diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/passes/Vacuum.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/passes/Vacuum.cpp b/src/passes/Vacuum.cpp index 4e47ad9a3..64c7f276a 100644 --- a/src/passes/Vacuum.cpp +++ b/src/passes/Vacuum.cpp @@ -49,6 +49,8 @@ struct Vacuum : public WalkerPass<PostWalker<Vacuum>> { // returns nullptr if curr is dead, curr if it must stay as is, or another node if it can be replaced Expression* optimize(Expression* curr, bool resultUsed) { + // an unreachable node must not be changed + if (curr->type == unreachable) return curr; while (1) { switch (curr->_id) { case Expression::Id::NopId: return nullptr; // never needed |