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#pragma once
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Module.h"
#include <map>
#include <vector>
namespace cps {
// C++ ABI exception emission. State is keyed by function because file helper
// bodies and user functions are emitted using the same builder as their caller.
class ExceptionHandler {
struct Handler {
llvm::BasicBlock *Target;
llvm::AllocaInst *Exception;
unsigned CatchDepth;
};
struct FunctionState {
std::vector<Handler> Handlers;
unsigned CatchDepth = 0;
};
llvm::LLVMContext &Context;
llvm::IRBuilder<> &Builder;
llvm::Module &Module;
std::map<llvm::Function *, FunctionState> States;
llvm::FunctionCallee Allocate, Throw, BeginCatch, EndCatch, Personality;
llvm::GlobalVariable *IntTypeInfo = nullptr;
void ensureRuntime();
llvm::BasicBlock *emitUnwindDestination();
public:
ExceptionHandler(llvm::LLVMContext &C, llvm::IRBuilder<> &B, llvm::Module &M)
: Context(C), Builder(B), Module(M) {}
void prepareFunction(llvm::Function *F);
void pushHandler(llvm::BasicBlock *Target);
llvm::AllocaInst *popHandler();
void beginCatch(llvm::AllocaInst *Exception);
void endCatch();
void emitReturnCleanup();
llvm::Value *emitCall(llvm::FunctionCallee Callee, llvm::ArrayRef<llvm::Value *> Args,
const llvm::Twine &Name = "");
void emitThrow();
};
} // namespace cps
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