wasm-typer.h

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// Copyright 2022 the V8 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.
 
#ifndef V8_COMPILER_WASM_TYPER_H_
#define V8_COMPILER_WASM_TYPER_H_
 
#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif  // !V8_ENABLE_WEBASSEMBLY
 
#include "src/compiler/graph-reducer.h"
#include "src/compiler/wasm-graph-assembler.h"
 
namespace v8 {
namespace internal {
namespace compiler {
 
class MachineGraph;
 
// Recomputes wasm-gc types along the graph to assign the narrowest possible
// type to each node.
// Specifically, struct field accesses, array element accesses, phis, type
// casts, and type guards are retyped.
// Types in loops are computed to a fixed point.
class WasmTyper final : public AdvancedReducer {
 public:
  WasmTyper(Editor* editor, MachineGraph* mcgraph, uint32_t function_index);
 
  const char* reducer_name() const override { return "WasmTyper"; }
 
  Reduction Reduce(Node* node) final;
 
 private:
  uint32_t function_index_;
  Zone* graph_zone_;
};
 
}  // namespace compiler
}  // namespace internal
}  // namespace v8
 
#endif  // V8_COMPILER_WASM_TYPER_H_