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Rollup merge of #98441 - calebzulawski:simd_as, r=oli-obk

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Implement simd_as for pointers

Expands `simd_as` (and `simd_cast`) to handle pointer-to-pointer, pointer-to-integer, and integer-to-pointer conversions.

cc ``@programmerjake`` ``@thomcc``
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Dylan DPC 2022-09-17 15:31:07 +05:30 • committed by GitHub
commit cbd561d41f
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4 changed files with 132 additions and 1 deletions
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6
compiler/rustc_typeck/src/check/intrinsic.rs
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@ -477,7 +477,11 @@ pub fn check_platform_intrinsic_type(tcx: TyCtxt<'_>, it: &hir::ForeignItem<'_>)
sym::simd_scatter => (3, vec![param(0), param(1), param(2)], tcx.mk_unit()),
sym::simd_insert => (2, vec![param(0), tcx.types.u32, param(1)], param(0)),
sym::simd_extract => (2, vec![param(0), tcx.types.u32], param(1)),
sym::simd_cast | sym::simd_as => (2, vec![param(0)], param(1)),
sym::simd_cast
| sym::simd_as
| sym::simd_cast_ptr
| sym::simd_expose_addr
| sym::simd_from_exposed_addr => (2, vec![param(0)], param(1)),
sym::simd_bitmask => (2, vec![param(0)], param(1)),
sym::simd_select | sym::simd_select_bitmask => {
(2, vec![param(0), param(1), param(1)], param(1))