Revert r343089 "[AArch64] - Return address signing dwarf support"

This caused the DebugInfo/Sparc/gnu-window-save.ll test to fail.

> Functions that have signed return addresses need additional dwarf support:
> - After signing the LR, and before authenticating it, the LR register is in a
>   state the is unusable by a debugger or unwinder
> - To account for this a new directive, .cfi_negate_ra_state, is added
> - This directive says the signed state of the LR register has now changed,
>   i.e. unsigned -> signed or signed -> unsigned
> - This directive has the same CFA code as the SPARC directive GNU_window_save
>   (0x2d), adding a macro to account for multiply defined codes
> - This patch matches the gcc implementation of this support:
>   https://patchwork.ozlabs.org/patch/800271/
>
> Differential Revision: https://reviews.llvm.org/D50136

llvm-svn: 343103

6 files changed, 0 insertions, 15 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
index afce3ad3133..60558847067 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
@@ -212,9 +212,6 @@ void AsmPrinter::emitCFIInstruction(const MCCFIInstruction &Inst) const {
   case MCCFIInstruction::OpWindowSave:
     OutStreamer->EmitCFIWindowSave();
     break;
-  case MCCFIInstruction::OpNegateRAState:
-    OutStreamer->EmitCFINegateRAState();
-    break;
   case MCCFIInstruction::OpSameValue:
     OutStreamer->EmitCFISameValue(Inst.getRegister());
     break;
diff --git a/llvm/lib/CodeGen/CFIInstrInserter.cpp b/llvm/lib/CodeGen/CFIInstrInserter.cpp
index c4799855a2b..4fd119430cf 100644
--- a/llvm/lib/CodeGen/CFIInstrInserter.cpp
+++ b/llvm/lib/CodeGen/CFIInstrInserter.cpp
@@ -207,7 +207,6 @@ void CFIInstrInserter::calculateOutgoingCFAInfo(MBBCFAInfo &MBBInfo) {
       case MCCFIInstruction::OpUndefined:
       case MCCFIInstruction::OpRegister:
       case MCCFIInstruction::OpWindowSave:
-      case MCCFIInstruction::OpNegateRAState:
       case MCCFIInstruction::OpGnuArgsSize:
         break;
       }
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index ce061f8e9b8..f7cc94e34a5 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -220,7 +220,6 @@ 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 813c539f648..dffa4f74544 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -89,7 +89,6 @@ 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 4cdf2b437f5..5c6a41af97a 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -1816,9 +1816,6 @@ 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))
@@ -2111,7 +2108,6 @@ 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);
diff --git a/llvm/lib/CodeGen/MachineOperand.cpp b/llvm/lib/CodeGen/MachineOperand.cpp
index 792aa9f0f16..a116d8fe877 100644
--- a/llvm/lib/CodeGen/MachineOperand.cpp
+++ b/llvm/lib/CodeGen/MachineOperand.cpp
@@ -696,11 +696,6 @@ static void printCFI(raw_ostream &OS, const MCCFIInstruction &CFI,
     if (MCSymbol *Label = CFI.getLabel())
       MachineOperand::printSymbol(OS, *Label);
     break;
-  case MCCFIInstruction::OpNegateRAState:
-    OS << "negate_ra_sign_state ";
-    if (MCSymbol *Label = CFI.getLabel())
-      MachineOperand::printSymbol(OS, *Label);
-    break;
   default:
     // TODO: Print the other CFI Operations.
     OS << "<unserializable cfi directive>";