[MC/Dwarf] Encode DW_CFA_advance_loc in target endianess.

This matches GNU as output.

llvm-svn: 239911

1 files changed, 8 insertions, 9 deletions

diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index 90f96e2cef5..c84c4865f51 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -1590,18 +1590,17 @@ void MCDwarfFrameEmitter::EncodeAdvanceLoc(MCContext &Context,
     OS << uint8_t(dwarf::DW_CFA_advance_loc1);
     OS << uint8_t(AddrDelta);
   } else if (isUInt<16>(AddrDelta)) {
-    // FIXME: check what is the correct behavior on a big endian machine.
     OS << uint8_t(dwarf::DW_CFA_advance_loc2);
-    OS << uint8_t( AddrDelta       & 0xff);
-    OS << uint8_t((AddrDelta >> 8) & 0xff);
+    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);
   } else {
-    // FIXME: check what is the correct behavior on a big endian machine.
     assert(isUInt<32>(AddrDelta));
     OS << uint8_t(dwarf::DW_CFA_advance_loc4);
-    OS << uint8_t( AddrDelta        & 0xff);
-    OS << uint8_t((AddrDelta >> 8)  & 0xff);
-    OS << uint8_t((AddrDelta >> 16) & 0xff);
-    OS << uint8_t((AddrDelta >> 24) & 0xff);
-
+    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);
   }
 }