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Start creating WASM expression generator
This commit is contained in:
Alexey Andreev
parent
8c08136c9a
commit
5f2019a9b6
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@ -0,0 +1,240 @@
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/*
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* Copyright 2016 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.teavm.wasm.decompile;
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import org.teavm.model.InvokeDynamicInstruction;
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import org.teavm.model.instructions.ArrayLengthInstruction;
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import org.teavm.model.instructions.AssignInstruction;
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import org.teavm.model.instructions.BinaryBranchingInstruction;
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import org.teavm.model.instructions.BinaryInstruction;
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import org.teavm.model.instructions.BranchingInstruction;
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import org.teavm.model.instructions.CastInstruction;
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import org.teavm.model.instructions.CastIntegerInstruction;
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import org.teavm.model.instructions.CastNumberInstruction;
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import org.teavm.model.instructions.ClassConstantInstruction;
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import org.teavm.model.instructions.CloneArrayInstruction;
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import org.teavm.model.instructions.ConstructArrayInstruction;
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import org.teavm.model.instructions.ConstructInstruction;
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import org.teavm.model.instructions.ConstructMultiArrayInstruction;
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import org.teavm.model.instructions.DoubleConstantInstruction;
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import org.teavm.model.instructions.EmptyInstruction;
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import org.teavm.model.instructions.ExitInstruction;
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import org.teavm.model.instructions.FloatConstantInstruction;
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import org.teavm.model.instructions.GetElementInstruction;
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import org.teavm.model.instructions.GetFieldInstruction;
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import org.teavm.model.instructions.InitClassInstruction;
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import org.teavm.model.instructions.InstructionVisitor;
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import org.teavm.model.instructions.IntegerConstantInstruction;
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import org.teavm.model.instructions.InvokeInstruction;
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import org.teavm.model.instructions.IsInstanceInstruction;
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import org.teavm.model.instructions.JumpInstruction;
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import org.teavm.model.instructions.LongConstantInstruction;
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import org.teavm.model.instructions.MonitorEnterInstruction;
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import org.teavm.model.instructions.MonitorExitInstruction;
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import org.teavm.model.instructions.NegateInstruction;
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import org.teavm.model.instructions.NullCheckInstruction;
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import org.teavm.model.instructions.NullConstantInstruction;
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import org.teavm.model.instructions.PutElementInstruction;
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import org.teavm.model.instructions.PutFieldInstruction;
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import org.teavm.model.instructions.RaiseInstruction;
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import org.teavm.model.instructions.StringConstantInstruction;
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import org.teavm.model.instructions.SwitchInstruction;
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import org.teavm.model.instructions.UnwrapArrayInstruction;
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public class DecompilationVisitor implements InstructionVisitor {
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@Override
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public void visit(EmptyInstruction insn) {
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}
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@Override
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public void visit(ClassConstantInstruction insn) {
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}
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@Override
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public void visit(NullConstantInstruction insn) {
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}
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@Override
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public void visit(IntegerConstantInstruction insn) {
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}
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@Override
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public void visit(LongConstantInstruction insn) {
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}
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@Override
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public void visit(FloatConstantInstruction insn) {
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}
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@Override
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public void visit(DoubleConstantInstruction insn) {
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}
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@Override
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public void visit(StringConstantInstruction insn) {
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}
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@Override
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public void visit(BinaryInstruction insn) {
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}
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@Override
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public void visit(NegateInstruction insn) {
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}
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@Override
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public void visit(AssignInstruction insn) {
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}
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@Override
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public void visit(CastInstruction insn) {
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}
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@Override
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public void visit(CastNumberInstruction insn) {
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}
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@Override
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public void visit(CastIntegerInstruction insn) {
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}
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@Override
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public void visit(BranchingInstruction insn) {
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}
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@Override
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public void visit(BinaryBranchingInstruction insn) {
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}
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@Override
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public void visit(JumpInstruction insn) {
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}
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@Override
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public void visit(SwitchInstruction insn) {
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}
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@Override
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public void visit(ExitInstruction insn) {
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}
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@Override
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public void visit(RaiseInstruction insn) {
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}
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@Override
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public void visit(ConstructArrayInstruction insn) {
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}
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@Override
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public void visit(ConstructInstruction insn) {
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}
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@Override
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public void visit(ConstructMultiArrayInstruction insn) {
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}
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@Override
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public void visit(GetFieldInstruction insn) {
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}
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@Override
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public void visit(PutFieldInstruction insn) {
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}
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@Override
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public void visit(ArrayLengthInstruction insn) {
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}
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@Override
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public void visit(CloneArrayInstruction insn) {
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}
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@Override
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public void visit(UnwrapArrayInstruction insn) {
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}
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@Override
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public void visit(GetElementInstruction insn) {
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}
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@Override
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public void visit(PutElementInstruction insn) {
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}
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@Override
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public void visit(InvokeInstruction insn) {
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}
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@Override
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public void visit(InvokeDynamicInstruction insn) {
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}
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@Override
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public void visit(IsInstanceInstruction insn) {
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}
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@Override
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public void visit(InitClassInstruction insn) {
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}
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@Override
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public void visit(NullCheckInstruction insn) {
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}
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@Override
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public void visit(MonitorEnterInstruction insn) {
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}
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@Override
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public void visit(MonitorExitInstruction insn) {
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}
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}
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135
core/src/main/java/org/teavm/wasm/decompile/WasmDecompiler.java
Normal file
135
core/src/main/java/org/teavm/wasm/decompile/WasmDecompiler.java
Normal file
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@ -0,0 +1,135 @@
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/*
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* Copyright 2016 Alexey Andreev.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.teavm.wasm.decompile;
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import org.teavm.common.DominatorTree;
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import org.teavm.common.Graph;
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import org.teavm.common.GraphUtils;
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import org.teavm.common.Loop;
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import org.teavm.common.LoopGraph;
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import org.teavm.model.Program;
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import org.teavm.model.util.ProgramUtils;
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import org.teavm.wasm.model.expression.WasmBlock;
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import org.teavm.wasm.model.expression.WasmExpression;
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public class WasmDecompiler {
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private Program program;
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private LoopGraph cfg;
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private DominatorTree dom;
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private Graph domGraph;
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private Label[] labels;
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private WasmExpression[] blockExpressions;
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private Step[] stack;
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private int stackTop;
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public void decompile(Program program) {
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this.program = program;
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prepare();
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push(new EnterStep(0));
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run();
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}
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private void prepare() {
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cfg = new LoopGraph(ProgramUtils.buildControlFlowGraph(program));
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dom = GraphUtils.buildDominatorTree(cfg);
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domGraph = GraphUtils.buildDominatorGraph(dom, cfg.size());
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labels = new Label[cfg.size()];
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blockExpressions = new WasmExpression[cfg.size()];
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stack = new Step[cfg.size() * 4];
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}
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private void run() {
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while (stackTop > 0) {
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stack[stackTop--].perform();
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}
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}
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private void push(Step step) {
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stack[stackTop++] = step;
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}
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private class EnterStep implements Step {
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private int index;
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public EnterStep(int index) {
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this.index = index;
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}
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@Override
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public void perform() {
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Loop loop = cfg.loopAt(index);
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if (loop != null && loop.getHead() == index) {
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enterLoop();
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} else if (cfg.outgoingEdgesCount(index) == 1) {
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enterOrdinaryBlock();
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} else {
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enterBranching();
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}
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}
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private void enterLoop() {
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}
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private void enterOrdinaryBlock() {
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}
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private void enterBranching() {
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}
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}
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private class LoopContinueLabel implements Label {
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private int index;
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private WasmBlock wrapper;
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public LoopContinueLabel(int index) {
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this.index = index;
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}
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@Override
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public WasmBlock getTarget() {
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if (wrapper == null) {
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wrapper = new WasmBlock(false);
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wrapper.getBody().add(blockExpressions[index]);
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blockExpressions[index] = wrapper;
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}
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return wrapper;
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}
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}
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private class BreakLabel implements Label {
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private WasmBlock target;
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public BreakLabel(WasmBlock target) {
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this.target = target;
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}
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@Override
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public WasmBlock getTarget() {
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return null;
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}
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}
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private interface Step {
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void perform();
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}
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private interface Label {
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WasmBlock getTarget();
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}
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}
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@ -15,11 +15,14 @@
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*/
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package org.teavm.wasm.model;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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public class WasmModule {
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private Map<String, WasmFunction> functions = new LinkedHashMap<>();
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private List<WasmFunction> functionTable = new ArrayList<>();
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public void add(WasmFunction function) {
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if (functions.containsKey(function.getName())) {
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@ -31,4 +34,8 @@ public class WasmModule {
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functions.put(function.getName(), function);
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function.module = this;
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}
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public List<WasmFunction> getFunctionTable() {
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return functionTable;
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}
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}
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