Update preferred stack boundary in ix86_update_stack_boundaryhjl/pr68986/gcc-5-branch

__tls_get_addr must be called with 16-byte aligned stack, which is
guaranted by setting preferred_stack_boundary to 128 bits.  Preferred
stack boundary adjustment for __tls_get_addr should be done in
ix86_update_stack_boundary, not ix86_compute_frame_layout Also
there is no need to over-align stack for __tls_get_addr and function
with __tls_get_addr call isn't a leaf function.

gcc/

	Backport from mainline
	PR target/68986
	* config/i386/i386.c (ix86_compute_frame_layout): Move stack
	alignment adjustment to ...
	(ix86_update_stack_boundary): Here.  Don't over-align stack nor
	change stack_alignment_needed for __tls_get_addr.
	(ix86_finalize_stack_realign_flags): Use stack_alignment_needed
	if __tls_get_addr is called.

gcc/testsuite/

	Backport from mainline
	PR target/68986
	* gcc.target/i386/pr68986-1.c: New test.
	* gcc.target/i386/pr68986-2.c: Likewise.
	* gcc.target/i386/pr68986-3.c: Likewise.

0 files changed, 0 insertions, 0 deletions