NAME 
compilers/imcc/pbc.c
DESCRIPTION
emit imcc instructions into Parrot interpreter
the e_pbc_emit function is called per instruction
Notes:
I'm using existing data structures here (SymReg *) to store various global items (currently only PMC constants). The index in the constant table is in SymReg * ->color data member. This looks odd, but the register number from imc.c:allocate is also there for variables, so it's a little bit consistent at least.
So when reading color here it's either a constant table index or a Parrot register number, depending on data type.
TODO memory clean up
-lt
Functions
static void imcc_globals_destroy- Frees memory allocated for IMCC globals for one particular compilation unit.
static int add_const_table- Adds an empty item to constant table, returning its position.
static int add_const_table_pmc- Adds a PMC to the const table, returning its position.
static int add_const_table_key- Adds a key to the const table, returning its position.
int e_pbc_open- Opens a compilation unit to emit PBC.
static int old_blocks- Gets the size/line of bytecode in ops at this point.
opcode_t *make_jit_info- Creates JIT information for this compilation unit.
static void make_new_sub- Allocates a new globals->cs->subs structure.
static int get_old_size- Get the size/line of bytecode in ops to this point.
static void store_sub_size- Sets the given size and line parameters for the current compilation unit.
static void store_fixup- Stores fixup information for the given register, program counter, and offset.
static void store_key_const- Stores a constant key for the current compilation unit.
static int get_codesize- Stores globals for later fixup, returning the code size in number of ops.
static subs_t *find_global_label- Finds a global label, returning the symreg (and setting the (absolute) pc through the out parameter).
static void fixup_globals- Fixes global information -- particularly locations of global symbols.
STRING *IMCC_string_from_reg- Creates and returns a constant STRING, given a stringish SymReg.
static int add_const_str- Adds a constant string to constant_table.
static int add_const_num- Adds a constant num to constant_table.
static PMC *mk_multi_sig- Creates and returns a multi-signature PMC given a SymReg.
static PMC *create_lexinfo- Creates and returns a new LexInfo PMC for all lexicals in the given sub in the current compilation unit.
static PMC *find_outer- Returns any :outer sub for the current compilation unit.
static int add_const_pmc_sub- Adds a constant Sub in the current compilation unit, denoted by the offset and end positions.
static int add_const_key- Adds a constant key to constant_table.
static const char *slice_deb- Returns debugging information for the indicated slice type.
static opcode_t build_key- Builds a Key PMC from the given SymReg.
- Color is a Parrot register number or a constant table index. For the rest, please consult PDD08_KEYS(1). Additionally, I build a string representation of the key, which gets cached in the globals.keys.
INTVAL IMCC_int_from_reg- Creates and returns an INTEGER given an integer-like SymReg.
static void make_pmc_const- Creates a constant PMC, given a SymReg.
static void add_1_const- Adds a constant SymReg to the constant table, depending on its type.
static void constant_folding- Stores a constant's idx for later reuse.
int e_pbc_new_sub- Starts a new PBC emitting of a compilation unit, if the given compilation unit has any instructions.
int e_pbc_end_sub- Finishes the PBC emitting of a given compilation unit.
static void verify_signature- Checks if any get_ argument contains constants and fills in type bits for argument types and constants, if missing.
int e_pbc_emit- Starts to emit code for one instruction.
int e_pbc_close- Closes this PMC unit.
