TranslatorHLSL.cpp

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Author : Shahbaz Youssefi
Date : 2019-08-19 16:32:13
Hash : 472c74c6
Message : 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>

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)
{}

bool 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;

    if (!sh::AddDefaultReturnStatements(this, root))
    {
        return false;
    }

    // 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().
    if (!SimplifyLoopConditions(
            this, root,
            IntermNodePatternMatcher::kExpressionReturningArray |
                IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
                IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
            &getSymbolTable()))
    {
        return false;
    }

    if (!SplitSequenceOperator(
            this, root,
            IntermNodePatternMatcher::kExpressionReturningArray |
                IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
                IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
            &getSymbolTable()))
    {
        return false;
    }

    // Note that SeparateDeclarations needs to be run before UnfoldShortCircuitToIf.
    if (!UnfoldShortCircuitToIf(this, root, &getSymbolTable()))
    {
        return false;
    }

    if (!SeparateArrayConstructorStatements(this, root))
    {
        return false;
    }

    if (!SeparateExpressionsReturningArrays(this, root, &getSymbolTable()))
    {
        return false;
    }

    // Note that SeparateDeclarations needs to be run before SeparateArrayInitialization.
    if (!SeparateArrayInitialization(this, root))
    {
        return false;
    }

    // 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.
    if (!ArrayReturnValueToOutParameter(this, root, &getSymbolTable()))
    {
        return false;
    }

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

    // 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)
    {
        if (!sh::RewriteElseBlocks(this, root, &getSymbolTable()))
        {
            return false;
        }
    }

    // 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.
    if (!sh::BreakVariableAliasingInInnerLoops(this, root))
    {
        return false;
    }

    // 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.
    if (!WrapSwitchStatementsInBlocks(this, root))
    {
        return false;
    }

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

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

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

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

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

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

    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();

    return true;
}

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