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Re: [PATCH] Fix PR ipa/65087
- From: Martin Liška <mliska at suse dot cz>
- To: Jan Hubicka <hubicka at ucw dot cz>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, Martin Jambor <mjambor at suse dot cz>
- Date: Tue, 03 Mar 2015 10:31:17 +0100
- Subject: Re: [PATCH] Fix PR ipa/65087
- Authentication-results: sourceware.org; auth=none
- References: <54F49553 dot 7030302 at suse dot cz> <20150302172004 dot GC67273 at kam dot mff dot cuni dot cz>
On 03/02/2015 06:20 PM, Jan Hubicka wrote:
Hello.
Following one line patch is fix for PR ipa/65087. No regression has been
seen on x86_64-linux-pc.
OK, it won't happend large programs, but can you arrange its execute method to
return TODO_remove_functions only if some merging actually happened?
Patch is preapproved with this change.
Honza
Yes.
Attached patch is the one I've just installed, where TODO_remove_functions is returned
just for cases where we merge an item.
Thanks,
Martin
Ready for trunk?
Thanks,
Martin
>From f39be56c66387c698546c498550d38512ddeb477 Mon Sep 17 00:00:00 2001
From: mliska <mliska@suse.cz>
Date: Mon, 2 Mar 2015 16:56:42 +0100
Subject: [PATCH] Fix PR ipa/65087.
gcc/ChangeLog:
2015-03-02 Martin Liska <mliska@suse.cz>
Martin Jambor <mjambor@suse.cz>
PR ipa/65087
* ipa-icf.c: Add TODO_remove_functions to the IPA pass.
---
gcc/ipa-icf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
index 31fcbec..56f59a9 100644
--- a/gcc/ipa-icf.c
+++ b/gcc/ipa-icf.c
@@ -3049,7 +3049,7 @@ const pass_data pass_data_ipa_icf =
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- 0, /* todo_flags_finish */
+ TODO_remove_functions, /* todo_flags_finish */
};
class pass_ipa_icf : public ipa_opt_pass_d
--
2.1.2
>From 3a3bc6bda4ab1c47e8fa74e9a46cbd7abe612cc1 Mon Sep 17 00:00:00 2001
From: mliska <mliska@suse.cz>
Date: Mon, 2 Mar 2015 16:56:42 +0100
Subject: [PATCH] Fix PR ipa/65087.
gcc/ChangeLog:
2015-03-02 Martin Liska <mliska@suse.cz>
Martin Jambor <mjambor@suse.cz>
PR ipa/65087
* ipa-icf.c (sem_item_optimizer::execute): Change function
return value to boolean.
(sem_item_optimizer::merge_classes): Likewise.
(ipa_icf_driver): Return TODO_remove_functions in case there's
a merge operation processed.
* ipa-icf.h: Change function return value to boolean.
---
gcc/ipa-icf.c | 26 ++++++++++++++++++--------
gcc/ipa-icf.h | 11 +++++++----
2 files changed, 25 insertions(+), 12 deletions(-)
diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
index 31fcbec..9cdd73e 100644
--- a/gcc/ipa-icf.c
+++ b/gcc/ipa-icf.c
@@ -2167,9 +2167,11 @@ sem_item_optimizer::filter_removed_items (void)
m_items.safe_push (filtered[i]);
}
-/* Optimizer entry point. */
+/* Optimizer entry point which returns true in case it processes
+ a merge operation. True is returned if there's a merge operation
+ processed. */
-void
+bool
sem_item_optimizer::execute (void)
{
filter_removed_items ();
@@ -2214,10 +2216,12 @@ sem_item_optimizer::execute (void)
process_cong_reduction ();
dump_cong_classes ();
verify_classes ();
- merge_classes (prev_class_count);
+ bool merged_p = merge_classes (prev_class_count);
if (dump_file && (dump_flags & TDF_DETAILS))
symtab_node::dump_table (dump_file);
+
+ return merged_p;
}
/* Function responsible for visiting all potential functions and
@@ -2870,9 +2874,10 @@ sem_item_optimizer::dump_cong_classes (void)
/* After reduction is done, we can declare all items in a group
to be equal. PREV_CLASS_COUNT is start number of classes
- before reduction. */
+ before reduction. True is returned if there's a merge operation
+ processed. */
-void
+bool
sem_item_optimizer::merge_classes (unsigned int prev_class_count)
{
unsigned int item_count = m_items.length ();
@@ -2882,6 +2887,8 @@ sem_item_optimizer::merge_classes (unsigned int prev_class_count)
unsigned int non_singular_classes_count = 0;
unsigned int non_singular_classes_sum = 0;
+ bool merged_p = false;
+
for (hash_table<congruence_class_group_hash>::iterator it = m_classes.begin ();
it != m_classes.end (); ++it)
for (unsigned int i = 0; i < (*it)->classes.length (); i++)
@@ -2952,9 +2959,12 @@ sem_item_optimizer::merge_classes (unsigned int prev_class_count)
alias->dump_to_file (dump_file);
}
- source->merge (alias);
+ if (source->merge (alias))
+ merged_p = true;
}
}
+
+ return merged_p;
}
/* Dump function prints all class members to a FILE with an INDENT. */
@@ -3031,12 +3041,12 @@ ipa_icf_driver (void)
{
gcc_assert (optimizer);
- optimizer->execute ();
+ bool merged_p = optimizer->execute ();
delete optimizer;
optimizer = NULL;
- return 0;
+ return merged_p ? TODO_remove_functions : 0;
}
const pass_data pass_data_ipa_icf =
diff --git a/gcc/ipa-icf.h b/gcc/ipa-icf.h
index e3582db..1481353 100644
--- a/gcc/ipa-icf.h
+++ b/gcc/ipa-icf.h
@@ -470,8 +470,10 @@ public:
read-only variables that can be merged. */
void parse_funcs_and_vars (void);
- /* Optimizer entry point. */
- void execute (void);
+ /* Optimizer entry point which returns true in case it processes
+ a merge operation. True is returned if there's a merge operation
+ processed. */
+ bool execute (void);
/* Dump function. */
void dump (void);
@@ -545,8 +547,9 @@ private:
/* After reduction is done, we can declare all items in a group
to be equal. PREV_CLASS_COUNT is start number of classes
- before reduction. */
- void merge_classes (unsigned int prev_class_count);
+ before reduction. True is returned if there's a merge operation
+ processed. */
+ bool merge_classes (unsigned int prev_class_count);
/* Adds a newly created congruence class CLS to worklist. */
void worklist_push (congruence_class *cls);
--
2.1.2