[Bug middle-end/46932] Inefficient code sequence to access local variable

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46932

--- Comment #10 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Author: aldyh
Date: Wed Sep 13 16:57:00 2017
New Revision: 252423

URL: https://gcc.gnu.org/viewcvs?rev=252423&root=gcc&view=rev
Log:
Add check_effective_target_autoincdec.

Add check_effective_target_autoincdec that returns true if a target
runs the auto_inc_dec optimization pass.

    gcc/
        * doc/sourcebuild.texi (autoincdec): Add autoincdec description.

    gcc/testsuite/
        PR middle-end/46932
        * gcc.dg/pr46932.c: Use dg-require-effective-target autoincdec.
        * lib/target-supports.exp: Add check_effective_target_autoincdec.

Modified:
    branches/range-gen2/gcc/ChangeLog
    branches/range-gen2/gcc/doc/sourcebuild.texi
    branches/range-gen2/gcc/testsuite/ChangeLog
    branches/range-gen2/gcc/testsuite/gcc.dg/pr46932.c
    branches/range-gen2/gcc/testsuite/lib/target-supports.exp