[Bug target/101504] New: [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[Bug target/101504] New: [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

            Bug ID: 101504
           Summary: [12 Regression] ICE: in lra_assign, at
                    lra-assigns.c:1649 with -O2 -march=broadwell
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 51170
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51170&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -march=broadwell testcase.c 
during RTL pass: reload
testcase.c: In function 'foo':
testcase.c:18:1: internal compiler error: in lra_assign, at lra-assigns.c:1649
   18 | }
      | ^
0xee2b8b lra_assign(bool&)
        /repo/gcc-trunk/gcc/lra-assigns.c:1649
0xedce4c lra(_IO_FILE*)
        /repo/gcc-trunk/gcc/lra.c:2387
0xe8ec59 do_reload
        /repo/gcc-trunk/gcc/ira.c:5932
0xe8ec59 execute
        /repo/gcc-trunk/gcc/ira.c:6118
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-2388-20210719001624-gbdea84c4b57-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r12-2388-20210719001624-gbdea84c4b57-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.0 20210719 (experimental) (GCC)

[Bug target/101504] [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |12.0

[Bug target/101504] [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |hjl.tools at gmail dot com
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-07-22
             Status|UNCONFIRMED                 |NEW

[Bug target/101504] [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
A patch is posted at

https://gcc.gnu.org/pipermail/gcc-patches/2021-July/575829.html

[Bug target/101504] [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jamborm at gcc dot gnu.org

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 101560 has been marked as a duplicate of this bug. ***

[Bug target/101504] [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:

https://gcc.gnu.org/g:085666673db03c2e53db368d699c47032c6c5f2e

commit r12-2495-g085666673db03c2e53db368d699c47032c6c5f2e
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Jul 22 05:17:27 2021 -0700

    x86: Don't return hard register when LRA is in progress

    Don't return hard register in ix86_gen_scratch_sse_rtx when LRA is in
    progress to avoid ICE when there are no available hard registers for
    LRA.

    gcc/

            PR target/101504
            * config/i386/i386.c (ix86_gen_scratch_sse_rtx): Don't return
            hard register when LRA is in progress.

    gcc/testsuite/

            PR target/101504
            * gcc.target/i386/pr101504.c: New test.

[Bug target/101504] [12 Regression] ICE: in lra_assign, at lra-assigns.c:1649 with -O2 -march=broadwell

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101504

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

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

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed.