docs: Bring TableGen syntax a bit closer to reality.

It's not just def's but actually a limited subset of Object's that are
allowed inside a multiclass.

Spotted by Joel Jones.

llvm-svn: 171935

2 files changed, 8 insertions, 2 deletions

diff --git a/llvm/docs/TableGen/LangRef.rst b/llvm/docs/TableGen/LangRef.rst
index 34098a0eb6b..8fdf467ea72 100644
--- a/llvm/docs/TableGen/LangRef.rst
+++ b/llvm/docs/TableGen/LangRef.rst
@@ -370,6 +370,7 @@ applied at the end of parsing the base classes of a record.
 
 .. productionlist::
    MultiClass: "multiclass" `TokIdentifier` [`TemplateArgList`]
-             : [":" `BaseMultiClassList`] "{" `MultiClassDef`+ "}"
+             : [":" `BaseMultiClassList`] "{" `MultiClassObject`+ "}"
    BaseMultiClassList: `MultiClassID` ("," `MultiClassID`)*
    MultiClassID: `TokIdentifier`
+   MultiClassObject: `Def` | `Defm` | `Let` | `Foreach`
diff --git a/llvm/lib/TableGen/TGParser.cpp b/llvm/lib/TableGen/TGParser.cpp
index 17f0abc9747..89299d72ea5 100644
--- a/llvm/lib/TableGen/TGParser.cpp
+++ b/llvm/lib/TableGen/TGParser.cpp
@@ -2160,7 +2160,12 @@ bool TGParser::ParseTopLevelLet(MultiClass *CurMultiClass) {
 /// ParseMultiClass - Parse a multiclass definition.
 ///
 ///  MultiClassInst ::= MULTICLASS ID TemplateArgList?
-///                     ':' BaseMultiClassList '{' MultiClassDef+ '}'
+///                     ':' BaseMultiClassList '{' MultiClassObject+ '}'
+///  MultiClassObject ::= DefInst
+///  MultiClassObject ::= MultiClassInst
+///  MultiClassObject ::= DefMInst
+///  MultiClassObject ::= LETCommand '{' ObjectList '}'
+///  MultiClassObject ::= LETCommand Object
 ///
 bool TGParser::ParseMultiClass() {
   assert(Lex.getCode() == tgtok::MultiClass && "Unexpected token");