vendor/llvm/llvm-trunk-r338150

1 files changed, 7 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/LiveRegMatrix.h b/include/llvm/CodeGen/LiveRegMatrix.h
index fa6827f6b1f9..f62a55c73085 100644
--- a/include/llvm/CodeGen/LiveRegMatrix.h
+++ b/include/llvm/CodeGen/LiveRegMatrix.h
@@ -107,6 +107,13 @@ public:
   /// with the highest enum value is returned.
   InterferenceKind checkInterference(LiveInterval &VirtReg, unsigned PhysReg);
 
+  /// Check for interference in the segment [Start, End) that may prevent
+  /// assignment to PhysReg. If this function returns true, there is
+  /// interference in the segment [Start, End) of some other interval already
+  /// assigned to PhysReg. If this function returns false, PhysReg is free at
+  /// the segment [Start, End).
+  bool checkInterference(SlotIndex Start, SlotIndex End, unsigned PhysReg);
+
   /// Assign VirtReg to PhysReg.
   /// This will mark VirtReg's live range as occupied in the LiveRegMatrix and
   /// update VirtRegMap. The live range is expected to be available in PhysReg.