================
@@ -441,6 +445,254 @@ bool
PreISelIntrinsicLowering::expandMemIntrinsicUses(Function &F) const {
return Changed;
}
+namespace {
+
+enum class PointerEncoding {
+ Rotate,
+ PACCopyable,
+ PACNonCopyable,
+};
+
+bool expandProtectedFieldPtr(Function &Intr) {
+ Module &M = *Intr.getParent();
+ bool IsAArch64 = Triple(M.getTargetTriple()).isAArch64();
+
+ std::set<Metadata *> NonPFPFields;
+ std::set<Instruction *> LoadsStores;
+
+ Type *Int8Ty = Type::getInt8Ty(M.getContext());
+ Type *Int64Ty = Type::getInt64Ty(M.getContext());
+ PointerType *PtrTy = PointerType::get(M.getContext(), 0);
+
+ Function *SignIntr =
+ Intrinsic::getOrInsertDeclaration(&M, Intrinsic::ptrauth_sign, {});
+ Function *AuthIntr =
+ Intrinsic::getOrInsertDeclaration(&M, Intrinsic::ptrauth_auth, {});
+
+ auto *EmuFnTy = FunctionType::get(Int64Ty, {Int64Ty, Int64Ty}, false);
+ FunctionCallee EmuSignIntr = M.getOrInsertFunction("__emupac_pacda",
EmuFnTy);
+ FunctionCallee EmuAuthIntr = M.getOrInsertFunction("__emupac_autda",
EmuFnTy);
+
+ auto CreateSign = [&](IRBuilder<> &B, Value *Val, Value *Disc,
+ OperandBundleDef DSBundle) {
+ Function *F = B.GetInsertBlock()->getParent();
+ Attribute FSAttr = F->getFnAttribute("target-features");
+ if (FSAttr.isValid() && FSAttr.getValueAsString().contains("+pauth"))
+ return B.CreateCall(SignIntr, {Val, B.getInt32(2), Disc}, DSBundle);
+ return B.CreateCall(EmuSignIntr, {Val, Disc}, DSBundle);
+ };
+
+ auto CreateAuth = [&](IRBuilder<> &B, Value *Val, Value *Disc,
+ OperandBundleDef DSBundle) {
+ Function *F = B.GetInsertBlock()->getParent();
+ Attribute FSAttr = F->getFnAttribute("target-features");
+ if (FSAttr.isValid() && FSAttr.getValueAsString().contains("+pauth"))
+ return B.CreateCall(AuthIntr, {Val, B.getInt32(2), Disc}, DSBundle);
+ return B.CreateCall(EmuAuthIntr, {Val, Disc}, DSBundle);
+ };
+
+ for (User *U : Intr.users()) {
+ auto *Call = cast<CallInst>(U);
+ auto *FieldName = cast<Metadata>(
----------------
ojhunt wrote:
that would definitely be my preference, and I _think_ it should end up being
simpler.
https://github.com/llvm/llvm-project/pull/133538
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