[MIR] Add support for the frame-destroy MachineInstr flag

We are printing / parsing the `frame-setup` MachineInstr flag but not
the `frame-destroy` one.

Differential Revision: https://reviews.llvm.org/D41509

llvm-svn: 322071
diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index 1a78ae3a..4fa84c7 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -925,6 +925,9 @@
   if (Token.is(MIToken::kw_frame_setup)) {
     Flags |= MachineInstr::FrameSetup;
     lex();
+  } else if (Token.is(MIToken::kw_frame_destroy)) {
+    Flags |= MachineInstr::FrameDestroy;
+    lex();
   }
   if (Token.isNot(MIToken::Identifier))
     return error("expected a machine instruction");