Auto merge of #143833 - scottmcm:final-mcp-838, r=compiler-errors

Ban projecting into SIMD types [MCP838]

Closes https://github.com/rust-lang/compiler-team/issues/838

The actual compiler change here is tiny; there's just a bazillion tests to update.

~~Since I'm sure I've missed some, for now~~
~~r ghost~~

try-job: test-various
try-job: x86_64-gnu-nopt

1 files changed, 4 insertions, 8 deletions

diff --git a/tests/codegen/simd/packed-simd.rs b/tests/codegen/simd/packed-simd.rs
index 73e0d29d7d6..70c03fcc955 100644
--- a/tests/codegen/simd/packed-simd.rs
+++ b/tests/codegen/simd/packed-simd.rs
@@ -9,18 +9,14 @@
 use core::intrinsics::simd as intrinsics;
 use core::{mem, ptr};
 
+#[path = "../../auxiliary/minisimd.rs"]
+mod minisimd;
+use minisimd::{PackedSimd, Simd as FullSimd};
+
 // Test codegen for not only "packed" but also "fully aligned" SIMD types, and conversion between
 // them. A repr(packed,simd) type with 3 elements can't exceed its element alignment, whereas the
 // same type as repr(simd) will instead have padding.
 
-#[repr(simd, packed)]
-#[derive(Copy, Clone)]
-pub struct PackedSimd<T, const N: usize>([T; N]);
-
-#[repr(simd)]
-#[derive(Copy, Clone)]
-pub struct FullSimd<T, const N: usize>([T; N]);
-
 // non-powers-of-two have padding and need to be expanded to full vectors
 fn load<T, const N: usize>(v: PackedSimd<T, N>) -> FullSimd<T, N> {
     unsafe {