profile: Another profiling musttail call fix [PR119535]

profile: Another profiling musttail call fix [PR119535]

As the following testcase shows, EDGE_FAKE edges from musttail calls to
EXIT aren't the only edges we should ignore, we need to ignore also
edges created by the splitting of blocks for the EDGE_FAKE creation that
point from the musttail calls to the fallthrough block, which typically does
the return or with PHIs for the return value.

2025-04-01  Jakub Jelinek  <jakub@redhat.com>

	PR gcov-profile/119535
	* profile.cc (branch_prob): Ignore any edges from bbs ending with
	musttail call, rather than only EDGE_FAKE edges from those to EXIT.

	* c-c++-common/pr119535.c: New test.