[Bug ipa/63576] [5 Regression] ICE : in ipa_merge_profiles, at ipa-utils.c:540 during Firefox LTO/PGO build

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63576

--- Comment #12 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Martin pointed out that the assertion gets also hit in a pure LTO Firefox
build.
See PR64686.

When I comment out that assertion, Firefox LTO/PGO now builds fine with your
patch and the trivial fix from comment 11.