From 1e6c65dba706de80f5a4ceb8a1fc86bc3d0a61c6 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Wed, 23 Mar 2011 04:43:16 +0000
Subject: Notify the delegate before removing dead values from a live interval.

The register allocator needs to know when the range shrinks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128145 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/LiveRangeEdit.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lib/CodeGen/LiveRangeEdit.cpp')

diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index f5c67b9c74..6b419ebf32 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -182,6 +182,8 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead,
         // Remove defined value.
         if (MOI->isDef()) {
           if (VNInfo *VNI = LI.getVNInfoAt(Idx)) {
+            if (delegate_)
+              delegate_->LRE_WillShrinkVirtReg(LI.reg);
             LI.removeValNo(VNI);
             if (LI.empty()) {
               ToShrink.remove(&LI);
-- 
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