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[Bug target/82499] x86: small stack initial adjustments could use push
- 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, 16 Apr 2018 18:43:28 +0000
- Subject: [Bug target/82499] x86: small stack initial adjustments could use push
- Auto-submitted: auto-generated
- References: <bug-82499-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82499
--- Comment #6 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon Apr 16 18:42:57 2018
New Revision: 259408
URL: https://gcc.gnu.org/viewcvs?rev=259408&root=gcc&view=rev
Log:
i386: Move struct ix86_frame to machine_function
Make ix86_frame available to i386 code generation. This is needed to
backport the patch set of -mindirect-branch= to mitigate variant #2 of
the speculative execution vulnerabilities on x86 processors identified
by CVE-2017-5715, aka Spectre.
Backport from mainline
2017-10-13 H.J. Lu <hongjiu.lu@intel.com>
PR target/82499
* config/i386/i386.h (ix86_red_zone_size): New.
2017-06-01 Bernd Edlinger <bernd.edlinger@hotmail.de>
* config/i386/i386.c (ix86_frame): Moved to ...
* config/i386/i386.h (ix86_frame): Here.
(machine_function): Add frame.
* config/i386/i386.c (ix86_compute_frame_layout): Repace the
frame argument with &cfun->machine->frame.
(ix86_can_use_return_insn_p): Don't pass &frame to
ix86_compute_frame_layout. Copy frame from cfun->machine->frame.
(ix86_can_eliminate): Likewise.
(ix86_expand_prologue): Likewise.
(ix86_expand_epilogue): Likewise.
(ix86_expand_split_stack_prologue): Likewise.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/i386.c
branches/gcc-6-branch/gcc/config/i386/i386.h