[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

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114792

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

           What    |Removed                     |Added
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  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        is obsolete|                            |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=58033&action=edit
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 this
is enough but it restores part of the consistency (unroll also doesn't unloop
an outer loop before cleaning up the CFG and rebuilding loops after unlooping
an inner loop).