GlobalISel: implement alloca instruction

llvm-svn: 276433
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index a5a95f8..ea155c3 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -102,6 +102,7 @@
     NamedRegister,
     MachineBasicBlockLabel,
     MachineBasicBlock,
+    PointerType,
     ScalarType,
     StackObject,
     FixedStackObject,