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| author | bjorn3 <bjorn3@users.noreply.github.com> | 2019-08-30 15:41:33 +0200 |
|---|---|---|
| committer | bjorn3 <bjorn3@users.noreply.github.com> | 2019-08-30 15:42:07 +0200 |
| commit | 15b9834d7d37d601fd77db11f8852f9ceb0804d0 (patch) | |
| tree | 88cbecfbdd562beb49c4ea8f8fb978b2d97d5eb9 /example/example.rs | |
| parent | 76d2e085db71370cb34fc12fc544f46e557e743d (diff) | |
| download | rust-15b9834d7d37d601fd77db11f8852f9ceb0804d0.tar.gz rust-15b9834d7d37d601fd77db11f8852f9ceb0804d0.zip | |
Don't copy ByRef passed types to local stack slot when not necessary
Eg when the local is immutable **and** the type is freeze. This makes the simple raytracer runtime benchmark 1% faster than cg_llvm without optimizations. Before it was 2% slower. cc #691 cc #684
Diffstat (limited to 'example/example.rs')
| -rw-r--r-- | example/example.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/example/example.rs b/example/example.rs index e8ddc4aaea1..5878e8548d9 100644 --- a/example/example.rs +++ b/example/example.rs @@ -202,3 +202,7 @@ fn get_sized_field_ref_from_unsized_type(u: &Unsized) -> &u8 { fn get_unsized_field_ref_from_unsized_type(u: &Unsized) -> &str { &u.1 } + +pub fn reuse_byref_argument_storage(a: (u8, u16, u32)) -> u8 { + a.0 +} |