ia64: Issue REG_CFA_REGISTER for ar.pfs at alloc insn.

        * config/ia64/ia64.c (ia64_expand_prologue): Emit REG_CFA_REGISTER
        for ar.pfs save at alloc insn.

From-SVN: r175871

gcc/ChangeLog

 2011-07-05  Richard Henderson  <rth@redhat.com>
 
+	* config/ia64/ia64.c (ia64_expand_prologue): Emit REG_CFA_REGISTER
+	for ar.pfs save at alloc insn.
+
+2011-07-05  Richard Henderson  <rth@redhat.com>
+
 	* config/arm/arm.c (arm_dwarf_handle_frame_unspec): Remove.
 	(TARGET_DWARF_HANDLE_FRAME_UNSPEC): Remove.
 	(arm_expand_prologue): Use REG_CFA_REGISTER to mark the

gcc/config/ia64/ia64.c

@@ -3249,7 +3249,14 @@ ia64_expand_prologue (void)
 				   GEN_INT (current_frame_info.n_local_regs),
 				   GEN_INT (current_frame_info.n_output_regs),
 				   GEN_INT (current_frame_info.n_rotate_regs)));
-      RTX_FRAME_RELATED_P (insn) = (current_frame_info.r[reg_save_ar_pfs] != 0);
+      if (current_frame_info.r[reg_save_ar_pfs])
+	{
+	  RTX_FRAME_RELATED_P (insn) = 1;
+	  add_reg_note (insn, REG_CFA_REGISTER,
+			gen_rtx_SET (VOIDmode,
+				     ar_pfs_save_reg,
+				     gen_rtx_REG (DImode, AR_PFS_REGNUM)));
+	}
     }
 
   /* Set up frame pointer, stack pointer, and spill iterators.  */