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From: "sjames at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/109724] New: [10 regression] Huge memory usage when
 building qtwebengine's SkOpAngle.cpp
Date: Thu, 04 May 2023 01:53:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109724

            Bug ID: 109724
           Summary: [10 regression] Huge memory usage when building
                    qtwebengine's SkOpAngle.cpp
           Product: gcc
           Version: 10.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sjames at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---

Created attachment 54988
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D54988&action=3Dedit
SkOpAngle.ii.xz

Originally reported downstream in Gentoo at https://bugs.gentoo.org/905634.=
=20

Matthew Ogilvie reports that 10.4.1 20230119
(18bc39a4c83f8d59175061a58637de9f4b2a54d4) is OK, but 10.4.1 20230426
(db0b8927d663cf54ad13dc2629ec195e3883d0d0) is not.

releases/gcc-10 is bad too.

---


```
$ g++ -O2 /tmp/SkOpAngle.ii -c
[consumes a huge amount of memory quite quickly and takes a long time to
compile, OOMs before I can complete compilation (it may not even terminate?=
)]

```

----

Bisect says

051f78a5c1d6994c10ee7c35453ff0ccee94e5c6 is the first bad commit
commit 051f78a5c1d6994c10ee7c35453ff0ccee94e5c6
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Sep 2 13:36:13 2022 +0200

    tree-optimization/106809 - compile time hog in VN

i.e. r10-11201-g051f78a5c1d699.=