[PATCH] Do not change scope for unknown locations

[Dehao Chen]

Hi,

As Richard suggested, if a location is UNKNOWN_LOCATION, instead of
change_scope to DECL_INITIAL (cfun->decl), we should let it inherit
location from its previous instructions. This is implemented in the
attached patch.

Bootstrapped and passed gcc regression tests and gdb regression tests.

Is it okay for trunk?

Thanks,
Dehao

gcc/ChangeLog:
2012-11-02  Dehao Chen  <de...@google.com>

        * final.c (reemit_insn_block_notes): Do not change scope if insn
        location is UNKNOWN_LOCATION.

block.patch
Description: Binary data