Reapply changes reverted by r343235

- Add fix so that all code paths that create DWARFContext
  with an ObjectFile initialise the target architecture in the context
- Add an assert that the Arch is known in the Dwarf CallFrameString method

llvm-svn: 343317

3 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index f7cc94e34a5..ce061f8e9b8 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -220,6 +220,7 @@ static MIToken::TokenKind getIdentifierKind(StringRef Identifier) {
       .Case("undefined", MIToken::kw_cfi_undefined)
       .Case("register", MIToken::kw_cfi_register)
       .Case("window_save", MIToken::kw_cfi_window_save)
+      .Case("negate_ra_sign_state", MIToken::kw_cfi_aarch64_negate_ra_sign_state)
       .Case("blockaddress", MIToken::kw_blockaddress)
       .Case("intrinsic", MIToken::kw_intrinsic)
       .Case("target-index", MIToken::kw_target_index)
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index dffa4f74544..813c539f648 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -89,6 +89,7 @@ struct MIToken {
     kw_cfi_restore_state,
     kw_cfi_undefined,
     kw_cfi_window_save,
+    kw_cfi_aarch64_negate_ra_sign_state,
     kw_blockaddress,
     kw_intrinsic,
     kw_target_index,
diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index 5c6a41af97a..4cdf2b437f5 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -1816,6 +1816,9 @@ bool MIParser::parseCFIOperand(MachineOperand &Dest) {
   case MIToken::kw_cfi_window_save:
     CFIIndex = MF.addFrameInst(MCCFIInstruction::createWindowSave(nullptr));
     break;
+  case MIToken::kw_cfi_aarch64_negate_ra_sign_state:
+    CFIIndex = MF.addFrameInst(MCCFIInstruction::createNegateRAState(nullptr));
+    break;
   case MIToken::kw_cfi_escape: {
     std::string Values;
     if (parseCFIEscapeValues(Values))
@@ -2108,6 +2111,7 @@ bool MIParser::parseMachineOperand(MachineOperand &Dest,
   case MIToken::kw_cfi_restore_state:
   case MIToken::kw_cfi_undefined:
   case MIToken::kw_cfi_window_save:
+  case MIToken::kw_cfi_aarch64_negate_ra_sign_state:
     return parseCFIOperand(Dest);
   case MIToken::kw_blockaddress:
     return parseBlockAddressOperand(Dest);