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Date: Tue, 23 Jul 2024 12:19:15 +0200
From: Jakub Jelinek
To: Kyrylo Tkachov ,
Richard Sandiford ,
Richard Biener
Cc: gcc-patches@gcc.gnu.org
Subject: [wwwdocs] Add aarch64 11.5.0 caveat
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Reply-To: Jakub Jelinek
Errors-To: gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org
Hi!
Richi suggested to mention the PR116029 bug in 11.5.0 caveats as we can't
fix that anymore.
Here is a patch for that, which attempts to describe (my limited
understanding of) the issue.
As TARGET_CPU_generic is now 64, when config.gcc doesn't set
TARGET_CPU_DEFAULT, we end up with TARGET_CPU_DEFAULT
(64 | (AARCH64_CPU_DEFAULT_FLAGS << 6))
which is treated as I think
TARGET_CPU_cortexa34 | ((AARCH64_CPU_DEFAULT_FLAGS | AARCH64_FL_SIMD) << 6))
Ok for wwwdocs?
Jakub
diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html
index e010cd08..26189772 100644
--- a/htdocs/gcc-11/changes.html
+++ b/htdocs/gcc-11/changes.html
@@ -1164,5 +1164,20 @@ known to be fixed in the 11.5 release. This list might not be
complete (that is, it is possible that some PRs that have been fixed
are not listed here).
+Caveats
+
+aarch64
+
+ -
+ Due to a late introduced bug if the compiler is configured without
+ explicit
--with-arch=
, --with=cpu=
and/or
+ --with-tune=
configure options the compiler without
+ explicit -march=
etc. options might act as if asked
+ for cortex-a34
. This can be fixed by appling manually the
+ r12-8060 commit on top
+ of GCC 11.5.0. See PR116029
+ for more details.
+
+