https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109607
Bug ID: 109607
Summary: IPA replaces stmt with invalid gimple
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
On cfghooks.cc we replace
BIT_FIELD_REF <*this_8(D), 8, 56>
with
BIT_FIELD_REF <VIEW_CONVERT_EXPR<const struct profile_count>(ISRA.814), 8, 56>
in ipa_param_body_adjustments::modify_expression. The replacement seems
to be of type 'unsigned long'. This is (should be) invalid GIMPLE unless
ISRA.814 is made a non-register.
Note when replacing memory with register BIT_FIELD_REFs have to be careful
with endianess (IIRC), thus the replacement looks dangerous anyway.
A fix for PR109594 will make us trip over this new IL checking during
bootstrap.
