Forbid old-style simd_shuffleN
intrinsics
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parent
2e6ac7fe5b
commit
4457ef2c6d
16 changed files with 384 additions and 371 deletions
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@ -1020,28 +1020,20 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
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));
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}
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if let Some(stripped) = name.as_str().strip_prefix("simd_shuffle") {
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// If this intrinsic is the older "simd_shuffleN" form, simply parse the integer.
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// If there is no suffix, use the index array length.
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let n: u64 = if stripped.is_empty() {
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// Make sure this is actually an array, since typeck only checks the length-suffixed
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// version of this intrinsic.
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match args[2].layout.ty.kind() {
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ty::Array(ty, len) if matches!(ty.kind(), ty::Uint(ty::UintTy::U32)) => {
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len.try_eval_target_usize(bx.cx.tcx, ty::ParamEnv::reveal_all()).unwrap_or_else(
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|| span_bug!(span, "could not evaluate shuffle index array length"),
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)
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}
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_ => return_error!(InvalidMonomorphization::SimdShuffle {
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span,
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name,
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ty: args[2].layout.ty
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}),
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if name == sym::simd_shuffle {
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// Make sure this is actually an array, since typeck only checks the length-suffixed
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// version of this intrinsic.
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let n: u64 = match args[2].layout.ty.kind() {
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ty::Array(ty, len) if matches!(ty.kind(), ty::Uint(ty::UintTy::U32)) => {
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len.try_eval_target_usize(bx.cx.tcx, ty::ParamEnv::reveal_all()).unwrap_or_else(
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|| span_bug!(span, "could not evaluate shuffle index array length"),
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)
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}
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} else {
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stripped.parse().unwrap_or_else(|_| {
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span_bug!(span, "bad `simd_shuffle` instruction only caught in codegen?")
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})
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_ => return_error!(InvalidMonomorphization::SimdShuffle {
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span,
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name,
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ty: args[2].layout.ty
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}),
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};
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require_simd!(ret_ty, InvalidMonomorphization::SimdReturn { span, name, ty: ret_ty });
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