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Avoid moving labels in a block #202

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Merged
sipma merged 1 commit into from
Mar 12, 2025
Merged

Avoid moving labels in a block #202

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16 changes: 9 additions & 7 deletions chb/ast/ASTSerializer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -333,17 +333,19 @@ def is_empty_instr_sequence(s: AST.ASTStmt) -> bool:
return False
return len(cast(AST.ASTInstrSequence, s).instructions) == 0

# Make sure we don't drop labels from empty instr sequences.
for s in stmt.stmts:
if is_empty_instr_sequence(s):
labels.extend(s.labels)

if len(labels) > 0:
node["labelcount"] = len(labels)
for label in labels:
args.append(label.index(self))
args.extend(s.index(self) for s in stmt.stmts
if not is_empty_instr_sequence(s))

for s in stmt.stmts:
if is_empty_instr_sequence(s):
# Make sure we don't drop labels from empty instr sequences.
for label in s.labels:
args.append(label.index(self))
else:
args.append(s.index(self))

return self.add(tags, args, node)

def index_loop_stmt(self, stmt: AST.ASTLoop) -> int:
Expand Down