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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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102 virtual void translateO0() { | 102 virtual void translateO0() { |
103 Func->setError("Target doesn't specify O0 lowering steps."); | 103 Func->setError("Target doesn't specify O0 lowering steps."); |
104 } | 104 } |
105 virtual void translateO1() { | 105 virtual void translateO1() { |
106 Func->setError("Target doesn't specify O1 lowering steps."); | 106 Func->setError("Target doesn't specify O1 lowering steps."); |
107 } | 107 } |
108 virtual void translateO2() { | 108 virtual void translateO2() { |
109 Func->setError("Target doesn't specify O2 lowering steps."); | 109 Func->setError("Target doesn't specify O2 lowering steps."); |
110 } | 110 } |
111 | 111 |
| 112 // Tries to do address mode optimization on a single instruction. |
| 113 void doAddressOpt(); |
112 // Lowers a single instruction. | 114 // Lowers a single instruction. |
113 void lower(); | 115 void lower(); |
114 | 116 |
115 // Returns a variable pre-colored to the specified physical | 117 // Returns a variable pre-colored to the specified physical |
116 // register. This is generally used to get very direct access to | 118 // register. This is generally used to get very direct access to |
117 // the register such as in the prolog or epilog or for marking | 119 // the register such as in the prolog or epilog or for marking |
118 // scratch registers as killed by a call. | 120 // scratch registers as killed by a call. |
119 virtual Variable *getPhysicalRegister(SizeT RegNum) = 0; | 121 virtual Variable *getPhysicalRegister(SizeT RegNum) = 0; |
120 // Returns a printable name for the register. | 122 // Returns a printable name for the register. |
121 virtual IceString getRegName(SizeT RegNum, Type Ty) const = 0; | 123 virtual IceString getRegName(SizeT RegNum, Type Ty) const = 0; |
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166 virtual void lowerFcmp(const InstFcmp *Inst) = 0; | 168 virtual void lowerFcmp(const InstFcmp *Inst) = 0; |
167 virtual void lowerIcmp(const InstIcmp *Inst) = 0; | 169 virtual void lowerIcmp(const InstIcmp *Inst) = 0; |
168 virtual void lowerLoad(const InstLoad *Inst) = 0; | 170 virtual void lowerLoad(const InstLoad *Inst) = 0; |
169 virtual void lowerPhi(const InstPhi *Inst) = 0; | 171 virtual void lowerPhi(const InstPhi *Inst) = 0; |
170 virtual void lowerRet(const InstRet *Inst) = 0; | 172 virtual void lowerRet(const InstRet *Inst) = 0; |
171 virtual void lowerSelect(const InstSelect *Inst) = 0; | 173 virtual void lowerSelect(const InstSelect *Inst) = 0; |
172 virtual void lowerStore(const InstStore *Inst) = 0; | 174 virtual void lowerStore(const InstStore *Inst) = 0; |
173 virtual void lowerSwitch(const InstSwitch *Inst) = 0; | 175 virtual void lowerSwitch(const InstSwitch *Inst) = 0; |
174 virtual void lowerUnreachable(const InstUnreachable *Inst) = 0; | 176 virtual void lowerUnreachable(const InstUnreachable *Inst) = 0; |
175 | 177 |
| 178 virtual void doAddressOptLoad() {} |
| 179 virtual void doAddressOptStore() {} |
176 // This gives the target an opportunity to post-process the lowered | 180 // This gives the target an opportunity to post-process the lowered |
177 // expansion before returning. The primary intention is to do some | 181 // expansion before returning. The primary intention is to do some |
178 // Register Manager activity as necessary, specifically to eagerly | 182 // Register Manager activity as necessary, specifically to eagerly |
179 // allocate registers based on affinity and other factors. The | 183 // allocate registers based on affinity and other factors. The |
180 // simplest lowering does nothing here and leaves it all to a | 184 // simplest lowering does nothing here and leaves it all to a |
181 // subsequent global register allocation pass. | 185 // subsequent global register allocation pass. |
182 virtual void postLower() {} | 186 virtual void postLower() {} |
183 | 187 |
184 Cfg *Func; | 188 Cfg *Func; |
185 GlobalContext *Ctx; | 189 GlobalContext *Ctx; |
186 bool HasComputedFrame; | 190 bool HasComputedFrame; |
187 // StackAdjustment keeps track of the current stack offset from its | 191 // StackAdjustment keeps track of the current stack offset from its |
188 // natural location, as arguments are pushed for a function call. | 192 // natural location, as arguments are pushed for a function call. |
189 int32_t StackAdjustment; | 193 int32_t StackAdjustment; |
190 LoweringContext Context; | 194 LoweringContext Context; |
191 | 195 |
192 private: | 196 private: |
193 TargetLowering(const TargetLowering &) LLVM_DELETED_FUNCTION; | 197 TargetLowering(const TargetLowering &) LLVM_DELETED_FUNCTION; |
194 TargetLowering &operator=(const TargetLowering &) LLVM_DELETED_FUNCTION; | 198 TargetLowering &operator=(const TargetLowering &) LLVM_DELETED_FUNCTION; |
195 }; | 199 }; |
196 | 200 |
197 } // end of namespace Ice | 201 } // end of namespace Ice |
198 | 202 |
199 #endif // SUBZERO_SRC_ICETARGETLOWERING_H | 203 #endif // SUBZERO_SRC_ICETARGETLOWERING_H |
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