[llvm-branch-commits] [clang] [clang] Define ptrauth_string_discriminator builtin. (PR #93903)

[Daniil Kovalev via llvm-branch-commits]

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@@ -12583,6 +12584,12 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
   case Builtin::BI__builtin_expect_with_probability:
     return Visit(E->getArg(0));
 
+  case Builtin::BI__builtin_ptrauth_string_discriminator: {
+    auto literal = cast<StringLiteral>(E->getArg(0)->IgnoreParenImpCasts());
+    auto result = getPointerAuthStableSipHash16(literal->getString());
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kovdan01 wrote:

Does `auto` increase readability here? `uint64_t Result` IMHO looks better - at least, with `auto` it's not obvious which type the variable has.

https://github.com/llvm/llvm-project/pull/93903