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
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index 526f571..418971d 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -54,12 +54,11 @@
/// by MachO. Beware!
class ARMELFStreamer : public MCELFStreamer {
public:
- ARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
- raw_ostream &OS, MCCodeEmitter *Emitter, bool IsThumb)
- : MCELFStreamer(Context, TAB, OS, Emitter),
- IsThumb(IsThumb), MappingSymbolCounter(0), LastEMS(EMS_None),
- ExTab(0), FnStart(0), Personality(0), CantUnwind(false) {
- }
+ ARMELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
+ MCCodeEmitter *Emitter, bool IsThumb)
+ : MCELFStreamer(SK_ARMELFStreamer, Context, TAB, OS, Emitter),
+ IsThumb(IsThumb), MappingSymbolCounter(0), LastEMS(EMS_None), ExTab(0),
+ FnStart(0), Personality(0), CantUnwind(false) {}
~ARMELFStreamer() {}
@@ -134,6 +133,10 @@
}
}
+ static bool classof(const MCStreamer *S) {
+ return S->getKind() == SK_ARMELFStreamer;
+ }
+
private:
enum ElfMappingSymbol {
EMS_None,