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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/assembly/niche-prefer-zero.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/assembly/niche-prefer-zero.rs')
-rw-r--r-- | tests/assembly/niche-prefer-zero.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/assembly/niche-prefer-zero.rs b/tests/assembly/niche-prefer-zero.rs new file mode 100644 index 000000000..0ab37a618 --- /dev/null +++ b/tests/assembly/niche-prefer-zero.rs @@ -0,0 +1,25 @@ +// Check that niche selection prefers zero and that jumps are optimized away. +// See https://github.com/rust-lang/rust/pull/87794 +// assembly-output: emit-asm +// only-x86 +// compile-flags: -Copt-level=3 + +#![crate_type = "lib"] + +#[repr(u8)] +pub enum Size { + One = 1, + Two = 2, + Three = 3, +} + +#[no_mangle] +pub fn handle(x: Option<Size>) -> u8 { + match x { + None => 0, + Some(size) => size as u8, + } +} + +// There should be no jumps in output +// CHECK-NOT: j |