void
RegAlloc::reset() {
TRACE(1, ">>> regalloc reset! <<<\n");
m_epoch = 0;
m_contToRegMap.clear();
// m_info is sparse.
for (int i = 0; i < kMaxRegs; ++i) {
m_info[i].m_epoch = 0;
m_info[i].m_pReg = PhysReg(i);
m_info[i].m_cont = RegContent();
m_info[i].m_type = KindOfInvalid;
m_info[i].m_state = RegInfo::INVALID;
}
RegSet all = m_allRegs;
PhysReg pr;
for (int i = 0; all.findFirst(pr); i++) {
all.remove(pr);
physRegToInfo(pr)->m_pReg = PhysReg(pr);
stateTransition(physRegToInfo(pr), RegInfo::FREE);
// Put the most favorable register last, so it is picked first.
m_lru[(m_numRegs - 1) - i] = pr;
}
m_branchSynced = false;
verify();
}
void
RegAlloc::invalidate(const Location& loc) {
ContToRegMap::iterator i = m_contToRegMap.find(RegContent(loc));
if (i != m_contToRegMap.end()) {
freeRegInfo(physRegToInfo(i->second));
}
}
void
RegAlloc::markAsClean(const Location& loc) {
PhysReg pr = mapGet(m_contToRegMap, RegContent(loc), InvalidReg);
if (pr != InvalidReg) {
stateTransition(physRegToInfo(pr), RegInfo::CLEAN);
}
}
PhysReg
RegAlloc::getReg(const Location& loc) {
PhysReg reg = mapGet(m_contToRegMap, RegContent(loc), InvalidReg);
lruFront(physRegToInfo(reg));
ASSERT(reg != InvalidReg); // Usage error; didn't call allocInputRegs()?
return reg;
}
void
RegAlloc::cleanReg(PhysReg reg) {
RegInfo* r = physRegToInfo(reg);
if (r->m_state == RegInfo::DIRTY) {
spill(r);
stateTransition(r, RegInfo::CLEAN);
}
}
