MIR Serialization: Serialize the unnamed basic block references.

This commit serializes the references from the machine basic blocks to the
unnamed basic blocks.

This commit adds a new attribute to the machine basic block's YAML mapping
called 'ir-block'. This attribute contains the actual reference to the
basic block.

Reviewers: Duncan P. N. Exon Smith
llvm-svn: 243340

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index b84fb743599..06fa1f256dd 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -66,7 +66,8 @@ struct MIToken {
     IntegerLiteral,
     VirtualRegister,
     ConstantPoolItem,
-    JumpTableIndex
+    JumpTableIndex,
+    IRBlock,
   };
 
 private:
@@ -132,7 +133,8 @@ public:
     return Kind == IntegerLiteral || Kind == MachineBasicBlock ||
            Kind == StackObject || Kind == FixedStackObject ||
            Kind == GlobalValue || Kind == VirtualRegister ||
-           Kind == ConstantPoolItem || Kind == JumpTableIndex;
+           Kind == ConstantPoolItem || Kind == JumpTableIndex ||
+           Kind == IRBlock;
   }
 };