diff options
Diffstat (limited to 'gcc/reload.h')
| -rw-r--r-- | gcc/reload.h | 79 |
1 files changed, 64 insertions, 15 deletions
diff --git a/gcc/reload.h b/gcc/reload.h index 340f81d..baa7548 100644 --- a/gcc/reload.h +++ b/gcc/reload.h @@ -100,7 +100,7 @@ struct reload int inc; /* A reg for which reload_in is the equivalent. If reload_in is a symbol_ref which came from - reg_equiv_constant, then this is the pseudo + reg_equiv_consant, then this is the pseudo which has that symbol_ref as equivalent. */ rtx in_reg; rtx out_reg; @@ -204,20 +204,62 @@ extern struct target_reload *this_target_reload; #define caller_save_initialized_p \ (this_target_reload->x_caller_save_initialized_p) -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; - -/* 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; - -/* The size of the previous array, for GC purposes. */ -extern GTY(()) int reg_equiv_init_size; +/* 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) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->constant +#define reg_equiv_invariant(ELT) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->invariant +#define reg_equiv_memory_loc(ELT) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->memory_loc +#define reg_equiv_address(ELT) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->address +#define reg_equiv_mem(ELT) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->mem +#define reg_equiv_alt_mem_list(ELT) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->alt_mem_list +#define reg_equiv_init(ELT) \ + VEC_index (reg_equivs_t, reg_equivs, (ELT))->init + +DEF_VEC_O(reg_equivs_t); +DEF_VEC_ALLOC_O(reg_equivs_t, gc); +extern VEC(reg_equivs_t,gc) *reg_equivs; /* All the "earlyclobber" operands of the current insn are recorded here. */ @@ -420,3 +462,10 @@ 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); + +/* Ideally this function would be in ira.c or reload, but due to dependencies + on integrate.h, it's part of integrate.c. */ +extern void allocate_initial_values (VEC (reg_equivs_t, gc) *); + +/* Allocate or grow the reg_equiv tables, initializing new entries to 0. */ +extern void grow_reg_equivs (void); |