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, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index 2f038ff5684..d730dce6c75 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -219,6 +219,10 @@ static Cursor maybeLexConstantPoolItem(Cursor C, MIToken &Token) {
   return maybeLexIndex(C, Token, "%const.", MIToken::ConstantPoolItem);
 }
 
+static Cursor maybeLexIRBlock(Cursor C, MIToken &Token) {
+  return maybeLexIndex(C, Token, "%ir-block.", MIToken::IRBlock);
+}
+
 static Cursor lexVirtualRegister(Cursor C, MIToken &Token) {
   auto Range = C;
   C.advance(); // Skip '%'
@@ -351,6 +355,8 @@ StringRef llvm::lexMIToken(
     return R.remaining();
   if (Cursor R = maybeLexConstantPoolItem(C, Token))
     return R.remaining();
+  if (Cursor R = maybeLexIRBlock(C, Token))
+    return R.remaining();
   if (Cursor R = maybeLexRegister(C, Token))
     return R.remaining();
   if (Cursor R = maybeLexGlobalValue(C, Token, ErrorCallback))