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Remove more needless leb128 coding for enum variants

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This removes emit_enum_variant and the emit_usize calls that resulted
in. In libcore this eliminates 17% of leb128, taking us from 8964488 to
7383842 leb128's serialized.
This commit is contained in:
Mark Rousskov 2024-01-09 19:51:18 -05:00
parent 5e8f67bbc9
commit 1d2005be71
3 changed files with 36 additions and 35 deletions
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21
compiler/rustc_span/src/lib.rs
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@ -203,18 +203,19 @@ impl Hash for RealFileName {
impl<S: Encoder> Encodable<S> for RealFileName {
fn encode(&self, encoder: &mut S) {
match *self {
RealFileName::LocalPath(ref local_path) => encoder.emit_enum_variant(0, |encoder| {
RealFileName::LocalPath(ref local_path) => {
encoder.emit_u8(0);
local_path.encode(encoder);
}),
}
RealFileName::Remapped { ref local_path, ref virtual_name } => encoder
.emit_enum_variant(1, |encoder| {
// For privacy and build reproducibility, we must not embed host-dependant path
// in artifacts if they have been remapped by --remap-path-prefix
assert!(local_path.is_none());
local_path.encode(encoder);
virtual_name.encode(encoder);
}),
RealFileName::Remapped { ref local_path, ref virtual_name } => {
encoder.emit_u8(1);
// For privacy and build reproducibility, we must not embed host-dependant path
// in artifacts if they have been remapped by --remap-path-prefix
assert!(local_path.is_none());
local_path.encode(encoder);
virtual_name.encode(encoder);
}
}
}
}