[MDEV-13220] warning: const/copy propagation disabled: xxxxx basic blocks and xxxxx registers Created: 2017-06-29  Updated: 2017-07-05  Resolved: 2017-07-05

Status: Closed
Project: MariaDB Server
Component/s: Compiling
Affects Version/s: 10.2.6
Fix Version/s: N/A

Type: Bug Priority: Minor
Reporter: Guillermo Céspedes Tabárez Assignee: Unassigned
Resolution: Won't Fix Votes: 0
Labels: compile, warning
Environment:

Debian 8.8 x32 - Digitalocean

  1. uname -a
    Linux framework 3.16.0-4-686-pae #1 SMP Debian 3.16.43-2+deb8u2 (2017-06-26) i686 GNU/Linux


 Description   

[ 47%] Building C object storage/mroonga/vendor/groonga/lib/CMakeFiles/libgroonga.dir/expr.c.o
/var/tmp/mariadb_build/mariadb_src/storage/mroonga/vendor/groonga/lib/expr.c: In function ‘grn_expr_exec’:
/var/tmp/mariadb_build/mariadb_src/storage/mroonga/vendor/groonga/lib/expr.c:3543:1: warning: const/copy propagation disabled: 21490 basic blocks and 66512 registers [-Wdisabled-optimization]
}
^
/var/tmp/mariadb_build/mariadb_src/storage/mroonga/vendor/groonga/lib/expr.c:3543:1: warning: PRE disabled: 21490 basic blocks and 66512 registers [-Wdisabled-optimization]
/var/tmp/mariadb_build/mariadb_src/storage/mroonga/vendor/groonga/lib/expr.c:3543:1: warning: const/copy propagation disabled: 21490 basic blocks and 66512 registers [-Wdisabled-optimization]
/var/tmp/mariadb_build/mariadb_src/storage/mroonga/vendor/groonga/lib/expr.c:3543:1: warning: const/copy propagation disabled: 18224 basic blocks and 67603 registers [-Wdisabled-optimization]

 Comments   
Comment by Elena Stepanova [ 2017-07-03 ]

The warnings can also be found in buildbot logs:
http://buildbot.askmonty.org/buildbot/builders/kvm-deb-jessie-x86/builds/2482/steps/compile/logs/stdio

but this warning is suppressed by compiler_warnings.supp that we use, so I'm not sure if it's supposed to be fixed.

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