[Bug debug/107832] New: '-fcompare-debug' failure w/ -O2 -ftree-parallelize-loops=2 -fno-gcse-lm

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107832

            Bug ID: 107832
           Summary: '-fcompare-debug' failure w/ -O2
                    -ftree-parallelize-loops=2 -fno-gcse-lm
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: compare-debug-failure
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: aarch64-linux-gnu

Created attachment 53951
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53951&action=edit
Testcase

gcc 13.0.0 20221120 snapshot (g:a16a5460447eaaff0b4468064e4d7b1cc8fc42eb) fails
-fcompare-debug when compiling the attached testcase w/ -O2
-ftree-parallelize-loops=2 -fno-gcse-lm:

% aarch64-linux-gnu-gfortran-13 -O2 -fcompare-debug -ftree-parallelize-loops=2
-fno-gcse-lm -c ebqijrx1.f90
aarch64-linux-gnu-gfortran-13: error: ebqijrx1.f90: '-fcompare-debug' failure

--- ebqijrx1.f90.gkd    2022-11-23 18:26:10.937790540 +0700
+++ ebqijrx1.gk.f90.gkd 2022-11-23 18:26:10.986790649 +0700
@@ -1111,7 +1111,7 @@
 4:   integer(kind=8) D.xxxx;
 5:   integer(kind=8) D.xxxx;

-;; Function main._loopfn.0 (main._loopfn.0, funcdef_no=6, cgraph_uid=13,
symbol_order=19)
+;; Function main._loopfn.0 (main._loopfn.0, funcdef_no=6, cgraph_uid=13,
symbol_order=20)

 (note # 0 0 NOTE_INSN_DELETED)
 (note # 0 0 [bb 2] NOTE_INSN_BASIC_BLOCK)