target_reload Struct Reference

#include <reload.h>

Public Member Functions
enum	machine_mode (x_regno_save_mode[FIRST_PSEUDO_REGISTER][MAX_MOVE_MAX/MIN_UNITS_PER_WORD+1])

Data Fields
bool	x_indirect_symref_ok
bool	x_double_reg_address_ok
bool	x_spill_indirect_levels
bool	x_caller_save_initialized_p
int	x_cached_reg_save_code [FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]
int	x_cached_reg_restore_code [FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]

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Detailed Description

Target-dependent globals.

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Member Function Documentation

enum target_reload::machine_mode

(

x_regno_save_mode

[FIRST_PSEUDO_REGISTER][MAX_MOVE_MAX/MIN_UNITS_PER_WORD+1]

)

Modes for each hard register that we can save. The smallest mode is wide enough to save the entire contents of the register. When saving the register because it is live we first try to save in multi-register modes. If that is not possible the save is done one register at a time.

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Field Documentation

int target_reload::x_cached_reg_restore_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]

int target_reload::x_cached_reg_save_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]

We will only make a register eligible for caller-save if it can be saved in its widest mode with a simple SET insn as long as the memory address is valid. We record the INSN_CODE is those insns here since when we emit them, the addresses might not be valid, so they might not be recognized.

bool target_reload::x_caller_save_initialized_p

True if caller-save has been reinitialized.

bool target_reload::x_double_reg_address_ok

Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid.

bool target_reload::x_indirect_symref_ok

Nonzero if indirect addressing is supported when the innermost MEM is of the form (MEM (SYMBOL_REF sym)). It is assumed that the level to which these are valid is the same as spill_indirect_levels, above.

bool target_reload::x_spill_indirect_levels

Nonzero if indirect addressing is supported on the machine; this means that spilling (REG n) does not require reloading it into a register in order to do (MEM (REG n)) or (MEM (PLUS (REG n) (CONST_INT c))). The value indicates the level of indirect addressing supported, e.g., two means that (MEM (MEM (REG n))) is also valid if (REG n) does not get a hard register.

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

• reload.h