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Reject RS_Spill ranges from local splitting as well. 

All new local ranges are marked as RS_New now, so there is no need to
attempt splitting of RS_Spill ranges any more.

llvm-svn: 137002
This commit is contained in:
Jakob Stoklund Olesen 2011-08-05 23:50:33 +00:00
parent 02cf10bdfd
commit d4bb1d43e8
1 changed files with 4 additions and 4 deletions
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8
llvm/lib/CodeGen/RegAllocGreedy.cpp
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@ -1501,6 +1501,10 @@ unsigned RAGreedy::tryLocalSplit(LiveInterval &VirtReg, AllocationOrder &Order,
/// @return Physreg when VirtReg may be assigned and/or new NewVRegs. /// @return Physreg when VirtReg may be assigned and/or new NewVRegs.
unsigned RAGreedy::trySplit(LiveInterval &VirtReg, AllocationOrder &Order, unsigned RAGreedy::trySplit(LiveInterval &VirtReg, AllocationOrder &Order,
SmallVectorImpl<LiveInterval*>&NewVRegs) { SmallVectorImpl<LiveInterval*>&NewVRegs) {
// Ranges must be Split2 or less.
if (getStage(VirtReg) >= RS_Spill)
return 0;
// Local intervals are handled separately. // Local intervals are handled separately.
if (LIS->intervalIsInOneMBB(VirtReg)) { if (LIS->intervalIsInOneMBB(VirtReg)) {
NamedRegionTimer T("Local Splitting", TimerGroupName, TimePassesIsEnabled); NamedRegionTimer T("Local Splitting", TimerGroupName, TimePassesIsEnabled);
@ -1510,10 +1514,6 @@ unsigned RAGreedy::trySplit(LiveInterval &VirtReg, AllocationOrder &Order,
NamedRegionTimer T("Global Splitting", TimerGroupName, TimePassesIsEnabled); NamedRegionTimer T("Global Splitting", TimerGroupName, TimePassesIsEnabled);
// Ranges must be Split2 or less.
if (getStage(VirtReg) >= RS_Spill)
return 0;
SA->analyze(&VirtReg); SA->analyze(&VirtReg);
// FIXME: SplitAnalysis may repair broken live ranges coming from the // FIXME: SplitAnalysis may repair broken live ranges coming from the