From b64f669b666098b8494660fbd08a18610be228d4 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Thu, 3 Mar 2011 04:23:52 +0000
Subject: [PATCH] Avoid comparing invalid slot indexes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126922 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/LiveInterval.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index a37296f77b0..f2345bc2c58 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -33,16 +33,18 @@ using namespace llvm;
 // CompEnd - Compare LiveRange ends.
 namespace {
 struct CompEnd {
-  bool operator()(const LiveRange &A, const LiveRange &B) const {
-    return A.end < B.end;
+  bool operator()(SlotIndex A, const LiveRange &B) const {
+    return A < B.end;
+  }
+  bool operator()(const LiveRange &A, SlotIndex B) const {
+    return A.end < B;
   }
 };
 }
 
 LiveInterval::iterator LiveInterval::find(SlotIndex Pos) {
   assert(Pos.isValid() && "Cannot search for an invalid index");
-  return std::upper_bound(begin(), end(), LiveRange(SlotIndex(), Pos, 0),
-                          CompEnd());
+  return std::upper_bound(begin(), end(), Pos, CompEnd());
 }
 
 /// killedInRange - Return true if the interval has kills in [Start,End).