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Simplify subtractions with ptr #197

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Aug 27, 2024
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Simplify subtractions with ptr #197

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2 changes: 2 additions & 0 deletions src/expr.ml
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Original file line number Diff line number Diff line change
Expand Up @@ -288,6 +288,8 @@ let rec binop ty (op : binop) (hte1 : t) (hte2 : t) : t =
binop ty Rem addr hte2
| Add, _, Ptr { base; offset } ->
ptr base (binop (Ty_bitv 32) Add offset hte1)
| Sub, _, Ptr { base; offset } ->
binop ty Sub hte1 (binop (Ty_bitv 32) Add (value (Num (I32 base))) offset)
| (Add | Or), Val (Num (I32 0l)), _ -> hte2
| (And | Div | DivU | Mul | Rem | RemU), Val (Num (I32 0l)), _ -> hte1
| (Add | Or), _, Val (Num (I32 0l)) -> hte1
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