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extracted PseudocodeVariableDataCollector

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This commit is contained in:
Svetlana Isakova
2014-02-21 22:47:34 +04:00
parent 77bc6c44a1
commit b79df51dab
3 changed files with 145 additions and 103 deletions
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compiler/frontend/src/org/jetbrains/jet/lang/cfg/PseudocodeTraverser.java
+6 -101
View File
@@ -36,26 +36,26 @@ public class PseudocodeTraverser {
}
@NotNull
private static Instruction getStartInstruction(@NotNull Pseudocode pseudocode, @NotNull TraversalOrder traversalOrder) {
/*package*/ static Instruction getStartInstruction(@NotNull Pseudocode pseudocode, @NotNull TraversalOrder traversalOrder) {
return traversalOrder == FORWARD ? pseudocode.getEnterInstruction() : pseudocode.getSinkInstruction();
}
@NotNull
private static Instruction getLastInstruction(@NotNull Pseudocode pseudocode, @NotNull TraversalOrder traversalOrder) {
/*package*/ static Instruction getLastInstruction(@NotNull Pseudocode pseudocode, @NotNull TraversalOrder traversalOrder) {
return traversalOrder == FORWARD ? pseudocode.getSinkInstruction() : pseudocode.getEnterInstruction();
}
@NotNull
private static List<Instruction> getInstructions(@NotNull Pseudocode pseudocode, @NotNull TraversalOrder traversalOrder) {
/*package*/ static List<Instruction> getInstructions(@NotNull Pseudocode pseudocode, @NotNull TraversalOrder traversalOrder) {
return traversalOrder == FORWARD ? pseudocode.getInstructions() : pseudocode.getReversedInstructions();
}
@NotNull
private static Collection<Instruction> getPreviousInstruction(@NotNull Instruction instruction, @NotNull TraversalOrder traversalOrder) {
/*packge*/ static Collection<Instruction> getPreviousInstruction(@NotNull Instruction instruction, @NotNull TraversalOrder traversalOrder) {
return traversalOrder == FORWARD ? instruction.getPreviousInstructions() : instruction.getNextInstructions();
}
private static boolean isStartInstruction(@NotNull Instruction instruction, @NotNull TraversalOrder traversalOrder) {
/*package*/ static boolean isStartInstruction(@NotNull Instruction instruction, @NotNull TraversalOrder traversalOrder) {
return traversalOrder == FORWARD ? instruction instanceof SubroutineEnterInstruction
: instruction instanceof SubroutineSinkInstruction;
}
@@ -65,105 +65,10 @@ public class PseudocodeTraverser {
SKIP_LOCAL_DECLARATIONS
}
private static boolean shouldLookInside(Instruction instruction, LookInsideStrategy lookInside) {
protected static boolean shouldLookInside(Instruction instruction, LookInsideStrategy lookInside) {
return lookInside == LookInsideStrategy.ANALYSE_LOCAL_DECLARATIONS && instruction instanceof LocalFunctionDeclarationInstruction;
}
public static <D> Map<Instruction, Edges<D>> collectData(
@NotNull Pseudocode pseudocode,
@NotNull TraversalOrder traversalOrder,
@NotNull LookInsideStrategy lookInside,
@NotNull D initialDataValue,
@NotNull D initialDataValueForEnterInstruction,
@NotNull InstructionDataMergeStrategy<D> instructionDataMergeStrategy
) {
Map<Instruction, Edges<D>> edgesMap = Maps.newLinkedHashMap();
initializeEdgesMap(pseudocode, lookInside, edgesMap, initialDataValue);
edgesMap.put(getStartInstruction(pseudocode, traversalOrder), Edges.create(initialDataValueForEnterInstruction, initialDataValueForEnterInstruction));
boolean[] changed = new boolean[1];
changed[0] = true;
while (changed[0]) {
changed[0] = false;
collectDataFromSubgraph(pseudocode, traversalOrder, lookInside, edgesMap, instructionDataMergeStrategy,
Collections.<Instruction>emptyList(), changed, false);
}
return edgesMap;
}
private static <D> void initializeEdgesMap(
@NotNull Pseudocode pseudocode, LookInsideStrategy lookInside,
@NotNull Map<Instruction, Edges<D>> edgesMap,
@NotNull D initialDataValue) {
List<Instruction> instructions = pseudocode.getInstructions();
Edges<D> initialEdge = Edges.create(initialDataValue, initialDataValue);
for (Instruction instruction : instructions) {
edgesMap.put(instruction, initialEdge);
if (shouldLookInside(instruction, lookInside)) {
initializeEdgesMap(((LocalFunctionDeclarationInstruction) instruction).getBody(), lookInside, edgesMap, initialDataValue);
}
}
}
private static <D> void collectDataFromSubgraph(
@NotNull Pseudocode pseudocode,
@NotNull TraversalOrder traversalOrder,
@NotNull LookInsideStrategy lookInside,
@NotNull Map<Instruction, Edges<D>> edgesMap,
@NotNull InstructionDataMergeStrategy<D> instructionDataMergeStrategy,
@NotNull Collection<Instruction> previousSubGraphInstructions,
boolean[] changed,
boolean isLocal
) {
List<Instruction> instructions = getInstructions(pseudocode, traversalOrder);
Instruction startInstruction = getStartInstruction(pseudocode, traversalOrder);
for (Instruction instruction : instructions) {
boolean isStart = isStartInstruction(instruction, traversalOrder);
if (!isLocal && isStart) continue;
Collection<Instruction> allPreviousInstructions;
Collection<Instruction> previousInstructions = getPreviousInstruction(instruction, traversalOrder);
if (instruction == startInstruction && !previousSubGraphInstructions.isEmpty()) {
allPreviousInstructions = Lists.newArrayList(previousInstructions);
allPreviousInstructions.addAll(previousSubGraphInstructions);
}
else {
allPreviousInstructions = previousInstructions;
}
if (shouldLookInside(instruction, lookInside)) {
Pseudocode subroutinePseudocode = ((LocalFunctionDeclarationInstruction) instruction).getBody();
collectDataFromSubgraph(subroutinePseudocode, traversalOrder, lookInside, edgesMap, instructionDataMergeStrategy,
previousInstructions, changed, true);
Instruction lastInstruction = getLastInstruction(subroutinePseudocode, traversalOrder);
Edges<D> previousValue = edgesMap.get(instruction);
Edges<D> newValue = edgesMap.get(lastInstruction);
if (!previousValue.equals(newValue)) {
changed[0] = true;
edgesMap.put(instruction, newValue);
}
continue;
}
Edges<D> previousDataValue = edgesMap.get(instruction);
Collection<D> incomingEdgesData = Sets.newHashSet();
for (Instruction previousInstruction : allPreviousInstructions) {
Edges<D> previousData = edgesMap.get(previousInstruction);
if (previousData != null) {
incomingEdgesData.add(previousData.out);
}
}
Edges<D> mergedData = instructionDataMergeStrategy.execute(instruction, incomingEdgesData);
if (!mergedData.equals(previousDataValue)) {
changed[0] = true;
edgesMap.put(instruction, mergedData);
}
}
}
public static void traverse(
@NotNull Pseudocode pseudocode,
compiler/frontend/src/org/jetbrains/jet/lang/cfg/PseudocodeVariableDataCollector.java
+137
View File
@@ -0,0 +1,137 @@
/*
* Copyright 2010-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.jet.lang.cfg;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.jet.lang.cfg.pseudocode.Instruction;
import org.jetbrains.jet.lang.cfg.pseudocode.LocalFunctionDeclarationInstruction;
import org.jetbrains.jet.lang.cfg.pseudocode.Pseudocode;
import org.jetbrains.jet.lang.resolve.BindingContext;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class PseudocodeVariableDataCollector extends PseudocodeTraverser {
private final BindingContext bindingContext;
public PseudocodeVariableDataCollector(@NotNull BindingContext context) {
bindingContext = context;
}
public <D> Map<Instruction, Edges<D>> collectData(
@NotNull Pseudocode pseudocode,
@NotNull TraversalOrder traversalOrder,
@NotNull LookInsideStrategy lookInside,
@NotNull D initialDataValue,
@NotNull D initialDataValueForEnterInstruction,
@NotNull InstructionDataMergeStrategy<D> instructionDataMergeStrategy
) {
Map<Instruction, Edges<D>> edgesMap = Maps.newLinkedHashMap();
initializeEdgesMap(pseudocode, lookInside, edgesMap, initialDataValue);
edgesMap.put(getStartInstruction(pseudocode, traversalOrder), Edges.create(initialDataValueForEnterInstruction, initialDataValueForEnterInstruction));
boolean[] changed = new boolean[1];
changed[0] = true;
while (changed[0]) {
changed[0] = false;
collectDataFromSubgraph(pseudocode, traversalOrder, lookInside, edgesMap, instructionDataMergeStrategy,
Collections.<Instruction>emptyList(), changed, false);
}
return edgesMap;
}
private <D> void initializeEdgesMap(
@NotNull Pseudocode pseudocode, LookInsideStrategy lookInside,
@NotNull Map<Instruction, Edges<D>> edgesMap,
@NotNull D initialDataValue) {
List<Instruction> instructions = pseudocode.getInstructions();
Edges<D> initialEdge = Edges.create(initialDataValue, initialDataValue);
for (Instruction instruction : instructions) {
edgesMap.put(instruction, initialEdge);
if (shouldLookInside(instruction, lookInside)) {
initializeEdgesMap(((LocalFunctionDeclarationInstruction) instruction).getBody(), lookInside, edgesMap, initialDataValue);
}
}
}
private <D> void collectDataFromSubgraph(
@NotNull Pseudocode pseudocode,
@NotNull TraversalOrder traversalOrder,
@NotNull LookInsideStrategy lookInside,
@NotNull Map<Instruction, Edges<D>> edgesMap,
@NotNull InstructionDataMergeStrategy<D> instructionDataMergeStrategy,
@NotNull Collection<Instruction> previousSubGraphInstructions,
boolean[] changed,
boolean isLocal
) {
List<Instruction> instructions = getInstructions(pseudocode, traversalOrder);
Instruction startInstruction = getStartInstruction(pseudocode, traversalOrder);
for (Instruction instruction : instructions) {
boolean isStart = isStartInstruction(instruction, traversalOrder);
if (!isLocal && isStart) continue;
Collection<Instruction> allPreviousInstructions;
Collection<Instruction> previousInstructions = getPreviousInstruction(instruction, traversalOrder);
if (instruction == startInstruction && !previousSubGraphInstructions.isEmpty()) {
allPreviousInstructions = Lists.newArrayList(previousInstructions);
allPreviousInstructions.addAll(previousSubGraphInstructions);
}
else {
allPreviousInstructions = previousInstructions;
}
if (shouldLookInside(instruction, lookInside)) {
LocalFunctionDeclarationInstruction functionInstruction = (LocalFunctionDeclarationInstruction) instruction;
Pseudocode subroutinePseudocode = functionInstruction.getBody();
collectDataFromSubgraph(subroutinePseudocode, traversalOrder, lookInside, edgesMap, instructionDataMergeStrategy,
previousInstructions,
changed, true);
Instruction lastInstruction = getLastInstruction(subroutinePseudocode, traversalOrder);
Edges<D> previousValue = edgesMap.get(instruction);
Edges<D> newValue = edgesMap.get(lastInstruction);
if (!previousValue.equals(newValue)) {
changed[0] = true;
edgesMap.put(instruction, newValue);
}
continue;
}
Edges<D> previousDataValue = edgesMap.get(instruction);
Collection<D> incomingEdgesData = Sets.newHashSet();
for (Instruction previousInstruction : allPreviousInstructions) {
Edges<D> previousData = edgesMap.get(previousInstruction);
if (previousData != null) {
incomingEdgesData.add(previousData.out);
}
}
Edges<D> mergedData = instructionDataMergeStrategy.execute(instruction, incomingEdgesData);
if (!mergedData.equals(previousDataValue)) {
changed[0] = true;
edgesMap.put(instruction, mergedData);
}
}
}
}
compiler/frontend/src/org/jetbrains/jet/lang/cfg/PseudocodeVariablesData.java
+2 -2
View File
@@ -147,7 +147,7 @@ public class PseudocodeVariablesData {
}
};
return PseudocodeTraverser.collectData(
return new PseudocodeVariableDataCollector(bindingContext).collectData(
pseudocode, FORWARD, ANALYSE_LOCAL_DECLARATIONS,
initialMap, initialMap, instructionDataMergeStrategy);
}
@@ -273,7 +273,7 @@ public class PseudocodeVariablesData {
return Edges.create(enterResult, exitResult);
}
};
return PseudocodeTraverser.collectData(
return new PseudocodeVariableDataCollector(bindingContext).collectData(
pseudocode, BACKWARD, ANALYSE_LOCAL_DECLARATIONS, Collections.<VariableDescriptor, VariableUseState>emptyMap(),
sinkInstructionData, collectVariableUseStatusStrategy);
}