[PATCH] IPA-CP release transformation summary (PR jit/91928)

[Andrea Corallo]

Hi all,
I'd like to submit this patch.
It release the ipa cp transformation summary after functions being expanded.
This is to fix the compiler when used with libgccjit on subsequent
compilations (every new compilation should have a clean transformation
summary).

Bootstrap on arm64 and X86-64.

Bests
  Andrea

gcc/ChangeLog
2019-??-??  Andrea Corallo  <andrea.corallo@arm.com>

	* cgraphunit.c (expand_all_functions): Release ipcp_transformation_sum
	when finished.
	* ipa-prop.c (ipcp_free_transformation_sum): New function.
	* ipa-prop.h (ipcp_free_transformation_sum): Add declaration.
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