[Bug lto/40903] New: LTO doesn't merge common sections properly

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

t1.c
double i;

t2.c
int i;
int main () { return i; }

should be accepted with -fcommon.

What needs to be done is that we have to keep a list of decls per symtab
entry that we might end up merging to and we need to return the proper
decl when looking up the canonical decl.

A warning is still appropriate here.

This happens in several SPEC 2000 and SPEC 2006 benchmarks.


-- 
           Summary: LTO doesn't merge common sections properly
           Product: gcc
           Version: lto
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40903