1 // Copyright 2021 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #if !V8_ENABLE_WEBASSEMBLY 6 #error This header should only be included if WebAssembly is enabled. 7 #endif // !V8_ENABLE_WEBASSEMBLY 8 9 #ifndef V8_COMPILER_WASM_ESCAPE_ANALYSIS_H_ 10 #define V8_COMPILER_WASM_ESCAPE_ANALYSIS_H_ 11 12 #include "src/compiler/graph-reducer.h" 13 14 namespace v8 { 15 namespace internal { 16 namespace compiler { 17 18 class MachineGraph; 19 20 // Eliminate allocated objects which are only assigned to. 21 // Current restrictions: Does not work for arrays (until they are also allocated 22 // with AllocateRaw). Does not work if the allocated object is passed to a phi. 23 class WasmEscapeAnalysis final : public AdvancedReducer { 24 public: WasmEscapeAnalysis(Editor * editor,MachineGraph * mcgraph)25 WasmEscapeAnalysis(Editor* editor, MachineGraph* mcgraph) 26 : AdvancedReducer(editor), mcgraph_(mcgraph) {} 27 reducer_name()28 const char* reducer_name() const override { return "WasmEscapeAnalysis"; } 29 30 Reduction Reduce(Node* node) final; 31 32 private: 33 Reduction ReduceAllocateRaw(Node* call); 34 MachineGraph* const mcgraph_; 35 }; 36 37 } // namespace compiler 38 } // namespace internal 39 } // namespace v8 40 41 #endif // V8_COMPILER_WASM_ESCAPE_ANALYSIS_H_ 42