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Auto merge of #121728 - tgross35:f16-f128-step1-ty-updates, r=compiler-errors

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Add stubs in IR and ABI for `f16` and `f128`

This is the very first step toward the changes in https://github.com/rust-lang/rust/pull/114607 and the [`f16` and `f128` RFC](https://rust-lang.github.io/rfcs/3453-f16-and-f128.html). It adds the types to `rustc_type_ir::FloatTy` and `rustc_abi::Primitive`, and just propagates those out as `unimplemented!` stubs where necessary.

These types do not parse yet so there is no feature gate, and it should be okay to use `unimplemented!`.

The next steps will probably be AST support with parsing and the feature gate.

r? `@compiler-errors`
cc `@Nilstrieb` suggested breaking the PR up in https://github.com/rust-lang/rust/pull/120645#issuecomment-1925900572
This commit is contained in:
bors 2024-03-01 03:36:11 +00:00
commit fb18033b83
2 changed files with 6 additions and 0 deletions
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4
clippy_lints/src/float_literal.rs
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@ -81,6 +81,7 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
LitFloatType::Unsuffixed => None,
};
let (is_whole, is_inf, mut float_str) = match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F32 => {
let value = sym_str.parse::<f32>().unwrap();
@ -91,6 +92,7 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
(value.fract() == 0.0, value.is_infinite(), formatter.format(value))
},
FloatTy::F128 => unimplemented!("f16_f128"),
};
if is_inf {
@ -135,8 +137,10 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
#[must_use]
fn max_digits(fty: FloatTy) -> u32 {
match fty {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F32 => f32::DIGITS,
FloatTy::F64 => f64::DIGITS,
FloatTy::F128 => unimplemented!("f16_f128"),
}
}

2
clippy_utils/src/consts.rs
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@ -778,8 +778,10 @@ pub fn mir_to_const<'tcx>(lcx: &LateContext<'tcx>, result: mir::Const<'tcx>) ->
let range = alloc_range(offset + size * idx, size);
let val = alloc.read_scalar(&lcx.tcx, range, /* read_provenance */ false).ok()?;
res.push(match flt {
FloatTy::F16 => unimplemented!("f16_f128"),
FloatTy::F32 => Constant::F32(f32::from_bits(val.to_u32().ok()?)),
FloatTy::F64 => Constant::F64(f64::from_bits(val.to_u64().ok()?)),
FloatTy::F128 => unimplemented!("f16_f128"),
});
}
Some(Constant::Vec(res))