[DebugInfo] Generate fixups as emitting DWARF .debug_frame/.eh_frame.

It is necessary to generate fixups in .debug_frame or .eh_frame as
relaxation is enabled due to the address delta may be changed after
relaxation.

There is an opcode with 6-bits data in debug frame encoding. So, we
also need 6-bits fixup types.

Differential Revision: https://reviews.llvm.org/D58335

llvm-svn: 366524

1 files changed, 4 insertions, 1 deletions

diff --git a/llvm/lib/MC/MCAsmBackend.cpp b/llvm/lib/MC/MCAsmBackend.cpp
index 9b1102cbe7d..b800e9caee2 100644
--- a/llvm/lib/MC/MCAsmBackend.cpp
+++ b/llvm/lib/MC/MCAsmBackend.cpp
@@ -73,6 +73,7 @@ const MCFixupKindInfo &MCAsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
       {"FK_Data_2", 0, 16, 0},
       {"FK_Data_4", 0, 32, 0},
       {"FK_Data_8", 0, 64, 0},
+      {"FK_Data_6b", 0, 6, 0},
       {"FK_PCRel_1", 0, 8, MCFixupKindInfo::FKF_IsPCRel},
       {"FK_PCRel_2", 0, 16, MCFixupKindInfo::FKF_IsPCRel},
       {"FK_PCRel_4", 0, 32, MCFixupKindInfo::FKF_IsPCRel},
@@ -93,10 +94,12 @@ const MCFixupKindInfo &MCAsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
       {"FK_Data_Add_2", 0, 16, 0},
       {"FK_Data_Add_4", 0, 32, 0},
       {"FK_Data_Add_8", 0, 64, 0},
+      {"FK_Data_Add_6b", 0, 6, 0},
       {"FK_Data_Sub_1", 0, 8, 0},
       {"FK_Data_Sub_2", 0, 16, 0},
       {"FK_Data_Sub_4", 0, 32, 0},
-      {"FK_Data_Sub_8", 0, 64, 0}};
+      {"FK_Data_Sub_8", 0, 64, 0},
+      {"FK_Data_Sub_6b", 0, 6, 0}};
 
   assert((size_t)Kind <= array_lengthof(Builtins) && "Unknown fixup kind");
   return Builtins[Kind];