Added methods to get the live range immediately before a given slot. Intended to parallel the getVNInfoBefore method.

llvm-svn: 148453

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/include/llvm/CodeGen/LiveInterval.h b/llvm/include/llvm/CodeGen/LiveInterval.h
index dd95c5b9823..885f9bb8a5a 100644
--- a/llvm/include/llvm/CodeGen/LiveInterval.h
+++ b/llvm/include/llvm/CodeGen/LiveInterval.h
@@ -405,6 +405,14 @@ namespace llvm {
       return I == end() ? 0 : &*I;
     }
 
+    const LiveRange *getLiveRangeBefore(SlotIndex Idx) const {
+      return getLiveRangeContaining(Idx.getPrevSlot());
+    }
+
+    LiveRange *getLiveRangeBefore(SlotIndex Idx) {
+      return getLiveRangeContaining(Idx.getPrevSlot());
+    }
+
     /// getVNInfoAt - Return the VNInfo that is live at Idx, or NULL.
     VNInfo *getVNInfoAt(SlotIndex Idx) const {
       const_iterator I = FindLiveRangeContaining(Idx);