4 files changed, 12 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index f4c9786d421..4ebe7cd4371 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -445,6 +445,7 @@ static Cursor maybeLexNumericalLiteral(Cursor C, MIToken &Token) {
 static MIToken::TokenKind getMetadataKeywordKind(StringRef Identifier) {
   return StringSwitch<MIToken::TokenKind>(Identifier)
       .Case("!tbaa", MIToken::md_tbaa)
+      .Case("!alias.scope", MIToken::md_alias_scope)
       .Default(MIToken::Error);
 }
 
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index fc92cc14e89..33748209e93 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -87,6 +87,7 @@ struct MIToken {
 
     // Named metadata keywords
     md_tbaa,
+    md_alias_scope,
 
     // Identifier tokens
     Identifier,
diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index e076a2d5b5e..271f7f08227 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -1538,12 +1538,16 @@ bool MIParser::parseMachineMemoryOperand(MachineMemOperand *&Dest) {
       if (parseMDNode(AAInfo.TBAA))
         return true;
       break;
-    // TODO: Parse AA Scope metadata.
+    case MIToken::md_alias_scope:
+      lex();
+      if (parseMDNode(AAInfo.Scope))
+        return true;
+      break;
     // TODO: Parse AA NoAlias metadata.
     // TODO: Parse the ranges metadata.
     // TODO: Report an error on duplicate metadata nodes.
     default:
-      return error("expected 'align' or '!tbaa'");
+      return error("expected 'align' or '!tbaa' or '!alias.scope'");
     }
   }
   if (expectAndConsume(MIToken::rparen))
diff --git a/llvm/lib/CodeGen/MIRPrinter.cpp b/llvm/lib/CodeGen/MIRPrinter.cpp
index b7292f3e151..6be8205f65e 100644
--- a/llvm/lib/CodeGen/MIRPrinter.cpp
+++ b/llvm/lib/CodeGen/MIRPrinter.cpp
@@ -782,7 +782,10 @@ void MIPrinter::print(const MachineMemOperand &Op) {
     OS << ", !tbaa ";
     AAInfo.TBAA->printAsOperand(OS, MST);
   }
-  // TODO: Print AA Scope metadata.
+  if (AAInfo.Scope) {
+    OS << ", !alias.scope ";
+    AAInfo.Scope->printAsOperand(OS, MST);
+  }
   // TODO: Print AA NoAlias metadata.
   // TODO: Print the ranges metadata.
   OS << ')';