From 3ccfce0e35371d20fb84f65185f7f0126d072461 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 29 Oct 2010 17:47:49 +0000
Subject: [PATCH] Don't transfer unused values to the new intervals formed by
 splitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117673 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SplitKit.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 84d3003859b..763cce82519 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -913,6 +913,9 @@ void SplitEditor::computeRemainder() {
   for (LiveInterval::const_vni_iterator I = parent.vni_begin(),
        E = parent.vni_end(); I != E; ++I) {
     const VNInfo *VNI = *I;
+    // Don't transfer unused values to the new intervals.
+    if (VNI->isUnused())
+      continue;
     // Original def is contained in the split intervals.
     if (intervalsLiveAt(VNI->def)) {
       // Did this value escape?