[PATCH] Avoid dumping fancy names in -fcompare-debug dumps (PR c++/84704)

[Jeff Law]

On 03/06/2018 01:47 PM, Jakub Jelinek wrote:
> Hi!
> 
> As discussed, e.g. gimplification of STATEMENT_LISTs can create extra
> retval.N temporaries for -g and get the counts out of sync, similarly
> the SAVE_EXPR change proposed in the fix for that PR could for decls
> in the statement expressions or addresses thereof get the fancy names
> counters out of sync.
> 
> The following patch marks the temporaries DECL_NAMELESS in addition to
> DECL_IGNORED_P and in the dumps used for -fcompare-debug checking
> prints those as D.xxxx rather than retval.234.
> 
> Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
> 
> 2018-03-06  Jakub Jelinek  <jakub@redhat.com>
> 
> 	PR c++/84704
> 	* gimple-expr.c (create_tmp_var_raw): Set DECL_NAMELESS flag
> 	on tmp_var.
> 	* tree-pretty-print.c (dump_decl_name): For TDF_COMPARE_DEBUG,
> 	don't print names of DECL_NAMELESS DECL_IGNORED_P decls.
OK.
jeff