From 6194569d22003fddaf1a33acdbb84d5efe76e7d7 Mon Sep 17 00:00:00 2001 From: Lang Hames Date: Wed, 9 Dec 2009 05:39:12 +0000 Subject: Added a new "splitting" spiller. When a call is placed to spill an interval this spiller will first try to break the interval up into its component values. Single value intervals and intervals which have already been split (or are the result of previous splits) are spilled by the default spiller. Splitting intervals as described above may improve the performance of generated code in some circumstances. This work is experimental however, and it still miscompiles many benchmarks. It's not recommended for general use yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90951 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveIntervalAnalysis.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp') diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 35337ef..c16ddc5 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -401,7 +401,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, interval.removeRange(Start, End); assert(interval.ranges.size() == 1 && "Newly discovered PHI interval has >1 ranges."); - MachineBasicBlock *killMBB = getMBBFromIndex(interval.endIndex()); + MachineBasicBlock *killMBB = getMBBFromIndex(VNI->def); VNI->addKill(indexes_->getTerminatorGap(killMBB)); VNI->setHasPHIKill(true); DEBUG({ @@ -412,7 +412,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, // Replace the interval with one of a NEW value number. Note that this // value number isn't actually defined by an instruction, weird huh? :) LiveRange LR(Start, End, - interval.getNextValue(SlotIndex(getMBBStartIdx(mbb), true), + interval.getNextValue(SlotIndex(getMBBStartIdx(Killer->getParent()), true), 0, false, VNInfoAllocator)); LR.valno->setIsPHIDef(true); DEBUG(errs() << " replace range with " << LR); -- cgit v1.1