Provide LiveIntervalUnion::Query::checkLoopInterference.
This is a three-way interval list intersection between a virtual register, a
live interval union, and a loop. It will be used to identify interference-free
loops for live range splitting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122034 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalUnion.h b/lib/CodeGen/LiveIntervalUnion.h
index d8dcbda..ff23cf6 100644
--- a/lib/CodeGen/LiveIntervalUnion.h
+++ b/lib/CodeGen/LiveIntervalUnion.h
@@ -24,6 +24,7 @@
namespace llvm {
+class MachineLoopRange;
class TargetRegisterInfo;
#ifndef NDEBUG
@@ -76,6 +77,10 @@
bool empty() const { return Segments.empty(); }
SlotIndex startIndex() const { return Segments.start(); }
+ // Provide public access to the underlying map to allow overlap iteration.
+ typedef LiveSegments Map;
+ const Map &getMap() { return Segments; }
+
// Add a live virtual register to this union and merge its segments.
void unify(LiveInterval &VirtReg);
@@ -223,6 +228,10 @@
return InterferingVRegs;
}
+ /// checkLoopInterference - Return true if there is interference overlapping
+ /// Loop.
+ bool checkLoopInterference(MachineLoopRange*);
+
void print(raw_ostream &OS, const TargetRegisterInfo *TRI);
private:
Query(const Query&); // DO NOT IMPLEMENT