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Chris Fallin 2022-11-29 18:40:57 -08:00
parent 2ec2de1dfc
commit 4e3fb51aa9
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GPG key ID: 31649E4FE65EB465
1 changed files with 13 additions and 4 deletions
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17
src/frontend.rs
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@ -621,6 +621,7 @@ enum Frame {
params: Vec<Type>,
results: Vec<Type>,
head_reachable: bool,
merge_reachable: bool,
},
Else {
start_depth: usize,
@ -688,6 +689,12 @@ impl Frame {
fn set_reachable(&mut self) {
match self {
Frame::Block { out_reachable, .. } => *out_reachable = true,
Frame::If {
merge_reachable, ..
}
| Frame::Else {
merge_reachable, ..
} => *merge_reachable = true,
_ => {}
}
}
@ -1027,6 +1034,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
term_targets.push(block);
}
self.emit_br_table(index, default_term_target, &term_targets[..], &args[..]);
self.reachable = false;
}
wasmparser::Operator::Return => {
@ -1123,6 +1131,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
ref param_values,
ref results,
head_reachable,
merge_reachable,
..
}) => {
// Generate a branch to the out-block with
@ -1151,7 +1160,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
assert_eq!(self.op_stack.len(), *start_depth);
}
self.cur_block = *out;
self.reachable = *head_reachable || self.reachable;
self.reachable = *head_reachable || self.reachable || *merge_reachable;
self.locals.seal_block_preds(*out, &mut self.body);
self.locals.start_block(*out, was_reachable);
self.push_block_params(results.len());
@ -1253,6 +1262,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
params,
results,
head_reachable: self.reachable,
merge_reachable: false,
});
self.emit_cond_branch(cond, if_true, &[], if_false, &[]);
self.locals.seal_block_preds(if_true, &mut self.body);
@ -1270,6 +1280,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
params,
results,
head_reachable,
merge_reachable,
} = self.ctrl_stack.pop().unwrap()
{
if self.reachable {
@ -1284,7 +1295,7 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
out,
params,
results,
merge_reachable: head_reachable,
merge_reachable,
});
self.cur_block = el;
self.locals.start_block(el, self.reachable);
@ -1380,7 +1391,6 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
},
},
);
self.reachable = false;
self.locals.finish_block(true);
}
}
@ -1425,7 +1435,6 @@ impl<'a, 'b> FunctionBodyBuilder<'a, 'b> {
},
);
self.locals.finish_block(true);
self.reachable = false;
}
}