X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FLiveIntervalAnalysis.h;h=87421e2f83b4af2fa4cf349aad940ec1ae1b2f7b;hp=9d688412897c80ce63a3136a4d104bc0ed69c9b8;hb=20a42bb20d43b80e322c95dd99b64a5a4566fe08;hpb=cf0db29df20d9c665da7e82bb261bdd7cf7f1b2b

diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h
index 9d688412897..87421e2f83b 100644
--- a/include/llvm/CodeGen/LiveIntervalAnalysis.h
+++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h
@@ -22,6 +22,7 @@
 
 #include "llvm/ADT/IndexedMap.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/CodeGen/LiveInterval.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
@@ -36,7 +37,6 @@ namespace llvm {
 
 extern cl::opt<bool> UseSegmentSetForPhysRegs;
 
-  class AliasAnalysis;
   class BitVector;
   class BlockFrequency;
   class LiveRangeCalc;
@@ -147,13 +147,12 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     LiveInterval::Segment addSegmentToEndOfBlock(unsigned reg,
                                                  MachineInstr* startInst);
 
-    /// shrinkToUses - After removing some uses of a register, shrink its live
-    /// range to just the remaining uses. This method does not compute reaching
-    /// defs for new uses, and it doesn't remove dead defs.
-    /// Dead PHIDef values are marked as unused.
-    /// New dead machine instructions are added to the dead vector.
-    /// Return true if the interval may have been separated into multiple
-    /// connected components.
+    /// After removing some uses of a register, shrink its live range to just
+    /// the remaining uses. This method does not compute reaching defs for new
+    /// uses, and it doesn't remove dead defs.
+    /// Dead PHIDef values are marked as unused. New dead machine instructions
+    /// are added to the dead vector. Returns true if the interval may have been
+    /// separated into multiple connected components.
     bool shrinkToUses(LiveInterval *li,
                       SmallVectorImpl<MachineInstr*> *dead = nullptr);
 
@@ -161,6 +160,8 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     /// shrinkToUses(LiveInterval *li, SmallVectorImpl<MachineInstr*> *dead)
     /// that works on a subregister live range and only looks at uses matching
     /// the lane mask of the subregister range.
+    /// This may leave the subrange empty which needs to be cleaned up with
+    /// LiveInterval::removeEmptySubranges() afterwards.
     void shrinkToUses(LiveInterval::SubRange &SR, unsigned Reg);
 
     /// extendToIndices - Extend the live range of LI to reach all points in
@@ -257,11 +258,6 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
       Indexes->replaceMachineInstrInMaps(MI, NewMI);
     }
 
-    bool findLiveInMBBs(SlotIndex Start, SlotIndex End,
-                        SmallVectorImpl<MachineBasicBlock*> &MBBs) const {
-      return Indexes->findLiveInMBBs(Start, End, MBBs);
-    }
-
     VNInfo::Allocator& getVNInfoAllocator() { return VNInfoAllocator; }
 
     void getAnalysisUsage(AnalysisUsage &AU) const override;
@@ -406,6 +402,10 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     /// that start at position @p Pos.
     void removeVRegDefAt(LiveInterval &LI, SlotIndex Pos);
 
+    /// Split separate components in LiveInterval \p LI into separate intervals.
+    void splitSeparateComponents(LiveInterval &LI,
+                                 SmallVectorImpl<LiveInterval*> &SplitLIs);
+
   private:
     /// Compute live intervals for all virtual registers.
     void computeVirtRegs();
@@ -440,10 +440,10 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     void repairOldRegInRange(MachineBasicBlock::iterator Begin,
                              MachineBasicBlock::iterator End,
                              const SlotIndex endIdx, LiveRange &LR,
-                             unsigned Reg, unsigned LaneMask = ~0u);
+                             unsigned Reg, LaneBitmask LaneMask = ~0u);
 
     class HMEditor;
   };
-} // namespace llvm
+} // End llvm namespace
 
 #endif