From: Sandra Loosemore <sandra@codesourcery.com>
Date: Mon, 26 Nov 2018 18:22:19 +0000 (-0500)
Subject: re PR c/57182 (Documentation implies -fprofile-arcs required to create .text.unlikely... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=73d062d1184c1118c20aea50a8e2c32ad2d8e19a;p=gcc.git

re PR c/57182 (Documentation implies -fprofile-arcs required to create .text.unlikely sections)

2018-11-26  Sandra Loosemore  <sandra@codesourcery.com>

	PR c/57182

	gcc/
	* doc/invoke.texi (Optimize Options): Document that
	-freorder-functions also uses "hot" and "cold" attributes.

From-SVN: r266473
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9cffba982b8..d0b61c04cfd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-11-26  Sandra Loosemore  <sandra@codesourcery.com>
+
+	PR c/57182
+	* doc/invoke.texi (Optimize Options): Document that
+	-freorder-functions also uses "hot" and "cold" attributes.
+
 2018-11-26  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/aarch64/aarch64.c (aarch64_mangle_type): Fix typo in comment.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index e70db5521e9..93938ab486b 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -9796,8 +9796,9 @@ subsections @code{.text.hot} for most frequently executed functions and
 the linker so object file format must support named sections and linker must
 place them in a reasonable way.
 
-Also profile feedback must be available to make this option effective.  See
-@option{-fprofile-arcs} for details.
+This option isn't effective unless you either provide profile feedback
+(see @option{-fprofile-arcs} for details) or manually annotate functions with 
+@code{hot} or @code{cold} attributes (@pxref{Common Function Attributes}).
 
 Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.