Cool_Tools/bemaniutils
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mirror of synced 2024-09-24 03:18:22 +02:00
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Fix detection of some compound or statements with no false path.

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This commit is contained in:
Jennifer Taylor 2021-07-15 00:13:25 +00:00
parent 599825332a
commit 5ebb0a3524
1 changed files with 19 additions and 15 deletions
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34
bemani/format/afp/decompile.py
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@ -3287,7 +3287,7 @@ class ByteCodeDecompiler(VerboseOutput):
true_cond = AndIf(conditional, candidate_true_expr).simplify()
false_cond = AndIf(conditional, candidate_false_expr).simplify()
if true_cond in paths and false_cond in paths:
if false_cond in paths:
if len(candidate_statements) < 2:
return None
else:
@ -3348,8 +3348,15 @@ class ByteCodeDecompiler(VerboseOutput):
true_statements = []
false_statements = []
hit_after = False
for stmt in candidate_statements[-1].true_statements:
if stmt_to_flow[stmt] == parent_conditional:
if isinstance(stmt, DefineLabelStatement):
hit_after = True
# We know that this is going to have a jump into it at some point.
# So, gather everything until the jump as the true statements, and
# everything after the jump as the hoisted statements.
if hit_after:
hoist_after.append(stmt)
else:
true_statements.append(stmt)
@ -3359,21 +3366,18 @@ class ByteCodeDecompiler(VerboseOutput):
i += 1
while i < len(statements):
statement = statements[i]
if stmt_to_flow[statement] == false_cond:
if stmt_to_flow[statement] == parent_conditional:
# In some alternate cases, this can be a label that is jumped to
# by the true case. This should only happen if we never ran into
# a hoisted after statement above.
if hit_after:
raise Exception("Logic error!")
break
false_statements.append(statement)
# Thigs get a little complicated here, on account of the fact that
# we might have scooped up an internal compound or. If that's the
# case, we need to grab its own else clause too.
if isinstance(statement, IfStatement):
# See if this is a compound if pattern.
new_candidate_statements = get_candidate_group(false_cond, statement)
if new_candidate_statements is not None:
false_cond = AndIf(false_cond, get_compound_if(new_candidate_statements).invert()).simplify()
i += 1
else:
# We don't need to include this statement.
if isinstance(statement, (NullReturnStatement, ReturnStatement, ThrowStatement, GotoStatement)):
break
# Now, add this new if statement, but make sure to gather up