llvm-6502/lib/MC/MCFunction.cpp
2014-04-15 04:56:29 +00:00

77 lines
2.3 KiB
C++

//===-- lib/MC/MCFunction.cpp -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCFunction.h"
#include "llvm/MC/MCAtom.h"
#include "llvm/MC/MCModule.h"
#include <algorithm>
using namespace llvm;
// MCFunction
MCFunction::MCFunction(StringRef Name, MCModule *Parent)
: Name(Name), ParentModule(Parent)
{}
MCBasicBlock &MCFunction::createBlock(const MCTextAtom &TA) {
std::unique_ptr<MCBasicBlock> MCBB(new MCBasicBlock(TA, this));
Blocks.push_back(std::move(MCBB));
return *Blocks.back();
}
MCBasicBlock *MCFunction::find(uint64_t StartAddr) {
for (const_iterator I = begin(), E = end(); I != E; ++I)
if ((*I)->getInsts()->getBeginAddr() == StartAddr)
return I->get();
return nullptr;
}
const MCBasicBlock *MCFunction::find(uint64_t StartAddr) const {
return const_cast<MCFunction *>(this)->find(StartAddr);
}
// MCBasicBlock
MCBasicBlock::MCBasicBlock(const MCTextAtom &Insts, MCFunction *Parent)
: Insts(&Insts), Parent(Parent) {
getParent()->getParent()->trackBBForAtom(&Insts, this);
}
void MCBasicBlock::addSuccessor(const MCBasicBlock *MCBB) {
if (!isSuccessor(MCBB))
Successors.push_back(MCBB);
}
bool MCBasicBlock::isSuccessor(const MCBasicBlock *MCBB) const {
return std::find(Successors.begin(), Successors.end(),
MCBB) != Successors.end();
}
void MCBasicBlock::addPredecessor(const MCBasicBlock *MCBB) {
if (!isPredecessor(MCBB))
Predecessors.push_back(MCBB);
}
bool MCBasicBlock::isPredecessor(const MCBasicBlock *MCBB) const {
return std::find(Predecessors.begin(), Predecessors.end(),
MCBB) != Predecessors.end();
}
void MCBasicBlock::splitBasicBlock(MCBasicBlock *SplitBB) {
assert(Insts->getEndAddr() + 1 == SplitBB->Insts->getBeginAddr() &&
"Splitting unrelated basic blocks!");
SplitBB->addPredecessor(this);
assert(SplitBB->Successors.empty() &&
"Split basic block shouldn't already have successors!");
SplitBB->Successors = Successors;
Successors.clear();
addSuccessor(SplitBB);
}