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Remove -reduce-joining-phys-regs options. Make it on by default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35165 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -42,7 +42,6 @@ STATISTIC(numJoins , "Number of interval joins performed");
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STATISTIC(numPeep , "Number of identity moves eliminated after coalescing");
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STATISTIC(numFolded , "Number of loads/stores folded into instructions");
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STATISTIC(numAborts , "Number of times interval joining aborted");
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static cl::opt<bool> ReduceJoinPhys("reduce-joining-phy-regs", cl::Hidden);
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namespace {
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RegisterPass<LiveIntervals> X("liveintervals", "Live Interval Analysis");
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@ -937,8 +936,7 @@ bool LiveIntervals::JoinCopy(MachineInstr *CopyMI,
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// virtual register. Once the coalescing is done, it cannot be broken and
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// these are not spillable! If the destination interval uses are far away,
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// think twice about coalescing them!
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if (ReduceJoinPhys && !mopd->isDead() &&
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MRegisterInfo::isPhysicalRegister(repSrcReg)) {
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if (!mopd->isDead() && MRegisterInfo::isPhysicalRegister(repSrcReg)) {
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// Small function. No need to worry!
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unsigned Threshold = allocatableRegs_.count() * 2;
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if (r2iMap_.size() <= Threshold)
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