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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114792] [14 Regression] ICE on valid code at
 -O1 with "-fno-tree-ccp -fno-tree-copy-prop" on x86_64-linux-gnu: in
 get_loop_body, at cfgloop.cc:903
Date: Thu, 25 Apr 2024 06:14:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114792

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #58024|0                           |1
        is obsolete|                            |

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 58033
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D58033&action=3Dedit
patch

I'm now testing this which is more minimal surgery at least making sure we
process loops in similar order as unrolling does.  I'm not 100% convinced t=
his
is enough but it restores part of the consistency (unroll also doesn't unlo=
op
an outer loop before cleaning up the CFG and rebuilding loops after unloopi=
ng
an inner loop).=