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
