diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2011-02-20 12:57:14 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2011-02-20 12:57:14 +0000 |
| commit | cf099d11218cb6f6c5cce947d6738e347f07fb12 (patch) | |
| tree | d2b61ce94e654cb01a254d2195259db5f9cc3f3c /lib/CodeGen/LiveStackAnalysis.cpp | |
| parent | 49011b52fcba02a6051957b84705159f52fae4e4 (diff) | |
Notes
Diffstat (limited to 'lib/CodeGen/LiveStackAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveStackAnalysis.cpp | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveStackAnalysis.cpp b/lib/CodeGen/LiveStackAnalysis.cpp index b5c385f77239..c75196a47210 100644 --- a/lib/CodeGen/LiveStackAnalysis.cpp +++ b/lib/CodeGen/LiveStackAnalysis.cpp @@ -26,7 +26,9 @@ using namespace llvm; char LiveStacks::ID = 0; INITIALIZE_PASS(LiveStacks, "livestacks", - "Live Stack Slot Analysis", false, false); + "Live Stack Slot Analysis", false, false) + +char &llvm::LiveStacksID = LiveStacks::ID; void LiveStacks::getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); @@ -48,6 +50,22 @@ bool LiveStacks::runOnMachineFunction(MachineFunction &) { return false; } +LiveInterval & +LiveStacks::getOrCreateInterval(int Slot, const TargetRegisterClass *RC) { + assert(Slot >= 0 && "Spill slot indice must be >= 0"); + SS2IntervalMap::iterator I = S2IMap.find(Slot); + if (I == S2IMap.end()) { + I = S2IMap.insert(I, std::make_pair(Slot, + LiveInterval(TargetRegisterInfo::index2StackSlot(Slot), 0.0F))); + S2RCMap.insert(std::make_pair(Slot, RC)); + } else { + // Use the largest common subclass register class. + const TargetRegisterClass *OldRC = S2RCMap[Slot]; + S2RCMap[Slot] = getCommonSubClass(OldRC, RC); + } + return I->second; +} + /// print - Implement the dump method. void LiveStacks::print(raw_ostream &OS, const Module*) const { |