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Rollup of 6 pull requests #133684

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merged 14 commits into from
Nov 30, 2024
Merged

Rollup of 6 pull requests #133684

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9b6dfdd
Mark visionOS as supporting `std`
madsmtm Nov 28, 2024
c5abbb3
Eliminate rustc_ast_pretty's print_expr_maybe_paren
dtolnay Nov 28, 2024
9453803
Eliminate rustc_hir_pretty's print_expr_maybe_paren
dtolnay Nov 28, 2024
92a1a1d
Remove unused code
sunwxg Nov 30, 2024
67a29ac
bump hashbrown version
RalfJung Nov 30, 2024
fd90198
replace hard coded error id with `ErrorKind::DirectoryNotEmpty`
onur-ozkan Nov 30, 2024
97b84e4
add tests for niches in pointers
the8472 Nov 30, 2024
26d7b5d
use stores of the correct size to set discriminants
the8472 Oct 13, 2024
3029e09
Rollup merge of #131698 - the8472:remove-set-discriminant-hack, r=Ral…
RalfJung Nov 30, 2024
2aee158
Rollup merge of #133571 - madsmtm:visionos-support-std, r=Noratrieb
RalfJung Nov 30, 2024
78fecaa
Rollup merge of #133655 - dtolnay:maybeparen, r=lcnr
RalfJung Nov 30, 2024
35e92ae
Rollup merge of #133667 - sunwxg:xiaoguang/remove-unused-code, r=club…
RalfJung Nov 30, 2024
ec000a7
Rollup merge of #133670 - RalfJung:hashbrown, r=Amanieu
RalfJung Nov 30, 2024
bdb44d0
Rollup merge of #133673 - onur-ozkan:windows-fixme, r=Kobzol
RalfJung Nov 30, 2024
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118 changes: 87 additions & 31 deletions compiler/rustc_ast_pretty/src/pprust/state/expr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -58,10 +58,6 @@ impl<'a> State<'a> {
self.pclose()
}

fn print_expr_maybe_paren(&mut self, expr: &ast::Expr, prec: i8, fixup: FixupContext) {
self.print_expr_cond_paren(expr, expr.precedence() < prec, fixup);
}

/// Prints an expr using syntax that's acceptable in a condition position, such as the `cond` in
/// `if cond { ... }`.
fn print_expr_as_cond(&mut self, expr: &ast::Expr) {
Expand Down Expand Up @@ -237,7 +233,7 @@ impl<'a> State<'a> {
// because the latter is valid syntax but with the incorrect meaning.
// It's a match-expression followed by tuple-expression, not a function
// call.
self.print_expr_maybe_paren(func, prec, fixup.leftmost_subexpression());
self.print_expr_cond_paren(func, func.precedence() < prec, fixup.leftmost_subexpression());

self.print_call_post(args)
}
Expand All @@ -258,7 +254,11 @@ impl<'a> State<'a> {
// boundaries, `$receiver.method()` can be parsed back as a statement
// containing an expression if and only if `$receiver` can be parsed as
// a statement containing an expression.
self.print_expr_maybe_paren(receiver, parser::PREC_UNAMBIGUOUS, fixup);
self.print_expr_cond_paren(
receiver,
receiver.precedence() < parser::PREC_UNAMBIGUOUS,
fixup,
);

self.word(".");
self.print_ident(segment.ident);
Expand Down Expand Up @@ -306,17 +306,29 @@ impl<'a> State<'a> {
_ => left_prec,
};

self.print_expr_maybe_paren(lhs, left_prec, fixup.leftmost_subexpression());
self.print_expr_cond_paren(
lhs,
lhs.precedence() < left_prec,
fixup.leftmost_subexpression(),
);

self.space();
self.word_space(op.node.as_str());

self.print_expr_maybe_paren(rhs, right_prec, fixup.subsequent_subexpression());
self.print_expr_cond_paren(
rhs,
rhs.precedence() < right_prec,
fixup.subsequent_subexpression(),
);
}

fn print_expr_unary(&mut self, op: ast::UnOp, expr: &ast::Expr, fixup: FixupContext) {
self.word(op.as_str());
self.print_expr_maybe_paren(expr, parser::PREC_PREFIX, fixup.subsequent_subexpression());
self.print_expr_cond_paren(
expr,
expr.precedence() < parser::PREC_PREFIX,
fixup.subsequent_subexpression(),
);
}

fn print_expr_addr_of(
Expand All @@ -334,7 +346,11 @@ impl<'a> State<'a> {
self.print_mutability(mutability, true);
}
}
self.print_expr_maybe_paren(expr, parser::PREC_PREFIX, fixup.subsequent_subexpression());
self.print_expr_cond_paren(
expr,
expr.precedence() < parser::PREC_PREFIX,
fixup.subsequent_subexpression(),
);
}

pub(super) fn print_expr(&mut self, expr: &ast::Expr, fixup: FixupContext) {
Expand Down Expand Up @@ -417,7 +433,11 @@ impl<'a> State<'a> {
}
ast::ExprKind::Cast(expr, ty) => {
let prec = AssocOp::As.precedence() as i8;
self.print_expr_maybe_paren(expr, prec, fixup.leftmost_subexpression());
self.print_expr_cond_paren(
expr,
expr.precedence() < prec,
fixup.leftmost_subexpression(),
);
self.space();
self.word_space("as");
self.print_type(ty);
Expand Down Expand Up @@ -490,7 +510,11 @@ impl<'a> State<'a> {
self.space();
}
MatchKind::Postfix => {
self.print_expr_maybe_paren(expr, parser::PREC_UNAMBIGUOUS, fixup);
self.print_expr_cond_paren(
expr,
expr.precedence() < parser::PREC_UNAMBIGUOUS,
fixup,
);
self.word_nbsp(".match");
}
}
Expand Down Expand Up @@ -550,33 +574,57 @@ impl<'a> State<'a> {
self.print_block_with_attrs(blk, attrs);
}
ast::ExprKind::Await(expr, _) => {
self.print_expr_maybe_paren(expr, parser::PREC_UNAMBIGUOUS, fixup);
self.print_expr_cond_paren(
expr,
expr.precedence() < parser::PREC_UNAMBIGUOUS,
fixup,
);
self.word(".await");
}
ast::ExprKind::Assign(lhs, rhs, _) => {
let prec = AssocOp::Assign.precedence() as i8;
self.print_expr_maybe_paren(lhs, prec + 1, fixup.leftmost_subexpression());
self.print_expr_cond_paren(
lhs,
lhs.precedence() <= prec,
fixup.leftmost_subexpression(),
);
self.space();
self.word_space("=");
self.print_expr_maybe_paren(rhs, prec, fixup.subsequent_subexpression());
self.print_expr_cond_paren(
rhs,
rhs.precedence() < prec,
fixup.subsequent_subexpression(),
);
}
ast::ExprKind::AssignOp(op, lhs, rhs) => {
let prec = AssocOp::Assign.precedence() as i8;
self.print_expr_maybe_paren(lhs, prec + 1, fixup.leftmost_subexpression());
self.print_expr_cond_paren(
lhs,
lhs.precedence() <= prec,
fixup.leftmost_subexpression(),
);
self.space();
self.word(op.node.as_str());
self.word_space("=");
self.print_expr_maybe_paren(rhs, prec, fixup.subsequent_subexpression());
self.print_expr_cond_paren(
rhs,
rhs.precedence() < prec,
fixup.subsequent_subexpression(),
);
}
ast::ExprKind::Field(expr, ident) => {
self.print_expr_maybe_paren(expr, parser::PREC_UNAMBIGUOUS, fixup);
self.print_expr_cond_paren(
expr,
expr.precedence() < parser::PREC_UNAMBIGUOUS,
fixup,
);
self.word(".");
self.print_ident(*ident);
}
ast::ExprKind::Index(expr, index, _) => {
self.print_expr_maybe_paren(
self.print_expr_cond_paren(
expr,
parser::PREC_UNAMBIGUOUS,
expr.precedence() < parser::PREC_UNAMBIGUOUS,
fixup.leftmost_subexpression(),
);
self.word("[");
Expand All @@ -590,14 +638,22 @@ impl<'a> State<'a> {
// a "normal" binop gets parenthesized. (`LOr` is the lowest-precedence binop.)
let fake_prec = AssocOp::LOr.precedence() as i8;
if let Some(e) = start {
self.print_expr_maybe_paren(e, fake_prec, fixup.leftmost_subexpression());
self.print_expr_cond_paren(
e,
e.precedence() < fake_prec,
fixup.leftmost_subexpression(),
);
}
match limits {
ast::RangeLimits::HalfOpen => self.word(".."),
ast::RangeLimits::Closed => self.word("..="),
}
if let Some(e) = end {
self.print_expr_maybe_paren(e, fake_prec, fixup.subsequent_subexpression());
self.print_expr_cond_paren(
e,
e.precedence() < fake_prec,
fixup.subsequent_subexpression(),
);
}
}
ast::ExprKind::Underscore => self.word("_"),
Expand Down Expand Up @@ -632,9 +688,9 @@ impl<'a> State<'a> {
self.word("return");
if let Some(expr) = result {
self.word(" ");
self.print_expr_maybe_paren(
self.print_expr_cond_paren(
expr,
parser::PREC_JUMP,
expr.precedence() < parser::PREC_JUMP,
fixup.subsequent_subexpression(),
);
}
Expand All @@ -645,19 +701,19 @@ impl<'a> State<'a> {
self.word("yeet");
if let Some(expr) = result {
self.word(" ");
self.print_expr_maybe_paren(
self.print_expr_cond_paren(
expr,
parser::PREC_JUMP,
expr.precedence() < parser::PREC_JUMP,
fixup.subsequent_subexpression(),
);
}
}
ast::ExprKind::Become(result) => {
self.word("become");
self.word(" ");
self.print_expr_maybe_paren(
self.print_expr_cond_paren(
result,
parser::PREC_JUMP,
result.precedence() < parser::PREC_JUMP,
fixup.subsequent_subexpression(),
);
}
Expand Down Expand Up @@ -709,15 +765,15 @@ impl<'a> State<'a> {

if let Some(expr) = e {
self.space();
self.print_expr_maybe_paren(
self.print_expr_cond_paren(
expr,
parser::PREC_JUMP,
expr.precedence() < parser::PREC_JUMP,
fixup.subsequent_subexpression(),
);
}
}
ast::ExprKind::Try(e) => {
self.print_expr_maybe_paren(e, parser::PREC_UNAMBIGUOUS, fixup);
self.print_expr_cond_paren(e, e.precedence() < parser::PREC_UNAMBIGUOUS, fixup);
self.word("?")
}
ast::ExprKind::TryBlock(blk) => {
Expand Down
24 changes: 16 additions & 8 deletions compiler/rustc_codegen_ssa/src/mir/place.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
use rustc_abi::Primitive::{Int, Pointer};
use rustc_abi::{Align, FieldsShape, Size, TagEncoding, VariantIdx, Variants};
use rustc_abi::{Align, BackendRepr, FieldsShape, Size, TagEncoding, VariantIdx, Variants};
use rustc_middle::mir::interpret::Scalar;
use rustc_middle::mir::tcx::PlaceTy;
use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, TyAndLayout};
use rustc_middle::ty::{self, Ty};
Expand Down Expand Up @@ -385,15 +386,22 @@ impl<'a, 'tcx, V: CodegenObject> PlaceRef<'tcx, V> {
if variant_index != untagged_variant {
let niche = self.project_field(bx, tag_field);
let niche_llty = bx.cx().immediate_backend_type(niche.layout);
let BackendRepr::Scalar(scalar) = niche.layout.backend_repr else {
bug!("expected a scalar placeref for the niche");
};
// We are supposed to compute `niche_value.wrapping_add(niche_start)` wrapping
// around the `niche`'s type.
// The easiest way to do that is to do wrapping arithmetic on `u128` and then
// masking off any extra bits that occur because we did the arithmetic with too many bits.
let niche_value = variant_index.as_u32() - niche_variants.start().as_u32();
let niche_value = (niche_value as u128).wrapping_add(niche_start);
// FIXME(eddyb): check the actual primitive type here.
let niche_llval = if niche_value == 0 {
// HACK(eddyb): using `c_null` as it works on all types.
bx.cx().const_null(niche_llty)
} else {
bx.cx().const_uint_big(niche_llty, niche_value)
};
let niche_value = niche_value & niche.layout.size.unsigned_int_max();

let niche_llval = bx.cx().scalar_to_backend(
Scalar::from_uint(niche_value, niche.layout.size),
scalar,
niche_llty,
);
OperandValue::Immediate(niche_llval).store(bx, niche);
}
}
Expand Down
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