diff options
Diffstat (limited to 'gcc/config/ia64/ia64.c')
| -rw-r--r-- | gcc/config/ia64/ia64.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c index 42eec17..85bca08 100644 --- a/gcc/config/ia64/ia64.c +++ b/gcc/config/ia64/ia64.c @@ -1,6 +1,7 @@ /* Definitions of target machine for GNU compiler. Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, - 2009 Free Software Foundation, Inc. + 2009 + Free Software Foundation, Inc. Contributed by James E. Wilson <wilson@cygnus.com> and David Mosberger <davidm@hpl.hp.com>. @@ -199,6 +200,7 @@ static rtx gen_movdi_x (rtx, rtx, rtx); static rtx gen_fr_spill_x (rtx, rtx, rtx); static rtx gen_fr_restore_x (rtx, rtx, rtx); +static bool ia64_can_eliminate (const int, const int); static enum machine_mode hfa_element_mode (const_tree, bool); static void ia64_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode, tree, int *, int); @@ -522,6 +524,9 @@ static const struct attribute_spec ia64_attribute_table[] = #undef TARGET_C_MODE_FOR_SUFFIX #define TARGET_C_MODE_FOR_SUFFIX ia64_c_mode_for_suffix +#undef TARGET_CAN_ELIMINATE +#define TARGET_CAN_ELIMINATE ia64_can_eliminate + struct gcc_target targetm = TARGET_INITIALIZER; typedef enum @@ -2639,6 +2644,14 @@ ia64_compute_frame_size (HOST_WIDE_INT size) current_frame_info.initialized = reload_completed; } +/* Worker function for TARGET_CAN_ELIMINATE. */ + +bool +ia64_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) +{ + return (to == BR_REG (0) ? current_function_is_leaf : true); +} + /* Compute the initial difference between the specified pair of registers. */ HOST_WIDE_INT |