Re: [PATCH] Fix debug info for expr and jump stmt

[Dehao Chen <dehao at google dot com>]

Hi,

I've updated the patch:

1. abandon the changes in cfgexpand.c
2. set the block for trees when lowering gimple stmt.
3. add a unittest.

However, this patch will trigger two lto bug when asserting
LTO_NO_PREVAIL for TREE_CHAIN. After debugging for a while, I found
that the problem was also there even without the patch. This patch
just reveal the problem by moving a decl into cache so that it will be
checked. As I'm not familiar with LTO, not quite sure what the root
problem is. Can anyone help take a look?

Thanks,
Dehao

gcc/ChangeLog:
2012-10-25  Dehao Chen  <dehao@google.com>

        * tree-eh.c (do_return_redirection): Set location for jump statement.
        (do_goto_redirection): Likewise.
        (frob_into_branch_around): Likewise.
        (lower_try_finally_nofallthru): Likewise.
        (lower_try_finally_copy): Likewise.
        (lower_try_finally_switch): Likewise.
        * gimple-low.c (tree_set_block_r): New callback function.
        (lower_stmt): Set block for tested expr.

gcc/testsuite/ChangeLog:
2012-10-25  Dehao Chen  <dehao@google.com>

        * g++.dg/debug/dwarf2/block.C: New testcase.

Attachment: patch.txt
Description: Text document