mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 03:02:36 +01:00
ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
82 lines
2.8 KiB
C++
82 lines
2.8 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"
|
|
#include "llvm/CodeGen/MachineBasicBlock.h"
|
|
#include "llvm/IR/BasicBlock.h"
|
|
|
|
namespace llvm {
|
|
|
|
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;
|
|
// For entry <A, B>, A is a BB with an instruction that may throw
|
|
// (invoke/cleanupret in LLVM IR, call/rethrow in the backend) and B is an EH
|
|
// pad that A unwinds to.
|
|
DenseMap<BBOrMBB, BBOrMBB> ThrowUnwindMap;
|
|
|
|
// 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;
|
|
}
|
|
const BasicBlock *getThrowUnwindDest(BasicBlock *BB) const {
|
|
return ThrowUnwindMap.lookup(BB).get<const BasicBlock *>();
|
|
}
|
|
void setThrowUnwindDest(const BasicBlock *BB, const BasicBlock *Dest) {
|
|
ThrowUnwindMap[BB] = Dest;
|
|
}
|
|
bool hasEHPadUnwindDest(const BasicBlock *BB) const {
|
|
return EHPadUnwindMap.count(BB);
|
|
}
|
|
bool hasThrowUnwindDest(const BasicBlock *BB) const {
|
|
return ThrowUnwindMap.count(BB);
|
|
}
|
|
|
|
MachineBasicBlock *getEHPadUnwindDest(MachineBasicBlock *MBB) const {
|
|
return EHPadUnwindMap.lookup(MBB).get<MachineBasicBlock *>();
|
|
}
|
|
void setEHPadUnwindDest(MachineBasicBlock *MBB, MachineBasicBlock *Dest) {
|
|
EHPadUnwindMap[MBB] = Dest;
|
|
}
|
|
MachineBasicBlock *getThrowUnwindDest(MachineBasicBlock *MBB) const {
|
|
return ThrowUnwindMap.lookup(MBB).get<MachineBasicBlock *>();
|
|
}
|
|
void setThrowUnwindDest(MachineBasicBlock *MBB, MachineBasicBlock *Dest) {
|
|
ThrowUnwindMap[MBB] = Dest;
|
|
}
|
|
bool hasEHPadUnwindDest(MachineBasicBlock *MBB) const {
|
|
return EHPadUnwindMap.count(MBB);
|
|
}
|
|
bool hasThrowUnwindDest(MachineBasicBlock *MBB) const {
|
|
return ThrowUnwindMap.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
|