/* Definitions for code generation pass of GNU compiler.
- Copyright (C) 1987, 1991 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1991, 1992, 1993 Free Software Foundation, Inc.
This file is part of GNU CC.
extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
+/* Define functions given in optabs.c. */
+
/* Expand a binary operation given optab and rtx operands. */
-extern rtx expand_binop PROTO((enum machine_mode, optab, rtx, rtx, rtx, int, enum optab_methods));
+extern rtx expand_binop PROTO((enum machine_mode, optab, rtx, rtx, rtx,
+ int, enum optab_methods));
/* Expand a binary operation with both signed and unsigned forms. */
-extern rtx sign_expand_binop PROTO((enum machine_mode, optab, optab, rtx, rtx, rtx, int, enum optab_methods));
+extern rtx sign_expand_binop PROTO((enum machine_mode, optab, optab, rtx,
+ rtx, rtx, int, enum optab_methods));
+
+/* Generate code to perform an operation on two operands with two results. */
+extern int expand_twoval_binop PROTO((optab, rtx, rtx, rtx, rtx, int));
/* Expand a unary arithmetic operation given optab rtx operand. */
extern rtx expand_unop PROTO((enum machine_mode, optab, rtx, rtx, int));
/* Expand the complex absolute value operation. */
extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int));
-/* Arguments MODE, RTX: return an rtx for the negation of that value.
- May emit insns. */
-extern rtx negate_rtx PROTO((enum machine_mode, rtx));
+/* Generate an instruction with a given INSN_CODE with an output and
+ an input. */
+extern void emit_unop_insn PROTO((int, rtx, rtx, enum rtx_code));
-/* Expand a logical AND operation. */
-extern rtx expand_and PROTO((rtx, rtx, rtx));
+/* Emit code to perform a series of operations on a multi-word quantity, one
+ word at a time. */
+extern rtx emit_no_conflict_block PROTO((rtx, rtx, rtx, rtx, rtx));
-/* Emit a store-flag operation. */
-extern rtx emit_store_flag PROTO((rtx, enum rtx_code, rtx, rtx, enum machine_mode, int, int));
+/* Emit code to make a call to a constant function or a library call. */
+extern void emit_libcall_block PROTO((rtx, rtx, rtx, rtx));
+/* Emit one rtl instruction to store zero in specified rtx. */
+extern void emit_clr_insn PROTO((rtx));
-/* Given a JUMP_INSN, return a description of the test being made. */
-extern rtx get_condition PROTO((rtx, rtx *));
+/* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */
+extern void emit_0_to_1_insn PROTO((rtx));
+
+/* Emit one rtl insn to compare two rtx's. */
+extern void emit_cmp_insn PROTO((rtx, rtx, enum rtx_code, rtx,
+ enum machine_mode, int, int));
+
+/* Nonzero if a compare of mode MODE can be done straightforwardly
+ (without splitting it into pieces). */
+extern int can_compare_p PROTO((enum machine_mode));
+
+/* Generate code to indirectly jump to a location given in the rtx LOC. */
+extern void emit_indirect_jump PROTO((rtx));
+
+/* Create but don't emit one rtl instruction to add one rtx into another.
+ Modes must match; operands must meet the operation's predicates.
+ Likewise for subtraction and for just copying.
+ These do not call protect_from_queue; caller must do so. */
+extern rtx gen_add2_insn PROTO((rtx, rtx));
+extern rtx gen_sub2_insn PROTO((rtx, rtx));
+extern rtx gen_move_insn PROTO((rtx, rtx));
+extern int have_add2_insn PROTO((enum machine_mode));
+extern int have_sub2_insn PROTO((enum machine_mode));
/* Return the INSN_CODE to use for an extend operation. */
-extern enum insn_code can_extend_p PROTO((enum machine_mode, enum machine_mode, int));
+extern enum insn_code can_extend_p PROTO((enum machine_mode,
+ enum machine_mode, int));
+
+/* Generate the body of an insn to extend Y (with mode MFROM)
+ into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
+extern rtx gen_extend_insn PROTO((rtx, rtx, enum machine_mode,
+ enum machine_mode, int));
/* Initialize the tables that control conversion between fixed and
floating values. */
extern void init_fixtab PROTO((void));
extern void init_floattab PROTO((void));
+/* Generate code for a FLOAT_EXPR. */
+extern void expand_float PROTO((rtx, rtx, int));
+
/* Generate code for a FIX_EXPR. */
extern void expand_fix PROTO((rtx, rtx, int));
-/* Generate code for a FLOAT_EXPR. */
-extern void expand_float PROTO((rtx, rtx, int));
+/* Call this once to initialize the contents of the optabs
+ appropriately for the current target machine. */
+extern void init_optabs PROTO((void));
+\f
+/* Functions from expmed.c: (/
-/* Create but don't emit one rtl instruction to add one rtx into another.
- Modes must match; operands must meet the operation's predicates.
- Likewise for subtraction and for just copying.
- These do not call protect_from_queue; caller must do so. */
-extern rtx gen_add2_insn PROTO((rtx, rtx));
-extern rtx gen_sub2_insn PROTO((rtx, rtx));
-extern rtx gen_move_insn PROTO((rtx, rtx));
+/* Arguments MODE, RTX: return an rtx for the negation of that value.
+ May emit insns. */
+extern rtx negate_rtx PROTO((enum machine_mode, rtx));
-/* Emit one rtl instruction to store zero in specified rtx. */
-extern void emit_clr_insn PROTO((rtx));
+/* Expand a logical AND operation. */
+extern rtx expand_and PROTO((rtx, rtx, rtx));
-/* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */
-extern void emit_0_to_1_insn PROTO((rtx));
+/* Emit a store-flag operation. */
+extern rtx emit_store_flag PROTO((rtx, enum rtx_code, rtx, rtx,
+ enum machine_mode, int, int));
-/* Emit one rtl insn to compare two rtx's. */
-extern void emit_cmp_insn PROTO((rtx, rtx, enum rtx_code, rtx, enum machine_mode, int, int));
+/* Functions from loop.c: */
-/* Emit insns to set X from Y, with no frills. */
-extern rtx emit_move_insn_1 PROTO ((rtx, rtx));
+/* Given a JUMP_INSN, return a description of the test being made. */
+extern rtx get_condition PROTO((rtx, rtx *));
+\f
+/* Functions from expr.c: */
-/* Generate rtl to compare two rtx's, will call emit_cmp_insn. */
-extern rtx compare_from_rtx PROTO((rtx, rtx, enum rtx_code, int, enum machine_mode, rtx, int));
+/* This is run once per compilation to set up which modes can be used
+ directly in memory and to initialize the block move optab. */
+extern void init_expr_once PROTO((void));
+
+/* This is run at the start of compiling a function. */
+extern void init_expr PROTO((void));
+
+/* Use protect_from_queue to convert a QUEUED expression
+ into something that you can put immediately into an instruction. */
+extern rtx protect_from_queue PROTO((rtx, int));
+
+/* Perform all the pending incrementations. */
+extern void emit_queue PROTO((void));
/* Emit some rtl insns to move data between rtx's, converting machine modes.
Both modes must be floating or both fixed. */
/* Convert an rtx to specified machine mode and return the result. */
extern rtx convert_to_mode PROTO((enum machine_mode, rtx, int));
-/* Emit code to push some arguments and call a library routine,
- storing the value in a specified place. Calling sequence is
- complicated. */
+/* Emit code to move a block Y to a block X.
+extern void emit_block_move PROTO((rtx, rtx, rtx, int));
+
+/* 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 PROTO((int, rtx, int, enum 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 PROTO((int, rtx, int));
+
+/* Mark NREGS consecutive regs, starting at REGNO, as being live now. */
+extern void use_regs PROTO((int, int));
+
+/* Write zeros through the storage of OBJECT.
+ If OBJECT has BLKmode, SIZE is its length in bytes. */
+extern void clear_storage PROTO((rtx, int));
+
+/* Emit insns to set X from Y. */
+extern rtx emit_move_insn PROTO((rtx, rtx));
+
+/* Emit insns to set X from Y, with no frills. */
+extern rtx emit_move_insn_1 PROTO ((rtx, rtx));
+
+/* Push a block of length SIZE (perhaps variable)
+ and return an rtx to address the beginning of the block. */
+extern rtx push_block PROTO((rtx, int, int));
+
+/* Make an operand to push someting on the stack. */
+extern rtx gen_push_operand PROTO((void));
+
+#ifdef TREE_CODE
+/* Generate code to push something onto the stack, given its mode and type. */
+extern void emit_push_insn PROTO((rtx, enum machine_mode, tree, rtx, int,
+ int, rtx, int, rtx, rtx));
+
+/* Emit library call. These cannot have accurate prototypes since they have
+ a variable number of args. */
extern void emit_library_call ();
+extern void emit_library_call_value ();
+
+/* Expand an assignment that stores the value of FROM into TO. */
+extern rtx expand_assignment PROTO((tree, tree, int, int));
+
+/* 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 PROTO((tree, rtx, int));
+#endif
/* Given an rtx that may include add and multiply operations,
generate them as insns and return a pseudo-reg containing the value.
extern rtx force_operand PROTO((rtx, rtx));
#ifdef TREE_CODE
+/* 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. */
+extern rtx expand_expr PROTO((tree, rtx, enum machine_mode,
+ enum expand_modifier));
+#endif
+
+/* At the start of a function, record that we have no previously-pushed
+ arguments waiting to be popped. */
+extern void init_pending_stack_adjust PROTO((void));
+
+/* When exiting from function, if safe, clear out any pending stack adjust
+ so the adjustment won't get done. */
+extern void clear_pending_stack_adjust PROTO((void));
+
+/* Pop any previously-pushed arguments that have not been popped yet. */
+extern void do_pending_stack_adjust PROTO((void));
+
+#ifdef TREE_CODE
+/* Expand all cleanups up to OLD_CLEANUPS. */
+extern void expand_cleanups_to PROTO((tree));
+
+/* Generate code to evaluate EXP and jump to LABEL if the value is zero. */
+extern void jumpifnot PROTO((tree, rtx));
+
+/* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */
+extern void jumpif PROTO((tree, rtx));
+
+/* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
+ the result is zero, or IF_TRUE_LABEL if the result is one. */
+extern void do_jump PROTO((tree, rtx, rtx));
+#endif
+
+/* Generate rtl to compare two rtx's, will call emit_cmp_insn. */
+extern rtx compare_from_rtx PROTO((rtx, rtx, enum rtx_code, int,
+ enum machine_mode, rtx, int));
+
+/* Generate a tablejump instruction (used for switch statements). */
+extern void do_tablejump PROTO((rtx, enum machine_mode, rtx, rtx, rtx));
+\f
+#ifdef TREE_CODE
/* 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 PROTO((tree));
in its original home. This becomes invalid if any more code is emitted. */
extern rtx hard_function_value PROTO((tree, tree));
-/* 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 PROTO((tree, rtx, int));
extern rtx prepare_call_address PROTO((rtx, tree, rtx*));
extern rtx expand_call PROTO((tree, rtx, int));
extern void emit_call_1 PROTO((rtx, tree, int, int, rtx, rtx, int, rtx, int));
-extern void emit_push_insn PROTO((rtx, enum machine_mode, tree, rtx, int, int, rtx, int, rtx, rtx));
extern rtx expand_shift PROTO((enum tree_code, enum machine_mode, rtx, tree, rtx, int));
extern rtx expand_divmod PROTO((int, enum tree_code, enum machine_mode, rtx, rtx, rtx, int));
-extern void jumpif PROTO((tree, rtx));
-extern void do_jump PROTO((tree, rtx, rtx));
extern void locate_and_pad_parm PROTO((enum machine_mode, tree, int, tree, struct args_size *, struct args_size *, struct args_size *));
extern rtx expand_inline_function PROTO((tree, tree, rtx, int, tree, rtx));
/* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary. */
in its original home. This becomes invalid if any more code is emitted. */
extern rtx hard_function_value ();
-/* 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 ();
-
extern rtx prepare_call_address ();
extern rtx expand_call ();
extern void emit_call_1 ();
-extern void emit_push_insn ();
extern rtx expand_shift ();
extern rtx expand_divmod ();
-extern void jumpif ();
-extern void do_jump ();
extern void locate_and_pad_parm ();
extern rtx expand_inline_function ();
extern rtx label_rtx ();
#endif
-
/* Indicate how an input argument register was promoted. */
extern rtx promoted_input_arg ();
of STACK_BOUNDARY / BITS_PER_UNIT. */
extern rtx round_push PROTO((rtx));
-/* Push a block of length SIZE (perhaps variable)
- and return an rtx to address the beginning of the block. */
-extern rtx push_block PROTO((rtx, int, int));
-
extern void emit_block_move PROTO((rtx, rtx, rtx, int));
-extern void use_regs PROTO((int, int));
-extern void move_block_to_reg PROTO((int, rtx, int, enum machine_mode));
extern rtx store_bit_field PROTO((rtx, int, int, enum machine_mode, rtx, int, int));
extern rtx extract_bit_field PROTO((rtx, int, int, int, rtx, enum machine_mode, enum machine_mode, int, int));
extern rtx expand_mult PROTO((enum machine_mode, rtx, rtx, rtx, int));
extern rtx expand_mult_add PROTO((rtx, rtx, rtx, rtx,enum machine_mode, int));
extern rtx expand_stmt_expr ();
-extern rtx emit_no_conflict_block PROTO((rtx, rtx, rtx, rtx, rtx));
-extern void emit_libcall_block PROTO((rtx, rtx, rtx, rtx));
-
-extern void jumpifnot ();
extern rtx assemble_static_space PROTO((int));
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