https://gcc.gnu.org/g:95fce0dc73002d5c9557fa7260c7ba1e761136ff
commit r15-151-g95fce0dc73002d5c9557fa7260c7ba1e761136ff
Author: Aldy Hernandez <al...@redhat.com>
Date: Wed Mar 20 08:04:32 2024 +0100
Implement operator_cast for prange.
gcc/ChangeLog:
* range-op-mixed.h: Add overloaded declarations for pointer
variants.
* range-op-ptr.cc (operator_cast::fold_range): New.
(operator_cast::op1_range): New.
(operator_cast::lhs_op1_relation): New.
(operator_cast::pointers_handled_p): New.
Diff:
---
gcc/range-op-mixed.h | 28 ++++++
gcc/range-op-ptr.cc | 245 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 273 insertions(+)
diff --git a/gcc/range-op-mixed.h b/gcc/range-op-mixed.h
index 04c8acbd94a..11b1bf0bca4 100644
--- a/gcc/range-op-mixed.h
+++ b/gcc/range-op-mixed.h
@@ -400,14 +400,42 @@ public:
bool fold_range (irange &r, tree type,
const irange &op1, const irange &op2,
relation_trio rel = TRIO_VARYING) const final override;
+ bool fold_range (prange &r, tree type,
+ const prange &op1, const prange &op2,
+ relation_trio rel = TRIO_VARYING) const final override;
+ bool fold_range (irange &r, tree type,
+ const prange &op1, const irange &op2,
+ relation_trio rel = TRIO_VARYING) const final override;
+ bool fold_range (prange &r, tree type,
+ const irange &op1, const prange &op2,
+ relation_trio rel = TRIO_VARYING) const final override;
bool op1_range (irange &r, tree type,
const irange &lhs, const irange &op2,
relation_trio rel = TRIO_VARYING) const final override;
+ bool op1_range (prange &r, tree type,
+ const prange &lhs, const prange &op2,
+ relation_trio rel = TRIO_VARYING) const final override;
+ bool op1_range (irange &r, tree type,
+ const prange &lhs, const irange &op2,
+ relation_trio rel = TRIO_VARYING) const final override;
+ bool op1_range (prange &r, tree type,
+ const irange &lhs, const prange &op2,
+ relation_trio rel = TRIO_VARYING) const final override;
relation_kind lhs_op1_relation (const irange &lhs,
const irange &op1, const irange &op2,
relation_kind) const final override;
+ relation_kind lhs_op1_relation (const prange &lhs,
+ const prange &op1, const prange &op2,
+ relation_kind) const final override;
+ relation_kind lhs_op1_relation (const prange &lhs,
+ const irange &op1, const irange &op2,
+ relation_kind) const final override;
+ relation_kind lhs_op1_relation (const irange &lhs,
+ const prange &op1, const prange &op2,
+ relation_kind) const final override;
void update_bitmask (irange &r, const irange &lh,
const irange &rh) const final override;
+ bool pointers_handled_p (range_op_dispatch_type, unsigned) const final
override;
private:
bool truncating_cast_p (const irange &inner, const irange &outer) const;
bool inside_domain_p (const wide_int &min, const wide_int &max,
diff --git a/gcc/range-op-ptr.cc b/gcc/range-op-ptr.cc
index e59e278cbd7..b8f86c8e838 100644
--- a/gcc/range-op-ptr.cc
+++ b/gcc/range-op-ptr.cc
@@ -706,6 +706,251 @@ operator_cst::pointers_handled_p (range_op_dispatch_type
type,
}
}
+// Cast between pointers.
+
+bool
+operator_cast::fold_range (prange &r, tree type,
+ const prange &inner,
+ const prange &outer,
+ relation_trio) const
+{
+ if (empty_range_varying (r, type, inner, outer))
+ return true;
+
+ r.set (type, inner.lower_bound (), inner.upper_bound ());
+ r.update_bitmask (inner.get_bitmask ());
+ return true;
+}
+
+// Cast a pointer to an integer.
+
+bool
+operator_cast::fold_range (irange &r, tree type,
+ const prange &inner,
+ const irange &outer,
+ relation_trio) const
+{
+ if (empty_range_varying (r, type, inner, outer))
+ return true;
+
+ // Represent INNER as an integer of the same size, and then cast it
+ // to the resulting integer type.
+ tree pointer_uint_type = make_unsigned_type (TYPE_PRECISION (inner.type ()));
+ r.set (pointer_uint_type, inner.lower_bound (), inner.upper_bound ());
+ r.update_bitmask (inner.get_bitmask ());
+ range_cast (r, type);
+ return true;
+}
+
+// Cast an integer to a pointer.
+
+bool
+operator_cast::fold_range (prange &r, tree type,
+ const irange &inner,
+ const prange &outer,
+ relation_trio) const
+{
+ if (empty_range_varying (r, type, inner, outer))
+ return true;
+
+ // Cast INNER to an integer of the same size as the pointer we want,
+ // and then copy the bounds to the resulting pointer range.
+ int_range<2> tmp = inner;
+ tree pointer_uint_type = make_unsigned_type (TYPE_PRECISION (type));
+ range_cast (tmp, pointer_uint_type);
+ r.set (type, tmp.lower_bound (), tmp.upper_bound ());
+ r.update_bitmask (tmp.get_bitmask ());
+ return true;
+}
+
+bool
+operator_cast::op1_range (prange &r, tree type,
+ const prange &lhs,
+ const prange &op2,
+ relation_trio trio) const
+{
+ if (lhs.undefined_p ())
+ return false;
+ gcc_checking_assert (types_compatible_p (op2.type(), type));
+
+ // Conversion from other pointers or a constant (including 0/NULL)
+ // are straightforward.
+ if (POINTER_TYPE_P (lhs.type ())
+ || (lhs.singleton_p ()
+ && TYPE_PRECISION (lhs.type ()) >= TYPE_PRECISION (type)))
+ fold_range (r, type, lhs, op2, trio);
+ else
+ {
+ // If the LHS is not a pointer nor a singleton, then it is
+ // either VARYING or non-zero.
+ if (!lhs.undefined_p () && !range_includes_zero_p (lhs))
+ r.set_nonzero (type);
+ else
+ r.set_varying (type);
+ }
+ r.intersect (op2);
+ return true;
+}
+
+bool
+operator_cast::op1_range (irange &r, tree type,
+ const prange &lhs,
+ const irange &op2,
+ relation_trio trio) const
+{
+ if (lhs.undefined_p ())
+ return false;
+ gcc_checking_assert (types_compatible_p (op2.type(), type));
+
+ // Conversion from other pointers or a constant (including 0/NULL)
+ // are straightforward.
+ if (POINTER_TYPE_P (lhs.type ())
+ || (lhs.singleton_p ()
+ && TYPE_PRECISION (lhs.type ()) >= TYPE_PRECISION (type)))
+ fold_range (r, type, lhs, op2, trio);
+ else
+ {
+ // If the LHS is not a pointer nor a singleton, then it is
+ // either VARYING or non-zero.
+ if (!lhs.undefined_p () && !range_includes_zero_p (lhs))
+ r.set_nonzero (type);
+ else
+ r.set_varying (type);
+ }
+ r.intersect (op2);
+ return true;
+}
+
+bool
+operator_cast::op1_range (prange &r, tree type,
+ const irange &lhs,
+ const prange &op2,
+ relation_trio trio) const
+{
+ if (lhs.undefined_p ())
+ return false;
+ gcc_checking_assert (types_compatible_p (op2.type(), type));
+
+ // Conversion from other pointers or a constant (including 0/NULL)
+ // are straightforward.
+ if (POINTER_TYPE_P (lhs.type ())
+ || (lhs.singleton_p ()
+ && TYPE_PRECISION (lhs.type ()) >= TYPE_PRECISION (type)))
+ fold_range (r, type, lhs, op2, trio);
+ else
+ {
+ // If the LHS is not a pointer nor a singleton, then it is
+ // either VARYING or non-zero.
+ if (!lhs.undefined_p () && !range_includes_zero_p (lhs))
+ r.set_nonzero (type);
+ else
+ r.set_varying (type);
+ }
+ r.intersect (op2);
+ return true;
+}
+
+relation_kind
+operator_cast::lhs_op1_relation (const prange &lhs,
+ const prange &op1,
+ const prange &op2 ATTRIBUTE_UNUSED,
+ relation_kind) const
+{
+ if (lhs.undefined_p () || op1.undefined_p ())
+ return VREL_VARYING;
+ unsigned lhs_prec = TYPE_PRECISION (lhs.type ());
+ unsigned op1_prec = TYPE_PRECISION (op1.type ());
+ // If the result gets sign extended into a larger type check first if this
+ // qualifies as a partial equivalence.
+ if (TYPE_SIGN (op1.type ()) == SIGNED && lhs_prec > op1_prec)
+ {
+ // If the result is sign extended, and the LHS is larger than op1,
+ // check if op1's range can be negative as the sign extension will
+ // cause the upper bits to be 1 instead of 0, invalidating the PE.
+ int_range<3> negs = range_negatives (op1.type ());
+ negs.intersect (op1);
+ if (!negs.undefined_p ())
+ return VREL_VARYING;
+ }
+
+ unsigned prec = MIN (lhs_prec, op1_prec);
+ return bits_to_pe (prec);
+}
+
+relation_kind
+operator_cast::lhs_op1_relation (const prange &lhs,
+ const irange &op1,
+ const irange &op2 ATTRIBUTE_UNUSED,
+ relation_kind) const
+{
+ if (lhs.undefined_p () || op1.undefined_p ())
+ return VREL_VARYING;
+ unsigned lhs_prec = TYPE_PRECISION (lhs.type ());
+ unsigned op1_prec = TYPE_PRECISION (op1.type ());
+ // If the result gets sign extended into a larger type check first if this
+ // qualifies as a partial equivalence.
+ if (TYPE_SIGN (op1.type ()) == SIGNED && lhs_prec > op1_prec)
+ {
+ // If the result is sign extended, and the LHS is larger than op1,
+ // check if op1's range can be negative as the sign extension will
+ // cause the upper bits to be 1 instead of 0, invalidating the PE.
+ int_range<3> negs = range_negatives (op1.type ());
+ negs.intersect (op1);
+ if (!negs.undefined_p ())
+ return VREL_VARYING;
+ }
+
+ unsigned prec = MIN (lhs_prec, op1_prec);
+ return bits_to_pe (prec);
+}
+
+relation_kind
+operator_cast::lhs_op1_relation (const irange &lhs,
+ const prange &op1,
+ const prange &op2 ATTRIBUTE_UNUSED,
+ relation_kind) const
+{
+ if (lhs.undefined_p () || op1.undefined_p ())
+ return VREL_VARYING;
+ unsigned lhs_prec = TYPE_PRECISION (lhs.type ());
+ unsigned op1_prec = TYPE_PRECISION (op1.type ());
+ // If the result gets sign extended into a larger type check first if this
+ // qualifies as a partial equivalence.
+ if (TYPE_SIGN (op1.type ()) == SIGNED && lhs_prec > op1_prec)
+ {
+ // If the result is sign extended, and the LHS is larger than op1,
+ // check if op1's range can be negative as the sign extension will
+ // cause the upper bits to be 1 instead of 0, invalidating the PE.
+ int_range<3> negs = range_negatives (op1.type ());
+ negs.intersect (op1);
+ if (!negs.undefined_p ())
+ return VREL_VARYING;
+ }
+
+ unsigned prec = MIN (lhs_prec, op1_prec);
+ return bits_to_pe (prec);
+}
+
+bool
+operator_cast::pointers_handled_p (range_op_dispatch_type type,
+ unsigned dispatch) const
+{
+ switch (type)
+ {
+ case DISPATCH_FOLD_RANGE:
+ case DISPATCH_OP1_RANGE:
+ return (dispatch == RO_PPP
+ || dispatch == RO_IPI
+ || dispatch == RO_PIP);
+ case DISPATCH_LHS_OP1_RELATION:
+ return (dispatch == RO_PPP
+ || dispatch == RO_PII
+ || dispatch == RO_IPP);
+ default:
+ return true;
+ }
+}
+
// Initialize any pointer operators to the primary table
void
