mirror of
https://github.com/archlinuxarm/PKGBUILDs.git
synced 2024-09-19 22:08:32 +00:00
54 lines
2 KiB
Diff
54 lines
2 KiB
Diff
From 979ae78318c3e37cc0e0579b8d1f05c46bb76e7d Mon Sep 17 00:00:00 2001
|
|
From: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
|
|
Date: Tue, 19 May 2020 20:35:49 +0300
|
|
Subject: [PATCH] meson: Disable GCC's dead store elimination for memory
|
|
zeroing custom new
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Some classes use custom new operator which zeroes memory, however gcc does
|
|
aggressive dead-store elimination which threats all writes to the memory
|
|
before the constructor as "dead stores".
|
|
|
|
For now we disable this optimization.
|
|
|
|
The new operators in question are declared via:
|
|
DECLARE_RZALLOC_CXX_OPERATORS
|
|
DECLARE_LINEAR_ZALLOC_CXX_OPERATORS
|
|
|
|
The issue was found with lto builds, however there is no guarantee that
|
|
it didn't happen with ordinary ones.
|
|
|
|
CC: <mesa-stable@lists.freedesktop.org>
|
|
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/2977
|
|
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/1358
|
|
Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
|
|
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
|
|
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5104>
|
|
(cherry picked from commit 5500a2b7fc558217bbd4c2a966ab6fcadaed8b3b)
|
|
Signed-off-by: Laurent Carlier <lordheavym@gmail.com>
|
|
---
|
|
meson.build | 5 +++++
|
|
1 files changed, 5 insertions(+), 0 deletion(-)
|
|
|
|
diff --git a/meson.build b/meson.build
|
|
index ba4fdb2a59f..434684c8bcc 100644
|
|
--- a/meson.build
|
|
+++ b/meson.build
|
|
@@ -980,6 +980,11 @@ else
|
|
'-fno-math-errno',
|
|
'-fno-trapping-math',
|
|
'-Qunused-arguments',
|
|
+ # Some classes use custom new operator which zeroes memory, however
|
|
+ # gcc does aggressive dead-store elimination which threats all writes
|
|
+ # to the memory before the constructor as "dead stores".
|
|
+ # For now we disable this optimization.
|
|
+ '-flifetime-dse=1',
|
|
]
|
|
# MinGW chokes on format specifiers and I can't get it all working
|
|
if not (cc.get_id() == 'gcc' and host_machine.system() == 'windows')
|
|
--
|
|
2.26.2
|
|
|