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* [gcc r13-3902] [range-ops] Avoid unnecessary intersection in update_known_bitmask.
@ 2022-11-11 13:53 Aldy Hernandez
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From: Aldy Hernandez @ 2022-11-11 13:53 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:c0662c74969820fb576c8a2f35e946581c2c6f9d
commit r13-3902-gc0662c74969820fb576c8a2f35e946581c2c6f9d
Author: Aldy Hernandez <aldyh@redhat.com>
Date: Fri Nov 11 10:11:03 2022 +0100
[range-ops] Avoid unnecessary intersection in update_known_bitmask.
All the work for keeping the maybe nonzero masks up to date is being
done by the bit-CCP code now. Any bitmask inherent in the range that
range-ops may have calculated has no extra information, so the
intersection is unnecessary.
gcc/ChangeLog:
* range-op.cc (update_known_bitmask): Avoid unnecessary intersection.
Diff:
---
gcc/range-op.cc | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 9eec46441a3..0b01cf48fdf 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -89,10 +89,7 @@ update_known_bitmask (irange &r, tree_code code,
bit_value_binop (code, sign, prec, &value, &mask,
lh_sign, lh_prec, lh_value, lh_mask,
rh_sign, rh_prec, rh_value, rh_mask);
-
- int_range<2> tmp (type);
- tmp.set_nonzero_bits (value | mask);
- r.intersect (tmp);
+ r.set_nonzero_bits (value | mask);
}
// Return the upper limit for a type.
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