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| author | Scott McMurray <scottmcm@users.noreply.github.com> | 2022-10-02 12:26:58 -0700 |
|---|---|---|
| committer | Scott McMurray <scottmcm@users.noreply.github.com> | 2022-10-02 12:26:58 -0700 |
| commit | 31cd0aa823a379b6c0d0f66ba4172585d1780e8b (patch) | |
| tree | 0a8ee7464e6389545ca1651df2d14a53362c5985 /src/test/codegen | |
| parent | fe217c28ffc6955f0927d8e8715d43d727debe5a (diff) | |
| download | rust-31cd0aa823a379b6c0d0f66ba4172585d1780e8b.tar.gz rust-31cd0aa823a379b6c0d0f66ba4172585d1780e8b.zip | |
Do the `calloc` optimization for `Option<bool>`
Inspired by <https://old.reddit.com/r/rust/comments/xtiqj8/why_is_this_functional_version_faster_than_my_for/iqqy37b/>.
Diffstat (limited to 'src/test/codegen')
| -rw-r--r-- | src/test/codegen/vec-calloc.rs | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/test/codegen/vec-calloc.rs b/src/test/codegen/vec-calloc.rs index 435a4ab5187..ae6e448f172 100644 --- a/src/test/codegen/vec-calloc.rs +++ b/src/test/codegen/vec-calloc.rs @@ -1,4 +1,4 @@ -// compile-flags: -O +// compile-flags: -O -Z merge-functions=disabled // only-x86_64 // ignore-debug // min-llvm-version: 15.0 @@ -144,6 +144,23 @@ pub fn vec_non_zero_tuple(n: usize) -> Vec<(i16, u8, char)> { vec![(0, 0, 'A'); n] } +// CHECK-LABEL: @vec_option_bool +#[no_mangle] +pub fn vec_option_bool(n: usize) -> Vec<Option<bool>> { + // CHECK-NOT: call {{.*}}alloc::vec::from_elem + // CHECK-NOT: call {{.*}}reserve + // CHECK-NOT: call {{.*}}__rust_alloc( + + // CHECK: call {{.*}}__rust_alloc_zeroed( + + // CHECK-NOT: call {{.*}}alloc::vec::from_elem + // CHECK-NOT: call {{.*}}reserve + // CHECK-NOT: call {{.*}}__rust_alloc( + + // CHECK: ret void + vec![Some(false); n] +} + // Ensure that __rust_alloc_zeroed gets the right attributes for LLVM to optimize it away. // CHECK: declare noalias ptr @__rust_alloc_zeroed(i64, i64 allocalign) unnamed_addr [[RUST_ALLOC_ZEROED_ATTRS:#[0-9]+]] |