ptx: add store instruction

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122652 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PTX/PTXTargetMachine.cpp b/lib/Target/PTX/PTXTargetMachine.cpp
index a041d07e..f3ba499 100644
--- a/lib/Target/PTX/PTXTargetMachine.cpp
+++ b/lib/Target/PTX/PTXTargetMachine.cpp
@@ -49,6 +49,12 @@
 bool PTXTargetMachine::addInstSelector(PassManagerBase &PM,
                                        CodeGenOpt::Level OptLevel) {
   PM.add(createPTXISelDag(*this, OptLevel));
+  return false;
+}
+
+bool PTXTargetMachine::addPostRegAlloc(PassManagerBase &PM,
+                                       CodeGenOpt::Level OptLevel) {
+  // PTXMFInfoExtract must after register allocation!
   PM.add(createPTXMFInfoExtract(*this, OptLevel));
   return false;
 }