[clang][bytecode] Handle UETT_PtrAuthTypeDiscriminator (#122941)

Author: tbaederr

clang/lib/AST/ByteCode/Compiler.cpp

@@ -2141,6 +2141,16 @@ bool Compiler<Emitter>::VisitUnaryExprOrTypeTraitExpr(
     return this->emitConst(ASTCtx.toCharUnitsFromBits(Bits).getQuantity(), E);
   }
 
+  if (Kind == UETT_PtrAuthTypeDiscriminator) {
+    if (E->getArgumentType()->isDependentType())
+      return this->emitInvalid(E);
+
+    return this->emitConst(
+        const_cast<ASTContext &>(ASTCtx).getPointerAuthTypeDiscriminator(
+            E->getArgumentType()),
+        E);
+  }
+
   return false;
 }
 

clang/test/SemaCXX/ptrauth-type-discriminator.cpp

@@ -1,6 +1,9 @@
 // RUN: %clang_cc1 -triple arm64-apple-ios -std=c++17 -Wno-vla -fsyntax-only -verify -fptrauth-intrinsics %s
 // RUN: %clang_cc1 -triple aarch64-linux-gnu -std=c++17 -Wno-vla -fsyntax-only -verify -fptrauth-intrinsics %s
 
+// RUN: %clang_cc1 -triple arm64-apple-ios -std=c++17 -Wno-vla -fsyntax-only -verify -fptrauth-intrinsics -fexperimental-new-constant-interpreter %s
+// RUN: %clang_cc1 -triple aarch64-linux-gnu -std=c++17 -Wno-vla -fsyntax-only -verify -fptrauth-intrinsics -fexperimental-new-constant-interpreter %s
+
 // RUN: not %clang_cc1 -triple arm64-apple-ios -std=c++17 -Wno-vla -fsyntax-only %s 2>&1 | FileCheck %s
 // CHECK: this target does not support pointer authentication