https://bugs.gentoo.org/677724

Apply file-specific target-specific optimisation to constructors and
destructors. Fixes leaking of target-specific options from one unit
to another. On firefox this change fixes -mavx2 leak from files guarded
by CPU flag detection into other files.

From 332446ac24e5b37f441f7c9cb0b97fc36f9f0aa3 Mon Sep 17 00:00:00 2001
From: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 15 Dec 2018 10:31:37 +0000
Subject: [PATCH] 	* ipa.c (cgraph_build_static_cdtor_1): Add
 OPTIMIZATION and TARGET 	parameters. 	(cgraph_build_static_cdtor):
 Update. 	(build_cdtor): Use OPTIMIZATION and TARGET of the first real
 cdtor 	callsed.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@267168 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ipa.c     | 12 +++++++++---

--- a/gcc/ipa.c
+++ b/gcc/ipa.c
@@ -831,7 +831,9 @@ ipa_discover_variable_flags (void)
    be produced. */
 
 static void
-cgraph_build_static_cdtor_1 (char which, tree body, int priority, bool final)
+cgraph_build_static_cdtor_1 (char which, tree body, int priority, bool final,
+			     tree optimization,
+			     tree target)
 {
   static int counter = 0;
   char which_buf[16];
@@ -862,6 +864,8 @@ cgraph_build_static_cdtor_1 (char which, tree body, int priority, bool final)
 
   TREE_STATIC (decl) = 1;
   TREE_USED (decl) = 1;
+  DECL_FUNCTION_SPECIFIC_OPTIMIZATION (decl) = optimization;
+  DECL_FUNCTION_SPECIFIC_TARGET (decl) = target;
   DECL_ARTIFICIAL (decl) = 1;
   DECL_IGNORED_P (decl) = 1;
   DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1;
@@ -911,7 +915,7 @@ cgraph_build_static_cdtor_1 (char which, tree body, int priority, bool final)
 void
 cgraph_build_static_cdtor (char which, tree body, int priority)
 {
-  cgraph_build_static_cdtor_1 (which, body, priority, false);
+  cgraph_build_static_cdtor_1 (which, body, priority, false, NULL, NULL);
 }
 
 /* When target does not have ctors and dtors, we call all constructor
@@ -993,7 +997,9 @@ build_cdtor (bool ctor_p, const vec<tree> &cdtors)
       gcc_assert (body != NULL_TREE);
       /* Generate a function to call all the function of like
 	 priority.  */
-      cgraph_build_static_cdtor_1 (ctor_p ? 'I' : 'D', body, priority, true);
+      cgraph_build_static_cdtor_1 (ctor_p ? 'I' : 'D', body, priority, true,
+				   DECL_FUNCTION_SPECIFIC_OPTIMIZATION (cdtors[0]),
+				   DECL_FUNCTION_SPECIFIC_TARGET (cdtors[0]));
     }
 }
 
-- 
2.20.1