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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/97314] bootstrap failure on i686-linux-gnu with
 --enable-checking=yes,extra,rtl
Date: Tue, 17 Nov 2020 15:14:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97314

rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rsandifo at gcc dot gnu.org

--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.or=
g> ---
I see the same thing for arm-linux-gnueabihf on trunk, also on
insn-extract.o.  It's specific to RTL checking for me too.

I found it does work if I bootstrap with --enable-checking=3Dyes,extra,
flip ENABLE_RTL_CHECKING to 1 in auto-host.h, and then recompile
insn-extract.c.  But it does take a large amount of VM:

phase parsing                      :  51.10 ( 27%)  43.64 ( 74%)  94.74 ( 3=
8%)=20
1334M ( 73%)

This used to work =E2=80=9Ca while ago=E2=80=9D but I don't know when it st=
opped.

The file has 9975 lines, 435KiB, but that's a bairn compared to some
of the stuff we kick out.  Perhaps it's just the sheer number of
(nested) XEXP macro expansions?=