blob: 1f8e01b5e698f27783de72cb39cb7573c07519b1 [file] [log] [blame]
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/locations.h"
#include "vm/assembler.h"
#include "vm/il_printer.h"
#include "vm/intermediate_language.h"
#include "vm/flow_graph_compiler.h"
namespace dart {
LocationSummary::LocationSummary(intptr_t input_count,
intptr_t temp_count,
LocationSummary::ContainsCall contains_call)
: input_locations_(input_count),
temp_locations_(temp_count),
output_location_(),
stack_bitmap_(NULL),
contains_call_(contains_call),
live_registers_() {
for (intptr_t i = 0; i < input_count; i++) {
input_locations_.Add(Location());
}
for (intptr_t i = 0; i < temp_count; i++) {
temp_locations_.Add(Location());
}
if (contains_call_ != kNoCall) {
stack_bitmap_ = new BitmapBuilder();
}
}
LocationSummary* LocationSummary::Make(
intptr_t input_count,
Location out,
LocationSummary::ContainsCall contains_call) {
LocationSummary* summary = new LocationSummary(input_count, 0, contains_call);
for (intptr_t i = 0; i < input_count; i++) {
summary->set_in(i, Location::RequiresRegister());
}
summary->set_out(out);
return summary;
}
Location Location::RegisterOrConstant(Value* value) {
ConstantInstr* constant = value->definition()->AsConstant();
return (constant != NULL)
? Location::Constant(constant->value())
: Location::RequiresRegister();
}
Location Location::RegisterOrSmiConstant(Value* value) {
ConstantInstr* constant = value->definition()->AsConstant();
return ((constant != NULL) && constant->value().IsSmi())
? Location::Constant(constant->value())
: Location::RequiresRegister();
}
Location Location::FixedRegisterOrConstant(Value* value, Register reg) {
ConstantInstr* constant = value->definition()->AsConstant();
return (constant != NULL)
? Location::Constant(constant->value())
: Location::RegisterLocation(reg);
}
Location Location::FixedRegisterOrSmiConstant(Value* value, Register reg) {
ConstantInstr* constant = value->definition()->AsConstant();
return ((constant != NULL) && constant->value().IsSmi())
? Location::Constant(constant->value())
: Location::RegisterLocation(reg);
}
Location Location::AnyOrConstant(Value* value) {
ConstantInstr* constant = value->definition()->AsConstant();
return (constant != NULL)
? Location::Constant(constant->value())
: Location::Any();
}
Address Location::ToStackSlotAddress() const {
const intptr_t index = stack_index();
if (index < 0) {
const intptr_t offset = (kLastParamSlotIndex - index - 1) * kWordSize;
return Address(FPREG, offset);
} else {
const intptr_t offset = (kFirstLocalSlotIndex - index) * kWordSize;
return Address(FPREG, offset);
}
}
const char* Location::Name() const {
switch (kind()) {
case kInvalid: return "?";
case kRegister: return Assembler::RegisterName(reg());
case kFpuRegister: return Assembler::FpuRegisterName(fpu_reg());
case kStackSlot: return "S";
case kDoubleStackSlot: return "DS";
case kQuadStackSlot: return "QS";
case kUnallocated:
switch (policy()) {
case kAny:
return "A";
case kPrefersRegister:
return "P";
case kRequiresRegister:
return "R";
case kRequiresFpuRegister:
return "DR";
case kWritableRegister:
return "WR";
case kSameAsFirstInput:
return "0";
}
UNREACHABLE();
default:
ASSERT(IsConstant());
return "C";
}
return "?";
}
void Location::PrintTo(BufferFormatter* f) const {
if (kind() == kStackSlot) {
f->Print("S%+"Pd"", stack_index());
} else if (kind() == kDoubleStackSlot) {
f->Print("DS%+"Pd"", stack_index());
} else {
f->Print("%s", Name());
}
}
void Location::Print() const {
if (kind() == kStackSlot) {
OS::Print("S%+"Pd"", stack_index());
} else {
OS::Print("%s", Name());
}
}
void LocationSummary::PrintTo(BufferFormatter* f) const {
if (input_count() > 0) {
f->Print(" (");
for (intptr_t i = 0; i < input_count(); i++) {
if (i != 0) f->Print(", ");
in(i).PrintTo(f);
}
f->Print(")");
}
if (temp_count() > 0) {
f->Print(" [");
for (intptr_t i = 0; i < temp_count(); i++) {
if (i != 0) f->Print(", ");
temp(i).PrintTo(f);
}
f->Print("]");
}
if (!out().IsInvalid()) {
f->Print(" => ");
out().PrintTo(f);
}
if (always_calls()) f->Print(" C");
}
} // namespace dart