From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 26 Oct 2010 22:36:02 +0000 (+0000)
Subject: Preserve PHIDef bits in cloned values during splitting.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=79c0262fa8516d0b673b2fcacff920dcc62a9b94;p=oota-llvm.git

Preserve PHIDef bits in cloned values during splitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117405 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 798f71465d3..0d43341aa0f 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -321,6 +321,10 @@ VNInfo *LiveIntervalMap::defValue(const VNInfo *ParentVNI, SlotIndex Idx) {
   // Create a new value.
   VNInfo *VNI = li_->getNextValue(Idx, 0, lis_.getVNInfoAllocator());
 
+  // Preserve the PHIDef bit.
+  if (ParentVNI->isPHIDef() && Idx == ParentVNI->def)
+    VNI->setIsPHIDef(true);
+
   // Use insert for lookup, so we can add missing values with a second lookup.
   std::pair<ValueMap::iterator,bool> InsP =
     valueMap_.insert(makeVV(ParentVNI, Idx == ParentVNI->def ? VNI : 0));