https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83490
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think the problem is clear:
(call_insn/u 7 4 14 2 (set (reg:QI 0 ax)
(call (mem:QI (symbol_ref:DI ("_Zlt1AS_") [flags 0x3] <function_decl
0x7efd00f7fc00 operator<>) [0 operator< S1 A8])
(const_int 0 [0]))) 690 {*call_value}
(expr_list:REG_EH_REGION (const_int 0 [0])
(nil))
(expr_list:QI (use (mem:QI (reg/f:DI 7 sp) [0 S1 A64]))
(expr_list:QI (use (mem:QI (reg/f:DI 7 sp) [0 S1 A64]))
(nil))))
Note the two entries in CALL_INSN_FUNCTION_USAGE that have both size 1 and
overlap each other. That is of course a big no no.
If the arguments are passed such that occupy no space at all, then we shouldn't
be adding C_I_F_U entries for them (but then e.g. var-tracking will be unhappy
as it won't be able to properly find other arguments) or ensure the MEMs have
zero size. If you don't mind, I'll have a look.
