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spirt_passes/reduce: fix long-standing bug involving chained replacements.

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Eduard-Mihai Burtescu 2023-07-08 04:52:04 +03:00 committed by Eduard-Mihai Burtescu
parent 7f508ba86c
commit b3670b2303
1 changed files with 17 additions and 9 deletions
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26
crates/rustc_codegen_spirv/src/linker/spirt_passes/reduce.rs
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@ -235,15 +235,23 @@ pub(crate) fn reduce_in_func(cx: &Context, func_def_body: &mut FuncDefBody) {
break; break;
} }
func_def_body.inner_in_place_transform_with(&mut ReplaceValueWith(|v| match v { func_def_body.inner_in_place_transform_with(&mut ReplaceValueWith(|mut v| {
Value::Const(_) => None, let old = v;
_ => value_replacements loop {
.get(&HashableValue(v)) match v {
.copied() Value::Const(_) => break,
.map(|new| { _ => match value_replacements.get(&HashableValue(v)) {
any_changes = true; Some(&new) => v = new,
new None => break,
}), },
}
}
if v != old {
any_changes = true;
Some(v)
} else {
None
}
})); }));
} }
} }