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[Bug target/68986] [5 Regression] internal compiler error: Segmentation fault
- From: "hjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 01 Feb 2016 20:21:27 +0000
- Subject: [Bug target/68986] [5 Regression] internal compiler error: Segmentation fault
- Auto-submitted: auto-generated
- References: <bug-68986-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68986
--- Comment #19 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon Feb 1 20:20:56 2016
New Revision: 233046
URL: https://gcc.gnu.org/viewcvs?rev=233046&root=gcc&view=rev
Log:
Update preferred stack boundary in ix86_update_stack_boundary
__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.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr68986-1.c
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr68986-2.c
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr68986-3.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/i386.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog