/* Definitions for code generation pass of GNU compiler.
- Copyright (C) 1987-2015 Free Software Foundation, Inc.
+ Copyright (C) 1987-2024 Free Software Foundation, Inc.
This file is part of GCC.
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);
+extern rtx convert_modes (machine_mode mode, machine_mode oldmode,
+ rtx x, int unsignedp);
-/* Emit code to move a block Y to a block X. */
+/* Variant of convert_modes for ABI parameter passing/return. */
+extern rtx convert_float_to_wider_int (machine_mode mode, machine_mode fmode,
+ rtx x);
+
+/* Variant of convert_modes for ABI parameter passing/return. */
+extern rtx convert_wider_int_to_float (machine_mode mode, machine_mode imode,
+ rtx x);
+/* 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);
+
+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);
+}
+
+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);
+}
+
+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
+ 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
};
-extern GTY(()) tree block_clear_fn;
-extern void init_block_move_fn (const char *);
-extern void init_block_clear_fn (const char *);
+typedef rtx (*by_pieces_constfn) (void *, void *, HOST_WIDE_INT,
+ fixed_size_mode);
-extern rtx emit_block_move (rtx, rtx, rtx, enum block_op_methods);
-extern rtx emit_block_move_via_libcall (rtx, rtx, rtx, bool);
+/* 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,
+ unsigned ctz_size = 0);
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);
+ unsigned HOST_WIDE_INT,
+ bool bail_out_libcall = false,
+ bool *is_move_done = NULL,
+ bool might_overlap = false,
+ unsigned ctz_size = 0);
+extern rtx emit_block_cmp_hints (rtx, rtx, rtx, tree, rtx, bool,
+ by_pieces_constfn, void *,
+ unsigned ctz_len = 0);
extern bool emit_storent_insn (rtx to, rtx from);
/* Copy all or part of a value X into registers starting at REGNO.
/* Load a BLKmode value into non-consecutive registers represented by a
PARALLEL. */
-extern void emit_group_load (rtx, rtx, tree, int);
+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, int);
+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. */
/* Store a BLKmode value from non-consecutive registers represented by a
PARALLEL. */
-extern void emit_group_store (rtx, rtx, tree, int);
+extern void emit_group_store (rtx, rtx, tree, poly_int64);
extern rtx maybe_emit_group_store (rtx, tree);
-/* Copy BLKmode object from a set of registers. */
-extern void copy_blkmode_from_reg (rtx, 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 rtx copy_blkmode_to_reg (machine_mode, tree);
/* Mark REG as holding a parameter for the next CALL_INSN. */
-static inline void
+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
+inline void
clobber_reg (rtx *fusage, rtx reg)
{
clobber_reg_mode (fusage, reg, VOIDmode);
/* 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);
unsigned int, HOST_WIDE_INT,
unsigned HOST_WIDE_INT,
unsigned HOST_WIDE_INT,
- unsigned HOST_WIDE_INT);
+ unsigned HOST_WIDE_INT,
+ unsigned);
/* The same, but always output an library call. */
-rtx set_storage_via_libcall (rtx, rtx, rtx, bool);
+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 HOST_WIDE_INT,
unsigned HOST_WIDE_INT);
-extern unsigned HOST_WIDE_INT move_by_pieces_ninsns (unsigned HOST_WIDE_INT,
- unsigned int,
- unsigned int);
-
-/* Return nonzero if it is desirable to store LEN bytes generated by
+/* Return true 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,
- rtx (*) (void *, HOST_WIDE_INT,
- machine_mode),
- void *, unsigned int, bool);
+extern bool 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
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,
- rtx (*) (void *, HOST_WIDE_INT, machine_mode),
- void *, unsigned int, bool, int);
+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 *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 void write_complex_part (rtx, rtx, bool, 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, int, int);
+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, int, rtx, rtx, int, rtx, bool);
+ 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 *, poly_uint64 *, tree,
+ poly_int64 *, tree *);
/* Expand an assignment that stores the value of FROM into TO. */
extern void expand_assignment (tree, tree, bool);
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_with_bounds (tree, rtx, int, bool, tree);
-extern rtx store_expr (tree, rtx, int, bool);
+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.
/* 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
+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
+inline rtx
expand_normal (tree exp)
{
return expand_expr_real (exp, NULL_RTX, VOIDmode, EXPAND_NORMAL, NULL, false);
}
-/* Return the tree node and offset if a given argument corresponds to
- a string constant. */
-extern tree string_constant (tree, tree *);
+/* 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, int);
-extern int try_tablejump (tree, tree, tree, tree, rtx, rtx, int);
+extern bool try_casesi (tree, tree, tree, tree, rtx, rtx, rtx,
+ profile_probability);
+extern bool try_tablejump (tree, tree, tree, tree, rtx, rtx,
+ profile_probability);
-extern int safe_from_p (const_rtx, tree, int);
+extern bool 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 int can_move_by_pieces (unsigned HOST_WIDE_INT, unsigned int);
+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 *, bool *);
+ HOST_WIDE_INT *, HOST_WIDE_INT *,
+ bool *);
+extern bool immediate_const_ctor_p (const_tree, unsigned int words = 1);
+extern void store_constructor (tree, rtx, int, poly_int64, bool);
+extern HOST_WIDE_INT int_expr_size (const_tree exp);
extern void expand_operands (tree, tree, rtx, rtx*, rtx*,
enum expand_modifier);
/* 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 */