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

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• Hash : 6f80f0f0
  Author :
  Date : 2022-08-06T02:29:19
  

  Translator: Clean up the compile flag passing interface
  
  Historically, compile flags were sent to the translator as a bitmask.
  Recently, we were getting close to running out of bits.  Additionally,
  direct-to-metal work had started to introduce constants to be passed to
  the translator, which were misplaced in ShBuiltInResources and Caps.
  Recent work on Pixel Local Storage adds even more constants, aggravating
  the situation.
  
  In this change, the interface to passing compile flags is reworked.  A
  struct is passed (instead of a bitmask) that has one bit for each flag.
  This can be indefinitely extended.  Additionally, the constants needed
  by metal and PLS are also placed in this struct.  In turn, the backends
  can set these options directly, and don't have to hack them into Caps to
  further get hacked into ShBuiltInResources.
  
  Bug: angleproject:7559
  Change-Id: If93f1e1b8818ad3a0ac708ab04ab93b4b397d114
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3812562
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>
  Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com>
  Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/compiler/translator/tree_util/IntermNodePatternMatcher.h

• //
  // 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.
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEUTIL_INTERMNODEPATTERNMATCHER_H_
  #define COMPILER_TRANSLATOR_TREEUTIL_INTERMNODEPATTERNMATCHER_H_
  
  namespace sh
  {
  
  class TIntermAggregate;
  class TIntermBinary;
  class TIntermDeclaration;
  class TIntermNode;
  class TIntermTernary;
  class TIntermUnary;
  
  class IntermNodePatternMatcher
  {
    public:
      static bool IsDynamicIndexingOfNonSSBOVectorOrMatrix(TIntermBinary *node);
      static bool IsDynamicIndexingOfVectorOrMatrix(TIntermBinary *node);
      static bool IsDynamicIndexingOfSwizzledVector(TIntermBinary *node);
  
      enum PatternType : unsigned int
      {
          // Matches expressions that are unfolded to if statements by UnfoldShortCircuitToIf
          kUnfoldedShortCircuitExpression = 1u << 0u,
  
          // Matches expressions that return arrays with the exception of simple statements where a
          // constructor or function call result is assigned.
          kExpressionReturningArray = 1u << 1u,
  
          // Matches dynamic indexing of vectors or matrices in l-values.
          kDynamicIndexingOfVectorOrMatrixInLValue = 1u << 2u,
  
          // Matches declarations with more than one declared variables.
          kMultiDeclaration = 1u << 3u,
  
          // Matches declarations of arrays.
          kArrayDeclaration = 1u << 4u,
  
          // Matches declarations of structs where the struct type does not have a name.
          kNamelessStructDeclaration = 1u << 5u,
  
          // Matches array length() method.
          kArrayLengthMethod = 1u << 6u,
  
          // Matches a vector or matrix constructor whose arguments are scalarized by the
          // scalarizeVecOrMatConstructorArguments workaround.
          kScalarizedVecOrMatConstructor = 1u << 7u,
      };
      IntermNodePatternMatcher(const unsigned int mask);
  
      bool match(TIntermUnary *node) const;
  
      bool match(TIntermBinary *node, TIntermNode *parentNode) const;
  
      // Use this version for checking binary node matches in case you're using flag
      // kDynamicIndexingOfVectorOrMatrixInLValue.
      bool match(TIntermBinary *node, TIntermNode *parentNode, bool isLValueRequiredHere) const;
  
      bool match(TIntermAggregate *node, TIntermNode *parentNode) const;
      bool match(TIntermTernary *node) const;
      bool match(TIntermDeclaration *node) const;
  
    private:
      const unsigned int mMask;
  
      bool matchInternal(TIntermBinary *node, TIntermNode *parentNode) const;
  };
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEUTIL_INTERMNODEPATTERNMATCHER_H_
  

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