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print-type-sizes: skip field printing for primitives

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This commit is contained in:
Tomasz Miąsko 2021-09-28 00:00:00 +00:00
parent 1d71ba8623
commit 25b6f9b68b
3 changed files with 7 additions and 3 deletions
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7
compiler/rustc_middle/src/ty/layout.rs
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@ -1805,8 +1805,11 @@ fn record_layout_for_printing_outlined(&self, layout: TyAndLayout<'tcx>) {
match layout.variants { match layout.variants {
Variants::Single { index } => { Variants::Single { index } => {
debug!("print-type-size `{:#?}` variant {}", layout, adt_def.variants[index].ident); if !adt_def.variants.is_empty() && layout.fields != FieldsShape::Primitive {
if !adt_def.variants.is_empty() { debug!(
"print-type-size `{:#?}` variant {}",
layout, adt_def.variants[index].ident
);
let variant_def = &adt_def.variants[index]; let variant_def = &adt_def.variants[index];
let fields: Vec<_> = variant_def.fields.iter().map(|f| f.ident.name).collect(); let fields: Vec<_> = variant_def.fields.iter().map(|f| f.ident.name).collect();
record( record(

2
src/test/ui/print_type_sizes/uninhabited.rs
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@ -11,5 +11,5 @@
fn start(_: isize, _: *const *const u8) -> isize { fn start(_: isize, _: *const *const u8) -> isize {
let _x: Option<!> = None; let _x: Option<!> = None;
let _y: Result<u32, !> = Ok(42); let _y: Result<u32, !> = Ok(42);
0 let _z: Result<!, !> = loop {};
} }

1
src/test/ui/print_type_sizes/uninhabited.stdout
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@ -3,3 +3,4 @@ print-type-size variant `Ok`: 4 bytes
print-type-size field `.0`: 4 bytes print-type-size field `.0`: 4 bytes
print-type-size type: `std::option::Option<!>`: 0 bytes, alignment: 1 bytes print-type-size type: `std::option::Option<!>`: 0 bytes, alignment: 1 bytes
print-type-size variant `None`: 0 bytes print-type-size variant `None`: 0 bytes
print-type-size type: `std::result::Result<!, !>`: 0 bytes, alignment: 1 bytes