void RegisterState::allocate(Location r) {
if (isRegister(r)) {
::allocateRegister(allocated, r);
}
else if (is_StackLocation(r)) {
assert(!isSet(stackAllocs[whichMask(r)], whichBit(r)),
"already allocated");
setNth(stackAllocs[whichMask(r)], whichBit(r));
fint tempNo = index_for_StackLocation(r) + 1;
if (tempNo >= stackDepth)
stackDepth = tempNo;
curDepth++;
assert(curDepth <= stackDepth, "curDepth too big");
}
}
void RegisterState::deallocate(Location r) {
if (isRegister(r)) {
::deallocateRegister(allocated, r);
allocated = ::allocate(allocated, permanent); // ensure we do not deallocate a permanent reg
}
else if (is_StackLocation(r)) {
if (isSet(stackPerms[whichMask(r)], whichBit(r))) {
// permanent -- don't deallocate
}
else {
assert(isSet(stackAllocs[whichMask(r)], whichBit(r)), "not allocated");
clearNth(stackAllocs[whichMask(r)], whichBit(r));
--curDepth;
assert(curDepth >= 0, "negative depth");
}
}
}
void RegisterState::allocate(Location r) {
if (isRegister(r)) {
::allocateRegister(allocated, r);
// allocate nonvols down from R31, must save/restore them, so track depth
_number_of_saved_nonvolatile_registers = max(_number_of_saved_nonvolatile_registers, 32 - r);
}
else if (is_StackLocation(r)) {
assert(!isSet(stackAllocs[whichMask(r)], whichBit(r)),
"already allocated");
setNth(stackAllocs[whichMask(r)], whichBit(r));
fint tempNo = index_for_StackLocation(r) + 1;
if (tempNo >= stackDepth)
stackDepth = tempNo;
curDepth++;
assert(curDepth <= stackDepth, "curDepth too big");
}
}
void RegisterState::allocatePermanent(Location r) {
if (isRegister(r)) {
::allocateRegister(permanent, r);
}
else if (is_StackLocation(r)) {
setNth(stackPerms[whichMask(r)], whichBit(r));
}
else {
// extra incoming arg etc -- ignore
}
allocate(r);
}