Revert "[PAC][AArch64] Lower ptrauth constants in code (#94241)" (#96865)

This reverts #94241.

See buildbot failure
https://lab.llvm.org/buildbot/#/builders/51/builds/570

Author: kovdan01

llvm/docs/GlobalISel/GenericOpcode.rst

@@ -60,17 +60,6 @@ The address of a global value.
 
   %0(p0) = G_GLOBAL_VALUE @var_local
 
-G_PTRAUTH_GLOBAL_VALUE
-^^^^^^^^^^^^^^^^^^^^^^
-
-The signed address of a global value. Operands: address to be signed (pointer),
-key (32-bit imm), address for address discrimination (zero if not needed) and
-an extra discriminator (64-bit imm).
-
-.. code-block:: none
-
-  %0:_(p0) = G_PTRAUTH_GLOBAL_VALUE %1:_(p0), s32, %2:_(p0), s64
-
 G_BLOCK_ADDR
 ^^^^^^^^^^^^
 

llvm/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h

@@ -886,13 +886,6 @@ class MachineIRBuilder {
   MachineInstrBuilder buildFConstant(const DstOp &Res, double Val);
   MachineInstrBuilder buildFConstant(const DstOp &Res, const APFloat &Val);
 
-  /// Build and insert G_PTRAUTH_GLOBAL_VALUE
-  ///
-  /// \return a MachineInstrBuilder for the newly created instruction.
-  MachineInstrBuilder buildConstantPtrAuth(const DstOp &Res,
-                                           const ConstantPtrAuth *CPA,
-                                           Register Addr, Register AddrDisc);
-
   /// Build and insert \p Res = COPY Op
   ///
   /// Register-to-register COPY sets \p Res to \p Op.

llvm/include/llvm/CodeGen/ISDOpcodes.h

@@ -83,12 +83,6 @@ enum NodeType {
   ExternalSymbol,
   BlockAddress,
 
-  /// A ptrauth constant.
-  /// ptr, key, addr-disc, disc
-  /// Note that the addr-disc can be a non-constant value, to allow representing
-  /// a constant global address signed using address-diversification, in code.
-  PtrAuthGlobalAddress,
-
   /// The address of the GOT
   GLOBAL_OFFSET_TABLE,
 

llvm/include/llvm/CodeGen/MachineModuleInfoImpls.h

@@ -61,20 +61,10 @@ class MachineModuleInfoMachO : public MachineModuleInfoImpl {
 /// MachineModuleInfoELF - This is a MachineModuleInfoImpl implementation
 /// for ELF targets.
 class MachineModuleInfoELF : public MachineModuleInfoImpl {
-public:
-  struct AuthStubInfo {
-    const MCExpr *AuthPtrRef;
-  };
-
-private:
   /// GVStubs - These stubs are used to materialize global addresses in PIC
   /// mode.
   DenseMap<MCSymbol *, StubValueTy> GVStubs;
 
-  /// AuthPtrStubs - These stubs are used to materialize signed addresses for
-  /// extern_weak symbols.
-  DenseMap<MCSymbol *, AuthStubInfo> AuthPtrStubs;
-
   virtual void anchor(); // Out of line virtual method.
 
 public:
@@ -85,19 +75,9 @@ class MachineModuleInfoELF : public MachineModuleInfoImpl {
     return GVStubs[Sym];
   }
 
-  AuthStubInfo &getAuthPtrStubEntry(MCSymbol *Sym) {
-    assert(Sym && "Key cannot be null");
-    return AuthPtrStubs[Sym];
-  }
-
   /// Accessor methods to return the set of stubs in sorted order.
 
   SymbolListTy GetGVStubList() { return getSortedStubs(GVStubs); }
-
-  using AuthStubPairTy = std::pair<MCSymbol *, AuthStubInfo>;
-  typedef std::vector<AuthStubPairTy> AuthStubListTy;
-
-  AuthStubListTy getAuthGVStubList();
 };
 
 /// MachineModuleInfoCOFF - This is a MachineModuleInfoImpl implementation

llvm/include/llvm/Support/TargetOpcodes.def

@@ -294,9 +294,6 @@ HANDLE_TARGET_OPCODE(G_FRAME_INDEX)
 /// Generic reference to global value.
 HANDLE_TARGET_OPCODE(G_GLOBAL_VALUE)
 
-/// Generic ptrauth-signed reference to global value.
-HANDLE_TARGET_OPCODE(G_PTRAUTH_GLOBAL_VALUE)
-
 /// Generic instruction to materialize the address of an object in the constant
 /// pool.
 HANDLE_TARGET_OPCODE(G_CONSTANT_POOL)

llvm/include/llvm/Target/GenericOpcodes.td

@@ -110,12 +110,6 @@ def G_GLOBAL_VALUE : GenericInstruction {
   let hasSideEffects = false;
 }
 
-def G_PTRAUTH_GLOBAL_VALUE : GenericInstruction {
-  let OutOperandList = (outs type0:$dst);
-  let InOperandList = (ins unknown:$addr, i32imm:$key, type1:$addrdisc, i64imm:$disc);
-  let hasSideEffects = 0;
-}
-
 def G_CONSTANT_POOL : GenericInstruction {
   let OutOperandList = (outs type0:$dst);
   let InOperandList = (ins unknown:$src);

llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp

@@ -3494,11 +3494,7 @@ bool IRTranslator::translate(const Constant &C, Register Reg) {
     EntryBuilder->buildConstant(Reg, 0);
   else if (auto GV = dyn_cast<GlobalValue>(&C))
     EntryBuilder->buildGlobalValue(Reg, GV);
-  else if (auto CPA = dyn_cast<ConstantPtrAuth>(&C)) {
-    Register Addr = getOrCreateVReg(*CPA->getPointer());
-    Register AddrDisc = getOrCreateVReg(*CPA->getAddrDiscriminator());
-    EntryBuilder->buildConstantPtrAuth(Reg, CPA, Addr, AddrDisc);
-  } else if (auto CAZ = dyn_cast<ConstantAggregateZero>(&C)) {
+  else if (auto CAZ = dyn_cast<ConstantAggregateZero>(&C)) {
     if (!isa<FixedVectorType>(CAZ->getType()))
       return false;
     // Return the scalar if it is a <1 x Ty> vector.

llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp

@@ -397,19 +397,6 @@ MachineInstrBuilder MachineIRBuilder::buildFConstant(const DstOp &Res,
   return buildFConstant(Res, *CFP);
 }
 
-MachineInstrBuilder
-MachineIRBuilder::buildConstantPtrAuth(const DstOp &Res,
-                                       const ConstantPtrAuth *CPA,
-                                       Register Addr, Register AddrDisc) {
-  auto MIB = buildInstr(TargetOpcode::G_PTRAUTH_GLOBAL_VALUE);
-  Res.addDefToMIB(*getMRI(), MIB);
-  MIB.addUse(Addr);
-  MIB.addImm(CPA->getKey()->getZExtValue());
-  MIB.addUse(AddrDisc);
-  MIB.addImm(CPA->getDiscriminator()->getZExtValue());
-  return MIB;
-}
-
 MachineInstrBuilder MachineIRBuilder::buildBrCond(const SrcOp &Tst,
                                                   MachineBasicBlock &Dest) {
   assert(Tst.getLLTTy(*getMRI()).isScalar() && "invalid operand type");

llvm/lib/CodeGen/MachineModuleInfoImpls.cpp

@@ -13,7 +13,6 @@
 
 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
 #include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/STLExtras.h"
 #include "llvm/MC/MCSymbol.h"
 
 using namespace llvm;
@@ -42,25 +41,3 @@ MachineModuleInfoImpl::SymbolListTy MachineModuleInfoImpl::getSortedStubs(
   Map.clear();
   return List;
 }
-
-template <typename MachineModuleInfoTarget>
-static typename MachineModuleInfoTarget::AuthStubListTy getAuthGVStubListHelper(
-    DenseMap<MCSymbol *, typename MachineModuleInfoTarget::AuthStubInfo>
-        &AuthPtrStubs) {
-  typename MachineModuleInfoTarget::AuthStubListTy List(AuthPtrStubs.begin(),
-                                                        AuthPtrStubs.end());
-
-  if (!List.empty())
-    llvm::sort(List.begin(), List.end(),
-               [](const typename MachineModuleInfoTarget::AuthStubPairTy &LHS,
-                  const typename MachineModuleInfoTarget::AuthStubPairTy &RHS) {
-                 return LHS.first->getName() < RHS.first->getName();
-               });
-
-  AuthPtrStubs.clear();
-  return List;
-}
-
-MachineModuleInfoELF::AuthStubListTy MachineModuleInfoELF::getAuthGVStubList() {
-  return getAuthGVStubListHelper<MachineModuleInfoELF>(AuthPtrStubs);
-}

llvm/lib/CodeGen/MachineVerifier.cpp

@@ -2066,12 +2066,6 @@ void MachineVerifier::verifyPreISelGenericInstruction(const MachineInstr *MI) {
       report("Dst operand 0 must be a pointer", MI);
     break;
   }
-  case TargetOpcode::G_PTRAUTH_GLOBAL_VALUE: {
-    const MachineOperand &AddrOp = MI->getOperand(1);
-    if (!AddrOp.isReg() || !MRI->getType(AddrOp.getReg()).isPointer())
-      report("addr operand must be a pointer", &AddrOp, 1);
-    break;
-  }
   default:
     break;
   }