[Bug target/71399] [5/6/7 Regression] 5.3.0 bootstrap comparison failure on arm-linux-gnueabihf

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71399

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
One can use --param min-nondebug-insn-uid=10000 or something similar to make
RTL dumps easier to compare; while the insns surrounded by debug insns still
have different numbers for previous and/or next insn, if there are larger
blocks of insns without debug insns in between them, there shouldn't be that
many differences.
First of all, can you reproduce the bug just with -fcompare-debug added to the
list of options to compile say real.c (or whatever other file that shows the
differences)?  If yes, then do -fdump-tree-all -da and then try to find the
first dump with differences.
If not, then most likely some stage is miscompiled.