From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 9 Dec 2015 09:34:59 +0000 (+0000)
Subject: Fix PR ipa/68790
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=762aef84a20e889080b6b2f5210a0f589013b21f;p=thirdparty%2Fgcc.git

Fix PR ipa/68790

	PR ipa/68790
	* ipa-icf.c (sem_function::param_used_p): Return true
	if ipa_node_params_sum equals to NULL.
	* gcc.dg/ipa/pr68790.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231446 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a3813b7cd01b..f465e22c675e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-12-09  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/68790
+	* ipa-icf.c (sem_function::param_used_p): Return true
+	if ipa_node_params_sum equals to NULL.
+
 2015-12-09  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/68583
diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
index 0029a48a61b1..889a07de697a 100644
--- a/gcc/ipa-icf.c
+++ b/gcc/ipa-icf.c
@@ -544,7 +544,7 @@ bool
 sem_function::param_used_p (unsigned int i)
 {
   if (ipa_node_params_sum == NULL)
-    return false;
+    return true;
 
   struct ipa_node_params *parms_info = IPA_NODE_REF (get_node ());
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 68d9a2dcff41..1b017b760127 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-09  Martin Liska  <mliska@suse.cz>
+
+	* gcc.dg/ipa/pr68790.c: New test.
+
 2015-12-08  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR ipa/61886
diff --git a/gcc/testsuite/gcc.dg/ipa/pr68790.c b/gcc/testsuite/gcc.dg/ipa/pr68790.c
new file mode 100644
index 000000000000..258c00438670
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/pr68790.c
@@ -0,0 +1,40 @@
+/* { dg-do run } */
+/* { dg-options "-O0 -fipa-icf -fdump-ipa-icf"  } */
+
+struct S
+{
+  int a;
+};
+
+int
+foo3 (struct S x, struct S y, struct S z)
+{
+  if (z.a != 9)
+    __builtin_abort ();
+  return 0;
+}
+
+int
+bar3 (struct S x, struct S y, struct S z)
+{
+  return foo3 (y, x, z);
+}
+
+int
+baz3 (struct S x, struct S y, struct S z)
+{
+  return foo3 (y, z, x);
+}
+
+int
+main (void)
+{
+  struct S
+    a = { 3 },
+    b = { 6 },
+    c = { 9 };
+
+  return bar3 (b, a, c);
+}
+
+/* { dg-final { scan-ipa-dump "Equal symbols: 0" "icf"  } } */