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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/assembly/niche-prefer-zero.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/assembly/niche-prefer-zero.rs')
-rw-r--r-- | src/test/assembly/niche-prefer-zero.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/assembly/niche-prefer-zero.rs b/src/test/assembly/niche-prefer-zero.rs new file mode 100644 index 000000000..0ab37a618 --- /dev/null +++ b/src/test/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 |