_of_input,
+                              bool check_bounds = true, int characters = 1);
+    void PopCurrentPosition();
+    void PopRegister(int register_index);
+    void PushCurrentPosition();
+    void PushRegister(int register_index, StackCheckFlag check_stack_limit);
+    void ReadCurrentPositionFromRegister(int reg);
+    void ReadBacktrackStackPointerFromRegister(int reg);
+    void SetCurrentPositionFromEnd(int by);
+    void SetRegister(int register_index, int to);
+    bool Succeed();
+    void WriteCurrentPositionToRegister(int reg, int cp_offset);
+    void ClearRegisters(int reg_from, int reg_to);
+    void WriteBacktrackStackPointerToRegister(int reg);
+    void PushBacktrack(jit::Label* label);
+    void BindBacktrack(jit::Label* label);
+
+    // Compares two-byte strings case insensitively.
+    // Called from generated RegExp code.
+    static int CaseInsensitiveCompareUC16(jit::Address byte_offset1,
+                                          jit::Address byte_offset2,
+                                          size_t byte_length);
+
+    // Byte map of one byte characters with a 0xff if the character is a word
+    // character (digit, letter or underscore) and 0x00 otherwise.
+    // Used by generated RegExp code.
+    static const uint8_t word_character_map[256];
+
+    // Byte size of chars in the string to match (decided by the Mode argument)
+    inline int char_size() { return static_cast<int>(mode_); }
+    inline jit::Scale factor() { return mode_ == CHAR16 ? jit::TimesTwo : jit::TimesOne; }
+
+    jit::Label* BranchOrBacktrack(jit::Label* branch);
+
+    // Pushes a register or constant on the backtrack stack. Decrements the
+    // stack pointer by a word size and stores the register's value there.
+    void PushBacktrack(jit::Register value);
+    void PushBacktrack(int32_t value);
+
+    // Pop a value from the backtrack stack.
+    void PopBacktrack(jit::Register target);
+
+    // Check whether we are exceeding the stack limit on the backtrack stack.
+    void CheckBacktrackStackLimit();
+
+    void LoadCurrentCharacterUnchecked(int cp_offset, int characters);
+
+  private:
+    jit::MacroAssembler masm;
+
+    JSRuntime* runtime;
+    Mode mode_;
+    jit::Label entry_label_;
+    jit::Label start_label_;
+    jit::Label backtrack_label_;
+    jit::Label success_label_;
+    jit::Label exit_label_;
+    jit::Label stack_overflow_label_;
+    jit::Label exit_with_exception_label_;
+
+    // Set of registers which are used by the code generator, and as such which
+    // are saved.
+    jit::LiveGeneralRegisterSet savedNonVolatileRegisters;
+
+    struct LabelPatch {
+        // Once it is bound via BindBacktrack, |label| becomes null and
+        // |labelOffset| is set.
+        jit::Label* label;
+        size_t labelOffset;
+
+        jit::CodeOffset patchOffset;
+
+        LabelPatch(jit::Label* label, jit::CodeOffset patchOffset)
+          : label(label), labelOffset(0), patchOffset(patchOffset)
+        {}
+    };
+
+    Vector<LabelPatch, 4, SystemAllocPolicy> labelPatches;
+
+    // See RegExpMacroAssembler.cpp for the meaning of these registers.
+    jit::Register input_end_pointer;
+    jit::Register current_character;
+    jit::Register current_position;
+    jit::Register backtrack_stack_pointer;
+    jit::Register temp0, temp1, temp2;
+
+    // The frame_pointer-relative location of a regexp register.
+    jit::Address register_location(int register_index) {
+        checkRegister(register_index);
+        return jit::Address(masm.getStackPointer(), register_offset(register_index));
+    }
+
+    int32_t register_offset(int register_index) {
+        return sizeof(FrameData) + register_index * sizeof(void*);
+    }
+};
+
+} }  // namespace js::irregexp
+
+#endif  // V8_NATIVE_REGEXP_MACRO_ASSEMBLER_H_