MIR: Support MachineMemOperands without associated value

This is allowed (though used rarely) and useful to keep your tests
short.

llvm-svn: 271752

1 files changed, 9 insertions, 7 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index 8c7345111c5..41454dd9d66 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -1778,14 +1778,16 @@ bool MIParser::parseMachineMemoryOperand(MachineMemOperand *&Dest) {
     return true;
   lex();
 
-  const char *Word = Flags & MachineMemOperand::MOLoad ? "from" : "into";
-  if (Token.isNot(MIToken::Identifier) || Token.stringValue() != Word)
-    return error(Twine("expected '") + Word + "'");
-  lex();
-
   MachinePointerInfo Ptr = MachinePointerInfo();
-  if (parseMachinePointerInfo(Ptr))
-    return true;
+  if (Token.is(MIToken::Identifier)) {
+    const char *Word = Flags & MachineMemOperand::MOLoad ? "from" : "into";
+    if (Token.stringValue() != Word)
+      return error(Twine("expected '") + Word + "'");
+    lex();
+
+    if (parseMachinePointerInfo(Ptr))
+      return true;
+  }
   unsigned BaseAlignment = Size;
   AAMDNodes AAInfo;
   MDNode *Range = nullptr;