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From: "muecker at gwdg dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/108423] [12/13 Regression] ICE in make_ssa_name_fn with VLA
 types in arguments and inlining since r12-5338-g4e6bf0b9dd5585df
Date: Sun, 22 Jan 2023 14:30:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108423

--- Comment #7 from Martin Uecker <muecker at gwdg dot de> ---


* gimplify_type_size does not recurse into pointer, record, or function typ=
es
(the later are not mentioned).=20

* the C FE has code to emit fake TYPE_DECLs for pointer types in
c-decl.cc/grokdeclarator=20

* In the FE, size expressions in parameters go into pending_sizes and emitt=
ed
at a start of a function c-decl.cc/store_parm_decls

* function.cc/gimplify_parm_type only considers types with non-constant size
and otherwise recurses only into pointer types


How all this fits together is a bit of mystery to me.=20

Modifying gimplify_parm_type to also recurse into function types seems to f=
ix
this bug (and PR107557) but I am not sure if this is the right fix. Then th=
ere
should also be similar missing cases related to records/unions?=