[CodeGen] AccelTable - remove non-constexpr (MSVC) Atom defs

Now that we've dropped VS2015 support (D64326) we can enable the constexpr variables on MSVC builds as VS2017+ correctly handles them

llvm-svn: 365477

Author: RKSimon

llvm/include/llvm/CodeGen/AccelTable.h

@@ -326,14 +326,8 @@ class AppleAccelTableOffsetData : public AppleAccelTableData {
 
   void emit(AsmPrinter *Asm) const override;
 
-#ifndef _MSC_VER
-  // The line below is rejected by older versions (TBD) of MSVC.
   static constexpr Atom Atoms[] = {
       Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4)};
-#else
-  // FIXME: Erase this path once the minimum MSCV version has been bumped.
-  static const SmallVector<Atom, 4> Atoms;
-#endif
 
 #ifndef NDEBUG
   void print(raw_ostream &OS) const override;
@@ -351,16 +345,10 @@ class AppleAccelTableTypeData : public AppleAccelTableOffsetData {
 
   void emit(AsmPrinter *Asm) const override;
 
-#ifndef _MSC_VER
-  // The line below is rejected by older versions (TBD) of MSVC.
   static constexpr Atom Atoms[] = {
       Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4),
       Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2),
       Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1)};
-#else
-  // FIXME: Erase this path once the minimum MSCV version has been bumped.
-  static const SmallVector<Atom, 4> Atoms;
-#endif
 
 #ifndef NDEBUG
   void print(raw_ostream &OS) const override;
@@ -375,14 +363,8 @@ class AppleAccelTableStaticOffsetData : public AppleAccelTableData {
 
   void emit(AsmPrinter *Asm) const override;
 
-#ifndef _MSC_VER
-  // The line below is rejected by older versions (TBD) of MSVC.
   static constexpr Atom Atoms[] = {
       Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4)};
-#else
-  // FIXME: Erase this path once the minimum MSCV version has been bumped.
-  static const SmallVector<Atom, 4> Atoms;
-#endif
 
 #ifndef NDEBUG
   void print(raw_ostream &OS) const override;
@@ -406,16 +388,10 @@ class AppleAccelTableStaticTypeData : public AppleAccelTableStaticOffsetData {
 
   void emit(AsmPrinter *Asm) const override;
 
-#ifndef _MSC_VER
-  // The line below is rejected by older versions (TBD) of MSVC.
   static constexpr Atom Atoms[] = {
       Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4),
       Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2),
       Atom(5, dwarf::DW_FORM_data1), Atom(6, dwarf::DW_FORM_data4)};
-#else
-  // FIXME: Erase this path once the minimum MSCV version has been bumped.
-  static const SmallVector<Atom, 4> Atoms;
-#endif
 
 #ifndef NDEBUG
   void print(raw_ostream &OS) const override;

llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp

@@ -614,30 +614,10 @@ void AppleAccelTableStaticTypeData::emit(AsmPrinter *Asm) const {
   Asm->emitInt32(QualifiedNameHash);
 }
 
-#ifndef _MSC_VER
-// The lines below are rejected by older versions (TBD) of MSVC.
 constexpr AppleAccelTableData::Atom AppleAccelTableTypeData::Atoms[];
 constexpr AppleAccelTableData::Atom AppleAccelTableOffsetData::Atoms[];
 constexpr AppleAccelTableData::Atom AppleAccelTableStaticOffsetData::Atoms[];
 constexpr AppleAccelTableData::Atom AppleAccelTableStaticTypeData::Atoms[];
-#else
-// FIXME: Erase this path once the minimum MSCV version has been bumped.
-const SmallVector<AppleAccelTableData::Atom, 4>
-    AppleAccelTableOffsetData::Atoms = {
-        Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4)};
-const SmallVector<AppleAccelTableData::Atom, 4> AppleAccelTableTypeData::Atoms =
-    {Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4),
-     Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2),
-     Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1)};
-const SmallVector<AppleAccelTableData::Atom, 4>
-    AppleAccelTableStaticOffsetData::Atoms = {
-        Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4)};
-const SmallVector<AppleAccelTableData::Atom, 4>
-    AppleAccelTableStaticTypeData::Atoms = {
-        Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4),
-        Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2),
-        Atom(5, dwarf::DW_FORM_data1), Atom(6, dwarf::DW_FORM_data4)};
-#endif
 
 #ifndef NDEBUG
 void AppleAccelTableWriter::Header::print(raw_ostream &OS) const {