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squashing bugs

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This commit is contained in:
Vern Paxson 2023-11-29 17:21:35 -08:00
parent 71364bd112
commit d27ed0eb7a
5 changed files with 93 additions and 90 deletions
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32
src/script_opt/Reduce.h
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@ -131,24 +131,22 @@ public:
replaced_stmts.clear();
}
// Given the LHS and RHS of an assignment, returns true
// if the RHS is a common subexpression (meaning that the
// current assignment statement should be deleted). In
// that case, has the side effect of associating an alias
// for the LHS with the temporary variable that holds the
// equivalent RHS; or if the LHS is a local that has no other
// assignments, and the same for the RHS.
// Given the LHS and RHS of an assignment, returns true if the RHS is
// a common subexpression (meaning that the current assignment statement
// should be deleted). In that case, has the side effect of associating
// an alias for the LHS with the temporary variable that holds the
// equivalent RHS; or if the LHS is a local that has no other assignments,
// and the same for the RHS.
//
// Assumes reduction (including alias propagation) has
// already been applied.
// Assumes reduction (including alias propagation) has already been applied.
bool IsCSE(const AssignExpr* a, const NameExpr* lhs, const Expr* rhs);
// Returns a constant representing folding of the given expression
// (which must have constant operands).
ConstExprPtr Fold(ExprPtr e);
// Notes that the given expression has been folded to the
// given constant.
// Notes that the given expression has been folded to the given constant.
void FoldedTo(ExprPtr orig, ConstExprPtr c);
// Given an lhs=rhs statement followed by succ_stmt, returns
@ -348,12 +346,14 @@ protected:
// the LHS is in conflict with the identifiers we're tracking.
bool CheckID(const ID* id, bool ignore_orig) const;
// Returns true if the assignment given by 'e' modifies an aggregate
// with the same type as that of one of the identifiers we're tracking.
// ###
bool CheckAggrMod(const Expr* e) const;
// Returns true if a modification to an aggregate of the given type
// potentially aliases with one of the identifiers we're tracking.
bool CheckAggrMod(const TypePtr& t) const;
bool CheckTableRef(const Expr* e) const;
// About elements ...
// ###
bool CheckTableMod(const TypePtr& t) const;
bool CheckTableRef(const TypePtr& t) const;
// Profile across all script functions.
ProfileFuncs& pfs;