rust/tests/codegen/to_vec.rs

// compile-flags: -O

#![crate_type = "lib"]

// CHECK-LABEL: @copy_to_vec
#[no_mangle]
fn copy_to_vec(s: &[u64]) -> Vec<u64> {
  s.to_vec()
  // CHECK: call void @llvm.memcpy
}
Change slice::to_vec to not use extend_from_slice This also required adding a loop guard in case clone panics Add specialization for copy There is a better version for copy, so I've added specialization for that function and hopefully that should speed it up even more. Switch FromIter<slice::Iter> to use `to_vec` Test different unrolling version for to_vec Revert to impl From benchmarking, it appears this version is faster 2020-11-18 22:59:47 +00:00			`// compile-flags: -O`

			`#![crate_type = "lib"]`

			`// CHECK-LABEL: @copy_to_vec`
			`#[no_mangle]`
			`fn copy_to_vec(s: &[u64]) -> Vec<u64> {`
			`s.to_vec()`
			`// CHECK: call void @llvm.memcpy`
			`}`