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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/102519] [12 Regression] VRP Jump threader memory
 explosion
Date: Wed, 29 Sep 2021 20:46:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102519

--- Comment #15 from David Edelsohn <dje at gcc dot gnu.org> ---
I annotated execute_vrp_threader() to call getrusage() and print the size of
RSS around each call to threader.thread_jumps().  It consistently is growin=
g,
but not in the threader itself.  Was the former VPR Threader intentionally =
or
implicitly freeing some other data allocated by the compiler that the new
threader is not cleaning up?

Assembling  functions:
 f_0_0_0
RSS =3D 569788
RSS =3D 569788
RSS =3D 569792
RSS =3D 569792
 g_0_0_0
RSS =3D 569876
RSS =3D 569876
RSS =3D 569880
RSS =3D 569880
 f_0_0_1
RSS =3D 569880
RSS =3D 569880
RSS =3D 569884
RSS =3D 569884
...
g_17_15_17
RSS =3D 783824
RSS =3D 783824
RSS =3D 783836
RSS =3D 783836
 f_17_15_23
RSS =3D 783892
RSS =3D 783892
RSS =3D 783896
RSS =3D 783896

cc1: out of memory allocating 65536 bytes after a total of 1071909664 bytes=