Give the MCStreamer class hierarchy LLVM RTTI facilities for use with

isa<> and dyn_cast<>. In several places, code is already hacking around
the absence of this, and there seem to be several interfaces that might
be lifted and/or devirtualized using this.

This change was based on a discussion with Jim Grosbach about how best
to handle testing for specific MCStreamer subclasses. He said that this
was the correct end state, and everything else was too hacky so
I decided to just make it so.

No functionality should be changed here, this is just threading the kind
through all the constructors and setting up the classof overloads.

llvm-svn: 174113

1 files changed, 3 insertions, 4 deletions

diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 00ebde3c40b..e92569b0cc4 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -21,10 +21,9 @@
 #include <cstdlib>
 using namespace llvm;
 
-MCStreamer::MCStreamer(MCContext &Ctx)
-  : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
-    CurrentW64UnwindInfo(0), LastSymbol(0),
-    AutoInitSections(false) {
+MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx)
+    : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
+      CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) {
   const MCSection *section = NULL;
   SectionStack.push_back(std::make_pair(section, section));
 }