From: Owen Anderson <resistor@mac.com>
Date: Fri, 25 Jul 2008 21:08:41 +0000 (+0000)
Subject: Remove live interval entries for an interval if we're eliminating its only VN.
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=55c64358d1c04990cd5f50785d3e3b27447dac21

Remove live interval entries for an interval if we're eliminating its only VN.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54062 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp
index a2bb8185111..9a9fba550b8 100644
--- a/lib/CodeGen/StrongPHIElimination.cpp
+++ b/lib/CodeGen/StrongPHIElimination.cpp
@@ -794,7 +794,12 @@ void StrongPHIElimination::mergeLiveIntervals(unsigned primary,
                                    LI.getVNInfoAllocator());
   NewVN->hasPHIKill = true;
   LiveRange NewRange(RangeMergingIn->start, RangeMergingIn->end, NewVN);
-  RHS.removeRange(RangeMergingIn->start, RangeMergingIn->end, true);
+  
+  if (RHS.containsOneValue())
+    LI.removeInterval(RHS.reg);
+  else
+    RHS.removeRange(RangeMergingIn->start, RangeMergingIn->end, true);
+  
   LHS.addRange(NewRange);
 }