[PATCH] Always inline system calls

Mike Frysinger vapier at gentoo.org
Thu Jan 10 17:09:31 UTC 2008


On Tuesday 04 December 2007, Carmelo AMOROSO wrote:
> Paul Mundt wrote:
> > On Mon, Dec 03, 2007 at 10:33:39PM +0100, Carmelo Amoroso wrote:
> >> Carmelo Amoroso wrote:
> >> while doing some test for SH4 to measure size increase for 'always
> >> inline' changes, doscovered suddenly that gcc-4.1.1 (cross sh4) fails
> >> with the following error:
> >>
> >> ../ldso/ldso/dl-elf.c: In function '_dl_dprintf':
> >> ../ldso/ldso/dl-elf.c:858: error: unable to find a register to spill in
> >> class 'R0_REGS' ../ldso/ldso/dl-elf.c:858: error: this is the insn:
> >> (insn 916 917 24 1 (set (reg/f:SI 1 r1 [219])
> >>          (mem/u/c:SI (plus:SI (reg:SI 12 r12)
> >>                  (reg/f:SI 1 r1 [220])) [0 S4 A32])) 172 {movsi_ie}
> >> (nil) (expr_list:REG_DEAD (reg/f:SI 1 r1 [220])
> >>          (expr_list:REG_EQUIV (symbol_ref:SI ("_dl_pagesize") <var_decl
> >> 0x313a720 _dl_pagesize>) (nil))))
> >>
> >> either running with -Os or -O0.
> >> I'll test tomorrow with gcc-4.2.1 to see if it makes difference,
> >> otherwise I suspect we should go back on my proposal in using always
> >> inline only for arch strictly requiring it.
> >
> > We've noticed this with some versions in buildroot also, so it seems to
> > be a more common issue:
>
> Indeed at home I have gcc from buildroot. Tested just now at office
> using gcc-4.2.1 from STMicro toolchain
> and it works fine, either using -O0 or -Os.
> I'll try to update buildroot at home with gcc 4.2.1 as well and see if
> it solves.
> I'll keep you informed.

so what's up ?  bug in gcc ?  PR opened up stream ?  reduced test case made ?
-mike
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