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Diffstat (limited to 'support/cpp/gcc/expr.h')
| -rw-r--r-- | support/cpp/gcc/expr.h | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/support/cpp/gcc/expr.h b/support/cpp/gcc/expr.h new file mode 100644 index 000000000..311d0e79b --- /dev/null +++ b/support/cpp/gcc/expr.h @@ -0,0 +1,352 @@ +/* Definitions for code generation pass of GNU compiler. + Copyright (C) 1987-2022 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#if 0 // sdcpp ndef GCC_EXPR_H +#define GCC_EXPR_H + +/* This is the 4th arg to `expand_expr'. + EXPAND_STACK_PARM means we are possibly expanding a call param onto + the stack. + EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx. + EXPAND_INITIALIZER is similar but also record any labels on forced_labels. + EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address + is a constant that is not a legitimate address. + EXPAND_WRITE means we are only going to write to the resulting rtx. + EXPAND_MEMORY means we are interested in a memory result, even if + the memory is constant and we could have propagated a constant value, + or the memory is unaligned on a STRICT_ALIGNMENT target. */ +enum expand_modifier {EXPAND_NORMAL = 0, EXPAND_STACK_PARM, EXPAND_SUM, + EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER, EXPAND_WRITE, + EXPAND_MEMORY}; + +/* Prevent the compiler from deferring stack pops. See + inhibit_defer_pop for more information. */ +#define NO_DEFER_POP (inhibit_defer_pop += 1) + +/* Allow the compiler to defer stack pops. See inhibit_defer_pop for + more information. */ +#define OK_DEFER_POP (inhibit_defer_pop -= 1) + +/* This structure is used to pass around information about exploded + unary, binary and trinary expressions between expand_expr_real_1 and + friends. */ +typedef struct separate_ops +{ + enum tree_code code; + location_t location; + tree type; + tree op0, op1, op2; +} *sepops; + +/* This is run during target initialization to set up which modes can be + used directly in memory and to initialize the block move optab. */ +extern void init_expr_target (void); + +/* This is run at the start of compiling a function. */ +extern void init_expr (void); + +/* Emit some rtl insns to move data between rtx's, converting machine modes. + Both modes must be floating or both fixed. */ +extern void convert_move (rtx, rtx, int); + +/* Convert an rtx to specified machine mode and return the result. */ +extern rtx convert_to_mode (machine_mode, rtx, int); + +/* Convert an rtx to MODE from OLDMODE and return the result. */ +extern rtx convert_modes (machine_mode, machine_mode, rtx, int); + +/* Expand a call to memcpy or memmove or memcmp, and return the result. */ +extern rtx emit_block_op_via_libcall (enum built_in_function, rtx, rtx, rtx, + bool); + +static inline rtx +emit_block_copy_via_libcall (rtx dst, rtx src, rtx size, bool tailcall = false) +{ + return emit_block_op_via_libcall (BUILT_IN_MEMCPY, dst, src, size, tailcall); +} + +static inline rtx +emit_block_move_via_libcall (rtx dst, rtx src, rtx size, bool tailcall = false) +{ + return emit_block_op_via_libcall (BUILT_IN_MEMMOVE, dst, src, size, tailcall); +} + +static inline rtx +emit_block_comp_via_libcall (rtx dst, rtx src, rtx size, bool tailcall = false) +{ + return emit_block_op_via_libcall (BUILT_IN_MEMCMP, dst, src, size, tailcall); +} + +/* Emit code to move a block Y to a block X. */ +enum block_op_methods +{ + BLOCK_OP_NORMAL, + BLOCK_OP_NO_LIBCALL, + BLOCK_OP_CALL_PARM, + /* Like BLOCK_OP_NORMAL, but the libcall can be tail call optimized. */ + BLOCK_OP_TAILCALL, + /* Like BLOCK_OP_NO_LIBCALL, but instead of emitting a libcall return + pc_rtx to indicate nothing has been emitted and let the caller handle + it. */ + BLOCK_OP_NO_LIBCALL_RET +}; + +typedef rtx (*by_pieces_constfn) (void *, void *, HOST_WIDE_INT, + fixed_size_mode); + +/* The second pointer passed to by_pieces_constfn. */ +struct by_pieces_prev +{ + rtx data; + fixed_size_mode mode; +}; + +extern rtx emit_block_move (rtx, rtx, rtx, enum block_op_methods); +extern rtx emit_block_move_hints (rtx, rtx, rtx, enum block_op_methods, + unsigned int, HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + bool bail_out_libcall = false, + bool *is_move_done = NULL, + bool might_overlap = false); +extern rtx emit_block_cmp_hints (rtx, rtx, rtx, tree, rtx, bool, + by_pieces_constfn, void *); +extern bool emit_storent_insn (rtx to, rtx from); + +/* Copy all or part of a value X into registers starting at REGNO. + The number of registers to be filled is NREGS. */ +extern void move_block_to_reg (int, rtx, int, machine_mode); + +/* Copy all or part of a BLKmode value X out of registers starting at REGNO. + The number of registers to be filled is NREGS. */ +extern void move_block_from_reg (int, rtx, int); + +/* Generate a non-consecutive group of registers represented by a PARALLEL. */ +extern rtx gen_group_rtx (rtx); + +/* Load a BLKmode value into non-consecutive registers represented by a + PARALLEL. */ +extern void emit_group_load (rtx, rtx, tree, poly_int64); + +/* Similarly, but load into new temporaries. */ +extern rtx emit_group_load_into_temps (rtx, rtx, tree, poly_int64); + +/* Move a non-consecutive group of registers represented by a PARALLEL into + a non-consecutive group of registers represented by a PARALLEL. */ +extern void emit_group_move (rtx, rtx); + +/* Move a group of registers represented by a PARALLEL into pseudos. */ +extern rtx emit_group_move_into_temps (rtx); + +/* Store a BLKmode value from non-consecutive registers represented by a + PARALLEL. */ +extern void emit_group_store (rtx, rtx, tree, poly_int64); + +extern rtx maybe_emit_group_store (rtx, tree); + +/* Mark REG as holding a parameter for the next CALL_INSN. + Mode is TYPE_MODE of the non-promoted parameter, or VOIDmode. */ +extern void use_reg_mode (rtx *, rtx, machine_mode); +extern void clobber_reg_mode (rtx *, rtx, machine_mode); + +extern rtx copy_blkmode_to_reg (machine_mode, tree); + +/* Mark REG as holding a parameter for the next CALL_INSN. */ +static inline void +use_reg (rtx *fusage, rtx reg) +{ + use_reg_mode (fusage, reg, VOIDmode); +} + +/* Mark REG as clobbered by the call with FUSAGE as CALL_INSN_FUNCTION_USAGE. */ +static inline void +clobber_reg (rtx *fusage, rtx reg) +{ + clobber_reg_mode (fusage, reg, VOIDmode); +} + +/* Mark NREGS consecutive regs, starting at REGNO, as holding parameters + for the next CALL_INSN. */ +extern void use_regs (rtx *, int, int); + +/* Mark a PARALLEL as holding a parameter for the next CALL_INSN. */ +extern void use_group_regs (rtx *, rtx); + +#ifdef GCC_INSN_CODES_H +extern rtx expand_cmpstrn_or_cmpmem (insn_code, rtx, rtx, rtx, tree, rtx, + HOST_WIDE_INT); +#endif + +/* Write zeros through the storage of OBJECT. + If OBJECT has BLKmode, SIZE is its length in bytes. */ +extern rtx clear_storage (rtx, rtx, enum block_op_methods); +extern rtx clear_storage_hints (rtx, rtx, enum block_op_methods, + unsigned int, HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned); +/* The same, but always output an library call. */ +extern rtx set_storage_via_libcall (rtx, rtx, rtx, bool = false); + +/* Expand a setmem pattern; return true if successful. */ +extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int, + unsigned int, HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT); + +/* Return nonzero if it is desirable to store LEN bytes generated by + CONSTFUN with several move instructions by store_by_pieces + function. CONSTFUNDATA is a pointer which will be passed as argument + in every CONSTFUN call. + ALIGN is maximum alignment we can assume. + MEMSETP is true if this is a real memset/bzero, not a copy + of a const string. */ +extern int can_store_by_pieces (unsigned HOST_WIDE_INT, + by_pieces_constfn, + void *, unsigned int, bool); + +/* Generate several move instructions to store LEN bytes generated by + CONSTFUN to block TO. (A MEM rtx with BLKmode). CONSTFUNDATA is a + pointer which will be passed as argument in every CONSTFUN call. + ALIGN is maximum alignment we can assume. + MEMSETP is true if this is a real memset/bzero, not a copy. + Returns TO + LEN. */ +extern rtx store_by_pieces (rtx, unsigned HOST_WIDE_INT, by_pieces_constfn, + void *, unsigned int, bool, memop_ret); + +/* If can_store_by_pieces passes for worst-case values near MAX_LEN, call + store_by_pieces within conditionals so as to handle variable LEN efficiently, + storing VAL, if non-NULL_RTX, or valc instead. */ +extern bool try_store_by_multiple_pieces (rtx to, rtx len, + unsigned int ctz_len, + unsigned HOST_WIDE_INT min_len, + unsigned HOST_WIDE_INT max_len, + rtx val, char valc, + unsigned int align); + +/* Emit insns to set X from Y. */ +extern rtx_insn *emit_move_insn (rtx, rtx); +extern rtx_insn *gen_move_insn (rtx, rtx); + +/* Emit insns to set X from Y, with no frills. */ +extern rtx_insn *emit_move_insn_1 (rtx, rtx); + +extern rtx_insn *emit_move_complex_push (machine_mode, rtx, rtx); +extern rtx_insn *emit_move_complex_parts (rtx, rtx); +extern rtx read_complex_part (rtx, bool); +extern void write_complex_part (rtx, rtx, bool); +extern rtx read_complex_part (rtx, bool); +extern rtx emit_move_resolve_push (machine_mode, rtx); + +/* Push a block of length SIZE (perhaps variable) + and return an rtx to address the beginning of the block. */ +extern rtx push_block (rtx, poly_int64, int); + +/* Generate code to push something onto the stack, given its mode and type. */ +extern bool emit_push_insn (rtx, machine_mode, tree, rtx, unsigned int, + int, rtx, poly_int64, rtx, rtx, int, rtx, bool); + +/* Extract the accessible bit-range from a COMPONENT_REF. */ +extern void get_bit_range (poly_uint64_pod *, poly_uint64_pod *, tree, + poly_int64_pod *, tree *); + +/* Expand an assignment that stores the value of FROM into TO. */ +extern void expand_assignment (tree, tree, bool); + +/* Generate code for computing expression EXP, + and storing the value into TARGET. + If SUGGEST_REG is nonzero, copy the value through a register + and return that register, if that is possible. */ +extern rtx store_expr (tree, rtx, int, bool, bool); + +/* Given an rtx that may include add and multiply operations, + generate them as insns and return a pseudo-reg containing the value. + Useful after calling expand_expr with 1 as sum_ok. */ +extern rtx force_operand (rtx, rtx); + +/* Work horses for expand_expr. */ +extern rtx expand_expr_real (tree, rtx, machine_mode, + enum expand_modifier, rtx *, bool); +extern rtx expand_expr_real_1 (tree, rtx, machine_mode, + enum expand_modifier, rtx *, bool); +extern rtx expand_expr_real_2 (sepops, rtx, machine_mode, + enum expand_modifier); + +/* Generate code for computing expression EXP. + An rtx for the computed value is returned. The value is never null. + In the case of a void EXP, const0_rtx is returned. */ +static inline rtx +expand_expr (tree exp, rtx target, machine_mode mode, + enum expand_modifier modifier) +{ + return expand_expr_real (exp, target, mode, modifier, NULL, false); +} + +static inline rtx +expand_normal (tree exp) +{ + return expand_expr_real (exp, NULL_RTX, VOIDmode, EXPAND_NORMAL, NULL, false); +} + + +/* Return STRING_CST and set offset, size and decl, if the first + argument corresponds to a string constant. */ +extern tree string_constant (tree, tree *, tree *, tree *); +/* Similar to string_constant, return a STRING_CST corresponding + to the value representation of the first argument if it's + a constant. */ +extern tree byte_representation (tree, tree *, tree *, tree *); + +extern enum tree_code maybe_optimize_mod_cmp (enum tree_code, tree *, tree *); +extern void maybe_optimize_sub_cmp_0 (enum tree_code, tree *, tree *); + +/* Two different ways of generating switch statements. */ +extern int try_casesi (tree, tree, tree, tree, rtx, rtx, rtx, profile_probability); +extern int try_tablejump (tree, tree, tree, tree, rtx, rtx, profile_probability); + +extern int safe_from_p (const_rtx, tree, int); + +/* Get the personality libfunc for a function decl. */ +rtx get_personality_function (tree); + +/* Determine whether the LEN bytes can be moved by using several move + instructions. Return nonzero if a call to move_by_pieces should + succeed. */ +extern bool can_move_by_pieces (unsigned HOST_WIDE_INT, unsigned int); + +extern unsigned HOST_WIDE_INT highest_pow2_factor (const_tree); + +extern bool categorize_ctor_elements (const_tree, HOST_WIDE_INT *, + HOST_WIDE_INT *, HOST_WIDE_INT *, + bool *); + +extern void expand_operands (tree, tree, rtx, rtx*, rtx*, + enum expand_modifier); + +/* rtl.h and tree.h were included. */ +/* Return an rtx for the size in bytes of the value of an expr. */ +extern rtx expr_size (tree); + +extern bool mem_ref_refers_to_non_mem_p (tree); +extern bool non_mem_decl_p (tree); + +#endif /* GCC_EXPR_H */ |