AuroraMiddleware/v8
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[turbofan] removed some dead code.

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In a previous incarnation of live range merging, we needed to cache the
last child in a chain of live ranges. We don't anymore, so removing
unused code.

BUG=

Review URL: https://codereview.chromium.org/1536523003

Cr-Commit-Position: refs/heads/master@{#32931}
This commit is contained in:
mtrofin 2015-12-17 00:48:40 -08:00 committed by Commit bot
parent fe7001ab48
commit ea9ecff0e3
2 changed files with 0 additions and 17 deletions
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13
src/compiler/register-allocator.cc
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@ -441,9 +441,6 @@ LiveRange* LiveRange::SplitAt(LifetimePosition position, Zone* zone) {
child->top_level_ = TopLevel();
child->next_ = next_;
next_ = child;
if (child->next() == nullptr) {
TopLevel()->set_last_child(child);
}
return child;
}
@ -540,15 +537,6 @@ UsePosition* LiveRange::DetachAt(LifetimePosition position, LiveRange* result,
}
void LiveRange::AppendAsChild(TopLevelLiveRange* other) {
next_ = other;
other->UpdateParentForAllChildren(TopLevel());
TopLevel()->UpdateSpillRangePostMerge(other);
TopLevel()->set_last_child(other->last_child());
}
void LiveRange::UpdateParentForAllChildren(TopLevelLiveRange* new_top_level) {
LiveRange* child = this;
for (; child != nullptr; child = child->next()) {
@ -709,7 +697,6 @@ TopLevelLiveRange::TopLevelLiveRange(int vreg, MachineRepresentation rep)
spill_move_insertion_locations_(nullptr),
spilled_in_deferred_blocks_(false),
spill_start_index_(kMaxInt),
last_child_(this),
last_pos_(nullptr),
splinter_(nullptr),
has_preassigned_slot_(false) {

4
src/compiler/register-allocator.h
View File

@ -423,7 +423,6 @@ class LiveRange : public ZoneObject {
explicit LiveRange(int relative_id, MachineRepresentation rep,
TopLevelLiveRange* top_level);
void AppendAsChild(TopLevelLiveRange* other);
void UpdateParentForAllChildren(TopLevelLiveRange* new_top_level);
void set_spilled(bool value) { bits_ = SpilledField::update(bits_, value); }
@ -610,8 +609,6 @@ class TopLevelLiveRange final : public LiveRange {
SpillMoveInsertionList* spill_move_insertion_locations() const {
return spill_move_insertion_locations_;
}
void set_last_child(LiveRange* range) { last_child_ = range; }
LiveRange* last_child() const { return last_child_; }
TopLevelLiveRange* splinter() const { return splinter_; }
void SetSplinter(TopLevelLiveRange* splinter) {
DCHECK_NULL(splinter_);
@ -647,7 +644,6 @@ class TopLevelLiveRange final : public LiveRange {
// just for spill in a single deferred block.
bool spilled_in_deferred_blocks_;
int spill_start_index_;
LiveRange* last_child_;
UsePosition* last_pos_;
TopLevelLiveRange* splinter_;
bool has_preassigned_slot_;