According to the following comment:
/* We cannot inline a function of the form
void F (int i) { struct S { int ar[i]; } s; }
Attempting to do so produces a catch-22.
If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
UNION_TYPE nodes, then it goes into infinite recursion on a
structure containing a pointer to its own type. If it doesn't,
then the type node for S doesn't get adjusted properly when
F is inlined.
??? This is likely no longer true, but it's too late in the 4.0
cycle to try to find out. This should be checked for 4.1. */
We don't inline functions with variable length types but we should check this
out for 4.1 (but it is too late even for 4.1).
--
Summary: Variable length types and inlining
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: missed-optimization, FIXME
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25566
