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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 |
11 // classes. TargetLowering is an abstract class used to drive the | 11 // classes. TargetLowering is an abstract class used to drive the |
12 // translation/lowering process. LoweringContext maintains a | 12 // translation/lowering process. LoweringContext maintains a |
13 // context for lowering each instruction, offering conveniences such | 13 // context for lowering each instruction, offering conveniences such |
14 // as iterating over non-deleted instructions. | 14 // as iterating over non-deleted instructions. |
15 // | 15 // |
16 //===----------------------------------------------------------------------===// | 16 //===----------------------------------------------------------------------===// |
17 | 17 |
18 #ifndef SUBZERO_SRC_ICETARGETLOWERING_H | 18 #ifndef SUBZERO_SRC_ICETARGETLOWERING_H |
19 #define SUBZERO_SRC_ICETARGETLOWERING_H | 19 #define SUBZERO_SRC_ICETARGETLOWERING_H |
20 | 20 |
21 #include "IceDefs.h" | 21 #include "IceDefs.h" |
22 #include "IceInst.h" // for the names of the Inst subtypes | 22 #include "IceInst.h" // for the names of the Inst subtypes |
23 #include "IceTypes.h" | 23 #include "IceTypes.h" |
24 | 24 |
25 namespace Ice { | 25 namespace Ice { |
26 | 26 |
27 class Assembler; | |
28 | |
29 // LoweringContext makes it easy to iterate through non-deleted | 27 // LoweringContext makes it easy to iterate through non-deleted |
30 // instructions in a node, and insert new (lowered) instructions at | 28 // instructions in a node, and insert new (lowered) instructions at |
31 // the current point. Along with the instruction list container and | 29 // the current point. Along with the instruction list container and |
32 // associated iterators, it holds the current node, which is needed | 30 // associated iterators, it holds the current node, which is needed |
33 // when inserting new instructions in order to track whether variables | 31 // when inserting new instructions in order to track whether variables |
34 // are used as single-block or multi-block. | 32 // are used as single-block or multi-block. |
35 class LoweringContext { | 33 class LoweringContext { |
36 LoweringContext(const LoweringContext &) = delete; | 34 LoweringContext(const LoweringContext &) = delete; |
37 LoweringContext &operator=(const LoweringContext &) = delete; | 35 LoweringContext &operator=(const LoweringContext &) = delete; |
38 | 36 |
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87 void skipDeleted(InstList::iterator &I) const; | 85 void skipDeleted(InstList::iterator &I) const; |
88 void advanceForward(InstList::iterator &I) const; | 86 void advanceForward(InstList::iterator &I) const; |
89 }; | 87 }; |
90 | 88 |
91 class TargetLowering { | 89 class TargetLowering { |
92 TargetLowering(const TargetLowering &) = delete; | 90 TargetLowering(const TargetLowering &) = delete; |
93 TargetLowering &operator=(const TargetLowering &) = delete; | 91 TargetLowering &operator=(const TargetLowering &) = delete; |
94 | 92 |
95 public: | 93 public: |
96 static TargetLowering *createLowering(TargetArch Target, Cfg *Func); | 94 static TargetLowering *createLowering(TargetArch Target, Cfg *Func); |
97 static Assembler *createAssembler(TargetArch Target, Cfg *Func); | 95 static std::unique_ptr<Assembler> createAssembler(TargetArch Target, |
| 96 Cfg *Func); |
98 void translate() { | 97 void translate() { |
99 switch (Ctx->getOptLevel()) { | 98 switch (Ctx->getOptLevel()) { |
100 case Opt_m1: | 99 case Opt_m1: |
101 translateOm1(); | 100 translateOm1(); |
102 break; | 101 break; |
103 case Opt_0: | 102 case Opt_0: |
104 translateO0(); | 103 translateO0(); |
105 break; | 104 break; |
106 case Opt_1: | 105 case Opt_1: |
107 translateO1(); | 106 translateO1(); |
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262 virtual void lower(const VariableDeclaration &Var) = 0; | 261 virtual void lower(const VariableDeclaration &Var) = 0; |
263 | 262 |
264 protected: | 263 protected: |
265 TargetGlobalInitLowering(GlobalContext *Ctx) : Ctx(Ctx) {} | 264 TargetGlobalInitLowering(GlobalContext *Ctx) : Ctx(Ctx) {} |
266 GlobalContext *Ctx; | 265 GlobalContext *Ctx; |
267 }; | 266 }; |
268 | 267 |
269 } // end of namespace Ice | 268 } // end of namespace Ice |
270 | 269 |
271 #endif // SUBZERO_SRC_ICETARGETLOWERING_H | 270 #endif // SUBZERO_SRC_ICETARGETLOWERING_H |
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