[MC] Refactor emitELFSize to make usage more consistent. NFC.

Move the cast<MCSymbolELF> inside emitELFSize, so that: 
 - it's done in one place instead of at each call
 - it's more consistent with similar functions like EmitCOFFSafeSEH
 - ambiguity between cast<> and dyn_cast<> is avoided (which also
   eliminates an unnecessary dyn_cast call)

This also makes it easier to experiment with using ".size" directives on
non-ELF targets.

llvm-svn: 288437

3 files changed, 5 insertions, 5 deletions

diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index e83a62c9a35..e36903e1fae 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -151,7 +151,7 @@ public:
   void EmitCOFFSafeSEH(MCSymbol const *Symbol) override;
   void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
   void EmitCOFFSecRel32(MCSymbol const *Symbol) override;
-  void emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) override;
+  void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
   void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                         unsigned ByteAlignment) override;
 
@@ -620,7 +620,7 @@ void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
   EmitEOL();
 }
 
-void MCAsmStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {
+void MCAsmStreamer::emitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
   assert(MAI->hasDotTypeDotSizeDirective());
   OS << "\t.size\t";
   Symbol->print(OS, MAI);
diff --git a/llvm/lib/MC/MCELFStreamer.cpp b/llvm/lib/MC/MCELFStreamer.cpp
index 7d858c306d2..0ef1b2a8bdc 100644
--- a/llvm/lib/MC/MCELFStreamer.cpp
+++ b/llvm/lib/MC/MCELFStreamer.cpp
@@ -329,8 +329,8 @@ void MCELFStreamer::EmitCommonSymbol(MCSymbol *S, uint64_t Size,
       ->setSize(MCConstantExpr::create(Size, getContext()));
 }
 
-void MCELFStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {
-  Symbol->setSize(Value);
+void MCELFStreamer::emitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
+  cast<MCSymbolELF>(Symbol)->setSize(Value);
 }
 
 void MCELFStreamer::EmitLocalCommonSymbol(MCSymbol *S, uint64_t Size,
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index ab60731b9dc..ebbf8116fa3 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -798,7 +798,7 @@ void MCStreamer::EndCOFFSymbolDef() {}
 void MCStreamer::EmitFileDirective(StringRef Filename) {}
 void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
 void MCStreamer::EmitCOFFSymbolType(int Type) {}
-void MCStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {}
+void MCStreamer::emitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
 void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                                        unsigned ByteAlignment) {}
 void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,