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1 //===- subzero/src/IceAssembler.h - Integrated assembler --------*- C++ -*-===// | 1 //===- subzero/src/IceAssembler.h - Integrated assembler --------*- C++ -*-===// |
2 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 2 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
3 // for details. All rights reserved. Use of this source code is governed by a | 3 // for details. All rights reserved. Use of this source code is governed by a |
4 // BSD-style license that can be found in the LICENSE file. | 4 // BSD-style license that can be found in the LICENSE file. |
5 // | 5 // |
6 // Modified by the Subzero authors. | 6 // Modified by the Subzero authors. |
7 // | 7 // |
8 //===----------------------------------------------------------------------===// | 8 //===----------------------------------------------------------------------===// |
9 // | 9 // |
10 // The Subzero Code Generator | 10 // The Subzero Code Generator |
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148 } | 148 } |
149 | 149 |
150 void extendCapacity(); | 150 void extendCapacity(); |
151 }; | 151 }; |
152 | 152 |
153 class Assembler { | 153 class Assembler { |
154 Assembler(const Assembler &) = delete; | 154 Assembler(const Assembler &) = delete; |
155 Assembler &operator=(const Assembler &) = delete; | 155 Assembler &operator=(const Assembler &) = delete; |
156 | 156 |
157 public: | 157 public: |
158 Assembler() | 158 Assembler() : Allocator(), Buffer(*this) {} |
159 : Allocator(), FunctionName(""), IsInternal(false), Preliminary(false), | |
160 Buffer(*this) {} | |
161 virtual ~Assembler() = default; | 159 virtual ~Assembler() = default; |
162 | 160 |
163 // Allocate a chunk of bytes using the per-Assembler allocator. | 161 // Allocate a chunk of bytes using the per-Assembler allocator. |
164 uintptr_t allocateBytes(size_t bytes) { | 162 uintptr_t allocateBytes(size_t bytes) { |
165 // For now, alignment is not related to NaCl bundle alignment, since | 163 // For now, alignment is not related to NaCl bundle alignment, since |
166 // the buffer's GetPosition is relative to the base. So NaCl bundle | 164 // the buffer's GetPosition is relative to the base. So NaCl bundle |
167 // alignment checks can be relative to that base. Later, the buffer | 165 // alignment checks can be relative to that base. Later, the buffer |
168 // will be copied out to a ".text" section (or an in memory-buffer | 166 // will be copied out to a ".text" section (or an in memory-buffer |
169 // that can be mprotect'ed with executable permission), and that | 167 // that can be mprotect'ed with executable permission), and that |
170 // second buffer should be aligned for NaCl. | 168 // second buffer should be aligned for NaCl. |
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210 // Roll back to a (smaller) size. | 208 // Roll back to a (smaller) size. |
211 void setBufferSize(intptr_t NewSize) { Buffer.setSize(NewSize); } | 209 void setBufferSize(intptr_t NewSize) { Buffer.setSize(NewSize); } |
212 void setPreliminary(bool Value) { Preliminary = Value; } | 210 void setPreliminary(bool Value) { Preliminary = Value; } |
213 bool getPreliminary() const { return Preliminary; } | 211 bool getPreliminary() const { return Preliminary; } |
214 | 212 |
215 private: | 213 private: |
216 ArenaAllocator<32 * 1024> Allocator; | 214 ArenaAllocator<32 * 1024> Allocator; |
217 // FunctionName and IsInternal are transferred from the original Cfg | 215 // FunctionName and IsInternal are transferred from the original Cfg |
218 // object, since the Cfg object may be deleted by the time the | 216 // object, since the Cfg object may be deleted by the time the |
219 // assembler buffer is emitted. | 217 // assembler buffer is emitted. |
220 IceString FunctionName; | 218 IceString FunctionName = ""; |
221 bool IsInternal; | 219 bool IsInternal = false; |
222 // Preliminary indicates whether a preliminary pass is being made | 220 // Preliminary indicates whether a preliminary pass is being made |
223 // for calculating bundle padding (Preliminary=true), versus the | 221 // for calculating bundle padding (Preliminary=true), versus the |
224 // final pass where all changes to label bindings, label links, and | 222 // final pass where all changes to label bindings, label links, and |
225 // relocation fixups are fully committed (Preliminary=false). | 223 // relocation fixups are fully committed (Preliminary=false). |
226 bool Preliminary; | 224 bool Preliminary = false; |
227 | 225 |
228 protected: | 226 protected: |
229 // Buffer's constructor uses the Allocator, so it needs to appear after it. | 227 // Buffer's constructor uses the Allocator, so it needs to appear after it. |
230 // TODO(jpp): dependencies on construction order are a nice way of shooting | 228 // TODO(jpp): dependencies on construction order are a nice way of shooting |
231 // yourself in the foot. Fix this. | 229 // yourself in the foot. Fix this. |
232 AssemblerBuffer Buffer; | 230 AssemblerBuffer Buffer; |
233 }; | 231 }; |
234 | 232 |
235 } // end of namespace Ice | 233 } // end of namespace Ice |
236 | 234 |
237 #endif // SUBZERO_SRC_ICEASSEMBLER_H_ | 235 #endif // SUBZERO_SRC_ICEASSEMBLER_H_ |
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