[Bug middle-end/17416] New: stack variable merging doesn't work

[ak at muc dot de]

I tried a simple test of the new stack merging functionality in mainline
and it refused to merge variables in differenct scopes.

e.g. the attached example generates with -O2:


f:
.LFB2:
        subq    $232, %rsp

I would have expected a stack frame size around 100

-- 
           Summary: stack variable merging doesn't work
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ak at muc dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: x86_64-linux
  GCC host triplet: x86_64-linux
GCC target triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17416