After splitting, compute connected components of all new registers, not just for

the remainder register.

Example:

bb0:
  x = 1
bb1:
  use(x)
  ...
  x = 2
  jump bb1

When x is isolated in bb1, the inner part breaks into two components, x1 and x2:

bb0:
  x0 = 1
bb1:
  x1 = x0
  use(x1)
  ...
  x2 = 2
  x0 = x2
  jump bb1

llvm-svn: 117408

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/LiveRangeEdit.h b/llvm/lib/CodeGen/LiveRangeEdit.h
index d6ba256aee4..3230a2e9fcd 100644
--- a/llvm/lib/CodeGen/LiveRangeEdit.h
+++ b/llvm/lib/CodeGen/LiveRangeEdit.h
@@ -77,6 +77,8 @@ public:
   typedef SmallVectorImpl<LiveInterval*>::const_iterator iterator;
   iterator begin() const { return newRegs_.begin()+firstNew_; }
   iterator end() const { return newRegs_.end(); }
+  unsigned size() const { return newRegs_.size()-firstNew_; }
+  LiveInterval *get(unsigned idx) const { return newRegs_[idx-firstNew_]; }
 
   /// assignStackSlot - Ensure a stack slot is assigned to parent.
   /// @return the assigned stack slot number.