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[PATCH v4 0/4] [i386] PR80969 Fix ICE with -mabi=ms -mavx512f


I had to fix a few things for x32 compatibility and I this is ready
now.  H.J. tested on machine with avx512 (including x32) and I've tested
both native x32 and normal x86_64 with m64, m32 and mx32 and all is
well.  I've made more changes to the tests so I'm just submitting a
version 2 of the whole patch set.

OK for trunk?

2017-08-22  Daniel Santos  <daniel.santos@pobox.com>

	* config/i386/i386.h (ix86_frame::stack_realign_allocate_offset):
	Remove field.
	(ix86_frame::stack_realign_allocate): New field.
	(struct machine_frame_state): Modify comments.
	(machine_frame_state::sp_realigned_fp_end): New field.
	* config/i386/i386.c (ix86_compute_frame_layout): Rework stack frame
	layout calculation.
	(sp_valid_at): Add assertion to assure no attempt to access invalid
	offset of a realigned stack.
	(fp_valid_at): Likewise.
	(choose_baseaddr): Modify comments.
	(ix86_emit_outlined_ms2sysv_save): Adjust to changes in
	ix86_expand_prologue.
	(ix86_expand_prologue): Modify stack realignment and allocation.
	(ix86_expand_epilogue): Modify comments.

2017-08-22  Daniel Santos  <daniel.santos@pobox.com>

	* gcc.target/i386/pr80969-1.c: New testcase.
	* gcc.target/i386/pr80969-2a.c: Likewise.
	* gcc.target/i386/pr80969-2.c: Likewise.
	* gcc.target/i386/pr80969-3.c: Likewise.
	* gcc.target/i386/pr80969-4a.c: Likewise.
	* gcc.target/i386/pr80969-4b.c: Likewise.
	* gcc.target/i386/pr80969-4.c: Likewise.
	* gcc.target/i386/pr80969-4.h: New header common to pr80969-4*.c


Thanks,
Daniel


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