tests/ui/target-feature/no-llvm-leaks.rs

   1 // revisions: aarch64 x86-64
   2 // [aarch64] compile-flags: -Ctarget-feature=+neon,+fp16,+fhm --target=aarch64-unknown-linux-gnu
   3 // [aarch64] needs-llvm-components: aarch64
   4 // [x86-64] compile-flags: -Ctarget-feature=+sse4.2,+rdrand --target=x86_64-unknown-linux-gnu
   5 // [x86-64] needs-llvm-components: x86
   6 // build-pass
   7 #![no_core]
   8 #![crate_type = "rlib"]
   9 #![feature(intrinsics, rustc_attrs, no_core, lang_items, staged_api)]
  10 #![stable(feature = "test", since = "1.0.0")]
  11
  12 // Supporting minimal rust core code
  13 #[lang = "sized"]
  14 trait Sized {}
  15 #[lang = "copy"]
  16 trait Copy {}
  17 impl Copy for bool {}
  18
  19 extern "rust-intrinsic" {
  20     #[rustc_const_stable(feature = "test", since = "1.0.0")]
  21     fn unreachable() -> !;
  22 }
  23
  24 #[rustc_builtin_macro]
  25 macro_rules! cfg {
  26     ($($cfg:tt)*) => {};
  27 }
  28
  29 // Test code
  30 const fn do_or_die(cond: bool) {
  31     if cond {
  32     } else {
  33         unsafe { unreachable() }
  34     }
  35 }
  36
  37 macro_rules! assert {
  38     ($x:expr $(,)?) => {
  39         const _: () = do_or_die($x);
  40     };
  41 }
  42
  43
  44 #[cfg(target_arch = "aarch64")]
  45 fn check_aarch64() {
  46     // This checks that the rustc feature name is used, not the LLVM feature.
  47     assert!(cfg!(target_feature = "neon"));
  48     assert!(cfg!(not(target_feature = "fp-armv8")));
  49     assert!(cfg!(target_feature = "fhm"));
  50     assert!(cfg!(not(target_feature = "fp16fml")));
  51     assert!(cfg!(target_feature = "fp16"));
  52     assert!(cfg!(not(target_feature = "fullfp16")));
  53 }
  54
  55 #[cfg(target_arch = "x86_64")]
  56 fn check_x86_64() {
  57     // This checks that the rustc feature name is used, not the LLVM feature.
  58     assert!(cfg!(target_feature = "rdrand"));
  59     assert!(cfg!(not(target_feature = "rdrnd")));
  60
  61     // Likewise: We enable LLVM's crc32 feature with SSE4.2, but Rust says it's just SSE4.2
  62     assert!(cfg!(target_feature = "sse4.2"));
  63     assert!(cfg!(not(target_feature = "crc32")));
  64 }