[Bug lto/65276] New: [5 Regression] LTO: ICE add_type_duplicate, at ipa-devirt.c:1462

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65276

            Bug ID: 65276
           Summary: [5 Regression] LTO: ICE add_type_duplicate, at
                    ipa-devirt.c:1462
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org

Created attachment 34919
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34919&action=edit
File "one.ii" - compile with -O0 (g++ -w -c -flto -O0 -std=c++11 one.ii)

Seems to be introduced in the last few days (max. 2 weeks) as it compiled
before.

The attached program fails with:
lto1: internal compiler error: in add_type_duplicate, at ipa-devirt.c:1462

Compile with:
  g++ -w -c -flto -O0 -std=c++11 one.ii
  g++ -w -c -flto -O2 -std=c++11 two.ii
  gcc -r -nostdlib -O0 -Wodr -flto-odr-type-merging one.o two.o