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1 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- C++ -*-===// | 1 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- C++ -*-===// |
2 // | 2 // |
3 // The Subzero Code Generator | 3 // The Subzero Code Generator |
4 // | 4 // |
5 // This file is distributed under the University of Illinois Open Source | 5 // This file is distributed under the University of Illinois Open Source |
6 // License. See LICENSE.TXT for details. | 6 // License. See LICENSE.TXT for details. |
7 // | 7 // |
8 //===----------------------------------------------------------------------===// | 8 //===----------------------------------------------------------------------===// |
9 // | 9 // |
10 // This file declares the TargetLowering and LoweringContext | 10 // This file declares the TargetLowering and LoweringContext |
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149 RegSet_FramePointer = 1 << 3, | 149 RegSet_FramePointer = 1 << 3, |
150 RegSet_All = ~RegSet_None | 150 RegSet_All = ~RegSet_None |
151 }; | 151 }; |
152 typedef uint32_t RegSetMask; | 152 typedef uint32_t RegSetMask; |
153 | 153 |
154 virtual llvm::SmallBitVector getRegisterSet(RegSetMask Include, | 154 virtual llvm::SmallBitVector getRegisterSet(RegSetMask Include, |
155 RegSetMask Exclude) const = 0; | 155 RegSetMask Exclude) const = 0; |
156 virtual const llvm::SmallBitVector &getRegisterSetForType(Type Ty) const = 0; | 156 virtual const llvm::SmallBitVector &getRegisterSetForType(Type Ty) const = 0; |
157 void regAlloc(); | 157 void regAlloc(); |
158 | 158 |
| 159 virtual void makeRandomRegisterPermutation( |
| 160 llvm::SmallVectorImpl<int32_t> &Permutation, |
| 161 const llvm::SmallBitVector &ExcludeRegisters) = 0; |
| 162 |
159 virtual void emitVariable(const Variable *Var, const Cfg *Func) const = 0; | 163 virtual void emitVariable(const Variable *Var, const Cfg *Func) const = 0; |
160 | 164 |
161 // Performs target-specific argument lowering. | 165 // Performs target-specific argument lowering. |
162 virtual void lowerArguments() = 0; | 166 virtual void lowerArguments() = 0; |
163 | 167 |
164 virtual void addProlog(CfgNode *Node) = 0; | 168 virtual void addProlog(CfgNode *Node) = 0; |
165 virtual void addEpilog(CfgNode *Node) = 0; | 169 virtual void addEpilog(CfgNode *Node) = 0; |
166 | 170 |
167 virtual void emitConstants() const = 0; | 171 virtual void emitConstants() const = 0; |
168 | 172 |
169 virtual ~TargetLowering() {} | 173 virtual ~TargetLowering() {} |
170 | 174 |
171 protected: | 175 protected: |
172 TargetLowering(Cfg *Func) | 176 TargetLowering(Cfg *Func); |
173 : Func(Func), Ctx(Func->getContext()), HasComputedFrame(false), | |
174 StackAdjustment(0) {} | |
175 virtual void lowerAlloca(const InstAlloca *Inst) = 0; | 177 virtual void lowerAlloca(const InstAlloca *Inst) = 0; |
176 virtual void lowerArithmetic(const InstArithmetic *Inst) = 0; | 178 virtual void lowerArithmetic(const InstArithmetic *Inst) = 0; |
177 virtual void lowerAssign(const InstAssign *Inst) = 0; | 179 virtual void lowerAssign(const InstAssign *Inst) = 0; |
178 virtual void lowerBr(const InstBr *Inst) = 0; | 180 virtual void lowerBr(const InstBr *Inst) = 0; |
179 virtual void lowerCall(const InstCall *Inst) = 0; | 181 virtual void lowerCall(const InstCall *Inst) = 0; |
180 virtual void lowerCast(const InstCast *Inst) = 0; | 182 virtual void lowerCast(const InstCast *Inst) = 0; |
181 virtual void lowerFcmp(const InstFcmp *Inst) = 0; | 183 virtual void lowerFcmp(const InstFcmp *Inst) = 0; |
182 virtual void lowerExtractElement(const InstExtractElement *Inst) = 0; | 184 virtual void lowerExtractElement(const InstExtractElement *Inst) = 0; |
183 virtual void lowerIcmp(const InstIcmp *Inst) = 0; | 185 virtual void lowerIcmp(const InstIcmp *Inst) = 0; |
184 virtual void lowerInsertElement(const InstInsertElement *Inst) = 0; | 186 virtual void lowerInsertElement(const InstInsertElement *Inst) = 0; |
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201 // subsequent global register allocation pass. | 203 // subsequent global register allocation pass. |
202 virtual void postLower() {} | 204 virtual void postLower() {} |
203 | 205 |
204 Cfg *Func; | 206 Cfg *Func; |
205 GlobalContext *Ctx; | 207 GlobalContext *Ctx; |
206 bool HasComputedFrame; | 208 bool HasComputedFrame; |
207 // StackAdjustment keeps track of the current stack offset from its | 209 // StackAdjustment keeps track of the current stack offset from its |
208 // natural location, as arguments are pushed for a function call. | 210 // natural location, as arguments are pushed for a function call. |
209 int32_t StackAdjustment; | 211 int32_t StackAdjustment; |
210 LoweringContext Context; | 212 LoweringContext Context; |
| 213 const bool RandomizeRegisterAllocation; |
211 | 214 |
212 private: | 215 private: |
213 TargetLowering(const TargetLowering &) LLVM_DELETED_FUNCTION; | 216 TargetLowering(const TargetLowering &) LLVM_DELETED_FUNCTION; |
214 TargetLowering &operator=(const TargetLowering &) LLVM_DELETED_FUNCTION; | 217 TargetLowering &operator=(const TargetLowering &) LLVM_DELETED_FUNCTION; |
215 }; | 218 }; |
216 | 219 |
217 // TargetGlobalInitLowering is used for "lowering" global | 220 // TargetGlobalInitLowering is used for "lowering" global |
218 // initializers. It is separated out from TargetLowering because it | 221 // initializers. It is separated out from TargetLowering because it |
219 // does not require a Cfg. | 222 // does not require a Cfg. |
220 class TargetGlobalInitLowering { | 223 class TargetGlobalInitLowering { |
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235 private: | 238 private: |
236 TargetGlobalInitLowering(const TargetGlobalInitLowering &) | 239 TargetGlobalInitLowering(const TargetGlobalInitLowering &) |
237 LLVM_DELETED_FUNCTION; | 240 LLVM_DELETED_FUNCTION; |
238 TargetGlobalInitLowering & | 241 TargetGlobalInitLowering & |
239 operator=(const TargetGlobalInitLowering &) LLVM_DELETED_FUNCTION; | 242 operator=(const TargetGlobalInitLowering &) LLVM_DELETED_FUNCTION; |
240 }; | 243 }; |
241 | 244 |
242 } // end of namespace Ice | 245 } // end of namespace Ice |
243 | 246 |
244 #endif // SUBZERO_SRC_ICETARGETLOWERING_H | 247 #endif // SUBZERO_SRC_ICETARGETLOWERING_H |
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