NAME 
compilers/imcc/instructions.c
DESCRIPTION
When generating the code, the instructions of the program are stored in an array.
After the register allocation is resolved, the instructions array is flushed.
These functions operate over this array and its contents.
Functions
Instruction *_mk_instruction
Creates a new instruction
void imcc_init_tables
Initializes IMCC's table of opcodes,
based on the list maintained by the Parrot interpreter.
Stores the results in global variable int ins_writes2
Returns TRUE if instruction ins writes to a register of type t
int instruction_reads
next two functions are called very often,
says gprof they should be fast
int instruction_writes
Determines whether the instruction int get_branch_regno
Get the register number of an address which is a branch target
SymReg *get_branch_reg
Get the register corresponding to an address which is a branch target
Instruction *_delete_ins
Delete instruction ins.
It's up to the caller to actually free the memory of ins,
if appropriate.The instruction following ins is returned.
Instruction *delete_ins
Delete instruction ins,
and then free it.The instruction following ins is returned.
void insert_ins
Insert Instruction void prepend_ins
Insert Instruction void subst_ins
Substitute Instruction Instruction *move_ins
Move instruction ins from its current position to the position following instruction to.
Returns the instruction following the initial position of ins.
Instruction *emitb
Emit a single instruction into the current unit buffer.
void free_ins
Free the Instruction structure ins.
int ins_print
Print details of instruction ins in file fd.
static int e_file_open
Prints a message to STDOUT.
static int e_file_close
RT#48260: Not yet documented!!!
static int e_file_emit
RT#48260: Not yet documented!!!
int emit_open
Opens the emitter function int emit_flush
Flushes the emitter by emitting all the instructions in the current IMC_Unit int emit_close
Closes the given emitter.
w_special.
ins writes to the SymReg r.
Returns 1 if it does,
0 if not.
tmp in the execution flow after Instruction ins.
tmp into the execution flow before Instruction ins.
tmp for Instruction ins.
Free ins if needs_freeing is true.
open of the given type.
Passes the param to the open function.
unit.
