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!345 [PGO kernel] Add fkernel-pgo option to support PGO kernel compilation.

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From: @xiongzhou4 
Reviewed-by: @li-yancheng 
Signed-off-by: @li-yancheng
This commit is contained in:
openeuler-ci-bot 2023-09-13 06:25:39 +00:00 committed by Gitee
commit 112bf40092
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GPG Key ID: 173E9B9CA92EEF8F
2 changed files with 63 additions and 1 deletions
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57
Add-fkernel-pgo-option-to-support-PGO-kernel.patch Normal file
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@ -0,0 +1,57 @@
From 284f9002e1a365fd1658b01763292811e3acb281 Mon Sep 17 00:00:00 2001
From: c00416232 <chenxiaobo5@huawei.com>
Date: Wed, 13 Sep 2023 11:25:00 +0800
Subject: [PATCH] [PGO kernel] Add fkernel-pgo option to support PGO kernel
compilation.
If specified, disable TLS setting of instrumentation variables in
gcc/tree-profile.c, as kernel does not support TLS.
---
gcc/common.opt | 4 ++++
gcc/tree-profile.c | 8 ++++++--
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/gcc/common.opt b/gcc/common.opt
index 37835d5c0..2cfe5269f 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -2002,6 +2002,10 @@ fprofile-generate=
Common Joined RejectNegative
Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=.
+fkernel-pgo
+Common Report Var(flag_kernel_pgo) Optimization Init(0)
+Disable TLS setting of instrumentation variables to support PGO kernel compilation in -fprofile-generate, as kernel does not support TLS.
+
fprofile-use
Common Var(flag_profile_use)
Enable common options for performing profile feedback directed optimizations.
diff --git a/gcc/tree-profile.c b/gcc/tree-profile.c
index a49ec37f8..c802ad08a 100644
--- a/gcc/tree-profile.c
+++ b/gcc/tree-profile.c
@@ -91,7 +91,9 @@ init_ic_make_global_vars (void)
TREE_STATIC (ic_void_ptr_var) = 1;
DECL_ARTIFICIAL (ic_void_ptr_var) = 1;
DECL_INITIAL (ic_void_ptr_var) = NULL;
- if (targetm.have_tls)
+ /* Disable TLS setting when compiling kernel in -fprofile-generate,
+ as kernel does not support TLS. */
+ if (targetm.have_tls && !flag_kernel_pgo)
set_decl_tls_model (ic_void_ptr_var, decl_default_tls_model (ic_void_ptr_var));
gcov_type_ptr = build_pointer_type (get_gcov_type ());
@@ -108,7 +110,9 @@ init_ic_make_global_vars (void)
TREE_STATIC (ic_gcov_type_ptr_var) = 1;
DECL_ARTIFICIAL (ic_gcov_type_ptr_var) = 1;
DECL_INITIAL (ic_gcov_type_ptr_var) = NULL;
- if (targetm.have_tls)
+ /* Disable TLS setting when compiling kernel in -fprofile-generate,
+ as kernel does not support TLS. */
+ if (targetm.have_tls && !flag_kernel_pgo)
set_decl_tls_model (ic_gcov_type_ptr_var, decl_default_tls_model (ic_gcov_type_ptr_var));
}
--
2.27.0

7
gcc.spec
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@ -41,7 +41,7 @@ Version: 7.3.0
# number 2020033101 meaning the openEuler 20.03 release date plus 01 to
# replace DATE and will never change it in the future.
%global openEulerDATE 2020033101
Release: %{openEulerDATE}.51
Release: %{openEulerDATE}.52
License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
Group: Development/Languages
#Source0: hcc-aarch64-linux-release.tar.bz2
@ -98,6 +98,7 @@ Patch41: PR-c-83227-C-17-ICE-with-init-list-derived.patch
Patch42: Remove-_GLIBCXX_USE_INT128-autoconf-macro.patch
Patch43: Add-bolt-linker-plugin.patch
Patch44: Enable-BOLT-linker-plugin-on-aarch64.patch
Patch45: Add-fkernel-pgo-option-to-support-PGO-kernel.patch
#AutoReqProv: off
AutoReq: true
@ -586,6 +587,7 @@ package or when debugging this package.
%patch42 -p1
%patch43 -p1
%patch44 -p1
%patch45 -p1
%if 0%{?_enable_debug_packages}
cat > split-debuginfo.sh <<\EOF
@ -3346,6 +3348,9 @@ fi
%changelog
* Wed Sep 13 2023 Xiong Zhou <xiongzhou4@huawei.com> -7.3.0-2020033101.52
- Add fkernel-pgo option to support PGO kernel compilation.
* Wed Dec 07 2022 konglidong <konglidong@uniontech.com> -7.3.0-2020033101.51
- fix bad macro expansion in changelog