[MC] Correctly escape .safeseh's symbol

This fixes PR24107.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242050 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/MCAsmStreamer.cpp

@@ -503,7 +503,8 @@ void MCAsmStreamer::EndCOFFSymbolDef() {
 }
 
 void MCAsmStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
-  OS << "\t.safeseh\t" << *Symbol;
+  OS << "\t.safeseh\t";
+  Symbol->print(OS, MAI);
   EmitEOL();
 }
 

test/MC/COFF/safeseh.s

@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple i686-pc-win32 %s | FileCheck %s
+
+// check that we quote the output of .safeseh
+
+.safeseh "\01foo"
+// CHECK: .safeseh "\01foo"