From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 4 Feb 2011 00:59:23 +0000 (+0000)
Subject: Skip unused values.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9ecd1e71973f555cab00ee862b6f509d0126025a;p=oota-llvm.git

Skip unused values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124842 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 3ffb079acd3..e4a82adfb32 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -948,6 +948,8 @@ void SplitEditor::finish() {
   for (LiveInterval::const_vni_iterator I = Edit.getParent().vni_begin(),
          E = Edit.getParent().vni_end(); I != E; ++I) {
     const VNInfo *ParentVNI = *I;
+    if (ParentVNI->isUnused())
+      continue;
     LiveIntervalMap &LIM = LIMappers[RegAssign.lookup(ParentVNI->def)];
     VNInfo *VNI = LIM.defValue(ParentVNI, ParentVNI->def);
     LIM.getLI()->addRange(LiveRange(ParentVNI->def,
@@ -976,7 +978,7 @@ void SplitEditor::finish() {
   for (LiveInterval::const_vni_iterator I = Edit.getParent().vni_begin(),
        E = Edit.getParent().vni_end(); I != E; ++I) {
     const VNInfo *PHIVNI = *I;
-    if (!PHIVNI->isPHIDef())
+    if (PHIVNI->isUnused() || !PHIVNI->isPHIDef())
       continue;
     unsigned RegIdx = RegAssign.lookup(PHIVNI->def);
     LiveIntervalMap &LIM = LIMappers[RegIdx];