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[turbofan] Add RegisterAllocator::NewLiveRange() utility method.

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R=dcarney@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1036433002

Cr-Commit-Position: refs/heads/master@{#27405}
This commit is contained in:
titzer 2015-03-24 06:17:24 -07:00 committed by Commit bot
parent 00844d466b
commit 01269228b8
2 changed files with 14 additions and 8 deletions
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19
src/compiler/register-allocator.cc
View File

@ -736,15 +736,19 @@ InstructionOperand* RegisterAllocator::AllocateFixed(
}
LiveRange* RegisterAllocator::NewLiveRange(int index) {
// The LiveRange object itself can go in the local zone, but the
// InstructionOperand needs to go in the code zone, since it may survive
// register allocation.
return new (local_zone()) LiveRange(index, code_zone());
}
LiveRange* RegisterAllocator::FixedLiveRangeFor(int index) {
DCHECK(index < config()->num_general_registers());
auto result = fixed_live_ranges()[index];
if (result == nullptr) {
// TODO(titzer): add a utility method to allocate a new LiveRange:
// The LiveRange object itself can go in this zone, but the
// InstructionOperand needs
// to go in the code zone, since it may survive register allocation.
result = new (local_zone()) LiveRange(FixedLiveRangeID(index), code_zone());
result = NewLiveRange(FixedLiveRangeID(index));
DCHECK(result->IsFixed());
result->kind_ = GENERAL_REGISTERS;
SetLiveRangeAssignedRegister(result, index);
@ -758,8 +762,7 @@ LiveRange* RegisterAllocator::FixedDoubleLiveRangeFor(int index) {
DCHECK(index < config()->num_aliased_double_registers());
auto result = fixed_double_live_ranges()[index];
if (result == nullptr) {
result = new (local_zone())
LiveRange(FixedDoubleLiveRangeID(index), code_zone());
result = NewLiveRange(FixedDoubleLiveRangeID(index));
DCHECK(result->IsFixed());
result->kind_ = DOUBLE_REGISTERS;
SetLiveRangeAssignedRegister(result, index);
@ -775,7 +778,7 @@ LiveRange* RegisterAllocator::LiveRangeFor(int index) {
}
auto result = live_ranges()[index];
if (result == nullptr) {
result = new (local_zone()) LiveRange(index, code_zone());
result = NewLiveRange(index);
live_ranges()[index] = result;
}
return result;

3
src/compiler/register-allocator.h
View File

@ -470,6 +470,9 @@ class RegisterAllocator FINAL : public ZoneObject {
// Returns the register kind required by the given virtual register.
RegisterKind RequiredRegisterKind(int virtual_register) const;
// Creates a new live range.
LiveRange* NewLiveRange(int index);
// This zone is for InstructionOperands and moves that live beyond register
// allocation.
Zone* code_zone() const { return code()->zone(); }