diff options
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index bd8137730b..b2121c937d 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -36,6 +36,12 @@ #include <cmath> using namespace llvm; +namespace { + // Hidden options for help debugging. + cl::opt<bool> DisableReMat("disable-rematerialization", + cl::init(false), cl::Hidden); +} + STATISTIC(numIntervals, "Number of original intervals"); STATISTIC(numIntervalsAfter, "Number of intervals after coalescing"); STATISTIC(numFolded , "Number of loads/stores folded into instructions"); @@ -201,6 +207,9 @@ static bool isReDefinedByTwoAddr(MachineInstr *MI, unsigned Reg, /// val# of the specified interval is re-materializable. bool LiveIntervals::isReMaterializable(const LiveInterval &li, unsigned ValNum, MachineInstr *MI) { + if (DisableReMat) + return false; + if (tii_->isTriviallyReMaterializable(MI)) return true; @@ -610,7 +619,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, DOUT << " Removing [" << Start << "," << End << "] from: "; interval.print(DOUT, mri_); DOUT << "\n"; interval.removeRange(Start, End); - interval.addKillForValNum(0, Start-1); // odd # means phi node + interval.addKillForValNum(0, Start+1); // odd # means phi node DOUT << " RESULT: "; interval.print(DOUT, mri_); // Replace the interval with one of a NEW value number. Note that this |