[Bug gcov-profile/45890] New: Coverage may be weakened by r164986

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45890

           Summary: Coverage may be weakened by r164986
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gcov-profile
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: rgue...@gcc.gnu.org


r164986 moves edge instrumentation for coverage after early optimizations
which may weaken location information enough to in turn weaken coverage
results.

A precise-coverage option might be useful that performs instrumentation
before any optimization or inlining is performed (unlike the state before
r164986 where inlining was performed before coverage analysis).