Hello!

As shown in the PR [1], RTX costs can reject combination of the
operation and its embedded comparison. Attached patch fixes this by
ignoring the cost of embedded comparison.

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65871#c10

2015-06-22  Uros Bizjak  <ubizjak@gmail.com>

    PR target/65871
    * config/i386/i386.c (ix86_rtx_costs) <case COMPARE>: Ignore the
    cost of embedded comparison.

Bootstrapped on x86_64-linux-gnu, regtest in progress.

Uros.