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Improve integer interning in default_configuration.

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We have `sym::integer` for interning integers. Using it lets us use
symbols directy, and not have to explicitly go through strings.
This commit is contained in:
Nicholas Nethercote 2023-11-29 13:45:50 +11:00
parent dba94164e9
commit 24d4fe4cd9
1 changed files with 9 additions and 10 deletions
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19
compiler/rustc_session/src/config.rs
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@ -1246,7 +1246,7 @@ fn default_configuration(sess: &Session) -> Cfg {
// NOTE: This should be kept in sync with `CheckCfg::fill_well_known` below.
let end = &sess.target.endian;
let arch = &sess.target.arch;
let wordsz = sess.target.pointer_width.to_string();
let wordsz = sess.target.pointer_width as u64;
let os = &sess.target.os;
let env = &sess.target.env;
let abi = &sess.target.abi;
@ -1273,7 +1273,7 @@ fn default_configuration(sess: &Session) -> Cfg {
}
ret.insert((sym::target_arch, Some(Symbol::intern(arch))));
ret.insert((sym::target_endian, Some(Symbol::intern(end.as_str()))));
ret.insert((sym::target_pointer_width, Some(Symbol::intern(&wordsz))));
ret.insert((sym::target_pointer_width, Some(sym::integer(wordsz))));
ret.insert((sym::target_env, Some(Symbol::intern(env))));
ret.insert((sym::target_abi, Some(Symbol::intern(abi))));
if sess.is_nightly_build() {
@ -1293,19 +1293,18 @@ fn default_configuration(sess: &Session) -> Cfg {
] {
if i >= min_atomic_width && i <= max_atomic_width {
has_atomic = true;
let mut insert_atomic = |s, align: Align| {
ret.insert((sym::target_has_atomic_load_store, Some(Symbol::intern(s))));
let mut insert_atomic = |sym, align: Align| {
ret.insert((sym::target_has_atomic_load_store, Some(sym)));
if atomic_cas {
ret.insert((sym::target_has_atomic, Some(Symbol::intern(s))));
ret.insert((sym::target_has_atomic, Some(sym)));
}
if align.bits() == i {
ret.insert((sym::target_has_atomic_equal_alignment, Some(Symbol::intern(s))));
ret.insert((sym::target_has_atomic_equal_alignment, Some(sym)));
}
};
let s = i.to_string();
insert_atomic(&s, align);
if s == wordsz {
insert_atomic("ptr", layout.pointer_align.abi);
insert_atomic(sym::integer(i), align);
if wordsz == i {
insert_atomic(sym::ptr, layout.pointer_align.abi);
}
}
}