* target.def (conditional_register_usage): Define.

[pf3gnuchains/gcc-fork.git] / gcc / config / m32r / m32r.c

diff --git a/gcc/config/m32r/m32r.c b/gcc/config/m32r/m32r.c
index d17742d..18ac260 100644 (file)
--- a/gcc/config/m32r/m32r.c
+++ b/gcc/config/m32r/m32r.c
@@ -101,6 +101,7 @@ static rtx m32r_function_arg (CUMULATIVE_ARGS *, enum machine_mode,
 static void m32r_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode,
                                       const_tree, bool);
 static bool m32r_can_eliminate (const int, const int);
+static void m32r_conditional_register_usage (void);
 static void m32r_trampoline_init (rtx, tree, rtx);
 \f
 /* M32R specific attributes.  */
@@ -204,6 +205,9 @@ static const struct default_options m32r_option_optimization_table[] =
 #undef TARGET_CAN_ELIMINATE
 #define TARGET_CAN_ELIMINATE m32r_can_eliminate
 
+#undef TARGET_CONDITIONAL_REGISTER_USAGE
+#define TARGET_CONDITIONAL_REGISTER_USAGE m32r_conditional_register_usage
+
 #undef TARGET_TRAMPOLINE_INIT
 #define TARGET_TRAMPOLINE_INIT m32r_trampoline_init
 
@@ -2837,3 +2841,13 @@ m32r_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value)
                       gen_int_mode (TRAMPOLINE_SIZE, SImode), SImode,
                       GEN_INT (3), SImode);
 }
+
+static void
+m32r_conditional_register_usage (void)
+{
+  if (flag_pic)
+    {
+      fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1;
+      call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;
+    }
+}