re PR target/24445 ("unable to find a register to spill in class 'R0_REGS")

	PR target/24445
	* calls.c (expand_call): Copy a return value to a plain register
	if needed.

	* gcc.dg/pr24445.c: New test.

From-SVN: r106774

gcc/ChangeLog

+2005-11-11  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/24445
+	* calls.c (expand_call): Copy a return value to a plain register
+	if needed.
+
 2005-11-10  Alexandre Oliva  <aoliva@redhat.com>
 
 	PR target/24778

gcc/calls.c

@@ -2857,6 +2857,14 @@ expand_call (tree exp, rtx target, int ignore)
 	       && GET_MODE (target) == TYPE_MODE (TREE_TYPE (exp))
 	       && GET_MODE (target) == GET_MODE (valreg))
 	{
+	  /* We have to copy a return value in a CLASS_LIKELY_SPILLED hard
+	     reg to a plain register.  */
+	  if (REG_P (valreg)
+	      && HARD_REGISTER_P (valreg)
+	      && CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (REGNO (valreg)))
+	      && !(REG_P (target) && !HARD_REGISTER_P (target)))
+	    valreg = copy_to_reg (valreg);
+
 	  /* TARGET and VALREG cannot be equal at this point because the
 	     latter would not have REG_FUNCTION_VALUE_P true, while the
 	     former would if it were referring to the same register.

gcc/testsuite/ChangeLog

+2005-11-11  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/24445
+	* gcc.dg/pr24445.c: New test.
+
 2005-11-10  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/24655

gcc/testsuite/gcc.dg/pr24445.c

+/* { dg-do compile { target fpic } } */
+/* { dg-options "-O1 -fpic" } */
+extern int bar (void) __attribute__ ((__pure__));
+extern char *baz;
+void
+foo (void)
+{
+  baz = (char *) bar ();
+}