1 // compile-flags: -C opt-level=1
2 // only-64bit (because we're using [ui]size)
5 #![feature(core_intrinsics)]
7 //! Basic optimizations are enabled because otherwise `x86_64-gnu-nopt` had an alloca.
8 //! Uses a type with non-power-of-two size to avoid normalizations to shifts.
10 use std::intrinsics::*;
14 // CHECK-LABEL: @offset_from_odd_size
16 pub unsafe fn offset_from_odd_size(a: *const RGB, b: *const RGB) -> isize {
18 // CHECK-NEXT: ptrtoint
19 // CHECK-NEXT: ptrtoint
20 // CHECK-NEXT: sub i64
21 // CHECK-NEXT: sdiv exact i64 %{{[0-9]+}}, 3
22 // CHECK-NEXT: ret i64
26 // CHECK-LABEL: @offset_from_unsigned_odd_size
28 pub unsafe fn offset_from_unsigned_odd_size(a: *const RGB, b: *const RGB) -> usize {
30 // CHECK-NEXT: ptrtoint
31 // CHECK-NEXT: ptrtoint
32 // CHECK-NEXT: sub nuw i64
33 // CHECK-NEXT: udiv exact i64 %{{[0-9]+}}, 3
34 // CHECK-NEXT: ret i64
35 ptr_offset_from_unsigned(a, b)