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reg_alloc: UseHostLoc is no longer necessary

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This commit is contained in:
MerryMage 2017-02-24 19:59:34 +00:00
parent 9518bbe06e
commit 640faab8a7
2 changed files with 0 additions and 37 deletions
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36
src/backend_x64/reg_alloc.cpp
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@ -338,42 +338,6 @@ void RegAlloc::Reset() {
hostloc_info.fill({});
}
std::tuple<HostLoc, bool> RegAlloc::UseHostLoc(IR::Inst* use_inst, HostLocList desired_locations) {
DEBUG_ASSERT(std::all_of(desired_locations.begin(), desired_locations.end(), HostLocIsRegister));
DEBUG_ASSERT_MSG(ValueLocation(use_inst), "use_inst has not been defined");
HostLoc current_location = *ValueLocation(use_inst);
auto iter = std::find(desired_locations.begin(), desired_locations.end(), current_location);
if (iter != desired_locations.end()) {
bool was_being_used = LocInfo(current_location).IsLocked();
ASSERT(LocInfo(current_location).IsUse() || LocInfo(current_location).IsIdle());
LocInfo(current_location).Lock();
use_inst->DecrementRemainingUses();
DEBUG_ASSERT(LocInfo(current_location).IsUse());
return std::make_tuple(current_location, was_being_used);
}
if (HostLocIsSpill(current_location)) {
bool was_being_used = LocInfo(current_location).IsLocked();
LocInfo(current_location).Lock();
use_inst->DecrementRemainingUses();
DEBUG_ASSERT(LocInfo(current_location).IsUse());
return std::make_tuple(current_location, was_being_used);
} else if (HostLocIsRegister(current_location)) {
HostLoc new_location = SelectARegister(desired_locations);
ASSERT(LocInfo(current_location).IsIdle());
EmitExchange(code, new_location, current_location);
std::swap(LocInfo(new_location), LocInfo(current_location));
LocInfo(new_location).Lock();
use_inst->DecrementRemainingUses();
DEBUG_ASSERT(LocInfo(new_location).IsUse());
return std::make_tuple(new_location, false);
}
ASSERT_MSG(false, "Invalid current_location");
return std::make_tuple(static_cast<HostLoc>(-1), false);
}
HostLoc RegAlloc::LoadImmediateIntoHostLocReg(IR::Value imm, HostLoc host_loc) {
ASSERT_MSG(imm.IsImmediate(), "imm is not an immediate");

1
src/backend_x64/reg_alloc.h
View file

@ -148,7 +148,6 @@ private:
std::tuple<OpArg, HostLoc> UseDefOpArgHostLocReg(IR::Value use_value, IR::Inst* def_inst, HostLocList desired_locations);
HostLoc UseHostLocReg(IR::Value use_value, HostLocList desired_locations);
HostLoc UseHostLocReg(IR::Inst* use_inst, HostLocList desired_locations);
std::tuple<HostLoc, bool> UseHostLoc(IR::Inst* use_inst, HostLocList desired_locations);
HostLoc UseScratchHostLocReg(IR::Value use_value, HostLocList desired_locations);
HostLoc UseScratchHostLocReg(IR::Inst* use_inst, HostLocList desired_locations);
HostLoc ScratchHostLocReg(HostLocList desired_locations);