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Re: Tree sharing issues...
- From: law at redhat dot com
- To: Jan Hubicka <jh at suse dot cz>
- Cc: Jan Hubicka <hubicka at ucw dot cz>, Richard Henderson <rth at redhat dot com>, gcc at gcc dot gnu dot org
- Date: Wed, 19 Nov 2003 15:49:37 -0700
- Subject: Re: Tree sharing issues...
- Reply-to: law at redhat dot com
In message <20031119224619.GP11681@kam.mff.cuni.cz>, Jan Hubicka writes:
>> >OK, I will extend my sharing test by is_gimple_min_invariant. Does that
>> >look right?
>> is_gimple_min_invariant (blah) && ! IS_EMPTY_STMT (blah) since I
>> believe the empty statement is (void) 0, but is not shared.
>>
>> Ugh.
>OK, another positive:
>../../gcc/caller-save.c:370: error: Wrong sharing of tree nodes
># hard_regs_to_save_6 = VDEF <hard_regs_to_save_624>;
>hard_regs_to_save[1] = T.329_1370;
>
>hard_regs_to_save[1];
>
>../../gcc/caller-save.c:370: error: Wrong sharing of tree nodes
># hard_regs_to_save_143 = VDEF <hard_regs_to_save_81>;
>hard_regs_to_save[1] = T.339_1393;
>
>hard_regs_to_save[1];
>
>../../gcc/caller-save.c:370: error: Wrong sharing of tree nodes
># hard_regs_to_save_623 = VDEF <hard_regs_to_save_488>;
>hard_regs_to_save[1] = T.349_1416;
>
>hard_regs_to_save[1];
>
>../../gcc/caller-save.c:370: error: Wrong sharing of tree nodes
># hard_regs_to_save_80 = VDEF <hard_regs_to_save_5>;
>hard_regs_to_save[1] = T.357_1437;
>
>hard_regs_to_save[1];
>
>
>This looks wrong. Seems to happen during jump threading...
I'm not sure why we wouldn't be sharing that node
(hard_regs_to_save[1]).
Diego?
jeff