[clang] [llvm] [BPF] introduce `__attribute__((bpf_fastcall))` (PR #101228)

[via cfe-commits]

================
@@ -0,0 +1,7 @@
+// REQUIRES: bpf-registered-target
+// RUN: %clang_cc1 %s -triple bpf -verify
+
+__attribute__((bpf_fastcall)) int var; // expected-warning {{'bpf_fastcall' attribute only applies to functions and function pointers}}
+
+__attribute__((bpf_fastcall)) void func();
+__attribute__((bpf_fastcall(1))) void func_invalid(); // expected-error {{'bpf_fastcall' attribute takes no arguments}}
----------------
eddyz87 wrote:

Sure, will do, thank you for the review

https://github.com/llvm/llvm-project/pull/101228