re PR lto/52605 (LTO -g ICE when looking up context of VMTs of classes defined within functions)

2012-05-02  Martin Jambor  <mjambor@suse.cz>

	PR lto/52605
	* dwarf2out.c (dwarf2out_decl): Only lookup die representing context
	of a variable when the contect is a function.

	* gcc/testsuite/g++.dg/lto/pr52605_0.C: New test.

From-SVN: r187063

gcc/ChangeLog

+2012-05-02  Martin Jambor  <mjambor@suse.cz>
+
+	PR lto/52605
+	* dwarf2out.c (dwarf2out_decl): Only lookup die representing context
+	of a variable when the contect is a function.
+
 2012-05-02  Michael Matz  <matz@suse.de>
 
 	* coretypes.h (gimple_seq, const_gimple_seq): Typedef as gimple.

gcc/dwarf2out.c

@@ -19122,7 +19122,9 @@ dwarf2out_decl (tree decl)
 	return;
 
       /* For local statics lookup proper context die.  */
-      if (TREE_STATIC (decl) && decl_function_context (decl))
+      if (TREE_STATIC (decl)
+	  && DECL_CONTEXT (decl)
+	  && TREE_CODE (DECL_CONTEXT (decl)) == FUNCTION_DECL)
 	context_die = lookup_decl_die (DECL_CONTEXT (decl));
 
       /* If we are in terse mode, don't generate any DIEs to represent any

gcc/testsuite/ChangeLog

+2012-05-02  Martin Jambor  <mjambor@suse.cz>
+
+	PR lto/52605
+	* g++.dg/lto/pr52605_0.C: New test.
+
 2012-05-02  Kirill Yukhin  <kirill.yukhin@intel.com>
 
 	* gcc.target/i386/hle-cmpxchg-acq-1.c: New.

gcc/testsuite/g++.dg/lto/pr52605_0.C

+// { dg-lto-do link }
+// { dg-lto-options {{-flto -g}} }
+
+extern "C" void abort (void);
+
+class A
+{
+public:
+  virtual int foo (int i);
+};
+
+int A::foo (int i)
+{
+  return i + 1;
+}
+
+int __attribute__ ((noinline,noclone)) get_input(void)
+{
+  return 1;
+}
+
+int main (int argc, char *argv[])
+{
+
+  class B : public A
+  {
+  public:
+    int bar (int i)
+    {
+      return foo (i) + 2;
+    }
+  };
+  class B b;
+
+  if (b.bar (get_input ()) != 4)
+    abort ();
+  return 0;
+}
+