kc3-lang/angle/src/compiler/translator/tree_ops/NameEmbeddedUniformStructs.cpp

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• Hash : 472c74c6
  Author :
  Date : 2019-08-19T16:32:13
  

  Translator: Allow tree validation in children of TCompiler
  
  This is to be able to perform validation inside TranslatorVulkan, even
  if it's through ASSERTs.
  
  Additionally, every transformation is changed such that they do their
  validation themselves.  TIntermTraverser::updateTree() performs the
  validation, which indirectly validates many of three tree
  transformations.  Some of the more ancient transformations that don't
  use this function directly call TCompiler::validateAST.
  
  Bug: angleproject:2733
  Change-Id: Ie4af029d34e053c5ad1dc8c2c2568eecd625d344
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1761149
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/compiler/translator/tree_ops/NameEmbeddedUniformStructs.cpp

• //
  // Copyright 2018 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.
  //
  // NameEmbeddedUniformStructs: Gives nameless uniform struct internal names.
  //
  
  #include "compiler/translator/tree_ops/NameEmbeddedUniformStructs.h"
  
  #include "compiler/translator/SymbolTable.h"
  #include "compiler/translator/tree_util/IntermTraverse.h"
  
  namespace sh
  {
  namespace
  {
  // This traverser translates embedded uniform structs into a specifier and declaration.
  // This makes the declarations easier to move into uniform blocks.
  class Traverser : public TIntermTraverser
  {
    public:
      explicit Traverser(TSymbolTable *symbolTable)
          : TIntermTraverser(true, false, false, symbolTable)
      {}
  
      bool visitDeclaration(Visit visit, TIntermDeclaration *decl) override
      {
          ASSERT(visit == PreVisit);
  
          if (!mInGlobalScope)
          {
              return false;
          }
  
          const TIntermSequence &sequence = *(decl->getSequence());
          ASSERT(sequence.size() == 1);
          TIntermTyped *declarator = sequence.front()->getAsTyped();
          const TType &type        = declarator->getType();
  
          if (type.isStructSpecifier() && type.getQualifier() == EvqUniform)
          {
              const TStructure *structure = type.getStruct();
  
              if (structure->symbolType() == SymbolType::Empty)
              {
                  doReplacement(decl, declarator, structure);
              }
          }
  
          return false;
      }
  
    private:
      void doReplacement(TIntermDeclaration *decl,
                         TIntermTyped *declarator,
                         const TStructure *oldStructure)
      {
          // struct <structName> { ... };
          TStructure *structure = new TStructure(mSymbolTable, kEmptyImmutableString,
                                                 &oldStructure->fields(), SymbolType::AngleInternal);
          TType *namedType      = new TType(structure, true);
          namedType->setQualifier(EvqGlobal);
  
          TVariable *structVariable =
              new TVariable(mSymbolTable, kEmptyImmutableString, namedType, SymbolType::Empty);
          TIntermSymbol *structDeclarator       = new TIntermSymbol(structVariable);
          TIntermDeclaration *structDeclaration = new TIntermDeclaration;
          structDeclaration->appendDeclarator(structDeclarator);
  
          TIntermSequence *newSequence = new TIntermSequence;
          newSequence->push_back(structDeclaration);
  
          // uniform <structName> <structUniformName>;
          TIntermSymbol *asSymbol = declarator->getAsSymbolNode();
          if (asSymbol && asSymbol->variable().symbolType() != SymbolType::Empty)
          {
              TIntermDeclaration *namedDecl = new TIntermDeclaration;
              TType *uniformType            = new TType(structure, false);
              uniformType->setQualifier(EvqUniform);
  
              TVariable *newVar        = new TVariable(mSymbolTable, asSymbol->getName(), uniformType,
                                                asSymbol->variable().symbolType());
              TIntermSymbol *newSymbol = new TIntermSymbol(newVar);
              namedDecl->appendDeclarator(newSymbol);
  
              newSequence->push_back(namedDecl);
          }
  
          mMultiReplacements.emplace_back(getParentNode()->getAsBlock(), decl, *newSequence);
      }
  };
  }  // anonymous namespace
  
  bool NameEmbeddedStructUniforms(TCompiler *compiler, TIntermBlock *root, TSymbolTable *symbolTable)
  {
      Traverser nameStructs(symbolTable);
      root->traverse(&nameStructs);
      return nameStructs.updateTree(compiler, root);
  }
  }  // namespace sh
  

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