[Bug target/112265] New: [14 Regression] GCN offloading 'libgomp.c-c++-common/for-5.c': 'internal compiler error: maximum number of generated reload insns per insn achieved (90)'

[Bug target/112265] New: [14 Regression] GCN offloading 'libgomp.c-c++-common/for-5.c': 'internal compiler error: maximum number of generated reload insns per insn achieved (90)'

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112265

            Bug ID: 112265
           Summary: [14 Regression] GCN offloading
                    'libgomp.c-c++-common/for-5.c': 'internal compiler
                    error: maximum number of generated reload insns per
                    insn achieved (90)'
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, openmp, testsuite-fail
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: ams at gcc dot gnu.org, jules at gcc dot gnu.org
  Target Milestone: ---
            Target: GCN

(Assuming my tacking is to be believed) something in Git commit
r14-4720-gaf4bb221153359f5948da917d5ef2df738bb1e61..r14-4986-g4d3d2cdb574488223d023b590c3a34ddd93f4dae
regressed GCN offloading 'libgomp.c-c++-common/for-5.c' both C and C++
compilation:

    [-PASS:-]{+FAIL: libgomp.c/../libgomp.c-c++-common/for-5.c (internal
compiler error: maximum number of generated reload insns per insn achieved
(90))+}
    {+FAIL:+} libgomp.c/../libgomp.c-c++-common/for-5.c (test for excess
errors)
    [-PASS:-]{+UNRESOLVED:+} libgomp.c/../libgomp.c-c++-common/for-5.c
[-execution test-]{+compilation failed to produce executable+}

    [-PASS:-]{+FAIL: libgomp.c++/../libgomp.c-c++-common/for-5.c (internal
compiler error: maximum number of generated reload insns per insn achieved
(90))+}
    {+FAIL:+} libgomp.c++/../libgomp.c-c++-common/for-5.c (test for excess
errors)
    [-PASS:-]{+UNRESOLVED:+} libgomp.c++/../libgomp.c-c++-common/for-5.c
[-execution test-]{+compilation failed to produce executable+}

All of '-march=fiji', '-march=gfx900', '-march=gfx906', '-march=gfx908',
'-march=gfx90a' are affected.

[Bug target/112265] [14 Regression] GCN offloading 'libgomp.c-c++-common/for-5.c': 'internal compiler error: maximum number of generated reload insns per insn achieved (90)'

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112265

Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:

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

--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
The ICE goes away if I revert PR111000 commit
r14-4786-gd118738e71cf4615f170fff8dabe66442206d008 "tree-optimization/111000 -
restrict invariant motion of shifts".  What that now tells us I have no clue.

[Bug target/112265] [14 Regression] GCN offloading 'libgomp.c-c++-common/for-5.c': 'internal compiler error: maximum number of generated reload insns per insn achieved (90)'

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112265

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |14.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #1)
> The ICE goes away if I revert PR111000 commit
> r14-4786-gd118738e71cf4615f170fff8dabe66442206d008 "tree-optimization/111000
> - restrict invariant motion of shifts".  What that now tells us I have no
> clue.

That it was a latent bug; I wonder if there is a way to expose it before that
patch. Maybe a GIMPLE testcase ...

[Bug target/112265] [14 Regression] GCN offloading 'libgomp.c-c++-common/for-5.c': 'internal compiler error: maximum number of generated reload insns per insn achieved (90)'

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112265

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-tree-loop-im?

[Bug target/112265] [14 Regression] GCN offloading 'libgomp.c-c++-common/for-5.c': 'internal compiler error: maximum number of generated reload insns per insn achieved (90)'

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112265

Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|UNCONFIRMED                 |RESOLVED
           Assignee|unassigned at gcc dot gnu.org      |vmakarov at gcc dot gnu.org

--- Comment #4 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Resolved via commit r14-6667-g989e67f827b74b76e58abe137ce12d948af2290c
"[PR112918][LRA]: Fixing IRA ICE on m68k".

*** This bug has been marked as a duplicate of bug 112918 ***