| //@ compile-flags: -C opt-level=1 |
| //@ only-64bit (because we're using [ui]size) |
| |
| #![crate_type = "lib"] |
| #![feature(core_intrinsics)] |
| |
| //! Basic optimizations are enabled because otherwise `x86_64-gnu-nopt` had an alloca. |
| //! Uses a type with non-power-of-two size to avoid normalizations to shifts. |
| |
| use std::intrinsics::*; |
| |
| type RGB = [u8; 3]; |
| |
| // CHECK-LABEL: @offset_from_odd_size |
| #[no_mangle] |
| pub unsafe fn offset_from_odd_size(a: *const RGB, b: *const RGB) -> isize { |
| // CHECK: start |
| // CHECK-NEXT: ptrtoint |
| // CHECK-NEXT: ptrtoint |
| // CHECK-NEXT: sub i64 |
| // CHECK-NEXT: sdiv exact i64 %{{[0-9]+}}, 3 |
| // CHECK-NEXT: ret i64 |
| ptr_offset_from(a, b) |
| } |
| |
| // CHECK-LABEL: @offset_from_unsigned_odd_size |
| #[no_mangle] |
| pub unsafe fn offset_from_unsigned_odd_size(a: *const RGB, b: *const RGB) -> usize { |
| // CHECK: start |
| // CHECK-NEXT: ptrtoint |
| // CHECK-NEXT: ptrtoint |
| // CHECK-NEXT: sub nuw i64 |
| // CHECK-NEXT: udiv exact i64 %{{[0-9]+}}, 3 |
| // CHECK-NEXT: ret i64 |
| ptr_offset_from_unsigned(a, b) |
| } |
