tests/mir-opt/inline/inline_instruction_set.rs

   1 // Checks that only functions with the compatible instruction_set attributes are inlined.
   2 //
   3 // A function is "compatible" when the *callee* has the same attribute or no attribute.
   4 //
   5 // compile-flags: --target thumbv4t-none-eabi
   6 // needs-llvm-components: arm
   7
   8 #![crate_type = "lib"]
   9 #![feature(rustc_attrs)]
  10 #![feature(no_core, lang_items)]
  11 #![feature(isa_attribute)]
  12 #![no_core]
  13
  14 #[rustc_builtin_macro]
  15 #[macro_export]
  16 macro_rules! asm {
  17     ("assembly template",
  18         $(operands,)*
  19         $(options($(option),*))?
  20     ) => {
  21         /* compiler built-in */
  22     };
  23 }
  24
  25 #[lang = "sized"]
  26 trait Sized {}
  27 #[lang = "copy"]
  28 trait Copy {}
  29
  30 #[instruction_set(arm::a32)]
  31 #[inline]
  32 fn instruction_set_a32() {}
  33
  34 #[instruction_set(arm::t32)]
  35 #[inline]
  36 fn instruction_set_t32() {}
  37
  38 #[inline]
  39 fn instruction_set_default() {}
  40
  41 #[inline(always)]
  42 fn inline_always_and_using_inline_asm() {
  43     unsafe { asm!("/* do nothing */") };
  44 }
  45
  46 // EMIT_MIR inline_instruction_set.t32.Inline.diff
  47 #[instruction_set(arm::t32)]
  48 pub fn t32() {
  49     instruction_set_a32();
  50     instruction_set_t32();
  51     instruction_set_default();
  52     inline_always_and_using_inline_asm();
  53 }
  54
  55 // EMIT_MIR inline_instruction_set.default.Inline.diff
  56 pub fn default() {
  57     instruction_set_a32();
  58     instruction_set_t32();
  59     instruction_set_default();
  60     inline_always_and_using_inline_asm();
  61 }