https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109607
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:d89e23f27215fcd822994fb2fad17fcd31eef5e1 commit r14-295-gd89e23f27215fcd822994fb2fad17fcd31eef5e1 Author: Richard Biener <rguent...@suse.de> Date: Wed Apr 26 13:05:44 2023 +0200 ipa/109607 - properly gimplify conversions introduced by IPA param manipulation The following addresses IPA param manipulation (through IPA SRA) replacing BIT_FIELD_REF <*this_8(D), 8, 56> with BIT_FIELD_REF <VIEW_CONVERT_EXPR<const struct profile_count>(ISRA.814), 8, 56> which is supposed to be invalid GIMPLE (ISRA.814 is a register). There's currently insufficient checking in place to catch this in the IL verifier but I am working on that as part of fixing PR109594. The solution for the particular testcase I am running into this is to split the conversion to a separate stmt. Generally the modification phase is set up for this but the extra_stmts sequence isn't passed around everywhere. The following passes it to modify_expression from modify_assignment when rewriting the RHS. PR ipa/109607 * ipa-param-manipulation.h (ipa_param_body_adjustments::modify_expression): Add extra_stmts argument. * ipa-param-manipulation.cc (ipa_param_body_adjustments::modify_expression): Likewise. When we need a conversion and the replacement is a register split the conversion out. (ipa_param_body_adjustments::modify_assignment): Pass extra_stmts to RHS modify_expression. * g++.dg/torture/pr109607.C: New testcase.
