NFC: Rename MCSafeSEHFragment to MCSymbolIdFragment

Summary:
This fragment emits a symbol ID and will be useful for more than just Safe SEH
tables (e.g., I plan to re-use it for Control Flow Guard tables).  This is
simply a rename refactor.

Reviewers: rnk

Subscribers: llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D39770

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317703 91177308-0d34-0410-b5e6-96231b3b80d8

Author: amccarth-google

include/llvm/MC/MCFragment.h

@@ -42,7 +42,7 @@ class MCFragment : public ilist_node_with_parent<MCFragment, MCSection> {
     FT_DwarfFrame,
     FT_LEB,
     FT_Padding,
-    FT_SafeSEH,
+    FT_SymbolId,
     FT_CVInlineLines,
     FT_CVDefRange,
     FT_Dummy
@@ -562,12 +562,13 @@ class MCDwarfCallFrameFragment : public MCFragment {
   }
 };
 
-class MCSafeSEHFragment : public MCFragment {
+/// Represents a symbol table index fragment.
+class MCSymbolIdFragment : public MCFragment {
   const MCSymbol *Sym;
 
 public:
-  MCSafeSEHFragment(const MCSymbol *Sym, MCSection *Sec = nullptr)
-      : MCFragment(FT_SafeSEH, false, 0, Sec), Sym(Sym) {}
+  MCSymbolIdFragment(const MCSymbol *Sym, MCSection *Sec = nullptr)
+      : MCFragment(FT_SymbolId, false, 0, Sec), Sym(Sym) {}
 
   /// \name Accessors
   /// @{
@@ -578,7 +579,7 @@ class MCSafeSEHFragment : public MCFragment {
   /// @}
 
   static bool classof(const MCFragment *F) {
-    return F->getKind() == MCFragment::FT_SafeSEH;
+    return F->getKind() == MCFragment::FT_SymbolId;
   }
 };
 

lib/MC/MCAssembler.cpp

@@ -290,7 +290,7 @@ uint64_t MCAssembler::computeFragmentSize(const MCAsmLayout &Layout,
   case MCFragment::FT_Padding:
     return cast<MCPaddingFragment>(F).getSize();
 
-  case MCFragment::FT_SafeSEH:
+  case MCFragment::FT_SymbolId:
     return 4;
 
   case MCFragment::FT_Align: {
@@ -563,8 +563,8 @@ static void writeFragment(const MCAssembler &Asm, const MCAsmLayout &Layout,
     break;
   }
 
-  case MCFragment::FT_SafeSEH: {
-    const MCSafeSEHFragment &SF = cast<MCSafeSEHFragment>(F);
+  case MCFragment::FT_SymbolId: {
+    const MCSymbolIdFragment &SF = cast<MCSymbolIdFragment>(F);
     OW->write32(SF.getSymbol()->getIndex());
     break;
   }

lib/MC/MCFragment.cpp

@@ -281,8 +281,8 @@ void MCFragment::destroy() {
     case FT_Padding:
       delete cast<MCPaddingFragment>(this);
       return;
-    case FT_SafeSEH:
-      delete cast<MCSafeSEHFragment>(this);
+    case FT_SymbolId:
+      delete cast<MCSymbolIdFragment>(this);
       return;
     case FT_CVInlineLines:
       delete cast<MCCVInlineLineTableFragment>(this);
@@ -326,7 +326,7 @@ LLVM_DUMP_METHOD void MCFragment::dump() const {
   case MCFragment::FT_DwarfFrame: OS << "MCDwarfCallFrameFragment"; break;
   case MCFragment::FT_LEB:   OS << "MCLEBFragment"; break;
   case MCFragment::FT_Padding: OS << "MCPaddingFragment"; break;
-  case MCFragment::FT_SafeSEH:    OS << "MCSafeSEHFragment"; break;
+  case MCFragment::FT_SymbolId:    OS << "MCSymbolIdFragment"; break;
   case MCFragment::FT_CVInlineLines: OS << "MCCVInlineLineTableFragment"; break;
   case MCFragment::FT_CVDefRange: OS << "MCCVDefRangeTableFragment"; break;
   case MCFragment::FT_Dummy: OS << "MCDummyFragment"; break;
@@ -436,8 +436,8 @@ LLVM_DUMP_METHOD void MCFragment::dump() const {
     OS << "\n       ";
     break;
   }
-  case MCFragment::FT_SafeSEH: {
-    const MCSafeSEHFragment *F = cast<MCSafeSEHFragment>(this);
+  case MCFragment::FT_SymbolId: {
+    const MCSymbolIdFragment *F = cast<MCSymbolIdFragment>(this);
     OS << "\n       ";
     OS << " Sym:" << F->getSymbol();
     break;

lib/MC/MCWinCOFFStreamer.cpp

@@ -182,7 +182,7 @@ void MCWinCOFFStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
   if (SXData->getAlignment() < 4)
     SXData->setAlignment(4);
 
-  new MCSafeSEHFragment(Symbol, SXData);
+  new MCSymbolIdFragment(Symbol, SXData);
 
   getAssembler().registerSymbol(*Symbol);
   CSymbol->setIsSafeSEH();