add trivial support for passing label definitions through the MCStreamer.

This is suboptimal in several aspects, see the commented out assertion.
I need to talk to Daniel about this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74057 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmParser.cpp b/tools/llvm-mc/AsmParser.cpp
index 4dd136d..ca0b933 100644
--- a/tools/llvm-mc/AsmParser.cpp
+++ b/tools/llvm-mc/AsmParser.cpp
@@ -185,6 +185,12 @@
   if (Lexer.Lex() == asmtok::Colon) {
     // identifier ':'   -> Label.
     Lexer.Lex();
+    
+    // Since we saw a label, create a symbol and emit it.
+    // FIXME: If the label starts with L it is an assembler temporary label.
+    // Why does the client of this api need to know this?
+    Out.EmitLabel(Ctx.GetOrCreateSymbol(IDVal));
+    
     return ParseStatement();
   }