commit 1973b3e2541f95c87e4acb7e134362ff306ec9ed
author Jakob Stoklund Olesen <stoklund@2pi.dk> Mon Mar 07 22:42:16 2011 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Mon Mar 07 22:42:16 2011 +0000
tree 9b4ab014985a01f9cf6df6542caa96697f765819
parent be2119e8e2bc7006cfd638a24367acbfda625d16

Make the UselessRegs argument optional in the LiveRangeEdit constructor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127181 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/LiveRangeEdit.cpp

diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 3bbda1c..7de1284 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -75,9 +75,10 @@
     if (MO.isDef())
       return false;
     // We cannot depend on virtual registers in uselessRegs_.
-    for (unsigned ui = 0, ue = uselessRegs_.size(); ui != ue; ++ui)
-      if (uselessRegs_[ui]->reg == MO.getReg())
-        return false;
+    if (uselessRegs_)
+      for (unsigned ui = 0, ue = uselessRegs_->size(); ui != ue; ++ui)
+        if ((*uselessRegs_)[ui]->reg == MO.getReg())
+          return false;
 
     LiveInterval &li = lis.getInterval(MO.getReg());
     const VNInfo *OVNI = li.getVNInfoAt(OrigIdx);