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1 //===- subzero/src/IceOperand.cpp - High-level operand implementation -----===// | 1 //===- subzero/src/IceOperand.cpp - High-level operand 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 /// \file | 10 /// \file |
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94 RegNumT::BaseType RegNumT::Limit = 0; | 94 RegNumT::BaseType RegNumT::Limit = 0; |
95 | 95 |
96 bool operator<(const RegWeight &A, const RegWeight &B) { | 96 bool operator<(const RegWeight &A, const RegWeight &B) { |
97 return A.getWeight() < B.getWeight(); | 97 return A.getWeight() < B.getWeight(); |
98 } | 98 } |
99 bool operator<=(const RegWeight &A, const RegWeight &B) { return !(B < A); } | 99 bool operator<=(const RegWeight &A, const RegWeight &B) { return !(B < A); } |
100 bool operator==(const RegWeight &A, const RegWeight &B) { | 100 bool operator==(const RegWeight &A, const RegWeight &B) { |
101 return !(B < A) && !(A < B); | 101 return !(B < A) && !(A < B); |
102 } | 102 } |
103 | 103 |
104 void LiveRange::addSegment(InstNumberT Start, InstNumberT End) { | 104 void LiveRange::addSegment(InstNumberT Start, InstNumberT End, CfgNode *Node) { |
105 if (!Range.empty()) { | 105 if (getFlags().getSplitGlobalVars()) { |
106 // Check for merge opportunity. | 106 // Disable merging to make sure a live range 'segment' has a single node. |
107 InstNumberT CurrentEnd = Range.back().second; | 107 // Might be possible to enable when the target segment has the same node. |
108 assert(Start >= CurrentEnd); | 108 assert(NodeMap.find(Start) == NodeMap.end()); |
109 if (Start == CurrentEnd) { | 109 NodeMap[Start] = Node; |
110 Range.back().second = End; | 110 } else { |
111 return; | 111 if (!Range.empty()) { |
| 112 // Check for merge opportunity. |
| 113 InstNumberT CurrentEnd = Range.back().second; |
| 114 assert(Start >= CurrentEnd); |
| 115 if (Start == CurrentEnd) { |
| 116 Range.back().second = End; |
| 117 return; |
| 118 } |
112 } | 119 } |
113 } | 120 } |
114 Range.push_back(RangeElementType(Start, End)); | 121 Range.push_back(RangeElementType(Start, End)); |
115 } | 122 } |
116 | 123 |
117 // Returns true if this live range ends before Other's live range starts. This | 124 // Returns true if this live range ends before Other's live range starts. This |
118 // means that the highest instruction number in this live range is less than or | 125 // means that the highest instruction number in this live range is less than or |
119 // equal to the lowest instruction number of the Other live range. | 126 // equal to the lowest instruction number of the Other live range. |
120 bool LiveRange::endsBefore(const LiveRange &Other) const { | 127 bool LiveRange::endsBefore(const LiveRange &Other) const { |
121 // Neither range should be empty, but let's be graceful. | 128 // Neither range should be empty, but let's be graceful. |
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649 if (getType() != IceType_i32 && getType() != IceType_i16 && | 656 if (getType() != IceType_i32 && getType() != IceType_i16 && |
650 getType() != IceType_i8) | 657 getType() != IceType_i8) |
651 return false; | 658 return false; |
652 // The Following checks if the signed representation of Value is between | 659 // The Following checks if the signed representation of Value is between |
653 // -Threshold/2 and +Threshold/2 | 660 // -Threshold/2 and +Threshold/2 |
654 bool largerThanThreshold = Threshold / 2 + Value >= Threshold; | 661 bool largerThanThreshold = Threshold / 2 + Value >= Threshold; |
655 return largerThanThreshold; | 662 return largerThanThreshold; |
656 } | 663 } |
657 | 664 |
658 } // end of namespace Ice | 665 } // end of namespace Ice |
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