mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
87 lines
3.2 KiB
C++
87 lines
3.2 KiB
C++
//===--- GenControl.cpp - IR Generation for Control Flow ------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See http://swift.org/LICENSE.txt for license information
|
|
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements general IR generation for control flow.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/OwningPtr.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/Support/CallSite.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "Cleanup.h"
|
|
#include "IRGenFunction.h"
|
|
#include "IRGenModule.h"
|
|
|
|
using namespace swift;
|
|
using namespace irgen;
|
|
|
|
/// Insert the given basic block after the IP block and move the
|
|
/// insertion point to it. Only valid if the IP is valid.
|
|
void IRBuilder::emitBlock(llvm::BasicBlock *BB) {
|
|
assert(ClearedIP == nullptr);
|
|
llvm::BasicBlock *CurBB = GetInsertBlock();
|
|
assert(CurBB && "current insertion point is invalid");
|
|
CurBB->getParent()->getBasicBlockList().insertAfter(CurBB, BB);
|
|
IRBuilderBase::SetInsertPoint(BB);
|
|
}
|
|
|
|
/// Create a new basic block with the given name. The block is not
|
|
/// automatically inserted into the function.
|
|
llvm::BasicBlock *
|
|
IRGenFunction::createBasicBlock(const llvm::Twine &Name) {
|
|
return llvm::BasicBlock::Create(IGM.getLLVMContext(), Name);
|
|
}
|
|
|
|
/// Get or create the jump-destination variable.
|
|
llvm::Value *IRGenFunction::getJumpDestSlot() {
|
|
if (JumpDestSlot) return JumpDestSlot;
|
|
|
|
JumpDestSlot = new llvm::AllocaInst(IGM.Int32Ty, "jumpdest.var", AllocaIP);
|
|
return JumpDestSlot;
|
|
}
|
|
|
|
/// Get or create the unreachable block.
|
|
llvm::BasicBlock *IRGenFunction::getUnreachableBlock() {
|
|
if (UnreachableBB) return UnreachableBB;
|
|
|
|
// Create it at the very end of the function.
|
|
UnreachableBB = createBasicBlock("unreachable");
|
|
new llvm::UnreachableInst(UnreachableBB->getContext(), UnreachableBB);
|
|
CurFn->getBasicBlockList().push_back(UnreachableBB);
|
|
|
|
return UnreachableBB;
|
|
}
|
|
|
|
//****************************************************************************//
|
|
//******************************* EXCEPTIONS *********************************//
|
|
//****************************************************************************//
|
|
|
|
llvm::CallSite IRGenFunction::emitInvoke(llvm::CallingConv::ID convention,
|
|
llvm::Value *fn,
|
|
ArrayRef<llvm::Value*> args,
|
|
const llvm::AttributeSet &attrs) {
|
|
// TODO: exceptions!
|
|
llvm::CallInst *call = Builder.CreateCall(fn, args);
|
|
call->setAttributes(attrs);
|
|
call->setCallingConv(convention);
|
|
return call;
|
|
}
|
|
|
|
//****************************************************************************//
|
|
//******************************** CLEANUPS **********************************//
|
|
//****************************************************************************//
|
|
|
|
|
|
// Anchor the Cleanup v-table in this translation unit.
|
|
void Cleanup::_anchor() {}
|