2001-08-03  Jakub Jelinek  <jakub@redhat.com>

	* dbxout.c (dbxout_symbol_location): Only set regno for register

	SUBREG.

	* g++.old-deja/g++.other/debug10.C: New testcase.

--- gcc/dbxout.c.jj	Tue Jul 24 20:41:21 2001

+++ gcc/dbxout.c	Fri Aug  3 20:26:17 2001

@@ -2024,8 +2024,10 @@ dbxout_symbol_location (decl, type, suff

 	{

 	  if (REGNO (value) >= FIRST_PSEUDO_REGISTER)

 	    return 0;

+	  regno = REGNO (alter_subreg (home));

 	}

-      regno = REGNO (alter_subreg (home));

+      else

+	alter_subreg (home);

     }

   /* The kind-of-variable letter depends on where

--- gcc/testsuite/g++.old-deja/g++.other/debug10.C.jj	Fri Aug  3 20:31:05 2001

+++ gcc/testsuite/g++.old-deja/g++.other/debug10.C	Fri Aug  3 20:31:12 2001

@@ -0,0 +1,24 @@

+// Build don't link:

+// Special g++ Options: -g -O

+

+struct A

+{

+  int e();

+  A &f(double &);

+};

+

+int A::e()

+{

+  return 0;

+}

+

+A &A::f(double &a)

+{

+  union {

+    double x;

+    char y[8];

+  };

+  y[0] = e();

+  a = x;

+  return *this;

+}