Add fkernel-pgo option to support PGO kernel compilation.

Add-fkernel-pgo-option-to-support-PGO-kernel.patch

@@ -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
+

gcc.spec

@@ -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