src/test/codegen/issue-59352.rs

   1 // This test is a mirror of mir-opt/issues/issue-59352.rs. The LLVM inliner doesn't inline
   2 // `char::method::is_digit()` and `char::method::to_digit()`, probably because of their size.
   3 //
   4 // Currently, the MIR optimizer isn't capable of removing the unreachable panic in this test case.
   5 // Once the optimizer can do that, mir-opt/issues/issue-59352.rs will need to be updated and this
   6 // test case should be removed as it will become redundant.
   7
   8 // mir-opt-level=3 enables inlining and enables LLVM to optimize away the unreachable panic call.
   9 // compile-flags: -O -Z mir-opt-level=3
  10
  11 #![crate_type = "rlib"]
  12
  13 // CHECK-LABEL: @num_to_digit
  14 #[no_mangle]
  15 pub fn num_to_digit(num: char) -> u32 {
  16     // CHECK-NOT: panic
  17     if num.is_digit(8) { num.to_digit(8).unwrap() } else { 0 }
  18 }