[clang] [llvm] [AMDGPU][clang][CodeGen][opt] Add late-resolved feature identifying predicates (PR #134016)

[Erich Keane via cfe-commits]

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@@ -6653,6 +6654,22 @@ ExprResult Sema::BuildCallExpr(Scope *Scope, Expr *Fn, SourceLocation LParenLoc,
   if (Result.isInvalid()) return ExprError();
   Fn = Result.get();
 
+  // The __builtin_amdgcn_is_invocable builtin is special, and will be resolved
+  // later, when we check boolean conditions, for now we merely forward it
+  // without any additional checking.
+  if (Fn->getType() == Context.BuiltinFnTy && ArgExprs.size() == 1 &&
+      ArgExprs[0]->getType() == Context.BuiltinFnTy) {
+    auto *FD = cast<FunctionDecl>(Fn->getReferencedDeclOfCallee());
+
+    if (FD->getName() == "__builtin_amdgcn_is_invocable") {
+      auto FnPtrTy = Context.getPointerType(FD->getType());
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erichkeane wrote:

More 'auto' use.

https://github.com/llvm/llvm-project/pull/134016