src/tint/lang/glsl/writer/raise/raise.cc

// Copyright 2023 The Dawn & Tint Authors
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#include "src/tint/lang/glsl/writer/raise/raise.h"

#include "src/tint/lang/core/ir/transform/add_empty_entry_point.h"
#include "src/tint/lang/core/ir/transform/array_length_from_uniform.h"
#include "src/tint/lang/core/ir/transform/binary_polyfill.h"
#include "src/tint/lang/core/ir/transform/binding_remapper.h"
#include "src/tint/lang/core/ir/transform/block_decorated_structs.h"
#include "src/tint/lang/core/ir/transform/builtin_polyfill.h"
#include "src/tint/lang/core/ir/transform/conversion_polyfill.h"
#include "src/tint/lang/core/ir/transform/demote_to_helper.h"
#include "src/tint/lang/core/ir/transform/direct_variable_access.h"
#include "src/tint/lang/core/ir/transform/multiplanar_external_texture.h"
#include "src/tint/lang/core/ir/transform/preserve_padding.h"
#include "src/tint/lang/core/ir/transform/remove_continue_in_switch.h"
#include "src/tint/lang/core/ir/transform/remove_terminator_args.h"
#include "src/tint/lang/core/ir/transform/rename_conflicts.h"
#include "src/tint/lang/core/ir/transform/robustness.h"
#include "src/tint/lang/core/ir/transform/std140.h"
#include "src/tint/lang/core/ir/transform/value_to_let.h"
#include "src/tint/lang/core/ir/transform/vectorize_scalar_matrix_constructors.h"
#include "src/tint/lang/core/ir/transform/zero_init_workgroup_memory.h"
#include "src/tint/lang/glsl/writer/common/option_helpers.h"
#include "src/tint/lang/glsl/writer/raise/builtin_polyfill.h"
#include "src/tint/lang/glsl/writer/raise/shader_io.h"

namespace tint::glsl::writer {

Result<SuccessType> Raise(core::ir::Module& module, const Options& options) {
#define RUN_TRANSFORM(name, ...)         \
    do {                                 \
        auto result = name(__VA_ARGS__); \
        if (result != Success) {         \
            return result.Failure();     \
        }                                \
    } while (false)

    tint::transform::multiplanar::BindingsMap multiplanar_map{};
    RemapperData remapper_data{};
    PopulateBindingInfo(options, remapper_data, multiplanar_map);
    RUN_TRANSFORM(core::ir::transform::BindingRemapper, module, remapper_data);

    {
        core::ir::transform::BinaryPolyfillConfig binary_polyfills{};
        binary_polyfills.int_div_mod = !options.disable_polyfill_integer_div_mod;
        binary_polyfills.bitshift_modulo = true;  // crbug.com/tint/1543
        RUN_TRANSFORM(core::ir::transform::BinaryPolyfill, module, binary_polyfills);
    }

    {
        core::ir::transform::BuiltinPolyfillConfig core_polyfills{};
        core_polyfills.clamp_int = true;
        core_polyfills.count_leading_zeros = true;
        core_polyfills.count_trailing_zeros = true;
        core_polyfills.extract_bits = core::ir::transform::BuiltinPolyfillLevel::kClampOrRangeCheck;
        core_polyfills.first_leading_bit = true;
        core_polyfills.first_trailing_bit = true;
        core_polyfills.insert_bits = core::ir::transform::BuiltinPolyfillLevel::kClampOrRangeCheck;
        core_polyfills.saturate = true;
        core_polyfills.texture_sample_base_clamp_to_edge_2d_f32 = true;
        core_polyfills.dot_4x8_packed = true;
        core_polyfills.pack_unpack_4x8 = true;
        core_polyfills.pack_4xu8_clamp = true;

        // TODO(dsinclair): bgra8unorm
        // TODO(dsinclair): bitshift_modulo
        // TODO(dsinclair): int_div_mod

        RUN_TRANSFORM(core::ir::transform::BuiltinPolyfill, module, core_polyfills);
    }

    {
        core::ir::transform::ConversionPolyfillConfig conversion_polyfills;
        conversion_polyfills.ftoi = true;
        RUN_TRANSFORM(core::ir::transform::ConversionPolyfill, module, conversion_polyfills);
    }

    if (!options.disable_robustness) {
        core::ir::transform::RobustnessConfig config{};
        RUN_TRANSFORM(core::ir::transform::Robustness, module, config);
    }

    RUN_TRANSFORM(core::ir::transform::MultiplanarExternalTexture, module, multiplanar_map);

    RUN_TRANSFORM(core::ir::transform::BlockDecoratedStructs, module);

    // TODO(dsinclair): TextureBuiltinsFromUniform
    // TODO(dsinclair): OffsetFirstIndex
    // TODO(dsinclair): CombineSamplers
    // TODO(dsinclair): PadStructs
    // TODO(dsinclair): Texture1DTo2D

    RUN_TRANSFORM(core::ir::transform::DirectVariableAccess, module,
                  core::ir::transform::DirectVariableAccessOptions{});

    if (!options.disable_workgroup_init) {
        RUN_TRANSFORM(core::ir::transform::ZeroInitWorkgroupMemory, module);
    }

    // Must come after zero-init as it will add builtins
    RUN_TRANSFORM(raise::BuiltinPolyfill, module);

    RUN_TRANSFORM(core::ir::transform::PreservePadding, module);
    RUN_TRANSFORM(core::ir::transform::VectorizeScalarMatrixConstructors, module);
    RUN_TRANSFORM(core::ir::transform::RemoveContinueInSwitch, module);

    // DemoteToHelper must come before any transform that introduces non-core instructions.
    RUN_TRANSFORM(core::ir::transform::DemoteToHelper, module);

    RUN_TRANSFORM(core::ir::transform::AddEmptyEntryPoint, module);

    RUN_TRANSFORM(raise::ShaderIO, module, raise::ShaderIOConfig{options.depth_range_offsets});

    RUN_TRANSFORM(core::ir::transform::Std140, module);

    // These transforms need to be run last as various transforms introduce terminator arguments,
    // naming conflicts, and expressions that need to be explicitly not inlined.
    RUN_TRANSFORM(core::ir::transform::RemoveTerminatorArgs, module);
    RUN_TRANSFORM(core::ir::transform::RenameConflicts, module);
    RUN_TRANSFORM(core::ir::transform::ValueToLet, module);

    return Success;
}

}  // namespace tint::glsl::writer