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Remove -reduce-joining-phys-regs options. Make it on by default. 

llvm-svn: 35165
This commit is contained in:
Evan Cheng 2007-03-19 18:08:26 +00:00
parent 5a040c510b
commit 25d00d545d
1 changed files with 1 additions and 3 deletions
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4
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -42,7 +42,6 @@ STATISTIC(numJoins , "Number of interval joins performed");
STATISTIC(numPeep , "Number of identity moves eliminated after coalescing"); STATISTIC(numPeep , "Number of identity moves eliminated after coalescing");
STATISTIC(numFolded , "Number of loads/stores folded into instructions"); STATISTIC(numFolded , "Number of loads/stores folded into instructions");
STATISTIC(numAborts , "Number of times interval joining aborted"); STATISTIC(numAborts , "Number of times interval joining aborted");
static cl::opt<bool> ReduceJoinPhys("reduce-joining-phy-regs", cl::Hidden);
namespace { namespace {
RegisterPass<LiveIntervals> X("liveintervals", "Live Interval Analysis"); RegisterPass<LiveIntervals> X("liveintervals", "Live Interval Analysis");
@ -937,8 +936,7 @@ bool LiveIntervals::JoinCopy(MachineInstr *CopyMI,
// virtual register. Once the coalescing is done, it cannot be broken and // virtual register. Once the coalescing is done, it cannot be broken and
// these are not spillable! If the destination interval uses are far away, // these are not spillable! If the destination interval uses are far away,
// think twice about coalescing them! // think twice about coalescing them!
if (ReduceJoinPhys && !mopd->isDead() && if (!mopd->isDead() && MRegisterInfo::isPhysicalRegister(repSrcReg)) {
MRegisterInfo::isPhysicalRegister(repSrcReg)) {
// Small function. No need to worry! // Small function. No need to worry!
unsigned Threshold = allocatableRegs_.count() * 2; unsigned Threshold = allocatableRegs_.count() * 2;
if (r2iMap_.size() <= Threshold) if (r2iMap_.size() <= Threshold)