Fix bug in mul_shift_right matching #6610
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widening_mul handles mixed-signedness args, but mul_shift_right doesn't. We shouldn't map a mixed-signedness widening_mul to a mul_shift_right.
abadams
added
bug
backport me
steven-johnson
approved these changes
Feb 8, 2022
shoaibkamil
reviewed
Feb 8, 2022
| @@ -384,6 +384,7 @@ class FindIntrinsics : public IRMutator { | |||
| auto is_x_same_int = op->type.is_int() && is_int(x, bits); | |||
| auto is_x_same_uint = op->type.is_uint() && is_uint(x, bits); | |||
| auto is_x_same_int_or_uint = is_x_same_int || is_x_same_uint; | |||
| auto x_y_same_sign = (is_int(x) && is_int(y)) || (is_uint(x) && is_uint(y)); | |||
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I think a comment here would help-- it's not necessarily clear at first glance what is_int() means compared to Type::is_int()
shoaibkamil
approved these changes
Feb 8, 2022
|
Failure unrelated. |
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widening_mul handles mixed-signedness args, but mul_shift_right doesn't.
We shouldn't map a mixed-signedness widening_mul to a mul_shift_right.