From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Thu, 9 Dec 2010 21:20:46 +0000 (+0000)
Subject: Remember to filter out reserved rergisters from the allocation order.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ff092faffb85410b0013fb70bc991bb98b5663a5;p=oota-llvm.git

Remember to filter out reserved rergisters from the allocation order.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121411 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp
index eae4cccb549..3c166bac4b4 100644
--- a/lib/CodeGen/RegAllocGreedy.cpp
+++ b/lib/CodeGen/RegAllocGreedy.cpp
@@ -165,7 +165,7 @@ bool RAGreedy::reassignVReg(LiveInterval &InterferingVReg,
          E = TRC->allocation_order_end(*MF);
        I != E; ++I) {
     unsigned PhysReg = *I;
-    if (PhysReg == OldPhysReg)
+    if (PhysReg == OldPhysReg || ReservedRegs.test(PhysReg))
       continue;
 
     // Instantiate a "subquery", not to be confused with the Queries array.