MIR Serialization: Serialize the external symbol machine operands.

Reviewers: Duncan P. N. Exon Smith
llvm-svn: 242806

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index ee4d59ddcaa..2a1caab5794 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -271,6 +271,36 @@ static Cursor maybeLexGlobalValue(
   return C;
 }
 
+static Cursor lexName(
+    Cursor C, MIToken &Token, MIToken::TokenKind Type,
+    MIToken::TokenKind QuotedType, unsigned PrefixLength,
+    function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+  auto Range = C;
+  C.advance(PrefixLength);
+  if (C.peek() == '"') {
+    if (Cursor R = lexStringConstant(C, ErrorCallback)) {
+      Token = MIToken(QuotedType, Range.upto(R), PrefixLength);
+      return R;
+    }
+    Token = MIToken(MIToken::Error, Range.remaining());
+    return Range;
+  }
+  while (isIdentifierChar(C.peek()))
+    C.advance();
+  Token = MIToken(Type, Range.upto(C), PrefixLength);
+  return C;
+}
+
+static Cursor maybeLexExternalSymbol(
+    Cursor C, MIToken &Token,
+    function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+  if (C.peek() != '$')
+    return None;
+  return lexName(C, Token, MIToken::ExternalSymbol,
+                 MIToken::QuotedExternalSymbol,
+                 /*PrefixLength=*/1, ErrorCallback);
+}
+
 static Cursor maybeLexIntegerLiteral(Cursor C, MIToken &Token) {
   if (!isdigit(C.peek()) && (C.peek() != '-' || !isdigit(C.peek(1))))
     return None;
@@ -331,6 +361,8 @@ StringRef llvm::lexMIToken(
     return R.remaining();
   if (Cursor R = maybeLexGlobalValue(C, Token, ErrorCallback))
     return R.remaining();
+  if (Cursor R = maybeLexExternalSymbol(C, Token, ErrorCallback))
+    return R.remaining();
   if (Cursor R = maybeLexIntegerLiteral(C, Token))
     return R.remaining();
   if (Cursor R = maybeLexSymbol(C, Token))