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From: "manolis.tsamis at vrull dot eu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/102793] AArch64: sequential comparisons with
 equal conditional blocks don't use ccmp
Date: Fri, 05 Apr 2024 12:35:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102793

Manolis Tsamis <manolis.tsamis at vrull dot eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manolis.tsamis at vrull do=
t eu

--- Comment #6 from Manolis Tsamis <manolis.tsamis at vrull dot eu> ---
Created attachment 57886
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D57886&action=3Dedit
Patch with proposed fix for the issue.

Adding a copy of the ifcombine pass after pre solves this issues and improv=
es
code generation is some other cases too. I specifically chose after the pre
pass because it deduplicates basic blocks and helps in maximizing the effec=
t of
ifcombine.=