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// Copyright 2020 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "src/tint/lang/spirv/reader/ast_parser/parse.h"
#include <utility>
#include "src/tint/lang/spirv/reader/ast_lower/atomics.h"
#include "src/tint/lang/spirv/reader/ast_lower/decompose_strided_array.h"
#include "src/tint/lang/spirv/reader/ast_lower/decompose_strided_matrix.h"
#include "src/tint/lang/spirv/reader/ast_lower/fold_trivial_lets.h"
#include "src/tint/lang/spirv/reader/ast_lower/pass_workgroup_id_as_argument.h"
#include "src/tint/lang/spirv/reader/ast_parser/ast_parser.h"
#include "src/tint/lang/wgsl/ast/transform/manager.h"
#include "src/tint/lang/wgsl/ast/transform/remove_unreachable_statements.h"
#include "src/tint/lang/wgsl/ast/transform/simplify_pointers.h"
#include "src/tint/lang/wgsl/ast/transform/unshadow.h"
#include "src/tint/lang/wgsl/extension.h"
#include "src/tint/lang/wgsl/program/clone_context.h"
#include "src/tint/lang/wgsl/resolver/resolve.h"
namespace tint::spirv::reader::ast_parser {
namespace {
/// Trivial transform that removes the enable directive that disables the uniformity analysis.
class ReenableUniformityAnalysis final
: public Castable<ReenableUniformityAnalysis, ast::transform::Transform> {
public:
ReenableUniformityAnalysis() {}
~ReenableUniformityAnalysis() override {}
/// @copydoc ast::transform::Transform::Apply
ApplyResult Apply(const Program& src,
const ast::transform::DataMap&,
ast::transform::DataMap&) const override {
ProgramBuilder b;
program::CloneContext ctx = {&b, &src, /* auto_clone_symbols */ true};
// Remove the extension that disables the uniformity analysis.
for (auto* enable : src.AST().Enables()) {
if (enable->HasExtension(wgsl::Extension::kChromiumDisableUniformityAnalysis) &&
enable->extensions.Length() == 1u) {
ctx.Remove(src.AST().GlobalDeclarations(), enable);
}
}
ctx.Clone();
return resolver::Resolve(b);
}
};
} // namespace
Program Parse(const std::vector<uint32_t>& input, const Options& options) {
ASTParser parser(input);
bool parsed = parser.Parse();
ProgramBuilder& builder = parser.builder();
if (!parsed) {
// TODO(bclayton): Migrate ASTParser to using diagnostics.
builder.Diagnostics().add_error(diag::System::Reader, parser.error());
return Program(std::move(builder));
}
if (options.allow_non_uniform_derivatives) {
// Suppress errors regarding non-uniform derivative operations if requested, by adding a
// diagnostic directive to the module.
builder.DiagnosticDirective(wgsl::DiagnosticSeverity::kOff, "derivative_uniformity");
}
// Disable the uniformity analysis temporarily.
// We will run transforms that attempt to change the AST to satisfy the analysis.
auto allowed_features = options.allowed_features;
allowed_features.extensions.insert(wgsl::Extension::kChromiumDisableUniformityAnalysis);
builder.Enable(wgsl::Extension::kChromiumDisableUniformityAnalysis);
// The SPIR-V parser can construct disjoint AST nodes, which is invalid for
// the Resolver. Clone the Program to clean these up.
Program program_with_disjoint_ast(std::move(builder));
ProgramBuilder output;
program::CloneContext(&output, &program_with_disjoint_ast, false).Clone();
auto program = Program(resolver::Resolve(output, allowed_features));
if (!program.IsValid()) {
return program;
}
ast::transform::Manager manager;
ast::transform::DataMap outputs;
manager.Add<ast::transform::Unshadow>();
manager.Add<ast::transform::SimplifyPointers>();
manager.Add<FoldTrivialLets>();
manager.Add<PassWorkgroupIdAsArgument>();
manager.Add<DecomposeStridedMatrix>();
manager.Add<DecomposeStridedArray>();
manager.Add<ast::transform::RemoveUnreachableStatements>();
manager.Add<Atomics>();
manager.Add<ReenableUniformityAnalysis>();
return manager.Run(program, {}, outputs);
}
} // namespace tint::spirv::reader::ast_parser
TINT_INSTANTIATE_TYPEINFO(tint::spirv::reader::ast_parser::ReenableUniformityAnalysis);