TranslatorHLSL.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/TranslatorHLSL.cpp

//
// Copyright 2002 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/TranslatorHLSL.h"

#include "compiler/translator/OutputHLSL.h"
#include "compiler/translator/tree_ops/AddDefaultReturnStatements.h"
#include "compiler/translator/tree_ops/ArrayReturnValueToOutParameter.h"
#include "compiler/translator/tree_ops/BreakVariableAliasingInInnerLoops.h"
#include "compiler/translator/tree_ops/EmulatePrecision.h"
#include "compiler/translator/tree_ops/ExpandIntegerPowExpressions.h"
#include "compiler/translator/tree_ops/PruneEmptyCases.h"
#include "compiler/translator/tree_ops/RemoveDynamicIndexing.h"
#include "compiler/translator/tree_ops/RewriteAtomicFunctionExpressions.h"
#include "compiler/translator/tree_ops/RewriteElseBlocks.h"
#include "compiler/translator/tree_ops/RewriteExpressionsWithShaderStorageBlock.h"
#include "compiler/translator/tree_ops/RewriteTexelFetchOffset.h"
#include "compiler/translator/tree_ops/RewriteUnaryMinusOperatorInt.h"
#include "compiler/translator/tree_ops/SeparateArrayConstructorStatements.h"
#include "compiler/translator/tree_ops/SeparateArrayInitialization.h"
#include "compiler/translator/tree_ops/SeparateDeclarations.h"
#include "compiler/translator/tree_ops/SeparateExpressionsReturningArrays.h"
#include "compiler/translator/tree_ops/SimplifyLoopConditions.h"
#include "compiler/translator/tree_ops/SplitSequenceOperator.h"
#include "compiler/translator/tree_ops/UnfoldShortCircuitToIf.h"
#include "compiler/translator/tree_ops/WrapSwitchStatementsInBlocks.h"
#include "compiler/translator/tree_util/IntermNodePatternMatcher.h"

namespace sh
{

TranslatorHLSL::TranslatorHLSL(sh::GLenum type, ShShaderSpec spec, ShShaderOutput output)
    : TCompiler(type, spec, output)
{}

void TranslatorHLSL::translate(TIntermBlock *root,
                               ShCompileOptions compileOptions,
                               PerformanceDiagnostics *perfDiagnostics)
{
    const ShBuiltInResources &resources = getResources();
    int numRenderTargets                = resources.EXT_draw_buffers ? resources.MaxDrawBuffers : 1;
    int maxDualSourceDrawBuffers =
        resources.EXT_blend_func_extended ? resources.MaxDualSourceDrawBuffers : 0;

    sh::AddDefaultReturnStatements(root);

    // Note that SimplifyLoopConditions needs to be run before any other AST transformations that
    // may need to generate new statements from loop conditions or loop expressions.
    // Note that SeparateDeclarations has already been run in TCompiler::compileTreeImpl().
    SimplifyLoopConditions(root,
                           IntermNodePatternMatcher::kExpressionReturningArray |
                               IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
                               IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
                           &getSymbolTable());

    SplitSequenceOperator(root,
                          IntermNodePatternMatcher::kExpressionReturningArray |
                              IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
                              IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
                          &getSymbolTable());

    // Note that SeparateDeclarations needs to be run before UnfoldShortCircuitToIf.
    UnfoldShortCircuitToIf(root, &getSymbolTable());

    SeparateArrayConstructorStatements(root);

    SeparateExpressionsReturningArrays(root, &getSymbolTable());

    // Note that SeparateDeclarations needs to be run before SeparateArrayInitialization.
    SeparateArrayInitialization(root);

    // HLSL doesn't support arrays as return values, we'll need to make functions that have an array
    // as a return value to use an out parameter to transfer the array data instead.
    ArrayReturnValueToOutParameter(root, &getSymbolTable());

    if (!shouldRunLoopAndIndexingValidation(compileOptions))
    {
        // HLSL doesn't support dynamic indexing of vectors and matrices.
        RemoveDynamicIndexing(root, &getSymbolTable(), perfDiagnostics);
    }

    // Work around D3D9 bug that would manifest in vertex shaders with selection blocks which
    // use a vertex attribute as a condition, and some related computation in the else block.
    if (getOutputType() == SH_HLSL_3_0_OUTPUT && getShaderType() == GL_VERTEX_SHADER)
    {
        sh::RewriteElseBlocks(root, &getSymbolTable());
    }

    // Work around an HLSL compiler frontend aliasing optimization bug.
    // TODO(cwallez) The date is 2016-08-25, Microsoft said the bug would be fixed
    // in the next release of d3dcompiler.dll, it would be nice to detect the DLL
    // version and only apply the workaround if it is too old.
    sh::BreakVariableAliasingInInnerLoops(root);

    // WrapSwitchStatementsInBlocks should be called after any AST transformations that might
    // introduce variable declarations inside the main scope of any switch statement. It cannot
    // result in no-op cases at the end of switch statements, because unreferenced variables
    // have already been pruned.
    WrapSwitchStatementsInBlocks(root);

    bool precisionEmulation =
        getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;

    if (precisionEmulation)
    {
        EmulatePrecision emulatePrecision(&getSymbolTable());
        root->traverse(&emulatePrecision);
        emulatePrecision.updateTree();
        emulatePrecision.writeEmulationHelpers(getInfoSink().obj, getShaderVersion(),
                                               getOutputType());
    }

    if ((compileOptions & SH_EXPAND_SELECT_HLSL_INTEGER_POW_EXPRESSIONS) != 0)
    {
        sh::ExpandIntegerPowExpressions(root, &getSymbolTable());
    }

    if ((compileOptions & SH_REWRITE_TEXELFETCHOFFSET_TO_TEXELFETCH) != 0)
    {
        sh::RewriteTexelFetchOffset(root, getSymbolTable(), getShaderVersion());
    }

    if (((compileOptions & SH_REWRITE_INTEGER_UNARY_MINUS_OPERATOR) != 0) &&
        getShaderType() == GL_VERTEX_SHADER)
    {
        sh::RewriteUnaryMinusOperatorInt(root);
    }

    if (getShaderVersion() >= 310)
    {
        // Due to ssbo also can be used as the argument of atomic memory functions, we should put
        // RewriteExpressionsWithShaderStorageBlock before RewriteAtomicFunctionExpressions.
        sh::RewriteExpressionsWithShaderStorageBlock(root, &getSymbolTable());
        sh::RewriteAtomicFunctionExpressions(root, &getSymbolTable(), getShaderVersion());
    }

    sh::OutputHLSL outputHLSL(getShaderType(), getShaderSpec(), getShaderVersion(),
                              getExtensionBehavior(), getSourcePath(), getOutputType(),
                              numRenderTargets, maxDualSourceDrawBuffers, getUniforms(),
                              compileOptions, getComputeShaderLocalSize(), &getSymbolTable(),
                              perfDiagnostics, mShaderStorageBlocks);

    outputHLSL.output(root, getInfoSink().obj);

    mShaderStorageBlockRegisterMap = outputHLSL.getShaderStorageBlockRegisterMap();
    mUniformBlockRegisterMap       = outputHLSL.getUniformBlockRegisterMap();
    mUniformRegisterMap            = outputHLSL.getUniformRegisterMap();
    mReadonlyImage2DRegisterIndex  = outputHLSL.getReadonlyImage2DRegisterIndex();
    mImage2DRegisterIndex          = outputHLSL.getImage2DRegisterIndex();
    mUsedImage2DFunctionNames      = outputHLSL.getUsedImage2DFunctionNames();
}

bool TranslatorHLSL::shouldFlattenPragmaStdglInvariantAll()
{
    // Not necessary when translating to HLSL.
    return false;
}

bool TranslatorHLSL::hasShaderStorageBlock(const std::string &uniformBlockName) const
{
    return (mShaderStorageBlockRegisterMap.count(uniformBlockName) > 0);
}

unsigned int TranslatorHLSL::getShaderStorageBlockRegister(
    const std::string &shaderStorageBlockName) const
{
    ASSERT(hasShaderStorageBlock(shaderStorageBlockName));
    return mShaderStorageBlockRegisterMap.find(shaderStorageBlockName)->second;
}

bool TranslatorHLSL::hasUniformBlock(const std::string &uniformBlockName) const
{
    return (mUniformBlockRegisterMap.count(uniformBlockName) > 0);
}

unsigned int TranslatorHLSL::getUniformBlockRegister(const std::string &uniformBlockName) const
{
    ASSERT(hasUniformBlock(uniformBlockName));
    return mUniformBlockRegisterMap.find(uniformBlockName)->second;
}

const std::map<std::string, unsigned int> *TranslatorHLSL::getUniformRegisterMap() const
{
    return &mUniformRegisterMap;
}

unsigned int TranslatorHLSL::getReadonlyImage2DRegisterIndex() const
{
    return mReadonlyImage2DRegisterIndex;
}

unsigned int TranslatorHLSL::getImage2DRegisterIndex() const
{
    return mImage2DRegisterIndex;
}

const std::set<std::string> *TranslatorHLSL::getUsedImage2DFunctionNames() const
{
    return &mUsedImage2DFunctionNames;
}

}  // namespace sh

kc3-lang/angle/src/compiler/translator/TranslatorHLSL.cpp

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kc3-lang/angle /src/compiler/translator/TranslatorHLSL.cpp