bors 0d410be23c Auto merge of #115515 - the8472:zip-for-arrays, r=scottmcm ...

optimize zipping over array iterators

Fixes #115339 (somewhat)

the new assembly:

```asm
zip_arrays:
        .cfi_startproc
        vmovups (%rdx), %ymm0
        leaq    32(%rsi), %rcx
        vxorps  %xmm1, %xmm1, %xmm1
        vmovups %xmm1, -24(%rsp)
        movq    $0, -8(%rsp)
        movq    %rsi, -88(%rsp)
        movq    %rdi, %rax
        movq    %rcx, -80(%rsp)
        vmovups %ymm0, -72(%rsp)
        movq    $0, -40(%rsp)
        movq    $32, -32(%rsp)
        movq    -24(%rsp), %rcx
        vmovups (%rsi,%rcx), %ymm0
        vorps   -72(%rsp,%rcx), %ymm0, %ymm0
        vmovups %ymm0, (%rsi,%rcx)
        vmovups (%rsi), %ymm0
        vmovups %ymm0, (%rdi)
        vzeroupper
        retq
```

This is still longer than the slice version given in the issue but at least it eliminates the terrible  `vpextrb`/`orb` chain. I guess this is due to excessive memcpys again (haven't looked at the llvmir)?

The `TrustedLen` specialization is a drive-by change since I had to do something for the default impl anyway to be able to specialize the `TrustedRandomAccessNoCoerce` impl.

2023-10-15 00:49:21 +00:00

..

fmt

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hash

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iter

optimize zipping over array iterators

2023-10-06 18:33:25 +02:00

net

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num

isqrt: disable long running tests in Miri

2023-09-28 17:43:01 +02:00

ops

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panic

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alloc.rs

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any.rs

core/any: remove Provider trait

2023-08-13 13:07:53 -06:00

array.rs

MIRI -> Miri

2023-10-02 08:35:08 +02:00

ascii.rs

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asserting.rs

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atomic.rs

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bool.rs

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cell.rs

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char.rs

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clone.rs

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cmp.rs

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const_ptr.rs

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convert.rs

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error.rs

core/any: remove Provider trait

2023-08-13 13:07:53 -06:00

future.rs

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intrinsics.rs

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lazy.rs

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lib.rs

Auto merge of #116233 - DaniPopes:stabilize-const_maybe_uninit_assume_init_read, r=dtolnay

2023-10-13 17:11:03 +00:00

macros.rs

Add the cfg_match! macro

2023-09-23 14:23:51 -03:00

manually_drop.rs

Flip cfg's for bootstrap bump

2023-07-12 21:38:55 -04:00

mem.rs

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nonzero.rs

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ops.rs

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option.rs

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panic.rs

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pattern.rs

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pin_macro.rs

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pin.rs

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ptr.rs

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result.rs

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simd.rs

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slice.rs

Auto merge of #112818 - Benjamin-L:add-slice_split_once, r=cuviper

2023-10-11 08:19:13 +00:00

str_lossy.rs

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str.rs

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task.rs

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time.rs

Fix implementation of Duration::checked_div

2023-07-30 04:00:02 -04:00

tuple.rs

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unicode.rs

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waker.rs

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