[PATCH, PR70161] Fix fdump-ipa-all-graph

[Richard Biener]

On Mon, 14 Mar 2016, Tom de Vries wrote:

> Hi,
> 
> this patch fixes PR70161, a 4.9/5/6 regression.
> 
> Currently when using -fdump-ipa-all-graph, the compiler ICEs in
> execute_function_dump when testing for pass->graph_dump_initialized, because
> pass == NULL.
> 
> The patch fixes:
> - the ICE by setting the pass argument in the call to
>   execute_function_dump in execute_one_ipa_transform_pass
> - a subsequent ICE (triggered with -fipa-pta) by saving, resetting and
>   restoring dump_file_name in cgraph_node::get_body, alongside the
>   saving and restoring of the dump_file variable.
> - the duplicate edges in the subsequently generated dot file by
>   ensuring that execute_function_dump is called only once per function
>   per pass. [ Note that this bit also has an effect for the normal dump
>   files for the ipa passes with transform function. For those functions,
>   atm execute_function_dump is called both after execute and after
>   transform. With the patch, it's only called after transform. ]
> 
> Bootstrapped and reg-tested on x86_64.
> 
> OK for stage4?

Ok.

Thanks,
Richard.