[Sync] Add attribute hot judgement for INLINE_HINT_known_hot hint.

We set up INLINE_HINT_known_hot hint only when we have profile feedback,
now add function attribute judgement for it, when both caller and callee
have __attribute__((hot)), we will also set up INLINE_HINT_known_hot hint
for it.

With this patch applied,
ADL Multi-copy:    538.imagic_r  16.7%
ICX Multi-copy:    538.imagic_r  15.2%
CLX Multi-copy:    538.imagic_r  12.7%
Znver3 Multi-copy: 538.imagic_r  10.6%
Arm Multi-copy:    538.imagic_r  13.4%

gcc/ChangeLog

	* ipa-inline-analysis.cc (do_estimate_edge_time): Add function attribute
	judgement for INLINE_HINT_known_hot hint.

gcc/testsuite/ChangeLog:

	* gcc.dg/ipa/inlinehint-6.c: New test.

0003-Add-attribute-hot-judgement-for-INLINE_HINT_known_ho.patch

@@ -0,0 +1,124 @@
+From 355eb8e20327242442d139fb052d3a3befde3dd7 Mon Sep 17 00:00:00 2001
+From: "Cui,Lili" <lili.cui@intel.com>
+Date: Tue, 1 Nov 2022 09:16:49 +0800
+Subject: [PATCH] Add attribute hot judgement for INLINE_HINT_known_hot
+ hint.
+
+We set up INLINE_HINT_known_hot hint only when we have profile feedback,
+now add function attribute judgement for it, when both caller and callee
+have __attribute__((hot)), we will also set up INLINE_HINT_known_hot hint
+for it.
+
+With this patch applied,
+ADL Multi-copy:    538.imagic_r  16.7%
+ICX Multi-copy:    538.imagic_r  15.2%
+CLX Multi-copy:    538.imagic_r  12.7%
+Znver3 Multi-copy: 538.imagic_r  10.6%
+Arm Multi-copy:    538.imagic_r  13.4%
+
+gcc/ChangeLog
+
+	* ipa-inline-analysis.cc (do_estimate_edge_time): Add function attribute
+	judgement for INLINE_HINT_known_hot hint.
+
+gcc/testsuite/ChangeLog:
+
+	* gcc.dg/ipa/inlinehint-6.c: New test.
+---
+ gcc/ipa-inline-analysis.cc              | 13 ++++---
+ gcc/testsuite/gcc.dg/ipa/inlinehint-6.c | 47 +++++++++++++++++++++++++
+ 2 files changed, 56 insertions(+), 4 deletions(-)
+ create mode 100644 gcc/testsuite/gcc.dg/ipa/inlinehint-6.c
+
+diff --git a/gcc/ipa-inline-analysis.cc b/gcc/ipa-inline-analysis.cc
+index 11d8d09ee..16ac24cfc 100644
+--- a/gcc/ipa-inline-analysis.cc
++++ b/gcc/ipa-inline-analysis.cc
+@@ -48,6 +48,7 @@ along with GCC; see the file COPYING3.  If not see
+ #include "ipa-utils.h"
+ #include "cfgexpand.h"
+ #include "gimplify.h"
++#include "attribs.h"
+ 
+ /* Cached node/edge growths.  */
+ fast_call_summary<edge_growth_cache_entry *, va_heap> *edge_growth_cache = NULL;
+@@ -249,15 +250,19 @@ do_estimate_edge_time (struct cgraph_edge *edge, sreal *ret_nonspec_time)
+       hints = estimates.hints;
+     }
+ 
+-  /* When we have profile feedback, we can quite safely identify hot
+-     edges and for those we disable size limits.  Don't do that when
+-     probability that caller will call the callee is low however, since it
++  /* When we have profile feedback or function attribute, we can quite safely
++     identify hot edges and for those we disable size limits.  Don't do that
++     when probability that caller will call the callee is low however, since it
+      may hurt optimization of the caller's hot path.  */
+-  if (edge->count.ipa ().initialized_p () && edge->maybe_hot_p ()
++  if ((edge->count.ipa ().initialized_p () && edge->maybe_hot_p ()
+       && (edge->count.ipa ().apply_scale (2, 1)
+ 	  > (edge->caller->inlined_to
+ 	     ? edge->caller->inlined_to->count.ipa ()
+ 	     : edge->caller->count.ipa ())))
++      || (lookup_attribute ("hot", DECL_ATTRIBUTES (edge->caller->decl))
++	  != NULL
++	 && lookup_attribute ("hot", DECL_ATTRIBUTES (edge->callee->decl))
++	  != NULL))
+     hints |= INLINE_HINT_known_hot;
+ 
+   gcc_checking_assert (size >= 0);
+diff --git a/gcc/testsuite/gcc.dg/ipa/inlinehint-6.c b/gcc/testsuite/gcc.dg/ipa/inlinehint-6.c
+new file mode 100644
+index 000000000..1f3be641c
+--- /dev/null
++++ b/gcc/testsuite/gcc.dg/ipa/inlinehint-6.c
+@@ -0,0 +1,47 @@
++/* { dg-options "-O3 -c -fdump-ipa-inline-details -fno-early-inlining -fno-ipa-cp"  } */
++/* { dg-add-options bind_pic_locally } */
++
++#define size_t long long int
++
++struct A
++{
++  size_t f1, f2, f3, f4;
++};
++struct C
++{
++  struct A a;
++  size_t b;
++};
++struct C x;
++
++__attribute__((hot)) struct C callee (struct A *a, struct C *c)
++{
++  c->a=(*a);
++
++  if((c->b + 7) & 17)
++   {
++      c->a.f1 = c->a.f2 + c->a.f1;
++      c->a.f2 = c->a.f3 - c->a.f2;
++      c->a.f3 = c->a.f2 + c->a.f3;
++      c->a.f4 = c->a.f2 - c->a.f4;
++      c->b = c->a.f2;
++
++    }
++  return *c;
++}
++
++__attribute__((hot)) struct C caller (size_t d, size_t e, size_t f, size_t g, struct C *c)
++{
++  struct A a;
++  a.f1 = 1 + d;
++  a.f2 = e;
++  a.f3 = 12 + f;
++  a.f4 = 68 + g;
++  if (c->b > 0)
++    return callee (&a, c);
++  else
++    return *c;
++}
++
++/* { dg-final { scan-ipa-dump "known_hot"  "inline"  } } */
++
+-- 
+2.31.1
+

gcc.spec

@@ -2,7 +2,7 @@
 %global gcc_major 12
 # Note, gcc_release must be integer, if you want to add suffixes to
 # %%{release}, append them after %%{gcc_release} on Release: line.
-%global gcc_release 4
+%global gcc_release 5
 
 %global _unpackaged_files_terminate_build 0
 %global _performance_build 1
@@ -139,6 +139,7 @@ Provides: gcc(major) = %{gcc_major}
 Patch0: 0000-Version-Set-version-to-12.3.1.patch
 Patch1: 0001-CONFIG-Regenerate-configure-file.patch
 Patch2: 0002-libquadmath-Enable-libquadmath-on-kunpeng.patch
+Patch3: 0003-Add-attribute-hot-judgement-for-INLINE_HINT_known_ho.patch
 
 # On ARM EABI systems, we do want -gnueabi to be part of the
 # target triple.
@@ -609,6 +610,7 @@ not stable, so plugins must be rebuilt any time GCC is updated.
 %patch0 -p1
 %patch1 -p1
 %patch2 -p1
+%patch3 -p1
 
 echo '%{_vendor} %{version}-%{release}' > gcc/DEV-PHASE
 
@@ -2712,6 +2714,10 @@ end
 %doc rpm.doc/changelogs/libcc1/ChangeLog*
 
 %changelog
+* Fri Aug 11 2023 Cui,Lili <lili.cui@intel.com> 12.3.1-5
+- Type:Sync
+- Add attribute hot judgement for INLINE_HINT_known_hot hint.
+
 * Mon Jul 17 2023 huangxiaoquan <huangxiaoquan1@huawei.com> 12.3.1-4
 - Type:SPEC
 - DESC:Enable libquadmath on kunpeng