Hi,

we recently received the report that the IPA-SRA pass introduced in GCC 10 
does not always play nice with the reverse scalar storage order that can be 
used in structures/records/unions.  Reading the code, the pass apparently 
correctly detects it but fails to propagate the information to the rewriting 
phase in some cases and, in particular, does not stream it for LTO.

The attached patch is a tentative fix for these issues spotted essentially by 
code reading.  It also contains various minor tweaks left and right.

Bootstrapped/regtested on x86-64/Linux, OK for mainline, 11 and 10 branches?


2022-01-11  Eric Botcazou  <ebotcazou@adacore.com>

	* ipa-param-manipulation.c (ipa_dump_adjusted_parameters): Dump
	reverse flag as "reverse" for the sake of consistency.
	* ipa-sra.c: Fix copyright year.
	(ipa_sra_function_summaries::duplicate): Copy the reverse flag.
	(dump_isra_access): Remove confusing dump line.
	(isra_write_node_summary): Write the reverse flag.
	(isra_read_node_info): Read it.
	(pull_accesses_from_callee): Copy it.

-- 
Eric Botcazou