[PBQP] Conservativelly allocatable nodes can be spilled and give a better solution

Although such nodes are allocatable, the cost of spilling may be less than
allocating to register, so spilling the node may provide a better solution.
The assert does not account for this case, so remove it for now.

llvm-svn: 229103

1 files changed, 0 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/RegAllocPBQP.cpp b/llvm/lib/CodeGen/RegAllocPBQP.cpp
index 0fb4ef62eff..bdc669ce4ef 100644
--- a/llvm/lib/CodeGen/RegAllocPBQP.cpp
+++ b/llvm/lib/CodeGen/RegAllocPBQP.cpp
@@ -621,8 +621,6 @@ bool RegAllocPBQP::mapPBQPToRegAlloc(const PBQPRAGraph &G,
       assert(PReg != 0 && "Invalid preg selected.");
       VRM.assignVirt2Phys(VReg, PReg);
     } else {
-      assert(G.getNodeMetadata(NId).isSpillable() &&
-             "Spilling a node which can not be spilled.");
       // Spill VReg. If this introduces new intervals we'll need another round
       // of allocation.
       SmallVector<unsigned, 8> NewVRegs;