diff options
Diffstat (limited to 'tests/ui/consts/const-eval/nrvo.rs')
-rw-r--r-- | tests/ui/consts/const-eval/nrvo.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/consts/const-eval/nrvo.rs b/tests/ui/consts/const-eval/nrvo.rs new file mode 100644 index 000000000..1d2c6acc0 --- /dev/null +++ b/tests/ui/consts/const-eval/nrvo.rs @@ -0,0 +1,26 @@ +// run-pass + +// When the NRVO is applied, the return place (`_0`) gets treated like a normal local. For example, +// its address may be taken and it may be written to indirectly. Ensure that MIRI can handle this. + +#![feature(const_mut_refs)] + +#[inline(never)] // Try to ensure that MIR optimizations don't optimize this away. +const fn init(buf: &mut [u8; 1024]) { + buf[33] = 3; + buf[444] = 4; +} + +const fn nrvo() -> [u8; 1024] { + let mut buf = [0; 1024]; + init(&mut buf); + buf +} + +const BUF: [u8; 1024] = nrvo(); + +fn main() { + assert_eq!(BUF[33], 3); + assert_eq!(BUF[19], 0); + assert_eq!(BUF[444], 4); +} |