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Remove the -compact-regions flag.

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It has been enabled by default for a while, it was only there to allow
performance comparisons.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139501 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-09-12 16:54:42 +00:00
parent 708d06f7fb
commit a16a25ddea
1 changed files with 5 additions and 11 deletions
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16
lib/CodeGen/RegAllocGreedy.cpp
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@ -51,8 +51,6 @@ STATISTIC(NumGlobalSplits, "Number of split global live ranges");
STATISTIC(NumLocalSplits, "Number of split local live ranges");
STATISTIC(NumEvicted, "Number of interferences evicted");
static cl::opt<bool> CompactRegions("compact-regions", cl::init(true));
static cl::opt<SplitEditor::ComplementSpillMode>
SplitSpillMode("split-spill-mode", cl::Hidden,
cl::desc("Spill mode for splitting live ranges"),
@ -410,15 +408,11 @@ void RAGreedy::enqueue(LiveInterval *LI) {
if (ExtraRegInfo[Reg].Stage == RS_Split) {
// Unsplit ranges that couldn't be allocated immediately are deferred until
// everything else has been allocated. Long ranges are allocated last so
// they are split against realistic interference.
if (CompactRegions)
Prio = Size;
else
Prio = (1u << 31) - Size;
// everything else has been allocated.
Prio = Size;
} else {
// Everything else is allocated in long->short order. Long ranges that don't
// fit should be spilled ASAP so they don't create interference.
// Everything is allocated in long->short order. Long ranges that don't fit
// should be spilled (or split) ASAP so they don't create interference.
Prio = (1u << 31) + Size;
// Boost ranges that have a physical register hint.
@ -1092,7 +1086,7 @@ unsigned RAGreedy::tryRegionSplit(LiveInterval &VirtReg, AllocationOrder &Order,
SmallVector<unsigned, 8> UsedCands;
// Check if we can split this live range around a compact region.
bool HasCompact = CompactRegions && calcCompactRegion(GlobalCand.front());
bool HasCompact = calcCompactRegion(GlobalCand.front());
if (HasCompact) {
// Yes, keep GlobalCand[0] as the compact region candidate.
NumCands = 1;