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https://github.com/Z3Prover/z3
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66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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bv_slice_tactic.h
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Abstract:
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Tactic for simplifying with bit-vector slices
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Author:
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Nikolaj Bjorner (nbjorner) 2022-10-30
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Tactic Documentation
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## Tactic bv-slice
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### Short Description
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Slices bit-vectors into sub-ranges to allow simplifying sub-ranges.
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### Long Description
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It rewrites a state using bit-vector slices.
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Slices are extracted from bit-vector equality assertions.
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An equality assertion may equate a sub-range of a bit-vector
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with a constant. The tactic ensures that all occurrences of the
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subrange are replaced by the constants to allow additional
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simplification
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### Example
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```z3 ignore-errors
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(declare-const x (_ BitVec 32))
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(declare-const y (_ BitVec 32))
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(assert (= ((_ extract 31 16) x) (_ bv123 16)))
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(assert (= ((_ extract 15 0) x) ((_ extract 16 1) y)))
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(assert (= (bvadd x x) y))
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(apply bv-slice)
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```
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--*/
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#pragma once
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#include "util/params.h"
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#include "tactic/tactic.h"
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#include "tactic/dependent_expr_state_tactic.h"
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#include "ast/simplifiers/bv_slice.h"
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class ast_manager;
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class tactic;
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inline tactic* mk_bv_slice_tactic(ast_manager& m, params_ref const& p = params_ref()) {
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return alloc(dependent_expr_state_tactic, m, p,
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[](auto& m, auto& p, auto &s) -> dependent_expr_simplifier* { return alloc(bv::slice, m, s); });
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}
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/*
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ADD_TACTIC("bv-slice", "simplify using bit-vector slices.", "mk_bv_slice_tactic(m, p)")
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ADD_SIMPLIFIER("bv-slice", "simplify using bit-vector slices.", "alloc(bv::slice, m, s)")
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*/
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