From cb13264f07c419149b86e19c2187729bda8dd47d Mon Sep 17 00:00:00 2001
From: jiez <jiez@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 23 Jul 2010 14:47:46 +0000
Subject: [PATCH 2/6] PR target/44290 * attribs.c (decl_attributes): Insert "noinline" and "noclone" if "naked". * tree-sra.c (ipa_sra_preliminary_function_checks): Return false if ! tree_versionable_function_p.

	testsuite/
	PR target/44290
	* gcc.dg/pr44290-1.c: New test.
	* gcc.dg/pr44290-2.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@162466 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/attribs.c                    |   13 +++++++++++++
 gcc/testsuite/gcc.dg/pr44290-1.c |   18 ++++++++++++++++++
 gcc/testsuite/gcc.dg/pr44290-2.c |   24 ++++++++++++++++++++++++
 gcc/tree-sra.c                   |    7 +++++++
 4 files changed, 62 insertions(+), 0 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/pr44290-1.c
 create mode 100644 gcc/testsuite/gcc.dg/pr44290-2.c

diff --git a/gcc/attribs.c b/gcc/attribs.c
index 4d91a0d..2e06608 100644
--- a/gcc/attribs.c
+++ b/gcc/attribs.c
@@ -278,6 +278,19 @@ decl_attributes (tree *node, tree attributes, int flags)
 	TREE_VALUE (cur_attr) = chainon (opts, TREE_VALUE (cur_attr));
     }
 
+  /* A "naked" function attribute implies "noinline" and "noclone" for
+     those targets that support it.  */
+  if (TREE_CODE (*node) == FUNCTION_DECL
+      && lookup_attribute_spec (get_identifier ("naked"))
+      && lookup_attribute ("naked", attributes) != NULL)
+    {
+      if (lookup_attribute ("noinline", attributes) == NULL)
+	attributes = tree_cons (get_identifier ("noinline"), NULL, attributes);
+
+      if (lookup_attribute ("noclone", attributes) == NULL)
+	attributes = tree_cons (get_identifier ("noclone"),  NULL, attributes);
+    }
+
   targetm.insert_attributes (*node, &attributes);
 
   for (a = attributes; a; a = TREE_CHAIN (a))
diff --git a/gcc/testsuite/gcc.dg/pr44290-1.c b/gcc/testsuite/gcc.dg/pr44290-1.c
new file mode 100644
index 0000000..071a271
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr44290-1.c
@@ -0,0 +1,18 @@
+/* { dg-do compile { target arm*-*-* avr-*-* mcore-*-* rx-*-* spu-*-* } } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+static void __attribute__((naked))
+foo(void *from, void *to)
+{
+  asm volatile("dummy"::"r"(from), "r"(to));
+}
+
+unsigned int fie[2];
+
+void fum(void *to)
+{
+  foo(fie, to);
+}
+
+/* { dg-final { scan-tree-dump "foo \\\(void \\\* from, void \\\* to\\\)" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
diff --git a/gcc/testsuite/gcc.dg/pr44290-2.c b/gcc/testsuite/gcc.dg/pr44290-2.c
new file mode 100644
index 0000000..1951a51
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr44290-2.c
@@ -0,0 +1,24 @@
+/* { dg-do compile { target arm*-*-* avr-*-* mcore-*-* rx-*-* spu-*-* } } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+static unsigned long __attribute__((naked))
+foo (unsigned long base)
+{
+  asm volatile ("dummy");
+}
+unsigned long
+bar (void)
+{
+  static int start, set;
+
+  if (!set)
+    {
+      set = 1;
+      start = foo (0);
+    }
+
+  return foo (start);
+}
+
+/* { dg-final { scan-tree-dump "foo \\\(long unsigned int base\\\)" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c
index 6a5b577..ea37d97 100644
--- a/gcc/tree-sra.c
+++ b/gcc/tree-sra.c
@@ -4126,6 +4126,13 @@ modify_function (struct cgraph_node *node, ipa_parm_adjustment_vec adjustments)
 static bool
 ipa_sra_preliminary_function_checks (struct cgraph_node *node)
 {
+  if (!tree_versionable_function_p (current_function_decl))
+    {
+      if (dump_file)
+	fprintf (dump_file, "Function isn't allowed to be versioned.\n");
+      return false;
+    }
+
   if (!cgraph_node_can_be_local_p (node))
     {
       if (dump_file)
-- 
1.7.4