Rename `tests/codegen` into `tests/codegen-llvm`

2025-07-22T12:28:48+00:00

tests/codegen: use -Copt-level=3 instead of -O

2025-02-11T21:41:35+00:00

add codegen test

2024-10-22T09:25:38+00:00

allocate before calling T::default in >::default()

2024-10-10T13:50:35+00:00

Same rationale as in the previous commit.

allocate before calling T::default in >::default()

2024-10-10T13:49:24+00:00

The `Box` impl currently calls `T::default()` before allocating the `Box`. Most `Default` impls are trivial, which should in theory allow LLVM to construct `T: Default` directly in the `Box` allocation when calling `>::default()`. However, the allocation may fail, which necessitates calling `T's` destructor if it has one. If the destructor is non-trivial, then LLVM has a hard time proving that it's sound to elide, which makes it construct `T` on the stack first, and then copy it into the allocation. Create an uninit `Box` first, and then write `T::default` into it, so that LLVM now only needs to prove that the `T::default` can't panic, which should be trivial for most `Default` impls.

add initial tests for placement new changes

2024-10-10T13:47:26+00:00

rust/tests/codegen/placement-new.rs, branch try-perf

Rename `tests/codegen` into `tests/codegen-llvm`

tests/codegen: use -Copt-level=3 instead of -O

add codegen test

allocate before calling T::default in >::default()

allocate before calling T::default in >::default()

add initial tests for placement new changes