X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gcc%2Freload.h;h=05ee881bcf9e79b6c155dfd3d62bd864338a1f66;hb=2cd45f0e6826ddcc92216a508104b2802eddece3;hp=a3c1f07bd9f404095cde89e33e267810892163f6;hpb=de8f4b07c03ffb0db0562f462be066684af2f0b7;p=gcc.git diff --git a/gcc/reload.h b/gcc/reload.h index a3c1f07bd9f..05ee881bcf9 100644 --- a/gcc/reload.h +++ b/gcc/reload.h @@ -30,11 +30,9 @@ along with GCC; see the file COPYING3. If not see SECONDARY_RELOAD_CLASS (CLASS, MODE, X) #endif -extern int register_move_cost (enum machine_mode, enum reg_class, - enum reg_class); -extern int memory_move_cost (enum machine_mode, enum reg_class, bool); -extern int memory_move_secondary_cost (enum machine_mode, enum reg_class, - bool); +extern int register_move_cost (enum machine_mode, reg_class_t, reg_class_t); +extern int memory_move_cost (enum machine_mode, reg_class_t, bool); +extern int memory_move_secondary_cost (enum machine_mode, reg_class_t, bool); /* Maximum number of reloads we can need. */ #define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1)) @@ -154,20 +152,112 @@ extern struct reload rld[MAX_RELOADS]; extern int n_reloads; #endif -extern GTY (()) VEC(rtx,gc) *reg_equiv_memory_loc_vec; -extern rtx *reg_equiv_constant; -extern rtx *reg_equiv_invariant; -extern rtx *reg_equiv_memory_loc; -extern rtx *reg_equiv_address; -extern rtx *reg_equiv_mem; -extern rtx *reg_equiv_alt_mem_list; +/* Target-dependent globals. */ +struct target_reload { + /* 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 x_indirect_symref_ok; + + /* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid. */ + bool x_double_reg_address_ok; + + /* 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. */ + bool x_spill_indirect_levels; + + /* True if caller-save has been reinitialized. */ + bool x_caller_save_initialized_p; + + /* 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. */ + enum machine_mode (x_regno_save_mode + [FIRST_PSEUDO_REGISTER] + [MAX_MOVE_MAX / MIN_UNITS_PER_WORD + 1]); + + /* 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. */ + int x_cached_reg_save_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]; + int x_cached_reg_restore_code[FIRST_PSEUDO_REGISTER][MAX_MACHINE_MODE]; +}; -/* Element N is the list of insns that initialized reg N from its equivalent - constant or memory slot. */ -extern GTY((length("reg_equiv_init_size"))) rtx *reg_equiv_init; +extern struct target_reload default_target_reload; +#if SWITCHABLE_TARGET +extern struct target_reload *this_target_reload; +#else +#define this_target_reload (&default_target_reload) +#endif -/* The size of the previous array, for GC purposes. */ -extern GTY(()) int reg_equiv_init_size; +#define indirect_symref_ok \ + (this_target_reload->x_indirect_symref_ok) +#define double_reg_address_ok \ + (this_target_reload->x_double_reg_address_ok) +#define caller_save_initialized_p \ + (this_target_reload->x_caller_save_initialized_p) + +/* Register equivalences. Indexed by register number. */ +typedef struct reg_equivs +{ + /* The constant value to which pseudo reg N is equivalent, + or zero if pseudo reg N is not equivalent to a constant. + find_reloads looks at this in order to replace pseudo reg N + with the constant it stands for. */ + rtx constant; + + /* An invariant value to which pseudo reg N is equivalent. + eliminate_regs_in_insn uses this to replace pseudos in particular + contexts. */ + rtx invariant; + + /* A memory location to which pseudo reg N is equivalent, + prior to any register elimination (such as frame pointer to stack + pointer). Depending on whether or not it is a valid address, this value + is transferred to either equiv_address or equiv_mem. */ + rtx memory_loc; + + /* The address of stack slot to which pseudo reg N is equivalent. + This is used when the address is not valid as a memory address + (because its displacement is too big for the machine.) */ + rtx address; + + /* The memory slot to which pseudo reg N is equivalent, + or zero if pseudo reg N is not equivalent to a memory slot. */ + rtx mem; + + /* An EXPR_LIST of REG_EQUIVs containing MEMs with + alternate representations of the location of pseudo reg N. */ + rtx alt_mem_list; + + /* The list of insns that initialized reg N from its equivalent + constant or memory slot. */ + rtx init; +} reg_equivs_t; + +#define reg_equiv_constant(ELT) \ + (*reg_equivs)[(ELT)].constant +#define reg_equiv_invariant(ELT) \ + (*reg_equivs)[(ELT)].invariant +#define reg_equiv_memory_loc(ELT) \ + (*reg_equivs)[(ELT)].memory_loc +#define reg_equiv_address(ELT) \ + (*reg_equivs)[(ELT)].address +#define reg_equiv_mem(ELT) \ + (*reg_equivs)[(ELT)].mem +#define reg_equiv_alt_mem_list(ELT) \ + (*reg_equivs)[(ELT)].alt_mem_list +#define reg_equiv_init(ELT) \ + (*reg_equivs)[(ELT)].init + +extern vec *reg_equivs; /* All the "earlyclobber" operands of the current insn are recorded here. */ @@ -181,15 +271,6 @@ extern int reload_n_operands; Used in find_equiv_reg. */ extern int reload_first_uid; -/* 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. */ - -extern char indirect_symref_ok; - -/* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid. */ -extern char double_reg_address_ok; - extern int num_not_at_initial_offset; #if defined SET_HARD_REG_BIT && defined CLEAR_REG_SET @@ -249,8 +330,8 @@ extern void compute_use_by_pseudos (HARD_REG_SET *, bitmap); /* Functions from reload.c: */ -extern enum reg_class secondary_reload_class (bool, enum reg_class, - enum machine_mode, rtx); +extern reg_class_t secondary_reload_class (bool, reg_class_t, + enum machine_mode, rtx); #ifdef GCC_INSN_CODES_H extern enum reg_class scratch_reload_class (enum insn_code); @@ -328,16 +409,13 @@ extern int push_reload (rtx, rtx, rtx *, rtx *, enum reg_class, enum machine_mode, enum machine_mode, int, int, int, enum reload_type); -/* Functions in postreload.c: */ -extern void reload_cse_regs (rtx); - /* Functions in reload1.c: */ /* Initialize the reload pass once per compilation. */ extern void init_reload (void); /* The reload pass itself. */ -extern int reload (rtx, int); +extern bool reload (rtx, int); /* Mark the slots in regs_ever_live for the hard regs used by pseudo-reg number REGNO. */ @@ -355,9 +433,6 @@ extern void calculate_elim_costs_all_insns (void); /* Deallocate the reload register used by reload number R. */ extern void deallocate_reload_reg (int r); -/* True if caller-save has been reinitialized. */ -extern bool caller_save_initialized_p; - /* Functions in caller-save.c: */ /* Initialize for caller-save. */ @@ -382,3 +457,6 @@ extern void debug_reload (void); /* Compute the actual register we should reload to, in case we're reloading to/from a register that is wider than a word. */ extern rtx reload_adjust_reg_for_mode (rtx, enum machine_mode); + +/* Allocate or grow the reg_equiv tables, initializing new entries to 0. */ +extern void grow_reg_equivs (void);