[Bug target/71549] ICE on valid code at -O2 and -O3 with -g enabled in 64-bit mode on x86_64-linux-gnu: in simplify_subreg, at simplify-rtx.c:5952

["hjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71549

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed.

--- Comment #8 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Jun 21 14:24:31 2016
New Revision: 237647

URL: https://gcc.gnu.org/viewcvs?rev=237647&root=gcc&view=rev
Log:
Convert V1TImode register to TImode in debug insn

TImode register referenced in debug insn can be converted to V1TImode
by scalar to vector optimization.  After converting a TImode register
to V1TImode, we need to check all debug insns on its use chain to
convert the V1TImode register to SUBREG TImode.

gcc/

2016-06-21  H.J. Lu  <hongjiu.lu@intel.com>
            Ilya Enkovich  <ilya.enkovich@intel.com>

        PR target/71549
        * config/i386/i386.c (timode_scalar_chain::fix_debug_reg_uses):
        New member function to convert V1TImode register to SUBREG
        TImode in debug insn.
        (timode_scalar_chain::convert_insn): Call fix_debug_reg_uses
        after changing register mode to V1TImode.

gcc/testsuite/

2016-06-21  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/71549
        * gcc.target/i386/pr71549.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr71549.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog