From 4030d8122da9ac6381bd6f06bf2b2550937472a9 Mon Sep 17 00:00:00 2001
From: Lang Hames <lhames@gmail.com>
Date: Sun, 17 May 2009 23:50:36 +0000
Subject: Prevented reg0 from being added to MBB live-in set, which was causing
 issues for PostRAScheduler.

llvm-svn: 71991
---
 llvm/lib/CodeGen/RegAllocPBQP.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'llvm/lib/CodeGen')

diff --git a/llvm/lib/CodeGen/RegAllocPBQP.cpp b/llvm/lib/CodeGen/RegAllocPBQP.cpp
index 9b2c92c13e5..6bad2db44d1 100644
--- a/llvm/lib/CodeGen/RegAllocPBQP.cpp
+++ b/llvm/lib/CodeGen/RegAllocPBQP.cpp
@@ -765,6 +765,11 @@ void PBQPRegAlloc::finalizeAlloc() const {
       continue;
     }
 
+    // Ignore unallocated vregs:
+    if (reg == 0) {
+      continue;
+    }
+
     // Iterate over the ranges of the current interval...
     for (LRIterator lrItr = li->begin(), lrEnd = li->end();
          lrItr != lrEnd; ++lrItr) {
-- 
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