GCC Middle and Back End API Reference
lower_subreg_choices Struct Reference

#include <lower-subreg.h>

Data Fields

bool move_modes_to_split [MAX_MACHINE_MODE]
bool splitting_zext
bool splitting_ashift [MAX_BITS_PER_WORD]
bool splitting_lshiftrt [MAX_BITS_PER_WORD]
bool splitting_ashiftrt [MAX_BITS_PER_WORD]
bool something_to_do

Detailed Description

   Information about whether, and where, lower-subreg should be applied.  

Field Documentation

bool lower_subreg_choices::move_modes_to_split[MAX_MACHINE_MODE]
     A boolean vector for move splitting that is indexed by mode and is
     true for each mode that is to have its copies split.  
bool lower_subreg_choices::something_to_do
     True if there is at least one mode that is worth splitting.  
bool lower_subreg_choices::splitting_ashift[MAX_BITS_PER_WORD]
     Index X is true if twice_word_mode shifts by X + BITS_PER_WORD
     should be split.  
bool lower_subreg_choices::splitting_ashiftrt[MAX_BITS_PER_WORD]
bool lower_subreg_choices::splitting_lshiftrt[MAX_BITS_PER_WORD]
bool lower_subreg_choices::splitting_zext
     True if zero-extensions from word_mode to twice_word_mode should
     be split.  

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