_expr Struct Reference

#include <sel-sched-ir.h>

Collaboration diagram for _expr:

Data Fields
vinsn_t	vinsn
int	spec
int	usefulness
int	priority
int	priority_adj
int	sched_times
int	orig_bb_index
ds_t	spec_done_ds
ds_t	spec_to_check_ds
int	orig_sched_cycle
vec< expr_history_def >	history_of_changes
signed char	target_available
BOOL_BITFIELD	needs_spec_check_p: 1
BOOL_BITFIELD	was_substituted: 1
BOOL_BITFIELD	was_renamed: 1
BOOL_BITFIELD	cant_move: 1

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Detailed Description

   Expression information.  

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Field Documentation

BOOL_BITFIELD _expr::cant_move

     True when expression can't be moved.  

vec<expr_history_def> _expr::history_of_changes

     This vector contains the history of insn's transformations.  

BOOL_BITFIELD _expr::needs_spec_check_p

     True when this expression needs a speculation check to be scheduled.
     This is used during find_used_regs.  

int _expr::orig_bb_index

     A basic block index this was originated from.  Zero when there is
     more than one originator.  

int _expr::orig_sched_cycle

     Cycle on which original insn was scheduled.  Zero when it has not yet
     been scheduled or more than one originator.  

int _expr::priority

     A priority of this expression.  

int _expr::priority_adj

     A priority adjustment of this expression.  

int _expr::sched_times

     Number of times the insn was scheduled.  

int _expr::spec

     SPEC is the degree of speculativeness.
     FIXME: now spec is increased when an rhs is moved through a
     conditional, thus showing only control speculativeness.  In the
     future we'd like to count data spec separately to allow a better
     control on scheduling.  

ds_t _expr::spec_done_ds

     Instruction should be of SPEC_DONE_DS type in order to be moved to this
     point.  

ds_t _expr::spec_to_check_ds

     SPEC_TO_CHECK_DS hold speculation types that should be checked
     (used only during move_op ()).  

signed char _expr::target_available

     True (1) when original target (register or memory) of this instruction
     is available for scheduling, false otherwise.  -1 means we're not sure;
     please run find_used_regs to clarify.  

int _expr::usefulness

     Degree of speculativeness measured as probability of executing
     instruction's original basic block given relative to
     the current scheduling point.  

vinsn_t _expr::vinsn

     Insn description.  

BOOL_BITFIELD _expr::was_renamed

     True when the expression was renamed.  

BOOL_BITFIELD _expr::was_substituted

     True when the expression was substituted.  Used for statistical
     purposes.  

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The documentation for this struct was generated from the following file:

• sel-sched-ir.h