kc3-lang/angle/src/compiler/translator/TranslatorMetalDirect/DiscoverEnclosingFunctionTraverser.cpp

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• Author : Kyle Piddington
  Date : 2021-04-26 16:56:15
  Hash : d7aa0130
  Message : Upstream Apple's direct-to-Metal backend: compile translator. This change is meant to merge the translator changes from Apple's direct-to-Metal backend. Taken from Kyle Piddington's CL: https://chromium-review.googlesource.com/c/angle/angle/+/2857366/ The goal of this CL is to merge the translator code in a state that compiles, but not to switch the Metal backend over to use this translator backend yet. Bug: angleproject:5505 Change-Id: I68a6354604498cd5fd1eb96c13fc56f3b38f2bd0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2897536 Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>

• src/compiler/translator/TranslatorMetalDirect/DiscoverEnclosingFunctionTraverser.cpp

• //
  // Copyright 2020 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/TranslatorMetalDirect/DiscoverEnclosingFunctionTraverser.h"
  
  using namespace sh;
  
  DiscoverEnclosingFunctionTraverser::DiscoverEnclosingFunctionTraverser(bool preVisit_,
                                                                         bool inVisit_,
                                                                         bool postVisit_,
                                                                         TSymbolTable *symbolTable)
      : TIntermTraverser(preVisit_, inVisit_, postVisit_, symbolTable)
  {}
  
  const TFunction *DiscoverEnclosingFunctionTraverser::discoverEnclosingFunction(TIntermNode *node)
  {
      ASSERT(!node->getAsFunctionDefinition());
  
      unsigned height = 0;
      while (TIntermNode *ancestor = getAncestorNode(height))
      {
          if (TIntermFunctionDefinition *funcDefNode = ancestor->getAsFunctionDefinition())
          {
              return funcDefNode->getFunction();
          }
          ++height;
      }
  
      return nullptr;
  }