src/test/codegen/integer-cmp.rs

   1 // This is test for more optimal Ord implementation for integers.
   2 // See <https://github.com/rust-lang/rust/issues/63758> for more info.
   3
   4 // compile-flags: -C opt-level=3
   5
   6 #![crate_type = "lib"]
   7
   8 use std::cmp::Ordering;
   9
  10 // CHECK-LABEL: @cmp_signed
  11 #[no_mangle]
  12 pub fn cmp_signed(a: i64, b: i64) -> Ordering {
  13 // CHECK: icmp slt
  14 // CHECK: icmp ne
  15 // CHECK: zext i1
  16 // CHECK: select i1
  17     a.cmp(&b)
  18 }
  19
  20 // CHECK-LABEL: @cmp_unsigned
  21 #[no_mangle]
  22 pub fn cmp_unsigned(a: u32, b: u32) -> Ordering {
  23 // CHECK: icmp ult
  24 // CHECK: icmp ne
  25 // CHECK: zext i1
  26 // CHECK: select i1
  27     a.cmp(&b)
  28 }