diff options
Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/InitializeVariables.cpp')
| -rw-r--r-- | src/3rdparty/angle/src/compiler/translator/InitializeVariables.cpp | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/InitializeVariables.cpp b/src/3rdparty/angle/src/compiler/translator/InitializeVariables.cpp deleted file mode 100644 index aa1a042fac..0000000000 --- a/src/3rdparty/angle/src/compiler/translator/InitializeVariables.cpp +++ /dev/null @@ -1,290 +0,0 @@ -// -// Copyright (c) 2002-2013 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. -// - -#include "compiler/translator/InitializeVariables.h" - -#include "angle_gl.h" -#include "common/debug.h" -#include "compiler/translator/FindMain.h" -#include "compiler/translator/IntermNode_util.h" -#include "compiler/translator/IntermTraverse.h" -#include "compiler/translator/SymbolTable.h" -#include "compiler/translator/util.h" - -namespace sh -{ - -namespace -{ - -void AddArrayZeroInitSequence(const TIntermTyped *initializedNode, - bool canUseLoopsToInitialize, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable); - -void AddStructZeroInitSequence(const TIntermTyped *initializedNode, - bool canUseLoopsToInitialize, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable); - -TIntermBinary *CreateZeroInitAssignment(const TIntermTyped *initializedNode) -{ - TIntermTyped *zero = CreateZeroNode(initializedNode->getType()); - return new TIntermBinary(EOpAssign, initializedNode->deepCopy(), zero); -} - -void AddZeroInitSequence(const TIntermTyped *initializedNode, - bool canUseLoopsToInitialize, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable) -{ - if (initializedNode->isArray()) - { - AddArrayZeroInitSequence(initializedNode, canUseLoopsToInitialize, initSequenceOut, - symbolTable); - } - else if (initializedNode->getType().isStructureContainingArrays() || - initializedNode->getType().isNamelessStruct()) - { - AddStructZeroInitSequence(initializedNode, canUseLoopsToInitialize, initSequenceOut, - symbolTable); - } - else - { - initSequenceOut->push_back(CreateZeroInitAssignment(initializedNode)); - } -} - -void AddStructZeroInitSequence(const TIntermTyped *initializedNode, - bool canUseLoopsToInitialize, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable) -{ - ASSERT(initializedNode->getBasicType() == EbtStruct); - const TStructure *structType = initializedNode->getType().getStruct(); - for (int i = 0; i < static_cast<int>(structType->fields().size()); ++i) - { - TIntermBinary *element = new TIntermBinary(EOpIndexDirectStruct, - initializedNode->deepCopy(), CreateIndexNode(i)); - // Structs can't be defined inside structs, so the type of a struct field can't be a - // nameless struct. - ASSERT(!element->getType().isNamelessStruct()); - AddZeroInitSequence(element, canUseLoopsToInitialize, initSequenceOut, symbolTable); - } -} - -void AddArrayZeroInitStatementList(const TIntermTyped *initializedNode, - bool canUseLoopsToInitialize, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable) -{ - for (unsigned int i = 0; i < initializedNode->getOutermostArraySize(); ++i) - { - TIntermBinary *element = - new TIntermBinary(EOpIndexDirect, initializedNode->deepCopy(), CreateIndexNode(i)); - AddZeroInitSequence(element, canUseLoopsToInitialize, initSequenceOut, symbolTable); - } -} - -void AddArrayZeroInitForLoop(const TIntermTyped *initializedNode, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable) -{ - ASSERT(initializedNode->isArray()); - TSymbolUniqueId indexSymbol(symbolTable); - - TIntermSymbol *indexSymbolNode = CreateTempSymbolNode(indexSymbol, TType(EbtInt), EvqTemporary); - TIntermDeclaration *indexInit = - CreateTempInitDeclarationNode(indexSymbol, CreateZeroNode(TType(EbtInt)), EvqTemporary); - TIntermConstantUnion *arraySizeNode = CreateIndexNode(initializedNode->getOutermostArraySize()); - TIntermBinary *indexSmallerThanSize = - new TIntermBinary(EOpLessThan, indexSymbolNode->deepCopy(), arraySizeNode); - TIntermUnary *indexIncrement = new TIntermUnary(EOpPreIncrement, indexSymbolNode->deepCopy()); - - TIntermBlock *forLoopBody = new TIntermBlock(); - TIntermSequence *forLoopBodySeq = forLoopBody->getSequence(); - - TIntermBinary *element = new TIntermBinary(EOpIndexIndirect, initializedNode->deepCopy(), - indexSymbolNode->deepCopy()); - AddZeroInitSequence(element, true, forLoopBodySeq, symbolTable); - - TIntermLoop *forLoop = - new TIntermLoop(ELoopFor, indexInit, indexSmallerThanSize, indexIncrement, forLoopBody); - initSequenceOut->push_back(forLoop); -} - -void AddArrayZeroInitSequence(const TIntermTyped *initializedNode, - bool canUseLoopsToInitialize, - TIntermSequence *initSequenceOut, - TSymbolTable *symbolTable) -{ - // The array elements are assigned one by one to keep the AST compatible with ESSL 1.00 which - // doesn't have array assignment. We'll do this either with a for loop or just a list of - // statements assigning to each array index. Note that it is important to have the array init in - // the right order to workaround http://crbug.com/709317 - bool isSmallArray = initializedNode->getOutermostArraySize() <= 1u || - (initializedNode->getBasicType() != EbtStruct && - !initializedNode->getType().isArrayOfArrays() && - initializedNode->getOutermostArraySize() <= 3u); - if (initializedNode->getQualifier() == EvqFragData || - initializedNode->getQualifier() == EvqFragmentOut || isSmallArray || - !canUseLoopsToInitialize) - { - // Fragment outputs should not be indexed by non-constant indices. - // Also it doesn't make sense to use loops to initialize very small arrays. - AddArrayZeroInitStatementList(initializedNode, canUseLoopsToInitialize, initSequenceOut, - symbolTable); - } - else - { - AddArrayZeroInitForLoop(initializedNode, initSequenceOut, symbolTable); - } -} - -void InsertInitCode(TIntermSequence *mainBody, - const InitVariableList &variables, - TSymbolTable *symbolTable, - int shaderVersion, - const TExtensionBehavior &extensionBehavior, - bool canUseLoopsToInitialize) -{ - for (const auto &var : variables) - { - TString name = TString(var.name.c_str()); - size_t pos = name.find_last_of('['); - if (pos != TString::npos) - { - name = name.substr(0, pos); - } - - TIntermTyped *initializedSymbol = nullptr; - if (var.isBuiltIn()) - { - initializedSymbol = ReferenceBuiltInVariable(name, *symbolTable, shaderVersion); - if (initializedSymbol->getQualifier() == EvqFragData && - !IsExtensionEnabled(extensionBehavior, TExtension::EXT_draw_buffers)) - { - // If GL_EXT_draw_buffers is disabled, only the 0th index of gl_FragData can be - // written to. - // TODO(oetuaho): This is a bit hacky and would be better to remove, if we came up - // with a good way to do it. Right now "gl_FragData" in symbol table is initialized - // to have the array size of MaxDrawBuffers, and the initialization happens before - // the shader sets the extensions it is using. - initializedSymbol = - new TIntermBinary(EOpIndexDirect, initializedSymbol, CreateIndexNode(0)); - } - } - else - { - initializedSymbol = ReferenceGlobalVariable(name, *symbolTable); - } - ASSERT(initializedSymbol != nullptr); - - TIntermSequence *initCode = - CreateInitCode(initializedSymbol, canUseLoopsToInitialize, symbolTable); - mainBody->insert(mainBody->begin(), initCode->begin(), initCode->end()); - } -} - -class InitializeLocalsTraverser : public TIntermTraverser -{ - public: - InitializeLocalsTraverser(int shaderVersion, - TSymbolTable *symbolTable, - bool canUseLoopsToInitialize) - : TIntermTraverser(true, false, false, symbolTable), - mShaderVersion(shaderVersion), - mCanUseLoopsToInitialize(canUseLoopsToInitialize) - { - } - - protected: - bool visitDeclaration(Visit visit, TIntermDeclaration *node) override - { - for (TIntermNode *declarator : *node->getSequence()) - { - if (!mInGlobalScope && !declarator->getAsBinaryNode()) - { - TIntermSymbol *symbol = declarator->getAsSymbolNode(); - ASSERT(symbol); - if (symbol->getSymbol() == "") - { - continue; - } - - // Arrays may need to be initialized one element at a time, since ESSL 1.00 does not - // support array constructors or assigning arrays. - bool arrayConstructorUnavailable = - (symbol->isArray() || symbol->getType().isStructureContainingArrays()) && - mShaderVersion == 100; - // Nameless struct constructors can't be referred to, so they also need to be - // initialized one element at a time. - // TODO(oetuaho): Check if it makes sense to initialize using a loop, even if we - // could use an initializer. It could at least reduce code size for very large - // arrays, but could hurt runtime performance. - if (arrayConstructorUnavailable || symbol->getType().isNamelessStruct()) - { - // SimplifyLoopConditions should have been run so the parent node of this node - // should not be a loop. - ASSERT(getParentNode()->getAsLoopNode() == nullptr); - // SeparateDeclarations should have already been run, so we don't need to worry - // about further declarators in this declaration depending on the effects of - // this declarator. - ASSERT(node->getSequence()->size() == 1); - insertStatementsInParentBlock( - TIntermSequence(), - *CreateInitCode(symbol, mCanUseLoopsToInitialize, mSymbolTable)); - } - else - { - TIntermBinary *init = - new TIntermBinary(EOpInitialize, symbol, CreateZeroNode(symbol->getType())); - queueReplacementWithParent(node, symbol, init, OriginalNode::BECOMES_CHILD); - } - } - } - return false; - } - - private: - int mShaderVersion; - bool mCanUseLoopsToInitialize; -}; - -} // namespace anonymous - -TIntermSequence *CreateInitCode(const TIntermTyped *initializedSymbol, - bool canUseLoopsToInitialize, - TSymbolTable *symbolTable) -{ - TIntermSequence *initCode = new TIntermSequence(); - AddZeroInitSequence(initializedSymbol, canUseLoopsToInitialize, initCode, symbolTable); - return initCode; -} - -void InitializeUninitializedLocals(TIntermBlock *root, - int shaderVersion, - bool canUseLoopsToInitialize, - TSymbolTable *symbolTable) -{ - InitializeLocalsTraverser traverser(shaderVersion, symbolTable, canUseLoopsToInitialize); - root->traverse(&traverser); - traverser.updateTree(); -} - -void InitializeVariables(TIntermBlock *root, - const InitVariableList &vars, - TSymbolTable *symbolTable, - int shaderVersion, - const TExtensionBehavior &extensionBehavior, - bool canUseLoopsToInitialize) -{ - TIntermBlock *body = FindMainBody(root); - InsertInitCode(body->getSequence(), vars, symbolTable, shaderVersion, extensionBehavior, - canUseLoopsToInitialize); -} - -} // namespace sh |