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add bv-size reduce #6137

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- add option smt.bv.reduce_size.
  - it allows to apply incremental pre-processing of bit-vectors by identifying ranges that are known to be constant.
    This rewrite is beneficial, for instance, when bit-vectors are constrained to have many high-level bits set to 0.
This commit is contained in:
Nikolaj Bjorner 2022-08-16 16:35:14 -07:00
parent 45a4b810de
commit 48b13291d1
8 changed files with 78 additions and 0 deletions
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5
src/ast/rewriter/expr_safe_replace.h
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@ -28,6 +28,7 @@ class expr_safe_replace {
ast_manager& m;
expr_ref_vector m_src;
expr_ref_vector m_dst;
unsigned_vector m_limit = 0;
ptr_vector<expr> m_todo, m_args;
expr_ref_vector m_refs;
std::unordered_map<expr*,expr*> m_cache;
@ -48,5 +49,9 @@ public:
void reset();
bool empty() const { return m_src.empty(); }
void push_scope();
void pop_scope(unsigned n);
};