Mercurial > lcfOS

annotate python/codegen/registerallocator.py @ 300:158068af716c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
yafm
author Windel Bouwman
date Tue, 03 Dec 2013 18:00:22 +0100
parents 9417caea2eb3
children
rev   line source
296
9417caea2eb3 Directorized some backend files
Windel Bouwman
parents: 280
diff changeset
1 from .flowgraph import FlowGraph
9417caea2eb3 Directorized some backend files
Windel Bouwman
parents: 280
diff changeset
2 from .interferencegraph import InterferenceGraph
269
5f8c04a8d26b Towards better modularity
Windel Bouwman
parents: 175
diff changeset
3
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
4 # Nifty first function:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
5 first = lambda x: next(iter(x))
173
c1d2b6b9f9a7 Rework into passes
Windel Bouwman
parents:
diff changeset
6
300
Windel Bouwman
parents: 296
diff changeset
7
173
c1d2b6b9f9a7 Rework into passes
Windel Bouwman
parents:
diff changeset
8 class RegisterAllocator:
277
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
9 """
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
10 Target independent register allocator.
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
11
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
12 Algorithm is iterated register coalescing by Appel and George.
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
13
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
14 Chaitin's algorithm: remove all nodes with less than K neighbours.
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
15 These nodes can be colored when added back.
277
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
16
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
17 The process consists of the following steps:
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
18 - build interference graph from the instruction list
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
19 - remove low degree non move related nodes.
277
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
20 - (optional) coalesc registers to remove redundant moves
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
21 - (optional) spill registers
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
22 - select registers
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
23 """
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
24
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
25 def InitData(self, f):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
26 self.f = f
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
27 # Register information:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
28 self.regs = set(f.regs)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
29 self.K = len(self.regs)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
30
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
31 # Move related sets:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
32 self.coalescedMoves = set()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
33 self.constrainedMoves = set()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
34 self.frozenMoves = set()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
35 self.activeMoves = set()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
36 self.worklistMoves = set()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
37
279
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
38 def printLive(self):
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
39 print('Liveness:')
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
40 for i in self.f.instructions:
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
41 cfgn = self.f.cfg._map[i]
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
42 print(i, cfgn.live_in)
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
43
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
44 def Build(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
45 """ 1. Construct interference graph from instruction list """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
46 self.f.cfg = FlowGraph(self.f.instructions)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
47 self.f.ig = InterferenceGraph(self.f.cfg)
279
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
48
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
49 self.Node = self.f.ig.getNode
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
50
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
51 # Divide nodes into pre-colored and initial:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
52 pre_tmp = list(self.f.tempMap.keys())
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
53 self.precolored = set(self.Node(tmp) for tmp in pre_tmp)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
54 self.workSet = set(self.f.ig.nodes - self.precolored)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
55
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
56 for n in self.precolored:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
57 n.addDegree = 100 + len(self.f.ig.nodes) + self.K
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
58
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
59 # Initialize color map:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
60 self.color = {}
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
61 for tmp, c in self.f.tempMap.items():
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
62 self.color[self.Node(tmp)] = c
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
63
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
64 self.moves = [i for i in self.f.instructions if i.ismove]
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
65 for mv in self.moves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
66 self.Node(mv.src[0]).moves.add(mv)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
67 self.Node(mv.dst[0]).moves.add(mv)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
68
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
69 def NodeMoves(self, n):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
70 return n.moves & (self.activeMoves | self.worklistMoves)
300
Windel Bouwman
parents: 296
diff changeset
71
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
72 def MoveRelated(self, n):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
73 return bool(self.NodeMoves(n))
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
74
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
75 @property
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
76 def SpillWorkSet(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
77 c = lambda n: n.Degree >= self.K
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
78 return set(filter(c, self.workSet))
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
79
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
80 @property
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
81 def FreezeWorkSet(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
82 c = lambda n: n.Degree < self.K and self.MoveRelated(n)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
83 return set(filter(c, self.workSet))
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
84
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
85 @property
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
86 def SimplifyWorkSet(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
87 c = lambda n: n.Degree < self.K and not self.MoveRelated(n)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
88 return set(filter(c, self.workSet))
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
89
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
90 def makeWorkList(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
91 """ Divide initial nodes into worklists """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
92 self.selectStack = []
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
93
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
94 # Fill initial move set:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
95 for m in self.moves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
96 self.worklistMoves.add(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
97
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
98 def Simplify(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
99 """ 2. Remove nodes from the graph """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
100 n = first(self.SimplifyWorkSet)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
101 self.workSet.remove(n)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
102 self.selectStack.append(n)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
103 # Pop out of graph:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
104 self.f.ig.delNode(n)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
105
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
106 def EnableMoves(self, nodes):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
107 for n in nodes:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
108 for m in self.NodeMoves(n):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
109 if m in self.activeMoves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
110 self.activeMoves.remove(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
111 self.worklistMoves.add(m)
300
Windel Bouwman
parents: 296
diff changeset
112
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
113 def Coalesc(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
114 """ Coalesc conservative. """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
115 m = first(self.worklistMoves)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
116 x = self.Node(m.dst[0])
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
117 y = self.Node(m.src[0])
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
118 u, v = (y, x) if y in self.precolored else (x, y)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
119 self.worklistMoves.remove(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
120 if u is v:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
121 self.coalescedMoves.add(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
122 elif v in self.precolored or self.f.ig.hasEdge(u, v):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
123 self.constrainedMoves.add(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
124 elif u not in self.precolored and self.Conservative(u, v):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
125 self.coalescedMoves.add(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
126 self.workSet.remove(v)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
127 self.f.ig.Combine(u, v)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
128 else:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
129 self.activeMoves.add(m)
300
Windel Bouwman
parents: 296
diff changeset
130
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
131 def Conservative(self, u, v):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
132 """ Briggs conservative criteria for coalesc """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
133 nodes = u.Adjecent | v.Adjecent
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
134 c = lambda n: n.Degree >= self.K
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
135 k = len(list(filter(c, nodes)))
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
136 return k < self.K
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
137
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
138 def Freeze(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
139 """ Give up coalescing on some node """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
140 u = first(self.FreezeWorkSet)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
141 self.freezeMoves(u)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
142
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
143 def freezeMoves(self, u):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
144 """ Freeze moves for node u """
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
145 for m in self.NodeMoves(u):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
146 if m in self.activeMoves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
147 self.activeMoves.remove(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
148 else:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
149 sekf.worklistMoves.remove(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
150 self.frozenMoves.add(m)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
151 # Check other part of the move for still being move related:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
152 v = m.src[0] if u is m.dst[0] else m.dst[0]
300
Windel Bouwman
parents: 296
diff changeset
153
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
154 def SelectSpill(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
155 # TODO
277
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
156 pass
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
157
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
158 def AssignColors(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
159 """ Add nodes back to the graph to color it. """
300
Windel Bouwman
parents: 296
diff changeset
160 # Add nodes back to the graph:
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
161 while self.selectStack:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
162 n = self.selectStack.pop(-1)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
163 self.f.ig.addNode(n)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
164 takenregs = set(self.color[m] for m in n.Adjecent)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
165 okColors = self.regs - takenregs
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
166 if okColors:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
167 self.color[n] = first(okColors)
279
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
168 n.color = self.color[n]
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
169 else:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
170 raise NotImplementedError('Spill required here!')
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
171
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
172 def ApplyColors(self):
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
173 # Remove coalesced moves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
174 for mv in self.coalescedMoves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
175 self.f.instructions.remove(mv)
279
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
176
277
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
177 # Use allocated registers:
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
178 lookup = lambda t: self.color[self.Node(t)]
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
179 for i in self.f.instructions:
277
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
180 i.src = tuple(map(lookup, i.src))
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
181 i.dst = tuple(map(lookup, i.dst))
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
182
046017431c6a Started register allocator
Windel Bouwman
parents: 275
diff changeset
183 def allocFrame(self, f):
279
2ccd57b1d78c Fix register allocator to do burn2 OK
Windel Bouwman
parents: 278
diff changeset
184 """ Do iterated register allocation for a single stack frame. """
278
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
185 self.InitData(f)
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
186 self.Build()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
187 self.makeWorkList()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
188 while True:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
189 if self.SimplifyWorkSet:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
190 self.Simplify()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
191 elif self.worklistMoves:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
192 self.Coalesc()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
193 elif self.FreezeWorkSet:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
194 self.Freeze()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
195 elif self.SpillWorkSet:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
196 raise NotImplementedError('Spill not implemented')
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
197 else:
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
198 break # Done!
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
199 self.AssignColors()
9fca39eebe50 First implementation of regalloc with coalsesc
Windel Bouwman
parents: 277
diff changeset
200 self.ApplyColors()
173
c1d2b6b9f9a7 Rework into passes
Windel Bouwman
parents:
diff changeset
201