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//===- lib/MC/MCModule.cpp - MCModule implementation ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCModule.h"
#include "llvm/MC/MCAtom.h"
#include "llvm/MC/MCFunction.h"
#include <algorithm>
using namespace llvm;
static bool AtomComp(const MCAtom *L, uint64_t Addr) {
return L->getEndAddr() < Addr;
}
static bool AtomCompInv(uint64_t Addr, const MCAtom *R) {
return Addr < R->getEndAddr();
}
void MCModule::map(MCAtom *NewAtom) {
uint64_t Begin = NewAtom->Begin;
assert(Begin <= NewAtom->End && "Creating MCAtom with endpoints reversed?");
// Check for atoms already covering this range.
AtomListTy::iterator I = std::lower_bound(atom_begin(), atom_end(),
Begin, AtomComp);
assert((I == atom_end() || (*I)->getBeginAddr() > NewAtom->End)
&& "Offset range already occupied!");
// Insert the new atom to the list.
Atoms.insert(I, NewAtom);
}
MCTextAtom *MCModule::createTextAtom(uint64_t Begin, uint64_t End) {
MCTextAtom *NewAtom = new MCTextAtom(this, Begin, End);
map(NewAtom);
return NewAtom;
}
MCDataAtom *MCModule::createDataAtom(uint64_t Begin, uint64_t End) {
MCDataAtom *NewAtom = new MCDataAtom(this, Begin, End);
map(NewAtom);
return NewAtom;
}
// remap - Update the interval mapping for an atom.
void MCModule::remap(MCAtom *Atom, uint64_t NewBegin, uint64_t NewEnd) {
// Find and erase the old mapping.
AtomListTy::iterator I = std::lower_bound(atom_begin(), atom_end(),
Atom->Begin, AtomComp);
assert(I != atom_end() && "Atom offset not found in module!");
assert(*I == Atom && "Previous atom mapping was invalid!");
Atoms.erase(I);
// FIXME: special case NewBegin == Atom->Begin
// Insert the new mapping.
AtomListTy::iterator NewI = std::lower_bound(atom_begin(), atom_end(),
NewBegin, AtomComp);
assert((NewI == atom_end() || (*NewI)->getBeginAddr() > Atom->End)
&& "Offset range already occupied!");
Atoms.insert(NewI, Atom);
// Update the atom internal bounds.
Atom->Begin = NewBegin;
Atom->End = NewEnd;
}
const MCAtom *MCModule::findAtomContaining(uint64_t Addr) const {
AtomListTy::const_iterator I = std::lower_bound(atom_begin(), atom_end(),
Addr, AtomComp);
if (I != atom_end() && (*I)->getBeginAddr() <= Addr)
return *I;
return nullptr;
}
MCAtom *MCModule::findAtomContaining(uint64_t Addr) {
return const_cast<MCAtom*>(
const_cast<const MCModule *>(this)->findAtomContaining(Addr));
}
const MCAtom *MCModule::findFirstAtomAfter(uint64_t Addr) const {
AtomListTy::const_iterator I = std::upper_bound(atom_begin(), atom_end(),
Addr, AtomCompInv);
if (I != atom_end())
return *I;
return nullptr;
}
MCAtom *MCModule::findFirstAtomAfter(uint64_t Addr) {
return const_cast<MCAtom*>(
const_cast<const MCModule *>(this)->findFirstAtomAfter(Addr));
}
MCFunction *MCModule::createFunction(StringRef Name) {
std::unique_ptr<MCFunction> MCF(new MCFunction(Name, this));
Functions.push_back(std::move(MCF));
return Functions.back().get();
}
static bool CompBBToAtom(MCBasicBlock *BB, const MCTextAtom *Atom) {
return BB->getInsts() < Atom;
}
void MCModule::splitBasicBlocksForAtom(const MCTextAtom *TA,
const MCTextAtom *NewTA) {
BBsByAtomTy::iterator
I = std::lower_bound(BBsByAtom.begin(), BBsByAtom.end(),
TA, CompBBToAtom);
for (; I != BBsByAtom.end() && (*I)->getInsts() == TA; ++I) {
MCBasicBlock *BB = *I;
MCBasicBlock *NewBB = &BB->getParent()->createBlock(*NewTA);
BB->splitBasicBlock(NewBB);
}
}
void MCModule::trackBBForAtom(const MCTextAtom *Atom, MCBasicBlock *BB) {
assert(Atom == BB->getInsts() && "Text atom doesn't back the basic block!");
BBsByAtomTy::iterator I = std::lower_bound(BBsByAtom.begin(),
BBsByAtom.end(),
Atom, CompBBToAtom);
for (; I != BBsByAtom.end() && (*I)->getInsts() == Atom; ++I)
if (*I == BB)
return;
BBsByAtom.insert(I, BB);
}
MCModule::MCModule() : Entrypoint(0) { }
MCModule::~MCModule() {
for (AtomListTy::iterator AI = atom_begin(),
AE = atom_end();
AI != AE; ++AI)
delete *AI;
}
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