aarch64: Fix streaming-compatible code with -mtrack-speculation [PR113805]

This patch makes -mtrack-speculation work on streaming-compatible
functions.  There were two related issues.  The first is that the
streaming-compatible code was using TB(N)Z unconditionally, whereas
those instructions are not allowed with speculation tracking.
That part can be fixed in a similar way to the recent eh_return
fix (PR112987).

The second issue was that the speculation-tracking pass runs
before some of the conditional branches are inserted.  It isn't
safe to insert the branches any earlier, so the patch instead adds
a second speculation-tracking pass that runs afterwards.  The new
pass is only used for streaming-compatible functions.

The testcase is adapted from call_sm_switch_1.c.

gcc/
	PR target/113805
	* config/aarch64/aarch64-passes.def (pass_late_track_speculation):
	New pass.
	* config/aarch64/aarch64-protos.h (make_pass_late_track_speculation):
	Declare.
	* config/aarch64/aarch64.md (is_call): New attribute.
	(*and<mode>3nr_compare0): Rename to...
	(@aarch64_and<mode>3nr_compare0): ...this.
	* config/aarch64/aarch64-sme.md (aarch64_get_sme_state)
	(aarch64_tpidr2_save, aarch64_tpidr2_restore): Add is_call attributes.
	* config/aarch64/aarch64-speculation.cc: Update file comment to
	describe the new late pass.
	(aarch64_do_track_speculation): Handle is_call insns like other calls.
	(pass_track_speculation): Add an is_late member variable.
	(pass_track_speculation::gate): Run the late pass for streaming-
	compatible functions and the early pass for other functions.
	(make_pass_track_speculation): Update accordingly.
	(make_pass_late_track_speculation): New function.
	* config/aarch64/aarch64.cc (aarch64_gen_test_and_branch): New
	function.
	(aarch64_guard_switch_pstate_sm): Use it.

gcc/testsuite/
	PR target/113805
	* gcc.target/aarch64/sme/call_sm_switch_11.c: New test.

0 files changed, 0 insertions, 0 deletions