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[PATCH, rtl]: Mode-switching: Mark block as nontransparent if its exiting mode != no_mode


Hello!

Attached patch fixes an oversight in mode-switching. For blocks
without ANY mode requirements, we have to consider instructions with
MODE_AFTER mode changes. If the exiting mode from the block is
different that no_mode (the mode we start), we have to mark the block
as nontransparent.

2013-11-08  Uros Bizjak  <ubizjak@gmail.com>

    * mode-switching.c (optimize_mode_switching): Mark block as
    nontransparent, if last_mode at block exit is different from no_mode.

Bootstrapped and regression tested on x86_64-pc-linux-gnu {,-m32}
core-avx-i configured bootstrap.

OK for mainline and branches?

Thanks,
Uros.

Attachment: p.diff.txt
Description: Text document


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