mode-switching.c File Reference

Data Structures
struct	seginfo
struct	bb_info

Functions
static struct seginfo *	new_seginfo (int, rtx, int, HARD_REG_SET)
static void	add_seginfo (struct bb_info *, struct seginfo *)
static void	reg_dies (rtx, HARD_REG_SET *)
static void	reg_becomes_live (rtx, const_rtx, void *)
static void	make_preds_opaque (basic_block, int)
static struct seginfo *	new_seginfo ()
static void	add_seginfo ()
static void	make_preds_opaque ()
static void	reg_dies ()
static void	reg_becomes_live ()
static basic_block	create_pre_exit ()
static int	optimize_mode_switching ()
static bool	gate_mode_switching ()
static unsigned int	rest_of_handle_mode_switching ()
rtl_opt_pass *	make_pass_mode_switching ()

Variables
static sbitmap *	antic
static sbitmap *	transp
static sbitmap *	comp

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Function Documentation

static void add_seginfo ( struct bb_info *  , struct seginfo *    )

static

Referenced by optimize_mode_switching().

static void add_seginfo ( )

static

Add a seginfo element to the end of a list.
   HEAD is a pointer to the list beginning.
   INFO is the structure to be linked in.   

References seginfo::next, and bb_info::seginfo.

static basic_block create_pre_exit ( )

static

Make sure if MODE_ENTRY is defined the MODE_EXIT is defined
   and vice versa.   

Split the fallthrough edge to the exit block, so that we can note
   that there NORMAL_MODE is required.  Return the new block if it's
   inserted before the exit block.  Otherwise return null.   

References edge_def::dest, emit_note_before(), edge_def::flags, seginfo::mode, split_block(), split_edge(), edge_def::src, and targetm.

Referenced by optimize_mode_switching().

static bool gate_mode_switching ( )

static

rtl_opt_pass* make_pass_mode_switching

(

)

static void make_preds_opaque ( basic_block  , int    )

static

Referenced by make_preds_opaque(), and optimize_mode_switching().

static void make_preds_opaque ( )

static

Make all predecessors of basic block B opaque, recursively, till we hit
   some that are already non-transparent, or an edge where aux is set; that
   denotes that a mode set is to be done on that edge.
   J is the bit number in the bitmaps that corresponds to the entity that
   we are currently handling mode-switching for.   

References edge_def::aux, bitmap_bit_p(), bitmap_clear_bit(), basic_block_def::index, make_preds_opaque(), basic_block_def::preds, and edge_def::src.

static struct seginfo* new_seginfo ( int  , rtx  , int  , HARD_REG_SET    )

staticread

Referenced by optimize_mode_switching().

static struct seginfo* new_seginfo ( )

staticread

This function will allocate a new BBINFO structure, initialized
   with the MODE, INSN, and basic block BB parameters.   

References seginfo::bbnum, seginfo::insn_ptr, seginfo::mode, seginfo::next, and seginfo::regs_live.

static int optimize_mode_switching ( )

static

Find all insns that need a particular mode setting, and insert the
   necessary mode switches.  Return true if we did work.   

References add_seginfo(), edge_def::aux, bitmap_bit_p(), bitmap_clear_bit(), bitmap_not(), bitmap_set_bit(), bitmap_vector_clear(), bitmap_vector_ones(), cleanup_cfg(), clear_aux_for_edges(), commit_edge_insertions(), bb_info::computing, create_pre_exit(), default_rtl_profile(), df_analyze(), df_get_live_in(), df_get_live_out(), edge_list, emit_insn_after(), emit_insn_before(), end_sequence(), edge_def::flags, free(), free_edge_list(), get_insns(), basic_block_def::index, insert(), insert_insn_on_edge(), seginfo::insn_ptr, make_preds_opaque(), seginfo::mode, new_seginfo(), seginfo::next, note_stores(), pre_edge_lcm(), basic_block_def::preds, reg_becomes_live(), reg_dies(), seginfo::regs_live, rtl_profile_for_bb(), rtl_profile_for_edge(), sbitmap_vector_alloc(), sbitmap_vector_free(), bb_info::seginfo, single_succ_edge(), split_edge(), edge_def::src, and start_sequence().

Referenced by rest_of_handle_mode_switching().

static void reg_becomes_live ( rtx  , const_rtx  , void *    )

static

Referenced by optimize_mode_switching().

static void reg_becomes_live ( )

static

Record in LIVE that register REG became live.
   This is called via note_stores.   

References add_to_hard_reg_set().

static void reg_dies ( rtx  , HARD_REG_SET *    )

static

Referenced by optimize_mode_switching().

static void reg_dies ( )

static

Record in LIVE that register REG died.   

References remove_from_hard_reg_set().

static unsigned int rest_of_handle_mode_switching ( )

static

References optimize_mode_switching().

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Variable Documentation

sbitmap* antic

static

These bitmaps are used for the LCM algorithm.   

sbitmap* comp

static

sbitmap* transp

static