MC: Reject attempts to define a variable symbol.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103111 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index dc09f21..1d231bb 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -218,6 +218,7 @@
 
 void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
   assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
+  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
   assert(CurSection && "Cannot emit before setting section!");
 
   OS << *Symbol << ":";
@@ -234,10 +235,6 @@
 }
 
 void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
-  // Only absolute symbols can be redefined.
-  assert((Symbol->isUndefined() || Symbol->isAbsolute()) &&
-         "Cannot define a symbol twice!");
-
   OS << *Symbol << " = " << *Value;
   EmitEOL();