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From 06e86b362f74ba0706fb5d8377f78d24b658c300 Mon Sep 17 00:00:00 2001
From: zhenyu--zhao_admin <zhaozhenyu17@huawei.com>
Date: Sat, 18 May 2024 12:22:23 +0800
Subject: [PATCH] [Bugfix] Autofdo use PMU sampling set num eauals den
---
gcc/final.cc | 2 +-
gcc/tree-cfg.cc | 8 ++++++++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/gcc/final.cc b/gcc/final.cc
index f66c9d155..e4bfceabc 100644
--- a/gcc/final.cc
+++ b/gcc/final.cc
@@ -4604,7 +4604,7 @@ dump_profile_to_elf_sections ()
/* Return if no feedback data. */
if (!flag_profile_use && !flag_auto_profile)
{
- error ("-fauto-bolt should use with -profile-use or -fauto-profile");
+ error ("-fauto-bolt should use with -fprofile-use or -fauto-profile");
return;
}
diff --git a/gcc/tree-cfg.cc b/gcc/tree-cfg.cc
index 05fc45147..48b52f785 100644
--- a/gcc/tree-cfg.cc
+++ b/gcc/tree-cfg.cc
@@ -9741,6 +9741,14 @@ execute_fixup_cfg (void)
/* Same scaling is also done by ipa_merge_profiles. */
profile_count num = node->count;
profile_count den = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count;
+ /* When autofdo uses PMU as the sampling unit, the number of
+ node can not be obtained directly, sometimes it will be zero,
+ but the execution number for function should at least be 1. We
+ set num be den here to make sure the num will not decrease. */
+ if (num == profile_count::zero ().afdo () && den.quality () == profile_quality::AFDO)
+ {
+ num = den;
+ }
bool scale = num.initialized_p () && !(num == den);
auto_bitmap dce_ssa_names;
--
2.33.0
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