[PATCH] Fix -Wshadow=local warnings in passes.c

[Bernd Edlinger]

Hi,

this fixes -Wshadow=local warnings in passes.c.
The non-trivial part is due to the PUSH_INSERT_PASSES_WITHIN
is used recursively, and shadows the local value p
in each invocation.

Fixed by using a helper class that restores the saved content
of p at the end of the block.

The shadowing variable in ipa_write_summaries can simply be
removed sine the outer variable of the same name has the
same type and is not live here, this is a trivial change.


Bootstrapped and reg-tested on x86_64-pc-linux-gnu.
Is it OK for trunk?


Thanks
Bernd.

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