X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FRegAllocPBQP.h;fp=include%2Fllvm%2FCodeGen%2FRegAllocPBQP.h;h=3badfe0b240594b95352bed9fc811b24044fdd66;hb=acd25d24815d8ed774da67f5faa8dc66d9c2d3d7;hp=540af08408816ba9d2a6903cb79ce25698253eb8;hpb=d4510005dfd1aa65953f73d4807d65fbd697b445;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/RegAllocPBQP.h b/include/llvm/CodeGen/RegAllocPBQP.h
index 540af084088..3badfe0b240 100644
--- a/include/llvm/CodeGen/RegAllocPBQP.h
+++ b/include/llvm/CodeGen/RegAllocPBQP.h
@@ -192,8 +192,10 @@ public:
     : RS(Other.RS), NumOpts(Other.NumOpts), DeniedOpts(Other.DeniedOpts),
       OptUnsafeEdges(new unsigned[NumOpts]), VReg(Other.VReg),
       AllowedRegs(Other.AllowedRegs) {
-    std::copy(&Other.OptUnsafeEdges[0], &Other.OptUnsafeEdges[NumOpts],
-              &OptUnsafeEdges[0]);
+    if (NumOpts > 0) {
+      std::copy(&Other.OptUnsafeEdges[0], &Other.OptUnsafeEdges[NumOpts],
+                &OptUnsafeEdges[0]);
+    }
   }
 
   // FIXME: Re-implementing default behavior to work around MSVC. Remove once