[PATCH, i386]: Fix PR89848, ICE: in convert_op

[Uros Bizjak <ubizjak at gmail dot com>]

On Tue, Mar 26, 2019 at 8:05 PM Uros Bizjak <ubizjak@gmail.com> wrote:
>
> Attached patch fixes a corner case in STV pass where the shift operand
> register equals shift count register. The specialization for shift
> insns marked register as processed, but didn't process shift input
> operand, leaving an unprocessed DImode register.

There is another instance of the same problem in make_vector_copies.

2019-03-28  Uroš Bizjak  <ubizjak@gmail.com>

    PR target/89848
    * config/i386/i386.c (dimode_scalar_chain::make_vector_copies):
    Also process XEXP (src, 0) of a shift insn.

testsuite/ChangeLog:

2019-03-28  Uroš Bizjak  <ubizjak@gmail.com>

    PR target/89848
    * gcc.target/i386/pr89848.c: New test.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Committed to mainline SVN, will be backported to gcc-8 branch.

Uros.

Attachment: p.diff.txt
Description: Text document