[Bug middle-end/96680] [11 Regression][OpenMP][LTO] Declare variant + ICE in lto_fixup_prevailing_decls, at lto/lto-common.c:2595

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96680

Richard Biener  changed:

   What|Removed |Added

   Priority|P3  |P1

--- Comment #4 from Richard Biener  ---
 

[Bug middle-end/96680] [11 Regression][OpenMP][LTO] Declare variant + ICE in lto_fixup_prevailing_decls, at lto/lto-common.c:2595

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96680

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|--- |11.0

[Bug middle-end/96680] [11 Regression][OpenMP][LTO] Declare variant + ICE in lto_fixup_prevailing_decls, at lto/lto-common.c:2595

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96680

--- Comment #3 from Tobias Burnus  ---
Some regression hunting:
* Fails with r11-652-g79ea774f9a9d36d986152d93f9eae4a9ba36b37b
* Works on OG10 = devel/omp/gcc-10 and presumably GCC 10.

My bet is that the following commit causes the issue, but that trunk version
fails to build here: r11-382-g7a50e7087567cffb21e81fff566546b8a8dac270
(2020-05-14)
Namely:
  openmp: cgraph support for late declare variant resolution

[Bug middle-end/96680] [11 Regression][OpenMP][LTO] Declare variant + ICE in lto_fixup_prevailing_decls, at lto/lto-common.c:2595

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96680

--- Comment #2 from Tobias Burnus  ---
Created attachment 49075
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49075=edit
C testcase - de-macro-fied version sollve_vv's 
5.0/declare_variant/test_declare_variant.c

[Bug middle-end/96680] [11 Regression][OpenMP][LTO] Declare variant + ICE in lto_fixup_prevailing_decls, at lto/lto-common.c:2595

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96680

--- Comment #1 from Tobias Burnus  ---
In the debugger, the first call to lto_fixup_prevailing_decls is for
main._omp_fn.0 and the second - and failing - one is for

(gdb) p debug_tree(t)