Recommit r129383. PreRA scheduler heuristic fixes: VRegCycle, TokenFactor latency.

[oota-llvm.git] / lib / CodeGen / LiveIntervalUnion.h

diff --git a/lib/CodeGen/LiveIntervalUnion.h b/lib/CodeGen/LiveIntervalUnion.h
index 0964ecd07a8f9440794adce7ac677a2a35d3f95c..c83578e99c6ca5f611e9bcc4c68a192ae4f2b265 100644 (file)
--- a/lib/CodeGen/LiveIntervalUnion.h
+++ b/lib/CodeGen/LiveIntervalUnion.h
@@ -95,6 +95,9 @@ public:
   // Remove a live virtual register's segments from this union.
   void extract(LiveInterval &VirtReg);
 
+  // Remove all inserted virtual registers.
+  void clear() { Segments.clear(); ++Tag; }
+
   // Print union, using TRI to translate register names
   void print(raw_ostream &OS, const TargetRegisterInfo *TRI) const;
 
@@ -226,7 +229,8 @@ public:
 
     // Count the virtual registers in this union that interfere with this
     // query's live virtual register, up to maxInterferingRegs.
-    unsigned collectInterferingVRegs(unsigned MaxInterferingRegs = UINT_MAX);
+    unsigned collectInterferingVRegs(unsigned MaxInterferingRegs = UINT_MAX,
+                                     float MaxWeight = HUGE_VALF);
 
     // Was this virtual register visited during collectInterferingVRegs?
     bool isSeenInterference(LiveInterval *VReg) const;