Linter Demo

Errors: 0

Warnings: 3

File: /home/fstrocco/Dart/dart/benchmark/compiler/lib/src/ssa/ssa_tracer.dart

// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. library ssa.tracer; import 'dart:async' show EventSink; import 'ssa.dart'; import '../js_backend/js_backend.dart'; import '../dart2jslib.dart'; import '../tracer.dart'; /** * Outputs SSA code in a format readable by Hydra IR. * Tracing is disabled by default, see ../tracer.dart for how * to enable it. */ class HTracer extends HGraphVisitor with TracerUtil { Compiler compiler; JavaScriptItemCompilationContext context; final EventSink<String> output; HTracer(this.output, this.compiler, this.context); void traceGraph(String name, HGraph graph) { DEBUG_MODE = true; tag("cfg", () { printProperty("name", name); visitDominatorTree(graph); }); } void addPredecessors(HBasicBlock block) { if (block.predecessors.isEmpty) { printEmptyProperty("predecessors"); } else { addIndent(); add("predecessors"); for (HBasicBlock predecessor in block.predecessors) { add(' "B${predecessor.id}"'); } add("\n"); } } void addSuccessors(HBasicBlock block) { if (block.successors.isEmpty) { printEmptyProperty("successors"); } else { addIndent(); add("successors"); for (HBasicBlock successor in block.successors) { add(' "B${successor.id}"'); } add("\n"); } } void addInstructions(HInstructionStringifier stringifier, HInstructionList list) { for (HInstruction instruction = list.first; instruction != null; instruction = instruction.next) { int bci = 0; int uses = instruction.usedBy.length; String changes = instruction.sideEffects.hasSideEffects() ? '!' : ' '; String depends = instruction.sideEffects.dependsOnSomething() ? '?' : ''; addIndent(); String temporaryId = stringifier.temporaryId(instruction); String instructionString = stringifier.visit(instruction); add("$bci $uses $temporaryId $instructionString $changes $depends <|@\n"); } } void visitBasicBlock(HBasicBlock block) { HInstructionStringifier stringifier = new HInstructionStringifier(context, block, compiler); assert(block.id != null); tag("block", () { printProperty("name", "B${block.id}"); printProperty("from_bci", -1); printProperty("to_bci", -1); addPredecessors(block); addSuccessors(block); printEmptyProperty("xhandlers"); printEmptyProperty("flags"); if (block.dominator != null) { printProperty("dominator", "B${block.dominator.id}"); } tag("states", () { tag("locals", () { printProperty("size", 0); printProperty("method", "None"); block.forEachPhi((phi) { String phiId = stringifier.temporaryId(phi); StringBuffer inputIds = new StringBuffer(); for (int i = 0; i < phi.inputs.length; i++) { inputIds.write(stringifier.temporaryId(phi.inputs[i])); inputIds.write(" "); } println("${phi.id} $phiId [ $inputIds]"); }); }); }); tag("HIR", () { addInstructions(stringifier, block.phis); addInstructions(stringifier, block); }); }); } } class HInstructionStringifier implements HVisitor<String> { final Compiler compiler; final JavaScriptItemCompilationContext context; final HBasicBlock currentBlock; HInstructionStringifier(this.context, this.currentBlock, this.compiler); visit(HInstruction node) => '${node.accept(this)} ${node.instructionType}'; String temporaryId(HInstruction instruction) { String prefix; if (instruction.isNull()) { prefix = 'u'; } else if (instruction.isConflicting()) { prefix = 'c'; } else if (instruction.isExtendableArray(compiler)) { prefix = 'e'; } else if (instruction.isFixedArray(compiler)) { prefix = 'f'; } else if (instruction.isMutableArray(compiler)) { prefix = 'm'; } else if (instruction.isReadableArray(compiler)) { prefix = 'a'; } else if (instruction.isString(compiler)) { prefix = 's'; } else if (instruction.isIndexablePrimitive(compiler)) { prefix = 'r'; } else if (instruction.isBoolean(compiler)) { prefix = 'b'; } else if (instruction.isInteger(compiler)) { prefix = 'i'; } else if (instruction.isDouble(compiler)) { prefix = 'd'; } else if (instruction.isNumber(compiler)) { prefix = 'n'; } else if (instruction.instructionType.containsAll(compiler.world)) { prefix = 'v'; } else { prefix = 'U'; } return "$prefix${instruction.id}"; } String visitBoolify(HBoolify node) { return "Boolify: ${temporaryId(node.inputs[0])}"; } String handleInvokeBinary(HInvokeBinary node, String op) { String left = temporaryId(node.left); String right= temporaryId(node.right); return '$left $op $right'; } String visitAdd(HAdd node) => handleInvokeBinary(node, '+'); String visitBitAnd(HBitAnd node) => handleInvokeBinary(node, '&'); String visitBitNot(HBitNot node) { String operand = temporaryId(node.operand); return "~$operand"; } String visitBitOr(HBitOr node) => handleInvokeBinary(node, '|'); String visitBitXor(HBitXor node) => handleInvokeBinary(node, '^'); String visitBoundsCheck(HBoundsCheck node) { String lengthId = temporaryId(node.length); String indexId = temporaryId(node.index); return "Bounds check: length = $lengthId, index = $indexId"; } String visitBreak(HBreak node) { HBasicBlock target = currentBlock.successors[0]; if (node.label != null) { return "Break ${node.label.labelName}: (B${target.id})"; } return "Break: (B${target.id})"; } String visitConstant(HConstant constant) => "Constant ${constant.constant}"; String visitContinue(HContinue node) { HBasicBlock target = currentBlock.successors[0]; if (node.label != null) { return "Continue ${node.label.labelName}: (B${target.id})"; } return "Continue: (B${target.id})"; } String visitDivide(HDivide node) => handleInvokeBinary(node, '/'); String visitExit(HExit node) => "exit"; String visitFieldGet(HFieldGet node) { if (node.isNullCheck) { return 'null check on ${temporaryId(node.receiver)}'; } String fieldName = node.element.name; return 'field get ${temporaryId(node.receiver)}.$fieldName'; } String visitFieldSet(HFieldSet node) { String valueId = temporaryId(node.value); String fieldName = node.element.name; return 'field set ${temporaryId(node.receiver)}.$fieldName to $valueId'; } String visitReadModifyWrite(HReadModifyWrite node) { String fieldName = node.element.name; String receiverId = temporaryId(node.receiver); String op = node.jsOp; if (node.isAssignOp) { String valueId = temporaryId(node.value); return 'field-update $receiverId.$fieldName $op= $valueId'; } else if (node.isPreOp) { return 'field-update $op$receiverId.$fieldName'; } else { return 'field-update $receiverId.$fieldName$op'; } } String visitLocalGet(HLocalGet node) { String localName = node.variable.name; return 'local get ${temporaryId(node.local)}.$localName'; } String visitLocalSet(HLocalSet node) { String valueId = temporaryId(node.value); String localName = node.variable.name; return 'local set ${temporaryId(node.local)}.$localName to $valueId'; } String visitGoto(HGoto node) { HBasicBlock target = currentBlock.successors[0]; return "Goto: (B${target.id})"; } String visitGreater(HGreater node) => handleInvokeBinary(node, '>'); String visitGreaterEqual(HGreaterEqual node) { return handleInvokeBinary(node, '>='); } String visitIdentity(HIdentity node) => handleInvokeBinary(node, '==='); String visitIf(HIf node) { HBasicBlock thenBlock = currentBlock.successors[0]; HBasicBlock elseBlock = currentBlock.successors[1]; String conditionId = temporaryId(node.inputs[0]); return "If ($conditionId): (B${thenBlock.id}) else (B${elseBlock.id})"; } String visitGenericInvoke(String invokeType, String functionName, List<HInstruction> arguments) { StringBuffer argumentsString = new StringBuffer(); for (int i = 0; i < arguments.length; i++) { if (i != 0) argumentsString.write(", "); argumentsString.write(temporaryId(arguments[i])); } return "$invokeType: $functionName($argumentsString)"; } String visitIndex(HIndex node) { String receiver = temporaryId(node.receiver); String index = temporaryId(node.index); return "Index: $receiver[$index]"; } String visitIndexAssign(HIndexAssign node) { String receiver = temporaryId(node.receiver); String index = temporaryId(node.index); String value = temporaryId(node.value); return "IndexAssign: $receiver[$index] = $value"; } String visitInterceptor(HInterceptor node) { String value = temporaryId(node.inputs[0]); if (node.interceptedClasses != null) { JavaScriptBackend backend = compiler.backend; String cls = backend.namer.suffixForGetInterceptor(node.interceptedClasses); return "Intercept ($cls): $value"; } return "Intercept: $value"; } String visitInvokeClosure(HInvokeClosure node) => visitInvokeDynamic(node, "closure"); String visitInvokeDynamic(HInvokeDynamic invoke, String kind) { String receiver = temporaryId(invoke.receiver); String name = invoke.selector.name; String target = "($kind) $receiver.$name"; int offset = HInvoke.ARGUMENTS_OFFSET; List arguments = invoke.inputs.sublist(offset); return visitGenericInvoke("Invoke", target, arguments) + "(${invoke.selector.mask})"; } String visitInvokeDynamicMethod(HInvokeDynamicMethod node) => visitInvokeDynamic(node, "method"); String visitInvokeDynamicGetter(HInvokeDynamicGetter node) => visitInvokeDynamic(node, "get"); String visitInvokeDynamicSetter(HInvokeDynamicSetter node) => visitInvokeDynamic(node, "set"); String visitInvokeStatic(HInvokeStatic invoke) { String target = invoke.element.name; return visitGenericInvoke("Invoke", target, invoke.inputs); } String visitInvokeSuper(HInvokeSuper invoke) { String target = invoke.element.name; return visitGenericInvoke("Invoke super", target, invoke.inputs); } String visitInvokeConstructorBody(HInvokeConstructorBody invoke) { String target = invoke.element.name; return visitGenericInvoke("Invoke constructor body", target, invoke.inputs); } String visitForeignCode(HForeignCode foreign) { return visitGenericInvoke("Foreign", "${foreign.codeTemplate.ast}", foreign.inputs); } String visitForeignNew(HForeignNew node) { return visitGenericInvoke("New", "${node.element.name}", node.inputs); } String visitLess(HLess node) => handleInvokeBinary(node, '<'); String visitLessEqual(HLessEqual node) => handleInvokeBinary(node, '<='); String visitLiteralList(HLiteralList node) { StringBuffer elementsString = new StringBuffer(); for (int i = 0; i < node.inputs.length; i++) { if (i != 0) elementsString.write(", "); elementsString.write(temporaryId(node.inputs[i])); } return "Literal list: [$elementsString]"; } String visitLoopBranch(HLoopBranch branch) { HBasicBlock bodyBlock = currentBlock.successors[0]; HBasicBlock exitBlock = currentBlock.successors[1]; String conditionId = temporaryId(branch.inputs[0]); return "While ($conditionId): (B${bodyBlock.id}) then (B${exitBlock.id})"; } String visitMultiply(HMultiply node) => handleInvokeBinary(node, '*'); String visitNegate(HNegate node) { String operand = temporaryId(node.operand); return "-$operand"; } String visitNot(HNot node) => "Not: ${temporaryId(node.inputs[0])}"; String visitParameterValue(HParameterValue node) { return "p${node.sourceElement.name}"; } String visitLocalValue(HLocalValue node) { return "l${node.sourceElement.name}"; } String visitPhi(HPhi phi) { StringBuffer buffer = new StringBuffer(); buffer.write("Phi("); for (int i = 0; i < phi.inputs.length; i++) { if (i > 0) buffer.write(", "); buffer.write(temporaryId(phi.inputs[i])); } buffer.write(")"); return buffer.toString(); } String visitReturn(HReturn node) => "Return ${temporaryId(node.inputs[0])}"; String visitShiftLeft(HShiftLeft node) => handleInvokeBinary(node, '<<'); String visitShiftRight(HShiftRight node) => handleInvokeBinary(node, '>>'); String visitStatic(HStatic node) => "Static ${node.element.name}"; String visitLazyStatic(HLazyStatic node) => "LazyStatic ${node.element.name}"; String visitOneShotInterceptor(HOneShotInterceptor node) => visitInvokeDynamic(node, "one shot interceptor"); String visitStaticStore(HStaticStore node) { String lhs = node.element.name; return "Static $lhs = ${temporaryId(node.inputs[0])}"; } String visitStringConcat(HStringConcat node) { var leftId = temporaryId(node.left); var rightId = temporaryId(node.right); return "StringConcat: $leftId + $rightId"; } String visitStringify(HStringify node) { return "Stringify ${temporaryId(node.inputs[0])}"; } String visitSubtract(HSubtract node) => handleInvokeBinary(node, '-'); String visitSwitch(HSwitch node) { StringBuffer buf = new StringBuffer(); buf.write("Switch: ("); buf.write(temporaryId(node.inputs[0])); buf.write(") "); for (int i = 1; i < node.inputs.length; i++) { buf.write(temporaryId(node.inputs[i])); buf.write(": B"); buf.write(node.block.successors[i - 1].id); buf.write(", "); } buf.write("default: B"); buf.write(node.defaultTarget.id); return buf.toString(); } String visitThis(HThis node) => "this"; String visitThrow(HThrow node) => "Throw ${temporaryId(node.inputs[0])}"; String visitThrowExpression(HThrowExpression node) { return "ThrowExpression ${temporaryId(node.inputs[0])}"; } String visitTruncatingDivide(HTruncatingDivide node) { return handleInvokeBinary(node, '~/'); } String visitExitTry(HExitTry node) { return "Exit try"; } String visitTry(HTry node) { List<HBasicBlock> successors = currentBlock.successors; String tryBlock = 'B${successors[0].id}'; String catchBlock = 'none'; if (node.catchBlock != null) { catchBlock = 'B${successors[1].id}'; } String finallyBlock = 'none'; if (node.finallyBlock != null) { finallyBlock = 'B${node.finallyBlock.id}'; } return "Try: $tryBlock, Catch: $catchBlock, Finally: $finallyBlock, " "Join: B${successors.last.id}"; } String visitIs(HIs node) { String type = node.typeExpression.toString(); return "TypeTest: ${temporaryId(node.expression)} is $type"; } String visitIsViaInterceptor(HIsViaInterceptor node) { String type = node.typeExpression.toString(); return "TypeTest: ${temporaryId(node.inputs[0])} is $type"; } String visitTypeConversion(HTypeConversion node) { assert(node.inputs.length <= 2); String otherInput = (node.inputs.length == 2) ? temporaryId(node.inputs[1]) : ''; return "TypeConversion: ${temporaryId(node.checkedInput)} to " "${node.instructionType} $otherInput"; } String visitTypeKnown(HTypeKnown node) { assert(node.inputs.length <= 2); String result = "TypeKnown: ${temporaryId(node.checkedInput)} is ${node.knownType}"; if (node.witness != null) { result += " witnessed by ${temporaryId(node.witness)}"; } return result; } String visitRangeConversion(HRangeConversion node) { return "RangeConversion: ${node.checkedInput}"; } String visitReadTypeVariable(HReadTypeVariable node) { return "ReadTypeVariable: ${node.dartType} ${node.hasReceiver}"; } String visitFunctionType(HFunctionType node) { return "FunctionType: ${node.dartType}"; } String visitVoidType(HVoidType node) { return "VoidType"; } String visitInterfaceType(HInterfaceType node) { return "InterfaceType: ${node.dartType}"; } String visitDynamicType(HDynamicType node) { return "DynamicType"; } String visitAwait(HAwait node) { return "await ${temporaryId(node.inputs[0])}"; } String visitYield(HYield node) { return "yield${node.hasStar ? "*" : ""} ${temporaryId(node.inputs[0])}"; } }