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566 lines
23 KiB
566 lines
23 KiB
// Copyright (c) 2015 Siegfried Pammer
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection.Metadata;
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using ICSharpCode.Decompiler.TypeSystem;
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using ICSharpCode.Decompiler.Util;
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namespace ICSharpCode.Decompiler.IL.Transforms
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{
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/// <summary>
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/// Transforms array initialization pattern of System.Runtime.CompilerServices.RuntimeHelpers.InitializeArray.
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/// For collection and object initializers see <see cref="TransformCollectionAndObjectInitializers"/>
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/// </summary>
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public class TransformArrayInitializers : IStatementTransform
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{
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StatementTransformContext context;
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void IStatementTransform.Run(Block block, int pos, StatementTransformContext context)
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{
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if (!context.Settings.ArrayInitializers)
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return;
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this.context = context;
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try {
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if (DoTransform(block, pos))
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return;
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if (DoTransformMultiDim(block, pos))
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return;
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if (context.Settings.StackAllocInitializers && DoTransformStackAllocInitializer(block, pos))
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return;
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} finally {
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this.context = null;
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}
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}
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bool DoTransform(Block body, int pos)
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{
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if (pos >= body.Instructions.Count - 2)
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return false;
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ILInstruction inst = body.Instructions[pos];
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if (inst.MatchStLoc(out var v, out var newarrExpr) && MatchNewArr(newarrExpr, out var elementType, out var arrayLength)) {
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if (ForwardScanInitializeArrayRuntimeHelper(body, pos + 1, v, elementType, arrayLength, out var values, out var initArrayPos)) {
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context.Step("ForwardScanInitializeArrayRuntimeHelper", inst);
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var tempStore = context.Function.RegisterVariable(VariableKind.InitializerTarget, v.Type);
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var block = BlockFromInitializer(tempStore, elementType, arrayLength, values);
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body.Instructions[pos] = new StLoc(v, block);
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body.Instructions.RemoveAt(initArrayPos);
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ILInlining.InlineIfPossible(body, pos, context);
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return true;
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}
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if (arrayLength.Length == 1) {
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if (HandleSimpleArrayInitializer(body, pos + 1, v, elementType, arrayLength[0], out values, out var instructionsToRemove)) {
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context.Step("HandleSimpleArrayInitializer", inst);
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var block = new Block(BlockKind.ArrayInitializer);
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var tempStore = context.Function.RegisterVariable(VariableKind.InitializerTarget, v.Type);
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block.Instructions.Add(new StLoc(tempStore, new NewArr(elementType, arrayLength.Select(l => new LdcI4(l)).ToArray())));
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block.Instructions.AddRange(values.SelectWithIndex(
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(i, value) => {
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if (value == null)
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value = GetNullExpression(elementType);
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return StElem(new LdLoc(tempStore), new[] { new LdcI4(i) }, value, elementType);
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}
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));
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block.FinalInstruction = new LdLoc(tempStore);
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body.Instructions[pos] = new StLoc(v, block);
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body.Instructions.RemoveRange(pos + 1, instructionsToRemove);
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ILInlining.InlineIfPossible(body, pos, context);
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return true;
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}
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if (HandleJaggedArrayInitializer(body, pos + 1, v, elementType, arrayLength[0], out ILVariable finalStore, out values, out instructionsToRemove)) {
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context.Step("HandleJaggedArrayInitializer", inst);
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var block = new Block(BlockKind.ArrayInitializer);
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var tempStore = context.Function.RegisterVariable(VariableKind.InitializerTarget, v.Type);
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block.Instructions.Add(new StLoc(tempStore, new NewArr(elementType, arrayLength.Select(l => new LdcI4(l)).ToArray())));
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block.Instructions.AddRange(values.SelectWithIndex((i, value) => StElem(new LdLoc(tempStore), new[] { new LdcI4(i) }, value, elementType)));
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block.FinalInstruction = new LdLoc(tempStore);
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body.Instructions[pos] = new StLoc(finalStore, block);
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body.Instructions.RemoveRange(pos + 1, instructionsToRemove);
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ILInlining.InlineIfPossible(body, pos, context);
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return true;
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}
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}
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}
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return false;
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}
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bool DoTransformMultiDim(Block body, int pos)
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{
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if (pos >= body.Instructions.Count - 2)
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return false;
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ILInstruction instr = body.Instructions[pos];
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if (instr.MatchStLoc(out var v, out var newarrExpr) && MatchNewArr(newarrExpr, out var arrayType, out var length)) {
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if (ForwardScanInitializeArrayRuntimeHelper(body, pos + 1, v, arrayType, length, out var values, out var initArrayPos)) {
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var block = BlockFromInitializer(v, arrayType, length, values);
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body.Instructions[pos].ReplaceWith(new StLoc(v, block));
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body.Instructions.RemoveAt(initArrayPos);
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ILInlining.InlineIfPossible(body, pos, context);
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return true;
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}
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}
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return false;
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}
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bool DoTransformStackAllocInitializer(Block body, int pos)
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{
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if (pos >= body.Instructions.Count - 2)
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return false;
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ILInstruction inst = body.Instructions[pos];
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if (inst.MatchStLoc(out var v, out var locallocExpr) && locallocExpr.MatchLocAlloc(out var lengthInst)) {
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if (lengthInst.MatchLdcI(out var lengthInBytes) && HandleCpblkInitializer(body, pos + 1, v, lengthInBytes, out var blob, out var elementType)) {
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context.Step("HandleCpblkInitializer", inst);
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var block = new Block(BlockKind.StackAllocInitializer);
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var tempStore = context.Function.RegisterVariable(VariableKind.InitializerTarget, new PointerType(elementType));
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block.Instructions.Add(new StLoc(tempStore, new LocAlloc(lengthInst)));
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while (blob.RemainingBytes > 0) {
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block.Instructions.Add(StElemPtr(tempStore, blob.Offset, new LdcI4(blob.ReadByte()), elementType));
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}
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block.FinalInstruction = new LdLoc(tempStore);
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body.Instructions[pos] = new StLoc(v, block);
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body.Instructions.RemoveAt(pos + 1);
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ILInlining.InlineIfPossible(body, pos, context);
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return true;
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}
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if (HandleSequentialLocAllocInitializer(body, pos + 1, v, lengthInst, out elementType, out StObj[] values, out int instructionsToRemove)) {
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context.Step("HandleSequentialLocAllocInitializer", inst);
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var block = new Block(BlockKind.StackAllocInitializer);
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var tempStore = context.Function.RegisterVariable(VariableKind.InitializerTarget, new PointerType(elementType));
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block.Instructions.Add(new StLoc(tempStore, new LocAlloc(lengthInst)));
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block.Instructions.AddRange(values.Where(value => value != null).Select(value => RewrapStore(tempStore, value, elementType)));
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block.FinalInstruction = new LdLoc(tempStore);
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body.Instructions[pos] = new StLoc(v, block);
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body.Instructions.RemoveRange(pos + 1, instructionsToRemove);
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ILInlining.InlineIfPossible(body, pos, context);
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return true;
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}
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}
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return false;
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}
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bool HandleCpblkInitializer(Block block, int pos, ILVariable v, long length, out BlobReader blob, out IType elementType)
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{
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blob = default;
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elementType = null;
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if (!block.Instructions[pos].MatchCpblk(out var dest, out var src, out var size))
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return false;
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if (!dest.MatchLdLoc(v) || !src.MatchLdsFlda(out var field) || !size.MatchLdcI4((int)length))
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return false;
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if (field.MetadataToken.IsNil)
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return false;
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if (!block.Instructions[pos + 1].MatchStLoc(out var finalStore, out var value))
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return false;
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if (!value.MatchLdLoc(v))
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return false;
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var fd = context.PEFile.Metadata.GetFieldDefinition((FieldDefinitionHandle)field.MetadataToken);
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if (!fd.HasFlag(System.Reflection.FieldAttributes.HasFieldRVA))
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return false;
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blob = fd.GetInitialValue(context.PEFile.Reader, context.TypeSystem);
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elementType = ((PointerType)finalStore.Type).ElementType;
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return true;
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}
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bool HandleSequentialLocAllocInitializer(Block block, int pos, ILVariable store, ILInstruction lengthInstruction, out IType elementType, out StObj[] values, out int instructionsToRemove)
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{
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int elementCount = 0;
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long minExpectedOffset = 0;
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values = null;
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elementType = null;
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instructionsToRemove = 0;
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if (block.Instructions[pos].MatchInitblk(out var dest, out var value, out var size)
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&& lengthInstruction.MatchLdcI(out long byteCount))
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{
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if (!dest.MatchLdLoc(store) || !value.MatchLdcI4(0) || !size.MatchLdcI(byteCount))
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return false;
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instructionsToRemove++;
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pos++;
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}
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for (int i = pos; i < block.Instructions.Count; i++) {
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// match the basic stobj pattern
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if (!block.Instructions[i].MatchStObj(out ILInstruction target, out value, out var currentType)
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|| value.Descendants.OfType<IInstructionWithVariableOperand>().Any(inst => inst.Variable == store))
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break;
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if (elementType != null && !currentType.Equals(elementType))
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break;
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elementType = currentType;
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// match the target
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// should be either ldloc store (at offset 0)
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// or binary.add(ldloc store, offset) where offset is either 'elementSize' or 'i * elementSize'
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if (!target.MatchLdLoc(store)) {
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if (!target.MatchBinaryNumericInstruction(BinaryNumericOperator.Add, out var left, out var right))
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return false;
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if (!left.MatchLdLoc(store))
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break;
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var offsetInst = PointerArithmeticOffset.Detect(right, new PointerType(elementType), ((BinaryNumericInstruction)target).CheckForOverflow);
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if (offsetInst == null)
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return false;
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if (!offsetInst.MatchLdcI(out long offset) || offset < 0 || offset < minExpectedOffset)
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break;
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minExpectedOffset = offset;
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}
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if (values == null) {
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var countInstruction = PointerArithmeticOffset.Detect(lengthInstruction, new PointerType(elementType), checkForOverflow: true);
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if (countInstruction == null || !countInstruction.MatchLdcI(out long valuesLength) || valuesLength < 1)
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return false;
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values = new StObj[(int)valuesLength];
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}
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if (minExpectedOffset >= values.Length)
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break;
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values[minExpectedOffset] = (StObj)block.Instructions[i];
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elementCount++;
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}
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if (values == null || store.Kind != VariableKind.StackSlot || store.StoreCount != 1
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|| store.AddressCount != 0 || store.LoadCount > values.Length + 1)
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return false;
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if (store.LoadInstructions.Last().Parent is StLoc finalStore) {
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elementType = ((PointerType)finalStore.Variable.Type).ElementType;
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}
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instructionsToRemove += elementCount;
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return elementCount <= values.Length;
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}
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ILInstruction RewrapStore(ILVariable target, StObj storeInstruction, IType type)
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{
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ILInstruction targetInst;
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if (storeInstruction.Target.MatchLdLoc(out _))
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targetInst = new LdLoc(target);
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else if (storeInstruction.Target.MatchBinaryNumericInstruction(BinaryNumericOperator.Add, out var left, out var right)) {
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var old = (BinaryNumericInstruction)storeInstruction.Target;
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targetInst = new BinaryNumericInstruction(BinaryNumericOperator.Add, new LdLoc(target), right,
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old.CheckForOverflow, old.Sign);
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} else
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throw new NotSupportedException("This should never happen: Bug in HandleSequentialLocAllocInitializer!");
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return new StObj(targetInst, storeInstruction.Value, storeInstruction.Type);
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}
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ILInstruction StElemPtr(ILVariable target, int offset, LdcI4 value, IType type)
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{
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var targetInst = offset == 0 ? (ILInstruction)new LdLoc(target) : new BinaryNumericInstruction(
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BinaryNumericOperator.Add,
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new LdLoc(target),
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new Conv(new LdcI4(offset), PrimitiveType.I, false, Sign.Signed),
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false,
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Sign.None
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);
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return new StObj(targetInst, value, type);
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}
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/// <summary>
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/// Handle simple case where RuntimeHelpers.InitializeArray is not used.
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/// </summary>
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internal static bool HandleSimpleArrayInitializer(Block block, int pos, ILVariable store, IType elementType, int length, out ILInstruction[] values, out int elementCount)
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{
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elementCount = 0;
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values = new ILInstruction[length];
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int nextMinimumIndex = 0;
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for (int i = pos; i < block.Instructions.Count; i++) {
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if (nextMinimumIndex >= length)
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break;
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if (!block.Instructions[i].MatchStObj(out ILInstruction target, out ILInstruction value, out IType type)
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|| value.Descendants.OfType<IInstructionWithVariableOperand>().Any(inst => inst.Variable == store))
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{
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break;
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}
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if (!(target is LdElema ldelem) || !ldelem.Array.MatchLdLoc(store) || ldelem.Indices.Count != 1
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|| !ldelem.Indices[0].MatchLdcI4(out int index))
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{
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break;
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}
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// index must be in range [0..length[ and must be greater than or equal to nextMinimumIndex
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// to avoid running out of bounds or accidentally reordering instructions or overwriting previous instructions.
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// However, leaving array slots empty is allowed, as those are filled with default values when the
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// initializer block is generated.
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if (index < 0 || index >= length || index < nextMinimumIndex)
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return false;
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nextMinimumIndex = index;
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values[nextMinimumIndex] = value;
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nextMinimumIndex++;
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elementCount++;
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}
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if (pos + elementCount >= block.Instructions.Count)
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return false;
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return elementCount > 0;
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}
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bool HandleJaggedArrayInitializer(Block block, int pos, ILVariable store, IType elementType, int length, out ILVariable finalStore, out ILInstruction[] values, out int instructionsToRemove)
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{
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instructionsToRemove = 0;
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finalStore = null;
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values = new ILInstruction[length];
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ILInstruction initializer;
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IType type;
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for (int i = 0; i < length; i++) {
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// 1. Instruction: (optional) temporary copy of store
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bool hasTemporaryCopy = block.Instructions[pos].MatchStLoc(out var temp, out var storeLoad) && storeLoad.MatchLdLoc(store);
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if (hasTemporaryCopy) {
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if (!MatchJaggedArrayStore(block, pos + 1, temp, i, out initializer, out type))
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return false;
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} else {
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if (!MatchJaggedArrayStore(block, pos, store, i, out initializer, out type))
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return false;
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}
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values[i] = initializer;
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int inc = hasTemporaryCopy ? 3 : 2;
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pos += inc;
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instructionsToRemove += inc;
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}
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// In case there is an extra copy of the store variable
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// Remove it and use its value instead.
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if (block.Instructions[pos].MatchStLoc(out finalStore, out var array)) {
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instructionsToRemove++;
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return array.MatchLdLoc(store);
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}
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finalStore = store;
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return true;
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}
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bool MatchJaggedArrayStore(Block block, int pos, ILVariable store, int index, out ILInstruction initializer, out IType type)
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{
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initializer = null;
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type = null;
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// 3. Instruction: stobj(ldelema(ldloc temp, ldc.i4 0), ldloc tempArrayLoad)
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var finalInstruction = block.Instructions.ElementAtOrDefault(pos + 1);
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if (finalInstruction == null || !finalInstruction.MatchStObj(out var tempAccess, out var tempArrayLoad, out type)
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|| !tempArrayLoad.MatchLdLoc(out var initializerStore))
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{
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return false;
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}
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if (!(tempAccess is LdElema elemLoad) || !elemLoad.Array.MatchLdLoc(store) || elemLoad.Indices.Count != 1
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|| !elemLoad.Indices[0].MatchLdcI4(index))
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{
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return false;
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}
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// 2. Instruction: stloc(temp) with block (array initializer)
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var nextInstruction = block.Instructions.ElementAtOrDefault(pos);
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return nextInstruction != null
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&& nextInstruction.MatchStLoc(initializerStore, out initializer)
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&& initializer.OpCode == OpCode.Block;
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}
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Block BlockFromInitializer(ILVariable v, IType elementType, int[] arrayLength, ILInstruction[] values)
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{
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var block = new Block(BlockKind.ArrayInitializer);
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block.Instructions.Add(new StLoc(v, new NewArr(elementType, arrayLength.Select(l => new LdcI4(l)).ToArray())));
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int step = arrayLength.Length + 1;
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for (int i = 0; i < values.Length / step; i++) {
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// values array is filled backwards
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var value = values[step * i];
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var indices = new List<ILInstruction>();
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for (int j = step - 1; j >= 1; j--) {
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indices.Add(values[step * i + j]);
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}
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block.Instructions.Add(StElem(new LdLoc(v), indices.ToArray(), value, elementType));
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}
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block.FinalInstruction = new LdLoc(v);
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return block;
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}
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static bool MatchNewArr(ILInstruction instruction, out IType arrayType, out int[] length)
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{
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length = null;
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arrayType = null;
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if (!(instruction is NewArr newArr))
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return false;
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arrayType = newArr.Type;
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var args = newArr.Indices;
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length = new int[args.Count];
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for (int i = 0; i < args.Count; i++) {
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if (!args[i].MatchLdcI4(out int value) || value <= 0) return false;
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length[i] = value;
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}
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return true;
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}
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bool MatchInitializeArrayCall(ILInstruction instruction, out IMethod method, out ILVariable array, out FieldDefinition field)
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{
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method = null;
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array = null;
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field = default;
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if (!(instruction is Call call) || call.Arguments.Count != 2)
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return false;
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method = call.Method;
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if (!method.IsStatic || method.Name != "InitializeArray" || method.DeclaringTypeDefinition == null)
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return false;
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var declaringType = method.DeclaringTypeDefinition;
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if (declaringType.DeclaringType != null || declaringType.Name != "RuntimeHelpers"
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|| declaringType.Namespace != "System.Runtime.CompilerServices")
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{
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return false;
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}
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if (!call.Arguments[0].MatchLdLoc(out array))
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return false;
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if (!call.Arguments[1].MatchLdMemberToken(out var member))
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return false;
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if (member.MetadataToken.IsNil)
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return false;
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field = context.PEFile.Metadata.GetFieldDefinition((FieldDefinitionHandle)member.MetadataToken);
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return true;
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}
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bool ForwardScanInitializeArrayRuntimeHelper(Block body, int pos, ILVariable array, IType arrayType, int[] arrayLength, out ILInstruction[] values, out int foundPos)
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{
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if (MatchInitializeArrayCall(body.Instructions[pos], out var method, out var v2, out var field) && array == v2) {
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if (field.HasFlag(System.Reflection.FieldAttributes.HasFieldRVA)) {
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var valuesList = new List<ILInstruction>();
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var initialValue = field.GetInitialValue(context.PEFile.Reader, context.TypeSystem);
|
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if (DecodeArrayInitializer(arrayType, array, initialValue, arrayLength, valuesList)) {
|
|
values = valuesList.ToArray();
|
|
foundPos = pos;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
values = null;
|
|
foundPos = -1;
|
|
return false;
|
|
}
|
|
|
|
static bool DecodeArrayInitializer(IType type, ILVariable array, BlobReader initialValue, int[] arrayLength, List<ILInstruction> output)
|
|
{
|
|
TypeCode typeCode = ReflectionHelper.GetTypeCode(type);
|
|
switch (typeCode) {
|
|
case TypeCode.Boolean:
|
|
case TypeCode.Byte:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcI4(r.ReadByte()));
|
|
case TypeCode.SByte:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcI4(r.ReadSByte()));
|
|
case TypeCode.Int16:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcI4(r.ReadInt16()));
|
|
case TypeCode.Char:
|
|
case TypeCode.UInt16:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcI4(r.ReadUInt16()));
|
|
case TypeCode.Int32:
|
|
case TypeCode.UInt32:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcI4(r.ReadInt32()));
|
|
case TypeCode.Int64:
|
|
case TypeCode.UInt64:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcI8(r.ReadInt64()));
|
|
case TypeCode.Single:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcF4(r.ReadSingle()));
|
|
case TypeCode.Double:
|
|
return DecodeArrayInitializer(initialValue, array, arrayLength, output, typeCode, type, (ref BlobReader r) => new LdcF8(r.ReadDouble()));
|
|
case TypeCode.Object:
|
|
case TypeCode.Empty:
|
|
var typeDef = type.GetDefinition();
|
|
if (typeDef != null && typeDef.Kind == TypeKind.Enum)
|
|
return DecodeArrayInitializer(typeDef.EnumUnderlyingType, array, initialValue, arrayLength, output);
|
|
return false;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
delegate ILInstruction ValueDecoder(ref BlobReader reader);
|
|
|
|
static bool DecodeArrayInitializer(BlobReader initialValue, ILVariable array, int[] arrayLength,
|
|
List<ILInstruction> output, TypeCode elementType, IType type, ValueDecoder decoder)
|
|
{
|
|
int elementSize = ElementSizeOf(elementType);
|
|
var totalLength = arrayLength.Aggregate(1, (t, l) => t * l);
|
|
if (initialValue.RemainingBytes < (totalLength * elementSize))
|
|
return false;
|
|
|
|
for (int i = 0; i < totalLength; i++) {
|
|
output.Add(decoder(ref initialValue));
|
|
int next = i;
|
|
for (int j = arrayLength.Length - 1; j >= 0; j--) {
|
|
output.Add(new LdcI4(next % arrayLength[j]));
|
|
next = next / arrayLength[j];
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static ILInstruction StElem(ILInstruction array, ILInstruction[] indices, ILInstruction value, IType type)
|
|
{
|
|
if (type.GetStackType() != value.ResultType) {
|
|
value = new Conv(value, type.ToPrimitiveType(), false, Sign.None);
|
|
}
|
|
return new StObj(new LdElema(type, array, indices), value, type);
|
|
}
|
|
|
|
internal static ILInstruction GetNullExpression(IType elementType)
|
|
{
|
|
ITypeDefinition typeDef = elementType.GetEnumUnderlyingType().GetDefinition();
|
|
if (typeDef == null)
|
|
return new DefaultValue(elementType);
|
|
switch (typeDef.KnownTypeCode) {
|
|
case KnownTypeCode.Boolean:
|
|
case KnownTypeCode.Char:
|
|
case KnownTypeCode.SByte:
|
|
case KnownTypeCode.Byte:
|
|
case KnownTypeCode.Int16:
|
|
case KnownTypeCode.UInt16:
|
|
case KnownTypeCode.Int32:
|
|
case KnownTypeCode.UInt32:
|
|
return new LdcI4(0);
|
|
case KnownTypeCode.Int64:
|
|
case KnownTypeCode.UInt64:
|
|
return new LdcI8(0);
|
|
case KnownTypeCode.Single:
|
|
return new LdcF4(0);
|
|
case KnownTypeCode.Double:
|
|
return new LdcF8(0);
|
|
case KnownTypeCode.Decimal:
|
|
return new LdcDecimal(0);
|
|
case KnownTypeCode.Void:
|
|
throw new ArgumentException("void is not a valid element type!");
|
|
case KnownTypeCode.IntPtr:
|
|
case KnownTypeCode.UIntPtr:
|
|
default:
|
|
return new DefaultValue(elementType);
|
|
}
|
|
}
|
|
|
|
static int ElementSizeOf(TypeCode elementType)
|
|
{
|
|
switch (elementType) {
|
|
case TypeCode.Boolean:
|
|
case TypeCode.Byte:
|
|
case TypeCode.SByte:
|
|
return 1;
|
|
case TypeCode.Char:
|
|
case TypeCode.Int16:
|
|
case TypeCode.UInt16:
|
|
return 2;
|
|
case TypeCode.Int32:
|
|
case TypeCode.UInt32:
|
|
case TypeCode.Single:
|
|
return 4;
|
|
case TypeCode.Int64:
|
|
case TypeCode.UInt64:
|
|
case TypeCode.Double:
|
|
return 8;
|
|
default:
|
|
throw new ArgumentOutOfRangeException(nameof(elementType));
|
|
}
|
|
}
|
|
}
|
|
}
|