From 60c5fdc5d5bab2d26a43813ffebda247c8dd1fce Mon Sep 17 00:00:00 2001
From: mliska <mliska@suse.cz>
Date: Fri, 27 Feb 2015 21:49:46 +0100
Subject: [PATCH 1/4] ICF is more strict about non-common function and var
 attributes.

gcc/ChangeLog:

2015-02-28  Martin Liska  <mliska@suse.cz>
	    Jan Hubicka   <hubicka@ucw.cz>

	* ipa-icf-gimple.c (func_checker::compare_variable_decl):
	Validate variable alignment.
	* ipa-icf.c (sem_function::equals_private): Be more precise
	about non-common function attributes.
	(sem_variable::equals): Likewise.

gcc/testsuite/ChangeLog:

2015-03-01  Martin Liska  <mliska@suse.cz>
	    Jan Hubicka   <hubicka@ucw.cz>

	* gcc.target/i386/stackalign/longlong-2.c: Omit ICF.
---
 gcc/ipa-icf-gimple.c                               |  3 ++
 gcc/ipa-icf.c                                      | 35 ++++++++++++++++++++++
 .../gcc.target/i386/stackalign/longlong-2.c        |  2 +-
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/gcc/ipa-icf-gimple.c b/gcc/ipa-icf-gimple.c
index 53d2c38..cbeb795 100644
--- a/gcc/ipa-icf-gimple.c
+++ b/gcc/ipa-icf-gimple.c
@@ -575,6 +575,9 @@ func_checker::compare_variable_decl (tree t1, tree t2)
   if (t1 == t2)
     return true;
 
+  if (DECL_ALIGN (t1) != DECL_ALIGN (t2))
+    return return_false_with_msg ("alignments are different");
+
   if (DECL_HARD_REGISTER (t1) != DECL_HARD_REGISTER (t2))
     return return_false_with_msg ("DECL_HARD_REGISTER are different");
 
diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
index 5d50b6f..92133fc 100644
--- a/gcc/ipa-icf.c
+++ b/gcc/ipa-icf.c
@@ -619,6 +619,30 @@ sem_function::equals_private (sem_item *item,
     if (!compare_phi_node (bb_sorted[i]->bb, m_compared_func->bb_sorted[i]->bb))
       return return_false_with_msg ("PHI node comparison returns false");
 
+  /* Compare special function DECL attributes.  */
+  if (DECL_FUNCTION_PERSONALITY (decl) != DECL_FUNCTION_PERSONALITY (item->decl))
+    return return_false_with_msg ("function personalities are different");
+
+  if (DECL_DISREGARD_INLINE_LIMITS (decl) != DECL_DISREGARD_INLINE_LIMITS (item->decl))
+    return return_false_with_msg ("DECL_DISREGARD_INLINE_LIMITS are different");
+
+  if (DECL_DECLARED_INLINE_P (decl) != DECL_DECLARED_INLINE_P (item->decl))
+    return return_false_with_msg ("inline attributes are different");
+
+  if (DECL_IS_OPERATOR_NEW (decl) != DECL_IS_OPERATOR_NEW (item->decl))
+    return return_false_with_msg ("operator new flags are different");
+
+  if (DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl)
+       != DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (item->decl))
+    return return_false_with_msg ("intrument function entry exit "
+				  "attributes are different");
+
+  if (DECL_NO_LIMIT_STACK (decl) != DECL_NO_LIMIT_STACK (item->decl))
+    return return_false_with_msg ("no stack limit attributes are different");
+
+  if (flags_from_decl_or_type (decl) != flags_from_decl_or_type (item->decl))
+    return return_false_with_msg ("decl_or_type flags are different");
+
   return result;
 }
 
@@ -1280,6 +1304,17 @@ sem_variable::equals (sem_item *item,
   if (!ctor || !v->ctor)
     return return_false_with_msg ("ctor is missing for semantic variable");
 
+  if (DECL_IN_CONSTANT_POOL (decl)
+      && (DECL_IN_CONSTANT_POOL (item->decl)
+	  || item->node->address_matters_p ()))
+    return return_false_with_msg ("constant pool");
+
+  if (DECL_IN_TEXT_SECTION (decl) != DECL_IN_TEXT_SECTION (item->decl))
+    return return_false_with_msg ("text section");
+
+  if (DECL_TLS_MODEL (decl) || DECL_TLS_MODEL (item->decl))
+    return return_false_with_msg ("TLS model");
+
   return sem_variable::equals (ctor, v->ctor);
 }
 
diff --git a/gcc/testsuite/gcc.target/i386/stackalign/longlong-2.c b/gcc/testsuite/gcc.target/i386/stackalign/longlong-2.c
index 6ea83f9..d52b9d1 100644
--- a/gcc/testsuite/gcc.target/i386/stackalign/longlong-2.c
+++ b/gcc/testsuite/gcc.target/i386/stackalign/longlong-2.c
@@ -1,6 +1,6 @@
 /* { dg-do compile  { target { ! *-*-darwin* } } } */
 /* { dg-require-effective-target ia32 } */
-/* { dg-options "-O2 -mpreferred-stack-boundary=2" } */
+/* { dg-options "-O2 -mpreferred-stack-boundary=2 -fno-ipa-icf" } */
 /* { dg-final { scan-assembler-times "and\[lq\]?\[^\\n\]*-8,\[^\\n\]*sp" 2 } } */ 
 /* { dg-final { scan-assembler-times "and\[lq\]?\[^\\n\]*-16,\[^\\n\]*sp" 2 } } */ 
 
-- 
2.1.2

