64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
|
//===--- llvm/CodeGen/WasmEHFuncInfo.h --------------------------*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// Data structures for Wasm exception handling schemes.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef LLVM_CODEGEN_WASMEHFUNCINFO_H
|
||
|
|
#define LLVM_CODEGEN_WASMEHFUNCINFO_H
|
||
|
|
|
||
|
|
#include "llvm/ADT/DenseMap.h"
|
||
|
|
#include "llvm/ADT/PointerUnion.h"
|
||
|
|
|
||
|
|
namespace llvm {
|
||
|
|
|
||
|
|
class BasicBlock;
|
||
|
|
class Function;
|
||
|
|
class MachineBasicBlock;
|
||
|
|
|
||
|
|
namespace WebAssembly {
|
||
|
|
enum EventTag { CPP_EXCEPTION = 0, C_LONGJMP = 1 };
|
||
|
|
}
|
||
|
|
|
||
|
|
using BBOrMBB = PointerUnion<const BasicBlock *, MachineBasicBlock *>;
|
||
|
|
|
||
|
|
struct WasmEHFuncInfo {
|
||
|
|
// When there is an entry <A, B>, if an exception is not caught by A, it
|
||
|
|
// should next unwind to the EH pad B.
|
||
|
|
DenseMap<BBOrMBB, BBOrMBB> EHPadUnwindMap;
|
||
|
|
|
||
|
|
// Helper functions
|
||
|
|
const BasicBlock *getEHPadUnwindDest(const BasicBlock *BB) const {
|
||
|
|
return EHPadUnwindMap.lookup(BB).get<const BasicBlock *>();
|
||
|
|
}
|
||
|
|
void setEHPadUnwindDest(const BasicBlock *BB, const BasicBlock *Dest) {
|
||
|
|
EHPadUnwindMap[BB] = Dest;
|
||
|
|
}
|
||
|
|
bool hasEHPadUnwindDest(const BasicBlock *BB) const {
|
||
|
|
return EHPadUnwindMap.count(BB);
|
||
|
|
}
|
||
|
|
|
||
|
|
MachineBasicBlock *getEHPadUnwindDest(MachineBasicBlock *MBB) const {
|
||
|
|
return EHPadUnwindMap.lookup(MBB).get<MachineBasicBlock *>();
|
||
|
|
}
|
||
|
|
void setEHPadUnwindDest(MachineBasicBlock *MBB, MachineBasicBlock *Dest) {
|
||
|
|
EHPadUnwindMap[MBB] = Dest;
|
||
|
|
}
|
||
|
|
bool hasEHPadUnwindDest(MachineBasicBlock *MBB) const {
|
||
|
|
return EHPadUnwindMap.count(MBB);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Analyze the IR in the given function to build WasmEHFuncInfo.
|
||
|
|
void calculateWasmEHInfo(const Function *F, WasmEHFuncInfo &EHInfo);
|
||
|
|
|
||
|
|
} // namespace llvm
|
||
|
|
|
||
|
|
#endif // LLVM_CODEGEN_WASMEHFUNCINFO_H
|