IntermNodePatternMatcher.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/tree_util/IntermNodePatternMatcher.cpp

//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// IntermNodePatternMatcher is a helper class for matching node trees to given patterns.
// It can be used whenever the same checks for certain node structures are common to multiple AST
// traversers.
//

#include "compiler/translator/tree_util/IntermNodePatternMatcher.h"

#include "compiler/translator/IntermNode.h"
#include "compiler/translator/SymbolTable.h"
#include "compiler/translator/util.h"

namespace sh
{

namespace
{

bool ContainsMatrixNode(const TIntermSequence &sequence)
{
    for (size_t ii = 0; ii < sequence.size(); ++ii)
    {
        TIntermTyped *node = sequence[ii]->getAsTyped();
        if (node && node->isMatrix())
            return true;
    }
    return false;
}

bool ContainsVectorNode(const TIntermSequence &sequence)
{
    for (size_t ii = 0; ii < sequence.size(); ++ii)
    {
        TIntermTyped *node = sequence[ii]->getAsTyped();
        if (node && node->isVector())
            return true;
    }
    return false;
}

}  // anonymous namespace

IntermNodePatternMatcher::IntermNodePatternMatcher(const unsigned int mask) : mMask(mask) {}

// static
bool IntermNodePatternMatcher::IsDynamicIndexingOfNonSSBOVectorOrMatrix(TIntermBinary *node)
{
    return IsDynamicIndexingOfVectorOrMatrix(node) && !IsInShaderStorageBlock(node->getLeft());
}

// static
bool IntermNodePatternMatcher::IsDynamicIndexingOfVectorOrMatrix(TIntermBinary *node)
{
    return node->getOp() == EOpIndexIndirect && !node->getLeft()->isArray() &&
           node->getLeft()->getBasicType() != EbtStruct;
}

bool IntermNodePatternMatcher::matchInternal(TIntermBinary *node, TIntermNode *parentNode)
{
    if ((mMask & kExpressionReturningArray) != 0)
    {
        if (node->isArray() && node->getOp() == EOpAssign && parentNode != nullptr &&
            !parentNode->getAsBlock())
        {
            return true;
        }
    }

    if ((mMask & kUnfoldedShortCircuitExpression) != 0)
    {
        if (node->getRight()->hasSideEffects() &&
            (node->getOp() == EOpLogicalOr || node->getOp() == EOpLogicalAnd))
        {
            return true;
        }
    }
    return false;
}

bool IntermNodePatternMatcher::match(TIntermUnary *node)
{
    if ((mMask & kArrayLengthMethod) != 0)
    {
        if (node->getOp() == EOpArrayLength)
        {
            return true;
        }
    }
    return false;
}

bool IntermNodePatternMatcher::match(TIntermBinary *node, TIntermNode *parentNode)
{
    // L-value tracking information is needed to check for dynamic indexing in L-value.
    // Traversers that don't track l-values can still use this class and match binary nodes with
    // this variation of this method if they don't need to check for dynamic indexing in l-values.
    ASSERT((mMask & kDynamicIndexingOfVectorOrMatrixInLValue) == 0);
    return matchInternal(node, parentNode);
}

bool IntermNodePatternMatcher::match(TIntermBinary *node,
                                     TIntermNode *parentNode,
                                     bool isLValueRequiredHere)
{
    if (matchInternal(node, parentNode))
    {
        return true;
    }
    if ((mMask & kDynamicIndexingOfVectorOrMatrixInLValue) != 0)
    {
        if (isLValueRequiredHere && IsDynamicIndexingOfVectorOrMatrix(node))
        {
            return true;
        }
    }
    return false;
}

bool IntermNodePatternMatcher::match(TIntermAggregate *node, TIntermNode *parentNode)
{
    if ((mMask & kExpressionReturningArray) != 0)
    {
        if (parentNode != nullptr)
        {
            TIntermBinary *parentBinary = parentNode->getAsBinaryNode();
            bool parentIsAssignment =
                (parentBinary != nullptr &&
                 (parentBinary->getOp() == EOpAssign || parentBinary->getOp() == EOpInitialize));

            if (node->getType().isArray() && !parentIsAssignment &&
                (node->isConstructor() || node->isFunctionCall()) && !parentNode->getAsBlock())
            {
                return true;
            }
        }
    }
    if ((mMask & kScalarizedVecOrMatConstructor) != 0)
    {
        if (node->getOp() == EOpConstruct)
        {
            if (node->getType().isVector() && ContainsMatrixNode(*(node->getSequence())))
            {
                return true;
            }
            else if (node->getType().isMatrix() && ContainsVectorNode(*(node->getSequence())))
            {
                return true;
            }
        }
    }
    return false;
}

bool IntermNodePatternMatcher::match(TIntermTernary *node)
{
    if ((mMask & kUnfoldedShortCircuitExpression) != 0)
    {
        return true;
    }
    return false;
}

bool IntermNodePatternMatcher::match(TIntermDeclaration *node)
{
    if ((mMask & kMultiDeclaration) != 0)
    {
        if (node->getSequence()->size() > 1)
        {
            return true;
        }
    }
    if ((mMask & kArrayDeclaration) != 0)
    {
        if (node->getSequence()->front()->getAsTyped()->getType().isStructureContainingArrays())
        {
            return true;
        }
        // Need to check from all declarators whether they are arrays since that may vary between
        // declarators.
        for (TIntermNode *declarator : *node->getSequence())
        {
            if (declarator->getAsTyped()->isArray())
            {
                return true;
            }
        }
    }
    if ((mMask & kNamelessStructDeclaration) != 0)
    {
        TIntermTyped *declarator = node->getSequence()->front()->getAsTyped();
        if (declarator->getBasicType() == EbtStruct &&
            declarator->getType().getStruct()->symbolType() == SymbolType::Empty)
        {
            return true;
        }
    }
    return false;
}

}  // namespace sh

kc3-lang/angle/src/compiler/translator/tree_util/IntermNodePatternMatcher.cpp

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kc3-lang/angle /src/compiler/translator/tree_util/IntermNodePatternMatcher.cpp