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1 //===- subzero/src/IceTargetLowering.cpp - Basic lowering implementation --===// | 1 //===- subzero/src/IceTargetLowering.cpp - Basic lowering implementation --===// |
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 implements the skeleton of the TargetLowering class, | 10 // This file implements the skeleton of the TargetLowering class, |
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47 Begin = getNode()->getInsts().begin(); | 47 Begin = getNode()->getInsts().begin(); |
48 Cur = Begin; | 48 Cur = Begin; |
49 End = getNode()->getInsts().end(); | 49 End = getNode()->getInsts().end(); |
50 skipDeleted(Cur); | 50 skipDeleted(Cur); |
51 Next = Cur; | 51 Next = Cur; |
52 advanceForward(Next); | 52 advanceForward(Next); |
53 } | 53 } |
54 | 54 |
55 void LoweringContext::insert(Inst *Inst) { | 55 void LoweringContext::insert(Inst *Inst) { |
56 getNode()->getInsts().insert(Next, Inst); | 56 getNode()->getInsts().insert(Next, Inst); |
| 57 LastInserted = Inst; |
57 } | 58 } |
58 | 59 |
59 void LoweringContext::skipDeleted(InstList::iterator &I) const { | 60 void LoweringContext::skipDeleted(InstList::iterator &I) const { |
60 while (I != End && (*I)->isDeleted()) | 61 while (I != End && (*I)->isDeleted()) |
61 ++I; | 62 ++I; |
62 } | 63 } |
63 | 64 |
64 void LoweringContext::advanceForward(InstList::iterator &I) const { | 65 void LoweringContext::advanceForward(InstList::iterator &I) const { |
65 if (I != End) { | 66 if (I != End) { |
66 ++I; | 67 ++I; |
67 skipDeleted(I); | 68 skipDeleted(I); |
68 } | 69 } |
69 } | 70 } |
70 | 71 |
71 void LoweringContext::advanceBackward(InstList::iterator &I) const { | |
72 assert(I != Begin); | |
73 do { | |
74 --I; | |
75 } while (I != Begin && (*I)->isDeleted()); | |
76 } | |
77 | |
78 Inst *LoweringContext::getLastInserted() const { | 72 Inst *LoweringContext::getLastInserted() const { |
79 InstList::iterator Cursor = Next; | 73 assert(LastInserted); |
80 advanceBackward(Cursor); | 74 return LastInserted; |
81 return *Cursor; | |
82 } | 75 } |
83 | 76 |
84 TargetLowering *TargetLowering::createLowering(TargetArch Target, Cfg *Func) { | 77 TargetLowering *TargetLowering::createLowering(TargetArch Target, Cfg *Func) { |
85 // These statements can be #ifdef'd to specialize the code generator | 78 // These statements can be #ifdef'd to specialize the code generator |
86 // to a subset of the available targets. TODO: use CRTP. | 79 // to a subset of the available targets. TODO: use CRTP. |
87 if (Target == Target_X8632) | 80 if (Target == Target_X8632) |
88 return TargetX8632::create(Func); | 81 return TargetX8632::create(Func); |
89 #if 0 | 82 #if 0 |
90 if (Target == Target_X8664) | 83 if (Target == Target_X8664) |
91 return IceTargetX8664::create(Func); | 84 return IceTargetX8664::create(Func); |
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256 if (Target == Target_ARM64) | 249 if (Target == Target_ARM64) |
257 return IceTargetGlobalInitARM64::create(Ctx); | 250 return IceTargetGlobalInitARM64::create(Ctx); |
258 #endif | 251 #endif |
259 llvm_unreachable("Unsupported target"); | 252 llvm_unreachable("Unsupported target"); |
260 return NULL; | 253 return NULL; |
261 } | 254 } |
262 | 255 |
263 TargetGlobalInitLowering::~TargetGlobalInitLowering() {} | 256 TargetGlobalInitLowering::~TargetGlobalInitLowering() {} |
264 | 257 |
265 } // end of namespace Ice | 258 } // end of namespace Ice |
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