Mercurial > lcfOS
annotate python/ppci/ir.py @ 365:98ff43cfdd36
Nasty bug in adr instruction
| author | Windel Bouwman |
|---|---|
| date | Wed, 19 Mar 2014 22:32:04 +0100 |
| parents | c49459768aaa |
| children | 9667d78ba79e |
| rev | line source |
|---|---|
| 277 | 1 """ |
| 2 Intermediate representation (IR) code classes. | |
| 3 """ | |
| 4 | |
| 310 | 5 |
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6 def label_name(dut): |
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7 """ Function that returns the assembly code label name """ |
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8 if isinstance(dut, Block): |
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9 f = dut.function |
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10 return label_name(f) + '_' + dut.name |
| 364 | 11 elif isinstance(dut, Function) or isinstance(dut, GlobalVariable): |
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12 return label_name(dut.module) + '_' + dut.name |
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13 elif isinstance(dut, Module): |
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14 return dut.name |
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15 else: |
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16 raise NotImplementedError(str(dut)) |
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17 |
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18 |
| 277 | 19 class Module: |
| 305 | 20 """ Container unit for variables and functions. """ |
| 277 | 21 def __init__(self, name): |
| 22 self.name = name | |
| 309 | 23 self.functions = [] |
| 277 | 24 self.variables = [] |
| 25 | |
| 26 def __repr__(self): | |
| 309 | 27 return 'module {0}'.format(self.name) |
| 277 | 28 |
| 309 | 29 def add_function(self, f): |
| 30 """ Add a function to this module """ | |
| 31 self.functions.append(f) | |
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32 f.module = self |
| 277 | 33 |
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34 def add_variable(self, v): |
| 364 | 35 assert type(v) is GlobalVariable |
| 277 | 36 self.variables.append(v) |
| 364 | 37 v.module = self |
| 277 | 38 |
| 363 | 39 def get_variables(self): |
| 277 | 40 return self.variables |
| 41 | |
| 363 | 42 Variables = property(get_variables) |
| 277 | 43 |
| 44 def getFunctions(self): | |
| 309 | 45 return self.functions |
| 277 | 46 |
| 47 Functions = property(getFunctions) | |
| 48 | |
| 49 def findFunction(self, name): | |
| 50 for f in self.funcs: | |
| 51 if f.name == name: | |
| 52 return f | |
| 53 raise KeyError(name) | |
| 54 | |
| 55 getFunction = findFunction | |
| 56 | |
| 57 | |
| 58 class Function: | |
| 305 | 59 """ Represents a function. """ |
| 309 | 60 def __init__(self, name, module=None): |
| 277 | 61 self.name = name |
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62 self.entry = Block('entry') |
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63 self.entry.function = self |
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64 self.epiloog = Block('epilog') |
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65 self.epiloog.function = self |
| 277 | 66 self.epiloog.addInstruction(Terminator()) |
| 67 self.return_value = Temp('{}_retval'.format(name)) | |
| 68 self.arguments = [] | |
| 69 self.localvars = [] | |
| 309 | 70 if module: |
| 71 module.add_function(self) | |
| 277 | 72 |
| 73 def __repr__(self): | |
| 74 args = ','.join(str(a) for a in self.arguments) | |
| 309 | 75 return 'function i32 {}({})'.format(self.name, args) |
| 277 | 76 |
| 309 | 77 def add_block(self, bb): |
| 78 #self.bbs.append(bb) | |
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79 bb.function = self |
| 277 | 80 |
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81 def removeBlock(self, bb): |
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82 #self.bbs.remove(bb) |
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83 bb.function = None |
| 277 | 84 |
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85 def getBlocks(self): |
| 277 | 86 bbs = [self.entry] |
| 87 worklist = [self.entry] | |
| 88 while worklist: | |
| 89 b = worklist.pop() | |
| 90 for sb in b.Successors: | |
| 91 if sb not in bbs: | |
| 92 bbs.append(sb) | |
| 93 worklist.append(sb) | |
| 94 bbs.remove(self.entry) | |
| 95 if self.epiloog in bbs: | |
| 96 bbs.remove(self.epiloog) | |
| 97 bbs.insert(0, self.entry) | |
| 98 bbs.append(self.epiloog) | |
| 99 return bbs | |
| 100 | |
| 101 def findBasicBlock(self, name): | |
| 102 for bb in self.bbs: | |
| 103 if bb.name == name: | |
| 104 return bb | |
| 105 raise KeyError(name) | |
| 106 | |
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107 Blocks = property(getBlocks) |
| 277 | 108 |
| 109 @property | |
| 110 def Entry(self): | |
| 111 return self.entry | |
| 112 | |
| 113 def check(self): | |
| 114 for b in self.Blocks: | |
| 115 b.check() | |
| 116 | |
| 117 def addParameter(self, p): | |
| 118 assert type(p) is Parameter | |
| 119 p.num = len(self.arguments) | |
| 120 self.arguments.append(p) | |
| 121 | |
| 122 def addLocal(self, l): | |
| 123 assert type(l) is LocalVariable | |
| 124 self.localvars.append(l) | |
| 125 | |
| 126 | |
| 127 class Block: | |
| 305 | 128 """ |
| 277 | 129 Uninterrupted sequence of instructions with a label at the start. |
| 130 """ | |
| 317 | 131 def __init__(self, name, function=None): |
| 277 | 132 self.name = name |
| 317 | 133 self.function = function |
| 277 | 134 self.instructions = [] |
| 135 | |
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136 parent = property(lambda s: s.function) |
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137 |
| 277 | 138 def __repr__(self): |
| 309 | 139 return '{0}:'.format(self.name) |
| 277 | 140 |
| 141 def addInstruction(self, i): | |
| 142 i.parent = self | |
| 143 assert not isinstance(self.LastInstruction, LastStatement) | |
| 144 self.instructions.append(i) | |
| 145 | |
| 146 def replaceInstruction(self, i1, i2): | |
| 147 idx = self.instructions.index(i1) | |
| 148 i1.parent = None | |
| 149 i1.delete() | |
| 150 i2.parent = self | |
| 151 self.instructions[idx] = i2 | |
| 152 | |
| 153 def removeInstruction(self, i): | |
| 154 i.parent = None | |
| 317 | 155 #i.delete() |
| 277 | 156 self.instructions.remove(i) |
| 157 | |
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158 @property |
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159 def Instructions(self): |
| 277 | 160 return self.instructions |
| 161 | |
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162 @property |
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163 def LastInstruction(self): |
| 277 | 164 if not self.Empty: |
| 165 return self.instructions[-1] | |
| 166 | |
| 167 @property | |
| 168 def Empty(self): | |
| 169 return len(self.instructions) == 0 | |
| 170 | |
| 171 @property | |
| 172 def FirstInstruction(self): | |
| 173 return self.instructions[0] | |
| 174 | |
| 175 def getSuccessors(self): | |
| 176 if not self.Empty: | |
| 177 return self.LastInstruction.Targets | |
| 178 return [] | |
| 312 | 179 |
| 277 | 180 Successors = property(getSuccessors) |
| 181 | |
| 182 def getPredecessors(self): | |
| 183 preds = [] | |
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184 for bb in self.parent.Blocks: |
| 277 | 185 if self in bb.Successors: |
| 186 preds.append(bb) | |
| 187 return preds | |
| 312 | 188 |
| 277 | 189 Predecessors = property(getPredecessors) |
| 190 | |
| 191 def precedes(self, other): | |
| 192 raise NotImplementedError() | |
| 193 | |
| 194 | |
| 195 # Instructions: | |
| 196 | |
| 197 class Expression: | |
| 304 | 198 """ Base class for an expression """ |
| 277 | 199 pass |
| 200 | |
| 201 | |
| 202 class Const(Expression): | |
| 304 | 203 """ Represents a constant value """ |
| 277 | 204 def __init__(self, value): |
| 205 self.value = value | |
| 206 | |
| 207 def __repr__(self): | |
| 208 return 'Const {}'.format(self.value) | |
| 209 | |
| 210 | |
| 211 class Call(Expression): | |
| 305 | 212 """ Call a function with some arguments """ |
| 277 | 213 def __init__(self, f, arguments): |
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214 assert type(f) is str |
| 277 | 215 self.f = f |
| 216 self.arguments = arguments | |
| 217 | |
| 218 def __repr__(self): | |
| 354 | 219 args = ', '.join(str(arg) for arg in self.arguments) |
| 305 | 220 return '{}({})'.format(self.f, args) |
| 277 | 221 |
| 222 | |
| 223 # Data operations | |
| 224 class Binop(Expression): | |
| 304 | 225 """ Generic binary operation """ |
| 277 | 226 ops = ['+', '-', '*', '/', '|', '&', '<<', '>>'] |
| 305 | 227 |
| 277 | 228 def __init__(self, value1, operation, value2): |
| 229 assert operation in Binop.ops | |
| 230 self.a = value1 | |
| 231 self.b = value2 | |
| 232 self.operation = operation | |
| 233 | |
| 234 def __repr__(self): | |
| 235 a, b = self.a, self.b | |
| 236 return '({} {} {})'.format(a, self.operation, b) | |
| 237 | |
| 238 | |
| 239 def Add(a, b): | |
| 305 | 240 """ Add a and b """ |
| 277 | 241 return Binop(a, '+', b) |
| 242 | |
| 292 | 243 |
| 279 | 244 def Sub(a, b): |
| 305 | 245 """ Substract b from a """ |
| 279 | 246 return Binop(a, '-', b) |
| 247 | |
| 292 | 248 |
| 279 | 249 def Mul(a, b): |
| 309 | 250 """ Multiply a by b """ |
| 279 | 251 return Binop(a, '*', b) |
| 252 | |
| 292 | 253 |
| 279 | 254 def Div(a, b): |
| 309 | 255 """ Divide a in b pieces """ |
| 279 | 256 return Binop(a, '/', b) |
| 277 | 257 |
| 303 | 258 |
| 277 | 259 class Eseq(Expression): |
| 260 """ Sequence of instructions where the last is an expression """ | |
| 261 def __init__(self, stmt, e): | |
| 262 self.stmt = stmt | |
| 263 self.e = e | |
| 264 | |
| 265 def __repr__(self): | |
| 266 return '({}, {})'.format(self.stmt, self.e) | |
| 267 | |
| 268 | |
| 269 class Alloc(Expression): | |
| 270 """ Allocates space on the stack """ | |
| 271 def __init__(self): | |
| 272 super().__init__() | |
| 273 | |
| 274 def __repr__(self): | |
| 275 return 'Alloc' | |
| 276 | |
| 277 | |
| 278 class Variable(Expression): | |
| 279 def __init__(self, name): | |
| 280 self.name = name | |
| 281 | |
| 282 def __repr__(self): | |
| 283 return 'Var {}'.format(self.name) | |
| 284 | |
| 285 | |
| 286 class LocalVariable(Variable): | |
| 287 def __repr__(self): | |
| 288 return 'Local {}'.format(self.name) | |
| 289 | |
| 290 | |
| 363 | 291 class GlobalVariable(Variable): |
| 292 def __repr__(self): | |
| 293 return 'Global {}'.format(self.name) | |
| 294 | |
| 295 | |
| 277 | 296 class Parameter(Variable): |
| 297 def __repr__(self): | |
| 298 return 'Param {}'.format(self.name) | |
| 299 | |
| 300 | |
| 301 class Temp(Expression): | |
| 302 """ Temporary storage, same as register """ | |
| 303 def __init__(self, name): | |
| 304 self.name = name | |
| 305 | |
| 306 def __repr__(self): | |
| 307 return 'TMP_{}'.format(self.name) | |
| 308 | |
| 309 | |
| 310 class Mem(Expression): | |
| 305 | 311 """ Memory access """ |
| 277 | 312 def __init__(self, e): |
| 313 self.e = e | |
| 314 | |
| 315 def __repr__(self): | |
| 316 return '[{}]'.format(self.e) | |
| 317 | |
| 318 | |
| 354 | 319 class Addr(Expression): |
| 320 """ Address of label """ | |
| 321 def __init__(self, e): | |
| 322 self.e = e | |
| 323 | |
| 324 def __repr__(self): | |
| 325 return '&{}'.format(self.e) | |
| 326 | |
| 327 | |
| 277 | 328 class Statement: |
| 329 """ Base class for all instructions. """ | |
| 312 | 330 @property |
| 331 def IsTerminator(self): | |
| 332 return isinstance(self, LastStatement) | |
| 277 | 333 |
| 334 | |
| 335 class Move(Statement): | |
| 305 | 336 """ Move source to destination """ |
| 277 | 337 def __init__(self, dst, src): |
| 338 self.dst = dst | |
| 339 self.src = src | |
| 340 | |
| 341 def __repr__(self): | |
| 342 return '{} = {}'.format(self.dst, self.src) | |
| 343 | |
| 344 | |
| 345 class Exp(Statement): | |
| 346 def __init__(self, e): | |
| 347 self.e = e | |
| 348 | |
| 349 def __repr__(self): | |
| 350 return '{}'.format(self.e) | |
| 351 | |
| 352 | |
| 353 # Branching: | |
| 354 class LastStatement(Statement): | |
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355 def changeTarget(self, old, new): |
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356 idx = self.Targets.index(old) |
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357 self.Targets[idx] = new |
| 277 | 358 |
| 359 | |
| 360 class Terminator(LastStatement): | |
| 361 """ Instruction that terminates the terminal block """ | |
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362 def __init__(self): |
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363 self.Targets = [] |
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364 |
| 277 | 365 def __repr__(self): |
| 366 return 'Terminator' | |
| 367 | |
| 368 | |
| 369 class Jump(LastStatement): | |
| 304 | 370 """ Jump statement to some target location """ |
| 277 | 371 def __init__(self, target): |
| 372 self.Targets = [target] | |
| 373 | |
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374 def setTarget(self, t): |
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375 self.Targets[0] = t |
| 310 | 376 |
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377 target = property(lambda s: s.Targets[0], setTarget) |
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378 |
| 277 | 379 def __repr__(self): |
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380 return 'JUMP {}'.format(self.target.name) |
| 277 | 381 |
| 382 | |
| 383 class CJump(LastStatement): | |
| 305 | 384 """ Conditional jump to true or false labels. """ |
| 277 | 385 conditions = ['==', '<', '>', '>=', '<=', '!='] |
| 305 | 386 |
| 277 | 387 def __init__(self, a, cond, b, lab_yes, lab_no): |
| 305 | 388 assert cond in CJump.conditions |
| 277 | 389 self.a = a |
| 390 self.cond = cond | |
| 391 self.b = b | |
| 392 self.Targets = [lab_yes, lab_no] | |
| 393 | |
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394 lab_yes = property(lambda s: s.Targets[0]) |
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395 lab_no = property(lambda s: s.Targets[1]) |
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396 |
| 277 | 397 def __repr__(self): |
| 305 | 398 return 'IF {} {} {} THEN {} ELSE {}'\ |
| 399 .format(self.a, self.cond, self.b, self.lab_yes, self.lab_no) |