Support: Simplify endian stream interface. NFCI.

Provide some free functions to reduce verbosity of endian-writing
a single value, and replace the endianness template parameter with
a field.

Part of PR37466.

Differential Revision: https://reviews.llvm.org/D47032

llvm-svn: 332757

1 files changed, 4 insertions, 8 deletions

diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index 0e0ea965d14..57823e419f7 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -1798,6 +1798,8 @@ void MCDwarfFrameEmitter::EncodeAdvanceLoc(MCContext &Context,
   // Scale the address delta by the minimum instruction length.
   AddrDelta = ScaleAddrDelta(Context, AddrDelta);
 
+  support::endianness E =
+      Context.getAsmInfo()->isLittleEndian() ? support::little : support::big;
   if (AddrDelta == 0) {
   } else if (isUIntN(6, AddrDelta)) {
     uint8_t Opcode = dwarf::DW_CFA_advance_loc | AddrDelta;
@@ -1807,16 +1809,10 @@ void MCDwarfFrameEmitter::EncodeAdvanceLoc(MCContext &Context,
     OS << uint8_t(AddrDelta);
   } else if (isUInt<16>(AddrDelta)) {
     OS << uint8_t(dwarf::DW_CFA_advance_loc2);
-    if (Context.getAsmInfo()->isLittleEndian())
-      support::endian::Writer<support::little>(OS).write<uint16_t>(AddrDelta);
-    else
-      support::endian::Writer<support::big>(OS).write<uint16_t>(AddrDelta);
+    support::endian::write<uint16_t>(OS, AddrDelta, E);
   } else {
     assert(isUInt<32>(AddrDelta));
     OS << uint8_t(dwarf::DW_CFA_advance_loc4);
-    if (Context.getAsmInfo()->isLittleEndian())
-      support::endian::Writer<support::little>(OS).write<uint32_t>(AddrDelta);
-    else
-      support::endian::Writer<support::big>(OS).write<uint32_t>(AddrDelta);
+    support::endian::write<uint32_t>(OS, AddrDelta, E);
   }
 }