[Bug rtl-optimization/78120] [6/7 Regression] If conversion no longer performed

[bernds at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78120

--- Comment #12 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Thu Nov 24 12:22:16 2016
New Revision: 242834

URL: https://gcc.gnu.org/viewcvs?rev=242834&root=gcc&view=rev
Log:
        PR rtl-optimization/78120
        * ifcvt.c (noce_conversion_profitable_p): Check original cost in all
        cases, and additionally test against max_seq_cost for speed
        optimization.
        (noce_process_if_block): Compute an estimate for the original cost when
        optimizing for speed, using the minimum of then and else block costs.

testsuite/
        PR rtl-optimization/78120
        * gcc.target/i386/pr78120.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr78120.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ifcvt.c
    trunk/gcc/testsuite/ChangeLog