kc3-lang/angle/src/compiler/translator/tree_ops/DeferGlobalInitializers.h

• Show log

  Commit

• Hash : 950d054a
  Author :
  Date : 2024-01-11T00:00:00
  

  Metal: Do not defer global const initializers
  
  Since MSL supports constant global variables, they should
  not be included in the DeferGlobalInitializers operation.
  
  This reduces temporary register usage and thus makes shaders
  that use large const arrays more compatible with Apple GPUs.
  
  Fixed: angleproject:8479
  Change-Id: If1cd17a0a194173e60e6b5152297054fc384c0b2
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5189165
  Reviewed-by: Kimmo Kinnunen <kkinnunen@apple.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
  

Download

• src/compiler/translator/tree_ops/DeferGlobalInitializers.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.
  //
  // DeferGlobalInitializers is an AST traverser that moves global initializers into a separate
  // function that is called in the beginning of main(). This enables initialization of globals with
  // uniforms or non-constant globals, as allowed by the WebGL spec. Some initializers referencing
  // non-constants may need to be unfolded into if statements in HLSL - this kind of steps should be
  // done after DeferGlobalInitializers is run. Note that it's important that the function definition
  // is at the end of the shader, as some globals may be declared after main().
  //
  // It can also initialize all uninitialized globals.
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_DEFERGLOBALINITIALIZERS_H_
  #define COMPILER_TRANSLATOR_TREEOPS_DEFERGLOBALINITIALIZERS_H_
  
  #include "common/angleutils.h"
  
  namespace sh
  {
  
  class TCompiler;
  class TIntermBlock;
  class TSymbolTable;
  
  [[nodiscard]] bool DeferGlobalInitializers(TCompiler *compiler,
                                             TIntermBlock *root,
                                             bool initializeUninitializedGlobals,
                                             bool canUseLoopsToInitialize,
                                             bool highPrecisionSupported,
                                             bool forceDeferNonConstGlobalInitializers,
                                             TSymbolTable *symbolTable);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_DEFERGLOBALINITIALIZERS_H_
  

Download