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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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17
compiler/rustc_target/src/spec/mod.rs
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@ -3396,19 +3396,22 @@ impl Hash for TargetTriple {
impl<S: Encoder> Encodable<S> for TargetTriple {
fn encode(&self, s: &mut S) {
match self {
TargetTriple::TargetTriple(triple) => s.emit_enum_variant(0, |s| s.emit_str(triple)),
TargetTriple::TargetJson { path_for_rustdoc: _, triple, contents } => s
.emit_enum_variant(1, |s| {
s.emit_str(triple);
s.emit_str(contents)
}),
TargetTriple::TargetTriple(triple) => {
s.emit_u8(0);
s.emit_str(triple);
}
TargetTriple::TargetJson { path_for_rustdoc: _, triple, contents } => {
s.emit_u8(1);
s.emit_str(triple);
s.emit_str(contents);
}
}
}
}
impl<D: Decoder> Decodable<D> for TargetTriple {
fn decode(d: &mut D) -> Self {
match d.read_usize() {
match d.read_u8() {
0 => TargetTriple::TargetTriple(d.read_str().to_owned()),
1 => TargetTriple::TargetJson {
path_for_rustdoc: PathBuf::new(),