Hello.
Following patch skips static {c,d}tors in IPA ICF.
Patch can bootstrap and survives regtests on x86_64-linux-gnu.
Ready for trunk?
Thanks,
Martin
>From 7a5748b38e173702c88b97420d6b4d8969ae7e85 Mon Sep 17 00:00:00 2001
From: marxin <mli...@suse.cz>
Date: Mon, 21 Mar 2016 13:51:32 +0100
Subject: [PATCH] Skip static ctors/dtors in IPA ICF (PR ipa/70306)
gcc/testsuite/ChangeLog:
2016-03-21 Martin Liska <mli...@suse.cz>
* gcc.dg/ipa/pr70306.c: New test.
gcc/ChangeLog:
2016-03-21 Martin Liska <mli...@suse.cz>
* ipa-icf.c (sem_function::parse): Skip static
constructors and destructors.
---
gcc/ipa-icf.c | 5 +++++
gcc/testsuite/gcc.dg/ipa/pr70306.c | 45 ++++++++++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/ipa/pr70306.c
diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
index d82eb87..aa6589c 100644
--- a/gcc/ipa-icf.c
+++ b/gcc/ipa-icf.c
@@ -1697,6 +1697,11 @@ sem_function::parse (cgraph_node *node, bitmap_obstack *stack)
if (lookup_attribute_by_prefix ("omp ", DECL_ATTRIBUTES (node->decl)) != NULL)
return NULL;
+ /* PR ipa/70306. */
+ if (DECL_STATIC_CONSTRUCTOR (node->decl)
+ || DECL_STATIC_DESTRUCTOR (node->decl))
+ return NULL;
+
sem_function *f = new sem_function (node, 0, stack);
f->init ();
diff --git a/gcc/testsuite/gcc.dg/ipa/pr70306.c b/gcc/testsuite/gcc.dg/ipa/pr70306.c
new file mode 100644
index 0000000..be18208
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/pr70306.c
@@ -0,0 +1,45 @@
+/* { dg-options "-O2 -fdump-ipa-icf" } */
+/* { dg-do run } */
+
+int ctor_counter = 1;
+int dtor_counter;
+
+__attribute__((constructor))
+void A()
+{
+ ctor_counter++;
+}
+
+__attribute__((destructor))
+void B()
+{
+ if (dtor_counter == 0)
+ __builtin_abort ();
+
+ dtor_counter--;
+}
+
+__attribute__((constructor))
+static void C() {
+ ctor_counter++;
+}
+
+__attribute__((destructor))
+static void D() {
+ if (dtor_counter == 0)
+ __builtin_abort ();
+
+ dtor_counter--;
+}
+
+int main()
+{
+ if (ctor_counter != 3)
+ __builtin_abort ();
+
+ dtor_counter = 2;
+
+ return 0;
+}
+
+/* { dg-final { scan-ipa-dump "Equal symbols: 0" "icf" } } */
--
2.7.1
