From 4453324e5b564b71e37cf1b786f573b5db6e3052 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 26 Oct 2010 22:36:02 +0000
Subject: Preserve PHIDef bits in cloned values during splitting.

llvm-svn: 117405
---
 llvm/lib/CodeGen/SplitKit.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/CodeGen')

diff --git a/llvm/lib/CodeGen/SplitKit.cpp b/llvm/lib/CodeGen/SplitKit.cpp
index 798f71465d3..0d43341aa0f 100644
--- a/llvm/lib/CodeGen/SplitKit.cpp
+++ b/llvm/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));
-- 
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