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gmqcc/ir.c

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/*
* Copyright (C) 2012
* Wolfgang Bumiller
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include "gmqcc.h"
#include "ir.h"
/***********************************************************************
* Type sizes used at multiple points in the IR codegen
*/
const char *type_name[TYPE_COUNT] = {
"void",
"string",
"float",
"vector",
"entity",
"field",
"function",
"pointer",
"integer",
"variant",
"struct",
"union",
"array"
};
size_t type_sizeof[TYPE_COUNT] = {
1, /* TYPE_VOID */
1, /* TYPE_STRING */
1, /* TYPE_FLOAT */
3, /* TYPE_VECTOR */
1, /* TYPE_ENTITY */
1, /* TYPE_FIELD */
1, /* TYPE_FUNCTION */
1, /* TYPE_POINTER */
1, /* TYPE_INTEGER */
3, /* TYPE_VARIANT */
0, /* TYPE_STRUCT */
0, /* TYPE_UNION */
0, /* TYPE_ARRAY */
};
uint16_t type_store_instr[TYPE_COUNT] = {
INSTR_STORE_F, /* should use I when having integer support */
INSTR_STORE_S,
INSTR_STORE_F,
INSTR_STORE_V,
INSTR_STORE_ENT,
INSTR_STORE_FLD,
INSTR_STORE_FNC,
INSTR_STORE_ENT, /* should use I */
#if 0
INSTR_STORE_I, /* integer type */
#else
INSTR_STORE_F,
#endif
INSTR_STORE_V, /* variant, should never be accessed */
AINSTR_END, /* struct */
AINSTR_END, /* union */
AINSTR_END, /* array */
};
uint16_t field_store_instr[TYPE_COUNT] = {
INSTR_STORE_FLD,
INSTR_STORE_FLD,
INSTR_STORE_FLD,
INSTR_STORE_V,
INSTR_STORE_FLD,
INSTR_STORE_FLD,
INSTR_STORE_FLD,
INSTR_STORE_FLD,
#if 0
INSTR_STORE_FLD, /* integer type */
#else
INSTR_STORE_FLD,
#endif
INSTR_STORE_V, /* variant, should never be accessed */
AINSTR_END, /* struct */
AINSTR_END, /* union */
AINSTR_END, /* array */
};
uint16_t type_storep_instr[TYPE_COUNT] = {
INSTR_STOREP_F, /* should use I when having integer support */
INSTR_STOREP_S,
INSTR_STOREP_F,
INSTR_STOREP_V,
INSTR_STOREP_ENT,
INSTR_STOREP_FLD,
INSTR_STOREP_FNC,
INSTR_STOREP_ENT, /* should use I */
#if 0
INSTR_STOREP_ENT, /* integer type */
#else
INSTR_STOREP_F,
#endif
INSTR_STOREP_V, /* variant, should never be accessed */
AINSTR_END, /* struct */
AINSTR_END, /* union */
AINSTR_END, /* array */
};
uint16_t type_eq_instr[TYPE_COUNT] = {
INSTR_EQ_F, /* should use I when having integer support */
INSTR_EQ_S,
INSTR_EQ_F,
INSTR_EQ_V,
INSTR_EQ_E,
INSTR_EQ_E, /* FLD has no comparison */
INSTR_EQ_FNC,
INSTR_EQ_E, /* should use I */
#if 0
INSTR_EQ_I,
#else
INSTR_EQ_F,
#endif
INSTR_EQ_V, /* variant, should never be accessed */
AINSTR_END, /* struct */
AINSTR_END, /* union */
AINSTR_END, /* array */
};
uint16_t type_ne_instr[TYPE_COUNT] = {
INSTR_NE_F, /* should use I when having integer support */
INSTR_NE_S,
INSTR_NE_F,
INSTR_NE_V,
INSTR_NE_E,
INSTR_NE_E, /* FLD has no comparison */
INSTR_NE_FNC,
INSTR_NE_E, /* should use I */
#if 0
INSTR_NE_I,
#else
INSTR_NE_F,
#endif
INSTR_NE_V, /* variant, should never be accessed */
AINSTR_END, /* struct */
AINSTR_END, /* union */
AINSTR_END, /* array */
};
uint16_t type_not_instr[TYPE_COUNT] = {
INSTR_NOT_F, /* should use I when having integer support */
INSTR_NOT_S,
INSTR_NOT_F,
INSTR_NOT_V,
INSTR_NOT_ENT,
INSTR_NOT_ENT,
INSTR_NOT_FNC,
INSTR_NOT_ENT, /* should use I */
#if 0
INSTR_NOT_I, /* integer type */
#else
INSTR_NOT_F,
#endif
INSTR_NOT_V, /* variant, should never be accessed */
AINSTR_END, /* struct */
AINSTR_END, /* union */
AINSTR_END, /* array */
};
static void irerror(lex_ctx ctx, const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
con_cvprintmsg((void*)&ctx, LVL_ERROR, "internal error", msg, ap);
va_end(ap);
}
static bool irwarning(lex_ctx ctx, int warntype, const char *fmt, ...)
{
va_list ap;
int lvl = LVL_WARNING;
if (warntype && !OPTS_WARN(warntype))
return false;
if (opts_werror)
lvl = LVL_ERROR;
va_start(ap, fmt);
con_vprintmsg(lvl, ctx.file, ctx.line, "warning", fmt, ap);
va_end(ap);
return opts_werror;
}
/***********************************************************************
* Vector utility functions
*/
bool GMQCC_WARN vec_ir_value_find(ir_value **vec, ir_value *what, size_t *idx)
{
size_t i;
size_t len = vec_size(vec);
for (i = 0; i < len; ++i) {
if (vec[i] == what) {
if (idx) *idx = i;
return true;
}
}
return false;
}
bool GMQCC_WARN vec_ir_block_find(ir_block **vec, ir_block *what, size_t *idx)
{
size_t i;
size_t len = vec_size(vec);
for (i = 0; i < len; ++i) {
if (vec[i] == what) {
if (idx) *idx = i;
return true;
}
}
return false;
}
bool GMQCC_WARN vec_ir_instr_find(ir_instr **vec, ir_instr *what, size_t *idx)
{
size_t i;
size_t len = vec_size(vec);
for (i = 0; i < len; ++i) {
if (vec[i] == what) {
if (idx) *idx = i;
return true;
}
}
return false;
}
/***********************************************************************
* IR Builder
*/
static void ir_block_delete_quick(ir_block* self);
static void ir_instr_delete_quick(ir_instr *self);
static void ir_function_delete_quick(ir_function *self);
ir_builder* ir_builder_new(const char *modulename)
{
ir_builder* self;
self = (ir_builder*)mem_a(sizeof(*self));
if (!self)
return NULL;
self->functions = NULL;
self->globals = NULL;
self->fields = NULL;
self->extparams = NULL;
self->filenames = NULL;
self->filestrings = NULL;
self->str_immediate = 0;
self->name = NULL;
if (!ir_builder_set_name(self, modulename)) {
mem_d(self);
return NULL;
}
return self;
}
void ir_builder_delete(ir_builder* self)
{
size_t i;
mem_d((void*)self->name);
for (i = 0; i != vec_size(self->functions); ++i) {
ir_function_delete_quick(self->functions[i]);
}
vec_free(self->functions);
for (i = 0; i != vec_size(self->extparams); ++i) {
ir_value_delete(self->extparams[i]);
}
vec_free(self->extparams);
for (i = 0; i != vec_size(self->globals); ++i) {
ir_value_delete(self->globals[i]);
}
vec_free(self->globals);
for (i = 0; i != vec_size(self->fields); ++i) {
ir_value_delete(self->fields[i]);
}
vec_free(self->fields);
vec_free(self->filenames);
vec_free(self->filestrings);
mem_d(self);
}
bool ir_builder_set_name(ir_builder *self, const char *name)
{
if (self->name)
mem_d((void*)self->name);
self->name = util_strdup(name);
return !!self->name;
}
ir_function* ir_builder_get_function(ir_builder *self, const char *name)
{
size_t i;
for (i = 0; i < vec_size(self->functions); ++i) {
if (!strcmp(name, self->functions[i]->name))
return self->functions[i];
}
return NULL;
}
ir_function* ir_builder_create_function(ir_builder *self, const char *name, int outtype)
{
ir_function *fn = ir_builder_get_function(self, name);
if (fn) {
return NULL;
}
fn = ir_function_new(self, outtype);
if (!ir_function_set_name(fn, name))
{
ir_function_delete(fn);
return NULL;
}
vec_push(self->functions, fn);
fn->value = ir_builder_create_global(self, fn->name, TYPE_FUNCTION);
if (!fn->value) {
ir_function_delete(fn);
return NULL;
}
fn->value->isconst = true;
fn->value->outtype = outtype;
fn->value->constval.vfunc = fn;
fn->value->context = fn->context;
return fn;
}
ir_value* ir_builder_get_global(ir_builder *self, const char *name)
{
size_t i;
for (i = 0; i < vec_size(self->globals); ++i) {
if (!strcmp(self->globals[i]->name, name))
return self->globals[i];
}
return NULL;
}
ir_value* ir_builder_create_global(ir_builder *self, const char *name, int vtype)
{
ir_value *ve;
if (name && name[0] != '#')
{
ve = ir_builder_get_global(self, name);
if (ve) {
return NULL;
}
}
ve = ir_value_var(name, store_global, vtype);
vec_push(self->globals, ve);
return ve;
}
ir_value* ir_builder_get_field(ir_builder *self, const char *name)
{
size_t i;
for (i = 0; i < vec_size(self->fields); ++i) {
if (!strcmp(self->fields[i]->name, name))
return self->fields[i];
}
return NULL;
}
ir_value* ir_builder_create_field(ir_builder *self, const char *name, int vtype)
{
ir_value *ve = ir_builder_get_field(self, name);
if (ve) {
return NULL;
}
ve = ir_value_var(name, store_global, TYPE_FIELD);
ve->fieldtype = vtype;
vec_push(self->fields, ve);
return ve;
}
/***********************************************************************
*IR Function
*/
bool ir_function_naive_phi(ir_function*);
void ir_function_enumerate(ir_function*);
bool ir_function_calculate_liferanges(ir_function*);
bool ir_function_allocate_locals(ir_function*);
ir_function* ir_function_new(ir_builder* owner, int outtype)
{
ir_function *self;
self = (ir_function*)mem_a(sizeof(*self));
if (!self)
return NULL;
memset(self, 0, sizeof(*self));
self->name = NULL;
if (!ir_function_set_name(self, "<@unnamed>")) {
mem_d(self);
return NULL;
}
self->owner = owner;
self->context.file = "<@no context>";
self->context.line = 0;
self->outtype = outtype;
self->value = NULL;
self->builtin = 0;
self->params = NULL;
self->blocks = NULL;
self->values = NULL;
self->locals = NULL;
self->code_function_def = -1;
self->allocated_locals = 0;
self->run_id = 0;
return self;
}
bool ir_function_set_name(ir_function *self, const char *name)
{
if (self->name)
mem_d((void*)self->name);
self->name = util_strdup(name);
return !!self->name;
}
static void ir_function_delete_quick(ir_function *self)
{
size_t i;
mem_d((void*)self->name);
for (i = 0; i != vec_size(self->blocks); ++i)
ir_block_delete_quick(self->blocks[i]);
vec_free(self->blocks);
vec_free(self->params);
for (i = 0; i != vec_size(self->values); ++i)
ir_value_delete(self->values[i]);
vec_free(self->values);
for (i = 0; i != vec_size(self->locals); ++i)
ir_value_delete(self->locals[i]);
vec_free(self->locals);
/* self->value is deleted by the builder */
mem_d(self);
}
void ir_function_delete(ir_function *self)
{
size_t i;
mem_d((void*)self->name);
for (i = 0; i != vec_size(self->blocks); ++i)
ir_block_delete(self->blocks[i]);
vec_free(self->blocks);
vec_free(self->params);
for (i = 0; i != vec_size(self->values); ++i)
ir_value_delete(self->values[i]);
vec_free(self->values);
for (i = 0; i != vec_size(self->locals); ++i)
ir_value_delete(self->locals[i]);
vec_free(self->locals);
/* self->value is deleted by the builder */
mem_d(self);
}
void ir_function_collect_value(ir_function *self, ir_value *v)
{
vec_push(self->values, v);
}
ir_block* ir_function_create_block(ir_function *self, const char *label)
{
ir_block* bn = ir_block_new(self, label);
memcpy(&bn->context, &self->context, sizeof(self->context));
vec_push(self->blocks, bn);
return bn;
}
bool ir_function_finalize(ir_function *self)
{
if (self->builtin)
return true;
if (!ir_function_naive_phi(self))
return false;
ir_function_enumerate(self);
if (!ir_function_calculate_liferanges(self))
return false;
if (!ir_function_allocate_locals(self))
return false;
return true;
}
ir_value* ir_function_get_local(ir_function *self, const char *name)
{
size_t i;
for (i = 0; i < vec_size(self->locals); ++i) {
if (!strcmp(self->locals[i]->name, name))
return self->locals[i];
}
return NULL;
}
ir_value* ir_function_create_local(ir_function *self, const char *name, int vtype, bool param)
{
ir_value *ve;
/*
if (ir_function_get_local(self, name))
return NULL;
*/
if (param &&
vec_size(self->locals) &&
self->locals[vec_size(self->locals)-1]->store != store_param) {
irerror(self->context, "cannot add parameters after adding locals");
return NULL;
}
ve = ir_value_var(name, (param ? store_param : store_local), vtype);
vec_push(self->locals, ve);
return ve;
}
/***********************************************************************
*IR Block
*/
ir_block* ir_block_new(ir_function* owner, const char *name)
{
ir_block *self;
self = (ir_block*)mem_a(sizeof(*self));
if (!self)
return NULL;
memset(self, 0, sizeof(*self));
self->label = NULL;
if (name && !ir_block_set_label(self, name)) {
mem_d(self);
return NULL;
}
self->owner = owner;
self->context.file = "<@no context>";
self->context.line = 0;
self->final = false;
self->instr = NULL;
self->entries = NULL;
self->exits = NULL;
self->eid = 0;
self->is_return = false;
self->run_id = 0;
self->living = NULL;
self->generated = false;
return self;
}
static void ir_block_delete_quick(ir_block* self)
{
size_t i;
if (self->label) mem_d(self->label);
for (i = 0; i != vec_size(self->instr); ++i)
ir_instr_delete_quick(self->instr[i]);
vec_free(self->instr);
vec_free(self->entries);
vec_free(self->exits);
vec_free(self->living);
mem_d(self);
}
void ir_block_delete(ir_block* self)
{
size_t i;
if (self->label) mem_d(self->label);
for (i = 0; i != vec_size(self->instr); ++i)
ir_instr_delete(self->instr[i]);
vec_free(self->instr);
vec_free(self->entries);
vec_free(self->exits);
vec_free(self->living);
mem_d(self);
}
bool ir_block_set_label(ir_block *self, const char *name)
{
if (self->label)
mem_d((void*)self->label);
self->label = util_strdup(name);
return !!self->label;
}
/***********************************************************************
*IR Instructions
*/
ir_instr* ir_instr_new(ir_block* owner, int op)
{
ir_instr *self;
self = (ir_instr*)mem_a(sizeof(*self));
if (!self)
return NULL;
self->owner = owner;
self->context.file = "<@no context>";
self->context.line = 0;
self->opcode = op;
self->_ops[0] = NULL;
self->_ops[1] = NULL;
self->_ops[2] = NULL;
self->bops[0] = NULL;
self->bops[1] = NULL;
self->phi = NULL;
self->params = NULL;
self->eid = 0;
self->likely = true;
return self;
}
static void ir_instr_delete_quick(ir_instr *self)
{
vec_free(self->phi);
vec_free(self->params);
mem_d(self);
}
void ir_instr_delete(ir_instr *self)
{
size_t i;
/* The following calls can only delete from
* vectors, we still want to delete this instruction
* so ignore the return value. Since with the warn_unused_result attribute
* gcc doesn't care about an explicit: (void)foo(); to ignore the result,
* I have to improvise here and use if(foo());
*/
for (i = 0; i < vec_size(self->phi); ++i) {
size_t idx;
if (vec_ir_instr_find(self->phi[i].value->writes, self, &idx))
vec_remove(self->phi[i].value->writes, idx, 1);
if (vec_ir_instr_find(self->phi[i].value->reads, self, &idx))
vec_remove(self->phi[i].value->reads, idx, 1);
}
vec_free(self->phi);
for (i = 0; i < vec_size(self->params); ++i) {
size_t idx;
if (vec_ir_instr_find(self->params[i]->writes, self, &idx))
vec_remove(self->params[i]->writes, idx, 1);
if (vec_ir_instr_find(self->params[i]->reads, self, &idx))
vec_remove(self->params[i]->reads, idx, 1);
}
vec_free(self->params);
(void)!ir_instr_op(self, 0, NULL, false);
(void)!ir_instr_op(self, 1, NULL, false);
(void)!ir_instr_op(self, 2, NULL, false);
mem_d(self);
}
bool ir_instr_op(ir_instr *self, int op, ir_value *v, bool writing)
{
if (self->_ops[op]) {
size_t idx;
if (writing && vec_ir_instr_find(self->_ops[op]->writes, self, &idx))
vec_remove(self->_ops[op]->writes, idx, 1);
else if (vec_ir_instr_find(self->_ops[op]->reads, self, &idx))
vec_remove(self->_ops[op]->reads, idx, 1);
}
if (v) {
if (writing)
vec_push(v->writes, self);
else
vec_push(v->reads, self);
}
self->_ops[op] = v;
return true;
}
/***********************************************************************
*IR Value
*/
void ir_value_code_setaddr(ir_value *self, int32_t gaddr)
{
self->code.globaladdr = gaddr;
if (self->members[0]) self->members[0]->code.globaladdr = gaddr;
if (self->members[1]) self->members[1]->code.globaladdr = gaddr;
if (self->members[2]) self->members[2]->code.globaladdr = gaddr;
}
int32_t ir_value_code_addr(const ir_value *self)
{
if (self->store == store_return)
return OFS_RETURN + self->code.addroffset;
return self->code.globaladdr + self->code.addroffset;
}
ir_value* ir_value_var(const char *name, int storetype, int vtype)
{
ir_value *self;
self = (ir_value*)mem_a(sizeof(*self));
self->vtype = vtype;
self->fieldtype = TYPE_VOID;
self->outtype = TYPE_VOID;
self->store = storetype;
self->reads = NULL;
self->writes = NULL;
self->isconst = false;
self->context.file = "<@no context>";
self->context.line = 0;
self->name = NULL;
if (name && !ir_value_set_name(self, name)) {
irerror(self->context, "out of memory");
mem_d(self);
return NULL;
}
memset(&self->constval, 0, sizeof(self->constval));
memset(&self->code, 0, sizeof(self->code));
self->members[0] = NULL;
self->members[1] = NULL;
self->members[2] = NULL;
self->memberof = NULL;
self->life = NULL;
return self;
}
ir_value* ir_value_vector_member(ir_value *self, unsigned int member)
{
ir_value *m;
if (member >= 3)
return NULL;
if (self->members[member])
return self->members[member];
if (self->vtype == TYPE_VECTOR)
{
m = ir_value_var(self->name, self->store, TYPE_FLOAT);
if (!m)
return NULL;
m->context = self->context;
self->members[member] = m;
m->code.addroffset = member;
}
else if (self->vtype == TYPE_FIELD)
{
if (self->fieldtype != TYPE_VECTOR)
return NULL;
m = ir_value_var(self->name, self->store, TYPE_FIELD);
if (!m)
return NULL;
m->fieldtype = TYPE_FLOAT;
m->context = self->context;
self->members[member] = m;
m->code.addroffset = member;
}
else
{
irerror(self->context, "invalid member access on %s", self->name);
return NULL;
}
m->memberof = self;
return m;
}
ir_value* ir_value_out(ir_function *owner, const char *name, int storetype, int vtype)
{
ir_value *v = ir_value_var(name, storetype, vtype);
if (!v)
return NULL;
ir_function_collect_value(owner, v);
return v;
}
void ir_value_delete(ir_value* self)
{
size_t i;
if (self->name)
mem_d((void*)self->name);
if (self->isconst)
{
if (self->vtype == TYPE_STRING)
mem_d((void*)self->constval.vstring);
}
for (i = 0; i < 3; ++i) {
if (self->members[i])
ir_value_delete(self->members[i]);
}
vec_free(self->reads);
vec_free(self->writes);
vec_free(self->life);
mem_d(self);
}
bool ir_value_set_name(ir_value *self, const char *name)
{
if (self->name)
mem_d((void*)self->name);
self->name = util_strdup(name);
return !!self->name;
}
bool ir_value_set_float(ir_value *self, float f)
{
if (self->vtype != TYPE_FLOAT)
return false;
self->constval.vfloat = f;
self->isconst = true;
return true;
}
bool ir_value_set_func(ir_value *self, int f)
{
if (self->vtype != TYPE_FUNCTION)
return false;
self->constval.vint = f;
self->isconst = true;
return true;
}
bool ir_value_set_vector(ir_value *self, vector v)
{
if (self->vtype != TYPE_VECTOR)
return false;
self->constval.vvec = v;
self->isconst = true;
return true;
}
bool ir_value_set_field(ir_value *self, ir_value *fld)
{
if (self->vtype != TYPE_FIELD)
return false;
self->constval.vpointer = fld;
self->isconst = true;
return true;
}
static char *ir_strdup(const char *str)
{
if (str && !*str) {
/* actually dup empty strings */
char *out = mem_a(1);
*out = 0;
return out;
}
return util_strdup(str);
}
bool ir_value_set_string(ir_value *self, const char *str)
{
if (self->vtype != TYPE_STRING)
return false;
self->constval.vstring = ir_strdup(str);
self->isconst = true;
return true;
}
#if 0
bool ir_value_set_int(ir_value *self, int i)
{
if (self->vtype != TYPE_INTEGER)
return false;
self->constval.vint = i;
self->isconst = true;
return true;
}
#endif
bool ir_value_lives(ir_value *self, size_t at)
{
size_t i;
for (i = 0; i < vec_size(self->life); ++i)
{
ir_life_entry_t *life = &self->life[i];
if (life->start <= at && at <= life->end)
return true;
if (life->start > at) /* since it's ordered */
return false;
}
return false;
}
bool ir_value_life_insert(ir_value *self, size_t idx, ir_life_entry_t e)
{
size_t k;
vec_push(self->life, e);
for (k = vec_size(self->life)-1; k > idx; --k)
self->life[k] = self->life[k-1];
self->life[idx] = e;
return true;
}
bool ir_value_life_merge(ir_value *self, size_t s)
{
size_t i;
ir_life_entry_t *life = NULL;
ir_life_entry_t *before = NULL;
ir_life_entry_t new_entry;
/* Find the first range >= s */
for (i = 0; i < vec_size(self->life); ++i)
{
before = life;
life = &self->life[i];
if (life->start > s)
break;
}
/* nothing found? append */
if (i == vec_size(self->life)) {
ir_life_entry_t e;
if (life && life->end+1 == s)
{
/* previous life range can be merged in */
life->end++;
return true;
}
if (life && life->end >= s)
return false;
e.start = e.end = s;
vec_push(self->life, e);
return true;
}
/* found */
if (before)
{
if (before->end + 1 == s &&
life->start - 1 == s)
{
/* merge */
before->end = life->end;
vec_remove(self->life, i, 1);
return true;
}
if (before->end + 1 == s)
{
/* extend before */
before->end++;
return true;
}
/* already contained */
if (before->end >= s)
return false;
}
/* extend */
if (life->start - 1 == s)
{
life->start--;
return true;
}
/* insert a new entry */
new_entry.start = new_entry.end = s;
return ir_value_life_insert(self, i, new_entry);
}
bool ir_value_life_merge_into(ir_value *self, const ir_value *other)
{
size_t i, myi;
if (!vec_size(other->life))
return true;
if (!vec_size(self->life)) {
size_t count = vec_size(other->life);
ir_life_entry_t *life = vec_add(self->life, count);
memcpy(life, other->life, count * sizeof(*life));
return true;
}
myi = 0;
for (i = 0; i < vec_size(other->life); ++i)
{
const ir_life_entry_t *life = &other->life[i];
while (true)
{
ir_life_entry_t *entry = &self->life[myi];
if (life->end+1 < entry->start)
{
/* adding an interval before entry */
if (!ir_value_life_insert(self, myi, *life))
return false;
++myi;
break;
}
if (life->start < entry->start &&
life->end+1 >= entry->start)
{
/* starts earlier and overlaps */
entry->start = life->start;
}
if (life->end > entry->end &&
life->start <= entry->end+1)
{
/* ends later and overlaps */
entry->end = life->end;
}
/* see if our change combines it with the next ranges */
while (myi+1 < vec_size(self->life) &&
entry->end+1 >= self->life[1+myi].start)
{
/* overlaps with (myi+1) */
if (entry->end < self->life[1+myi].end)
entry->end = self->life[1+myi].end;
vec_remove(self->life, myi+1, 1);
entry = &self->life[myi];
}
/* see if we're after the entry */
if (life->start > entry->end)
{
++myi;
/* append if we're at the end */
if (myi >= vec_size(self->life)) {
vec_push(self->life, *life);
break;
}
/* otherweise check the next range */
continue;
}
break;
}
}
return true;
}
bool ir_values_overlap(const ir_value *a, const ir_value *b)
{
/* For any life entry in A see if it overlaps with
* any life entry in B.
* Note that the life entries are orderes, so we can make a
* more efficient algorithm there than naively translating the
* statement above.
*/
ir_life_entry_t *la, *lb, *enda, *endb;
/* first of all, if either has no life range, they cannot clash */
if (!vec_size(a->life) || !vec_size(b->life))
return false;
la = a->life;
lb = b->life;
enda = la + vec_size(a->life);
endb = lb + vec_size(b->life);
while (true)
{
/* check if the entries overlap, for that,
* both must start before the other one ends.
*/
if (la->start < lb->end &&
lb->start < la->end)
{
return true;
}
/* entries are ordered
* one entry is earlier than the other
* that earlier entry will be moved forward
*/
if (la->start < lb->start)
{
/* order: A B, move A forward
* check if we hit the end with A
*/
if (++la == enda)
break;
}
else /* if (lb->start < la->start) actually <= */
{
/* order: B A, move B forward
* check if we hit the end with B
*/
if (++lb == endb)
break;
}
}
return false;
}
/***********************************************************************
*IR main operations
*/
bool ir_block_create_store_op(ir_block *self, int op, ir_value *target, ir_value *what)
{
ir_instr *in;
if (self->final) {
irerror(self->context, "unreachable statement (%s)", self->label);
return false;
}
in = ir_instr_new(self, op);
if (!in)
return false;
if (target->store == store_value &&
(op < INSTR_STOREP_F || op > INSTR_STOREP_FNC))
{
irerror(self->context, "cannot store to an SSA value");
irerror(self->context, "trying to store: %s <- %s", target->name, what->name);
irerror(self->context, "instruction: %s", asm_instr[op].m);
return false;
}
if (!ir_instr_op(in, 0, target, true) ||
!ir_instr_op(in, 1, what, false))
{
return false;
}
vec_push(self->instr, in);
return true;
}
bool ir_block_create_store(ir_block *self, ir_value *target, ir_value *what)
{
int op = 0;
int vtype;
if (target->vtype == TYPE_VARIANT)
vtype = what->vtype;
else
vtype = target->vtype;
#if 0
if (vtype == TYPE_FLOAT && what->vtype == TYPE_INTEGER)
op = INSTR_CONV_ITOF;
else if (vtype == TYPE_INTEGER && what->vtype == TYPE_FLOAT)
op = INSTR_CONV_FTOI;
#endif
op = type_store_instr[vtype];
if (OPTS_FLAG(ADJUST_VECTOR_FIELDS)) {
if (op == INSTR_STORE_FLD && what->fieldtype == TYPE_VECTOR)
op = INSTR_STORE_V;
}
return ir_block_create_store_op(self, op, target, what);
}
bool ir_block_create_storep(ir_block *self, ir_value *target, ir_value *what)
{
int op = 0;
int vtype;
if (target->vtype != TYPE_POINTER)
return false;
/* storing using pointer - target is a pointer, type must be
* inferred from source
*/
vtype = what->vtype;
op = type_storep_instr[vtype];
if (OPTS_FLAG(ADJUST_VECTOR_FIELDS)) {
if (op == INSTR_STOREP_FLD && what->fieldtype == TYPE_VECTOR)
op = INSTR_STOREP_V;
}
return ir_block_create_store_op(self, op, target, what);
}
bool ir_block_create_return(ir_block *self, ir_value *v)
{
ir_instr *in;
if (self->final) {
irerror(self->context, "unreachable statement (%s)", self->label);
return false;
}
self->final = true;
self->is_return = true;
in = ir_instr_new(self, INSTR_RETURN);
if (!in)
return false;
if (v && !ir_instr_op(in, 0, v, false))
return false;
vec_push(self->instr, in);
return true;
}
bool ir_block_create_if(ir_block *self, ir_value *v,
ir_block *ontrue, ir_block *onfalse)
{
ir_instr *in;
if (self->final) {
irerror(self->context, "unreachable statement (%s)", self->label);
return false;
}
self->final = true;
/*in = ir_instr_new(self, (v->vtype == TYPE_STRING ? INSTR_IF_S : INSTR_IF_F));*/
in = ir_instr_new(self, VINSTR_COND);
if (!in)
return false;
if (!ir_instr_op(in, 0, v, false)) {
ir_instr_delete(in);
return false;
}
in->bops[0] = ontrue;
in->bops[1] = onfalse;
vec_push(self->instr, in);
vec_push(self->exits, ontrue);
vec_push(self->exits, onfalse);
vec_push(ontrue->entries, self);
vec_push(onfalse->entries, self);
return true;
}
bool ir_block_create_jump(ir_block *self, ir_block *to)
{
ir_instr *in;
if (self->final) {
irerror(self->context, "unreachable statement (%s)", self->label);
return false;
}
self->final = true;
in = ir_instr_new(self, VINSTR_JUMP);
if (!in)
return false;
in->bops[0] = to;
vec_push(self->instr, in);
vec_push(self->exits, to);
vec_push(to->entries, self);
return true;
}
bool ir_block_create_goto(ir_block *self, ir_block *to)
{
ir_instr *in;
if (self->final) {
irerror(self->context, "unreachable statement (%s)", self->label);
return false;
}
self->final = true;
in = ir_instr_new(self, INSTR_GOTO);
if (!in)
return false;
in->bops[0] = to;
vec_push(self->instr, in);
vec_push(self->exits, to);
vec_push(to->entries, self);
return true;
}
ir_instr* ir_block_create_phi(ir_block *self, const char *label, int ot)
{
ir_value *out;
ir_instr *in;
in = ir_instr_new(self, VINSTR_PHI);
if (!in)
return NULL;
out = ir_value_out(self->owner, label, store_value, ot);
if (!out) {
ir_instr_delete(in);
return NULL;
}
if (!ir_instr_op(in, 0, out, true)) {
ir_instr_delete(in);
ir_value_delete(out);
return NULL;
}
vec_push(self->instr, in);
return in;
}
ir_value* ir_phi_value(ir_instr *self)
{
return self->_ops[0];
}
void ir_phi_add(ir_instr* self, ir_block *b, ir_value *v)
{
ir_phi_entry_t pe;
if (!vec_ir_block_find(self->owner->entries, b, NULL)) {
/* Must not be possible to cause this, otherwise the AST
* is doing something wrong.
*/
irerror(self->context, "Invalid entry block for PHI");
abort();
}
pe.value = v;
pe.from = b;
vec_push(v->reads, self);
vec_push(self->phi, pe);
}
/* call related code */
ir_instr* ir_block_create_call(ir_block *self, const char *label, ir_value *func)
{
ir_value *out;
ir_instr *in;
in = ir_instr_new(self, INSTR_CALL0);
if (!in)
return NULL;
out = ir_value_out(self->owner, label, (func->outtype == TYPE_VOID) ? store_return : store_value, func->outtype);
if (!out) {
ir_instr_delete(in);
return NULL;
}
if (!ir_instr_op(in, 0, out, true) ||
!ir_instr_op(in, 1, func, false))
{
ir_instr_delete(in);
ir_value_delete(out);
return NULL;
}
vec_push(self->instr, in);
return in;
}
ir_value* ir_call_value(ir_instr *self)
{
return self->_ops[0];
}
void ir_call_param(ir_instr* self, ir_value *v)
{
vec_push(self->params, v);
vec_push(v->reads, self);
}
/* binary op related code */
ir_value* ir_block_create_binop(ir_block *self,
const char *label, int opcode,
ir_value *left, ir_value *right)
{
int ot = TYPE_VOID;
switch (opcode) {
case INSTR_ADD_F:
case INSTR_SUB_F:
case INSTR_DIV_F:
case INSTR_MUL_F:
case INSTR_MUL_V:
case INSTR_AND:
case INSTR_OR:
#if 0
case INSTR_AND_I:
case INSTR_AND_IF:
case INSTR_AND_FI:
case INSTR_OR_I:
case INSTR_OR_IF:
case INSTR_OR_FI:
#endif
case INSTR_BITAND:
case INSTR_BITOR:
#if 0
case INSTR_SUB_S: /* -- offset of string as float */
case INSTR_MUL_IF:
case INSTR_MUL_FI:
case INSTR_DIV_IF:
case INSTR_DIV_FI:
case INSTR_BITOR_IF:
case INSTR_BITOR_FI:
case INSTR_BITAND_FI:
case INSTR_BITAND_IF:
case INSTR_EQ_I:
case INSTR_NE_I:
#endif
ot = TYPE_FLOAT;
break;
#if 0
case INSTR_ADD_I:
case INSTR_ADD_IF:
case INSTR_ADD_FI:
case INSTR_SUB_I:
case INSTR_SUB_FI:
case INSTR_SUB_IF:
case INSTR_MUL_I:
case INSTR_DIV_I:
case INSTR_BITAND_I:
case INSTR_BITOR_I:
case INSTR_XOR_I:
case INSTR_RSHIFT_I:
case INSTR_LSHIFT_I:
ot = TYPE_INTEGER;
break;
#endif
case INSTR_ADD_V:
case INSTR_SUB_V:
case INSTR_MUL_VF:
case INSTR_MUL_FV:
#if 0
case INSTR_DIV_VF:
case INSTR_MUL_IV:
case INSTR_MUL_VI:
#endif
ot = TYPE_VECTOR;
break;
#if 0
case INSTR_ADD_SF:
ot = TYPE_POINTER;
break;
#endif
default:
/* ranges: */
/* boolean operations result in floats */
if (opcode >= INSTR_EQ_F && opcode <= INSTR_GT)
ot = TYPE_FLOAT;
else if (opcode >= INSTR_LE && opcode <= INSTR_GT)
ot = TYPE_FLOAT;
#if 0
else if (opcode >= INSTR_LE_I && opcode <= INSTR_EQ_FI)
ot = TYPE_FLOAT;
#endif
break;
};
if (ot == TYPE_VOID) {
/* The AST or parser were supposed to check this! */
return NULL;
}
return ir_block_create_general_instr(self, label, opcode, left, right, ot);
}
ir_value* ir_block_create_unary(ir_block *self,
const char *label, int opcode,
ir_value *operand)
{
int ot = TYPE_FLOAT;
switch (opcode) {
case INSTR_NOT_F:
case INSTR_NOT_V:
case INSTR_NOT_S:
case INSTR_NOT_ENT:
case INSTR_NOT_FNC:
#if 0
case INSTR_NOT_I:
#endif
ot = TYPE_FLOAT;
break;
/* QC doesn't have other unary operations. We expect extensions to fill
* the above list, otherwise we assume out-type = in-type, eg for an
* unary minus
*/
default:
ot = operand->vtype;
break;
};
if (ot == TYPE_VOID) {
/* The AST or parser were supposed to check this! */
return NULL;
}
/* let's use the general instruction creator and pass NULL for OPB */
return ir_block_create_general_instr(self, label, opcode, operand, NULL, ot);
}
ir_value* ir_block_create_general_instr(ir_block *self, const char *label,
int op, ir_value *a, ir_value *b, int outype)
{
ir_instr *instr;
ir_value *out;
out = ir_value_out(self->owner, label, store_value, outype);
if (!out)
return NULL;
instr = ir_instr_new(self, op);
if (!instr) {
ir_value_delete(out);
return NULL;
}
if (!ir_instr_op(instr, 0, out, true) ||
!ir_instr_op(instr, 1, a, false) ||
!ir_instr_op(instr, 2, b, false) )
{
goto on_error;
}
vec_push(self->instr, instr);
return out;
on_error:
ir_instr_delete(instr);
ir_value_delete(out);
return NULL;
}
ir_value* ir_block_create_fieldaddress(ir_block *self, const char *label, ir_value *ent, ir_value *field)
{
ir_value *v;
/* Support for various pointer types todo if so desired */
if (ent->vtype != TYPE_ENTITY)
return NULL;
if (field->vtype != TYPE_FIELD)
return NULL;
v = ir_block_create_general_instr(self, label, INSTR_ADDRESS, ent, field, TYPE_POINTER);
v->fieldtype = field->fieldtype;
return v;
}
ir_value* ir_block_create_load_from_ent(ir_block *self, const char *label, ir_value *ent, ir_value *field, int outype)
{
int op;
if (ent->vtype != TYPE_ENTITY)
return NULL;
/* at some point we could redirect for TYPE_POINTER... but that could lead to carelessness */
if (field->vtype != TYPE_FIELD)
return NULL;
switch (outype)
{
case TYPE_FLOAT: op = INSTR_LOAD_F; break;
case TYPE_VECTOR: op = INSTR_LOAD_V; break;
case TYPE_STRING: op = INSTR_LOAD_S; break;
case TYPE_FIELD: op = INSTR_LOAD_FLD; break;
case TYPE_ENTITY: op = INSTR_LOAD_ENT; break;
case TYPE_FUNCTION: op = INSTR_LOAD_FNC; break;
#if 0
case TYPE_POINTER: op = INSTR_LOAD_I; break;
case TYPE_INTEGER: op = INSTR_LOAD_I; break;
#endif
default:
irerror(self->context, "invalid type for ir_block_create_load_from_ent: %s", type_name[outype]);
return NULL;
}
return ir_block_create_general_instr(self, label, op, ent, field, outype);
}
ir_value* ir_block_create_add(ir_block *self,
const char *label,
ir_value *left, ir_value *right)
{
int op = 0;
int l = left->vtype;
int r = right->vtype;
if (l == r) {
switch (l) {
default:
irerror(self->context, "invalid type for ir_block_create_add: %s", type_name[l]);
return NULL;
case TYPE_FLOAT:
op = INSTR_ADD_F;
break;
#if 0
case TYPE_INTEGER:
op = INSTR_ADD_I;
break;
#endif
case TYPE_VECTOR:
op = INSTR_ADD_V;
break;
}
} else {
#if 0
if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
op = INSTR_ADD_FI;
else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
op = INSTR_ADD_IF;
else
#endif
{
irerror(self->context, "invalid type for ir_block_create_add: %s", type_name[l]);
return NULL;
}
}
return ir_block_create_binop(self, label, op, left, right);
}
ir_value* ir_block_create_sub(ir_block *self,
const char *label,
ir_value *left, ir_value *right)
{
int op = 0;
int l = left->vtype;
int r = right->vtype;
if (l == r) {
switch (l) {
default:
irerror(self->context, "invalid type for ir_block_create_sub: %s", type_name[l]);
return NULL;
case TYPE_FLOAT:
op = INSTR_SUB_F;
break;
#if 0
case TYPE_INTEGER:
op = INSTR_SUB_I;
break;
#endif
case TYPE_VECTOR:
op = INSTR_SUB_V;
break;
}
} else {
#if 0
if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
op = INSTR_SUB_FI;
else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
op = INSTR_SUB_IF;
else
#endif
{
irerror(self->context, "invalid type for ir_block_create_sub: %s", type_name[l]);
return NULL;
}
}
return ir_block_create_binop(self, label, op, left, right);
}
ir_value* ir_block_create_mul(ir_block *self,
const char *label,
ir_value *left, ir_value *right)
{
int op = 0;
int l = left->vtype;
int r = right->vtype;
if (l == r) {
switch (l) {
default:
irerror(self->context, "invalid type for ir_block_create_mul: %s", type_name[l]);
return NULL;
case TYPE_FLOAT:
op = INSTR_MUL_F;
break;
#if 0
case TYPE_INTEGER:
op = INSTR_MUL_I;
break;
#endif
case TYPE_VECTOR:
op = INSTR_MUL_V;
break;
}
} else {
if ( (l == TYPE_VECTOR && r == TYPE_FLOAT) )
op = INSTR_MUL_VF;
else if ( (l == TYPE_FLOAT && r == TYPE_VECTOR) )
op = INSTR_MUL_FV;
#if 0
else if ( (l == TYPE_VECTOR && r == TYPE_INTEGER) )
op = INSTR_MUL_VI;
else if ( (l == TYPE_INTEGER && r == TYPE_VECTOR) )
op = INSTR_MUL_IV;
else if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
op = INSTR_MUL_FI;
else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
op = INSTR_MUL_IF;
#endif
else {
irerror(self->context, "invalid type for ir_block_create_mul: %s", type_name[l]);
return NULL;
}
}
return ir_block_create_binop(self, label, op, left, right);
}
ir_value* ir_block_create_div(ir_block *self,
const char *label,
ir_value *left, ir_value *right)
{
int op = 0;
int l = left->vtype;
int r = right->vtype;
if (l == r) {
switch (l) {
default:
irerror(self->context, "invalid type for ir_block_create_div: %s", type_name[l]);
return NULL;
case TYPE_FLOAT:
op = INSTR_DIV_F;
break;
#if 0
case TYPE_INTEGER:
op = INSTR_DIV_I;
break;
#endif
}
} else {
#if 0
if ( (l == TYPE_VECTOR && r == TYPE_FLOAT) )
op = INSTR_DIV_VF;
else if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
op = INSTR_DIV_FI;
else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
op = INSTR_DIV_IF;
else
#endif
{
irerror(self->context, "invalid type for ir_block_create_div: %s", type_name[l]);
return NULL;
}
}
return ir_block_create_binop(self, label, op, left, right);
}
/* PHI resolving breaks the SSA, and must thus be the last
* step before life-range calculation.
*/
static bool ir_block_naive_phi(ir_block *self);
bool ir_function_naive_phi(ir_function *self)
{
size_t i;
for (i = 0; i < vec_size(self->blocks); ++i)
{
if (!ir_block_naive_phi(self->blocks[i]))
return false;
}
return true;
}
#if 0
static bool ir_naive_phi_emit_store(ir_block *block, size_t iid, ir_value *old, ir_value *what)
{
ir_instr *instr;
size_t i;
/* create a store */
if (!ir_block_create_store(block, old, what))
return false;
/* we now move it up */
instr = vec_last(block->instr);
for (i = vec_size(block->instr)-1; i > iid; --i)
block->instr[i] = block->instr[i-1];
block->instr[i] = instr;
return true;
}
#endif
static bool ir_block_naive_phi(ir_block *self)
{
size_t i, p; /*, w;*/
/* FIXME: optionally, create_phi can add the phis
* to a list so we don't need to loop through blocks
* - anyway: "don't optimize YET"
*/
for (i = 0; i < vec_size(self->instr); ++i)
{
ir_instr *instr = self->instr[i];
if (instr->opcode != VINSTR_PHI)
continue;
vec_remove(self->instr, i, 1);
--i; /* NOTE: i+1 below */
for (p = 0; p < vec_size(instr->phi); ++p)
{
ir_value *v = instr->phi[p].value;
ir_block *b = instr->phi[p].from;
if (v->store == store_value &&
vec_size(v->reads) == 1 &&
vec_size(v->writes) == 1)
{
/* replace the value */
if (!ir_instr_op(v->writes[0], 0, instr->_ops[0], true))
return false;
}
else
{
/* force a move instruction */
ir_instr *prevjump = vec_last(b->instr);
vec_pop(b->instr);
b->final = false;
instr->_ops[0]->store = store_global;
if (!ir_block_create_store(b, instr->_ops[0], v))
return false;
instr->_ops[0]->store = store_value;
vec_push(b->instr, prevjump);
b->final = true;
}
#if 0
ir_value *v = instr->phi[p].value;
for (w = 0; w < vec_size(v->writes); ++w) {
ir_value *old;
if (!v->writes[w]->_ops[0])
continue;
/* When the write was to a global, we have to emit a mov */
old = v->writes[w]->_ops[0];
/* The original instruction now writes to the PHI target local */
if (v->writes[w]->_ops[0] == v)
v->writes[w]->_ops[0] = instr->_ops[0];
if (old->store != store_value && old->store != store_local && old->store != store_param)
{
/* If it originally wrote to a global we need to store the value
* there as welli
*/
if (!ir_naive_phi_emit_store(self, i+1, old, v))
return false;
if (i+1 < vec_size(self->instr))
instr = self->instr[i+1];
else
instr = NULL;
/* In case I forget and access instr later, it'll be NULL
* when it's a problem, to make sure we crash, rather than accessing
* invalid data.
*/
}
else
{
/* If it didn't, we can replace all reads by the phi target now. */
size_t r;
for (r = 0; r < vec_size(old->reads); ++r)
{
size_t op;
ir_instr *ri = old->reads[r];
for (op = 0; op < vec_size(ri->phi); ++op) {
if (ri->phi[op].value == old)
ri->phi[op].value = v;
}
for (op = 0; op < 3; ++op) {
if (ri->_ops[op] == old)
ri->_ops[op] = v;
}
}
}
}
#endif
}
ir_instr_delete(instr);
}
return true;
}
/***********************************************************************
*IR Temp allocation code
* Propagating value life ranges by walking through the function backwards
* until no more changes are made.
* In theory this should happen once more than once for every nested loop
* level.
* Though this implementation might run an additional time for if nests.
*/
/* Enumerate instructions used by value's life-ranges
*/
static void ir_block_enumerate(ir_block *self, size_t *_eid)
{
size_t i;
size_t eid = *_eid;
for (i = 0; i < vec_size(self->instr); ++i)
{
self->instr[i]->eid = eid++;
}
*_eid = eid;
}
/* Enumerate blocks and instructions.
* The block-enumeration is unordered!
* We do not really use the block enumreation, however
* the instruction enumeration is important for life-ranges.
*/
void ir_function_enumerate(ir_function *self)
{
size_t i;
size_t instruction_id = 0;
for (i = 0; i < vec_size(self->blocks); ++i)
{
self->blocks[i]->eid = i;
self->blocks[i]->run_id = 0;
ir_block_enumerate(self->blocks[i], &instruction_id);
}
}
static bool ir_block_life_propagate(ir_block *b, ir_block *prev, bool *changed);
bool ir_function_calculate_liferanges(ir_function *self)
{
size_t i;
bool changed;
do {
self->run_id++;
changed = false;
for (i = 0; i != vec_size(self->blocks); ++i)
{
if (self->blocks[i]->is_return)
{
vec_free(self->blocks[i]->living);
if (!ir_block_life_propagate(self->blocks[i], NULL, &changed))
return false;
}
}
} while (changed);
if (vec_size(self->blocks)) {
ir_block *block = self->blocks[0];
for (i = 0; i < vec_size(block->living); ++i) {
ir_value *v = block->living[i];
if (v->memberof || v->store != store_local)
continue;
if (irwarning(v->context, WARN_USED_UNINITIALIZED,
"variable `%s` may be used uninitialized in this function", v->name))
{
return false;
}
}
}
return true;
}
/* Local-value allocator
* After finishing creating the liferange of all values used in a function
* we can allocate their global-positions.
* This is the counterpart to register-allocation in register machines.
*/
typedef struct {
ir_value **locals;
size_t *sizes;
size_t *positions;
} function_allocator;
static bool function_allocator_alloc(function_allocator *alloc, const ir_value *var)
{
ir_value *slot;
size_t vsize = type_sizeof[var->vtype];
slot = ir_value_var("reg", store_global, var->vtype);
if (!slot)
return false;
if (!ir_value_life_merge_into(slot, var))
goto localerror;
vec_push(alloc->locals, slot);
vec_push(alloc->sizes, vsize);
return true;
localerror:
ir_value_delete(slot);
return false;
}
bool ir_function_allocate_locals(ir_function *self)
{
size_t i, a;
bool retval = true;
size_t pos;
ir_value *slot;
const ir_value *v;
function_allocator alloc;
if (!vec_size(self->locals) && !vec_size(self->values))
return true;
alloc.locals = NULL;
alloc.sizes = NULL;
alloc.positions = NULL;
for (i = 0; i < vec_size(self->locals); ++i)
{
if (!function_allocator_alloc(&alloc, self->locals[i]))
goto error;
}
/* Allocate a slot for any value that still exists */
for (i = 0; i < vec_size(self->values); ++i)
{
v = self->values[i];
if (!vec_size(v->life))
continue;
for (a = 0; a < vec_size(alloc.locals); ++a)
{
slot = alloc.locals[a];
if (ir_values_overlap(v, slot))
continue;
if (!ir_value_life_merge_into(slot, v))
goto error;
/* adjust size for this slot */
if (alloc.sizes[a] < type_sizeof[v->vtype])
alloc.sizes[a] = type_sizeof[v->vtype];
self->values[i]->code.local = a;
break;
}
if (a >= vec_size(alloc.locals)) {
self->values[i]->code.local = vec_size(alloc.locals);
if (!function_allocator_alloc(&alloc, v))
goto error;
}
}
if (!alloc.sizes) {
goto cleanup;
}
/* Adjust slot positions based on sizes */
vec_push(alloc.positions, 0);
if (vec_size(alloc.sizes))
pos = alloc.positions[0] + alloc.sizes[0];
else
pos = 0;
for (i = 1; i < vec_size(alloc.sizes); ++i)
{
pos = alloc.positions[i-1] + alloc.sizes[i-1];
vec_push(alloc.positions, pos);
}
self->allocated_locals = pos + vec_last(alloc.sizes);
/* Take over the actual slot positions */
for (i = 0; i < vec_size(self->values); ++i) {
self->values[i]->code.local = alloc.positions[self->values[i]->code.local];
}
goto cleanup;
error:
retval = false;
cleanup:
for (i = 0; i < vec_size(alloc.locals); ++i)
ir_value_delete(alloc.locals[i]);
vec_free(alloc.locals);
vec_free(alloc.sizes);
vec_free(alloc.positions);
return retval;
}
/* Get information about which operand
* is read from, or written to.
*/
static void ir_op_read_write(int op, size_t *read, size_t *write)
{
switch (op)
{
case VINSTR_JUMP:
case INSTR_GOTO:
*write = 0;
*read = 0;
break;
case INSTR_IF:
case INSTR_IFNOT:
#if 0
case INSTR_IF_S:
case INSTR_IFNOT_S:
#endif
case INSTR_RETURN:
case VINSTR_COND:
*write = 0;
*read = 1;
break;
case INSTR_STOREP_F:
case INSTR_STOREP_V:
case INSTR_STOREP_S:
case INSTR_STOREP_ENT:
case INSTR_STOREP_FLD:
case INSTR_STOREP_FNC:
*write = 0;
*read = 7;
break;
default:
*write = 1;
*read = 6;
break;
};
}
static bool ir_block_living_add_instr(ir_block *self, size_t eid)
{
size_t i;
bool changed = false;
bool tempbool;
for (i = 0; i != vec_size(self->living); ++i)
{
tempbool = ir_value_life_merge(self->living[i], eid);
/* debug
if (tempbool)
irerror(self->context, "block_living_add_instr() value instruction added %s: %i", self->living[i]->_name, (int)eid);
*/
changed = changed || tempbool;
}
return changed;
}
static bool ir_block_life_prop_previous(ir_block* self, ir_block *prev, bool *changed)
{
size_t i;
/* values which have been read in a previous iteration are now
* in the "living" array even if the previous block doesn't use them.
* So we have to remove whatever does not exist in the previous block.
* They will be re-added on-read, but the liferange merge won't cause
* a change.
*/
for (i = 0; i < vec_size(self->living); ++i)
{
if (!vec_ir_value_find(prev->living, self->living[i], NULL)) {
vec_remove(self->living, i, 1);
--i;
}
}
/* Whatever the previous block still has in its living set
* must now be added to ours as well.
*/
for (i = 0; i < vec_size(prev->living); ++i)
{
if (vec_ir_value_find(self->living, prev->living[i], NULL))
continue;
vec_push(self->living, prev->living[i]);
/*
irerror(self->contextt from prev: %s", self->label, prev->living[i]->_name);
*/
}
return true;
}
static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *changed)
{
ir_instr *instr;
ir_value *value;
bool tempbool;
size_t i, o, p;
/* bitmasks which operands are read from or written to */
size_t read, write;
char dbg_ind[16] = { '#', '0' };
(void)dbg_ind;
if (prev)
{
if (!ir_block_life_prop_previous(self, prev, changed))
return false;
}
i = vec_size(self->instr);
while (i)
{ --i;
instr = self->instr[i];
/* PHI operands are always read operands */
for (p = 0; p < vec_size(instr->phi); ++p)
{
value = instr->phi[p].value;
if (value->memberof)
value = value->memberof;
if (!vec_ir_value_find(self->living, value, NULL))
vec_push(self->living, value);
}
/* call params are read operands too */
for (p = 0; p < vec_size(instr->params); ++p)
{
value = instr->params[p];
if (value->memberof)
value = value->memberof;
if (!vec_ir_value_find(self->living, value, NULL))
vec_push(self->living, value);
}
/* See which operands are read and write operands */
ir_op_read_write(instr->opcode, &read, &write);
if (instr->opcode == INSTR_MUL_VF)
{
/* the float source will get an additional lifetime */
tempbool = ir_value_life_merge(instr->_ops[2], instr->eid+1);
*changed = *changed || tempbool;
}
else if (instr->opcode == INSTR_MUL_FV)
{
/* the float source will get an additional lifetime */
tempbool = ir_value_life_merge(instr->_ops[1], instr->eid+1);
*changed = *changed || tempbool;
}
/* Go through the 3 main operands */
for (o = 0; o < 3; ++o)
{
if (!instr->_ops[o]) /* no such operand */
continue;
value = instr->_ops[o];
if (value->memberof)
value = value->memberof;
/* We only care about locals */
/* we also calculate parameter liferanges so that locals
* can take up parameter slots */
if (value->store != store_value &&
value->store != store_local &&
value->store != store_param)
continue;
/* read operands */
if (read & (1<<o))
{
if (!vec_ir_value_find(self->living, value, NULL))
vec_push(self->living, value);
}
/* write operands */
/* When we write to a local, we consider it "dead" for the
* remaining upper part of the function, since in SSA a value
* can only be written once (== created)
*/
if (write & (1<<o))
{
size_t idx;
bool in_living = vec_ir_value_find(self->living, value, &idx);
if (!in_living)
{
/* If the value isn't alive it hasn't been read before... */
/* TODO: See if the warning can be emitted during parsing or AST processing
* otherwise have warning printed here.
* IF printing a warning here: include filecontext_t,
* and make sure it's only printed once
* since this function is run multiple times.
*/
/* For now: debug info: */
/* con_err( "Value only written %s\n", value->name); */
tempbool = ir_value_life_merge(value, instr->eid);
*changed = *changed || tempbool;
/*
ir_instr_dump(instr, dbg_ind, printf);
abort();
*/
} else {
/* since 'living' won't contain it
* anymore, merge the value, since
* (A) doesn't.
*/
tempbool = ir_value_life_merge(value, instr->eid);
/*
if (tempbool)
con_err( "value added id %s %i\n", value->name, (int)instr->eid);
*/
*changed = *changed || tempbool;
/* Then remove */
vec_remove(self->living, idx, 1);
}
}
}
/* (A) */
tempbool = ir_block_living_add_instr(self, instr->eid);
/*con_err( "living added values\n");*/
*changed = *changed || tempbool;
}
if (self->run_id == self->owner->run_id)
return true;
self->run_id = self->owner->run_id;
for (i = 0; i < vec_size(self->entries); ++i)
{
ir_block *entry = self->entries[i];
ir_block_life_propagate(entry, self, changed);
}
return true;
}
/***********************************************************************
*IR Code-Generation
*
* Since the IR has the convention of putting 'write' operands
* at the beginning, we have to rotate the operands of instructions
* properly in order to generate valid QCVM code.
*
* Having destinations at a fixed position is more convenient. In QC
* this is *mostly* OPC, but FTE adds at least 2 instructions which
* read from from OPA, and store to OPB rather than OPC. Which is
* partially the reason why the implementation of these instructions
* in darkplaces has been delayed for so long.
*
* Breaking conventions is annoying...
*/
static bool ir_builder_gen_global(ir_builder *self, ir_value *global, bool islocal);
static bool gen_global_field(ir_value *global)
{
if (global->isconst)
{
ir_value *fld = global->constval.vpointer;
if (!fld) {
irerror(global->context, "Invalid field constant with no field: %s", global->name);
return false;
}
/* Now, in this case, a relocation would be impossible to code
* since it looks like this:
* .vector v = origin; <- parse error, wtf is 'origin'?
* .vector origin;
*
* But we will need a general relocation support later anyway
* for functions... might as well support that here.
*/
if (!fld->code.globaladdr) {
irerror(global->context, "FIXME: Relocation support");
return false;
}
/* copy the field's value */
ir_value_code_setaddr(global, vec_size(code_globals));
vec_push(code_globals, code_globals[fld->code.globaladdr]);
if (global->fieldtype == TYPE_VECTOR) {
vec_push(code_globals, code_globals[fld->code.globaladdr]+1);
vec_push(code_globals, code_globals[fld->code.globaladdr]+2);
}
}
else
{
ir_value_code_setaddr(global, vec_size(code_globals));
vec_push(code_globals, 0);
if (global->fieldtype == TYPE_VECTOR) {
vec_push(code_globals, 0);
vec_push(code_globals, 0);
}
}
if (global->code.globaladdr < 0)
return false;
return true;
}
static bool gen_global_pointer(ir_value *global)
{
if (global->isconst)
{
ir_value *target = global->constval.vpointer;
if (!target) {
irerror(global->context, "Invalid pointer constant: %s", global->name);
/* NULL pointers are pointing to the NULL constant, which also
* sits at address 0, but still has an ir_value for itself.
*/
return false;
}
/* Here, relocations ARE possible - in fteqcc-enhanced-qc:
* void() foo; <- proto
* void() *fooptr = &foo;
* void() foo = { code }
*/
if (!target->code.globaladdr) {
/* FIXME: Check for the constant nullptr ir_value!
* because then code.globaladdr being 0 is valid.
*/
irerror(global->context, "FIXME: Relocation support");
return false;
}
ir_value_code_setaddr(global, vec_size(code_globals));
vec_push(code_globals, target->code.globaladdr);
}
else
{
ir_value_code_setaddr(global, vec_size(code_globals));
vec_push(code_globals, 0);
}
if (global->code.globaladdr < 0)
return false;
return true;
}
static bool gen_blocks_recursive(ir_function *func, ir_block *block)
{
prog_section_statement stmt;
ir_instr *instr;
ir_block *target;
ir_block *ontrue;
ir_block *onfalse;
size_t stidx;
size_t i;
tailcall:
block->generated = true;
block->code_start = vec_size(code_statements);
for (i = 0; i < vec_size(block->instr); ++i)
{
instr = block->instr[i];
if (instr->opcode == VINSTR_PHI) {
irerror(block->context, "cannot generate virtual instruction (phi)");
return false;
}
if (instr->opcode == VINSTR_JUMP) {
target = instr->bops[0];
/* for uncoditional jumps, if the target hasn't been generated
* yet, we generate them right here.
*/
if (!target->generated) {
block = target;
goto tailcall;
}
/* otherwise we generate a jump instruction */
stmt.opcode = INSTR_GOTO;
stmt.o1.s1 = (target->code_start) - vec_size(code_statements);
stmt.o2.s1 = 0;
stmt.o3.s1 = 0;
vec_push(code_statements, stmt);
/* no further instructions can be in this block */
return true;
}
if (instr->opcode == VINSTR_COND) {
ontrue = instr->bops[0];
onfalse = instr->bops[1];
/* TODO: have the AST signal which block should
* come first: eg. optimize IFs without ELSE...
*/
stmt.o1.u1 = ir_value_code_addr(instr->_ops[0]);
stmt.o2.u1 = 0;
stmt.o3.s1 = 0;
if (ontrue->generated) {
stmt.opcode = INSTR_IF;
stmt.o2.s1 = (ontrue->code_start) - vec_size(code_statements);
vec_push(code_statements, stmt);
}
if (onfalse->generated) {
stmt.opcode = INSTR_IFNOT;
stmt.o2.s1 = (onfalse->code_start) - vec_size(code_statements);
vec_push(code_statements, stmt);
}
if (!ontrue->generated) {
if (onfalse->generated) {
block = ontrue;
goto tailcall;
}
}
if (!onfalse->generated) {
if (ontrue->generated) {
block = onfalse;
goto tailcall;
}
}
/* neither ontrue nor onfalse exist */
stmt.opcode = INSTR_IFNOT;
if (!instr->likely) {
/* Honor the likelyhood hint */
ir_block *tmp = onfalse;
stmt.opcode = INSTR_IF;
onfalse = ontrue;
ontrue = tmp;
}
stidx = vec_size(code_statements);
vec_push(code_statements, stmt);
/* on false we jump, so add ontrue-path */
if (!gen_blocks_recursive(func, ontrue))
return false;
/* fixup the jump address */
code_statements[stidx].o2.s1 = vec_size(code_statements) - stidx;
/* generate onfalse path */
if (onfalse->generated) {
/* fixup the jump address */
code_statements[stidx].o2.s1 = (onfalse->code_start) - (stidx);
stmt.opcode = vec_last(code_statements).opcode;
if (stmt.opcode == INSTR_GOTO ||
stmt.opcode == INSTR_IF ||
stmt.opcode == INSTR_IFNOT ||
stmt.opcode == INSTR_RETURN ||
stmt.opcode == INSTR_DONE)
{
/* no use jumping from here */
return true;
}
/* may have been generated in the previous recursive call */
stmt.opcode = INSTR_GOTO;
stmt.o1.s1 = (onfalse->code_start) - vec_size(code_statements);
stmt.o2.s1 = 0;
stmt.o3.s1 = 0;
vec_push(code_statements, stmt);
return true;
}
/* if not, generate now */
block = onfalse;
goto tailcall;
}
if (instr->opcode >= INSTR_CALL0 && instr->opcode <= INSTR_CALL8) {
/* Trivial call translation:
* copy all params to OFS_PARM*
* if the output's storetype is not store_return,
* add append a STORE instruction!
*
* NOTES on how to do it better without much trouble:
* -) The liferanges!
* Simply check the liferange of all parameters for
* other CALLs. For each param with no CALL in its
* liferange, we can store it in an OFS_PARM at
* generation already. This would even include later
* reuse.... probably... :)
*/
size_t p, first;
ir_value *retvalue;
first = vec_size(instr->params);
if (first > 8)
first = 8;
for (p = 0; p < first; ++p)
{
ir_value *param = instr->params[p];
stmt.opcode = INSTR_STORE_F;
stmt.o3.u1 = 0;
if (param->vtype == TYPE_FIELD)
stmt.opcode = field_store_instr[param->fieldtype];
else
stmt.opcode = type_store_instr[param->vtype];
stmt.o1.u1 = ir_value_code_addr(param);
stmt.o2.u1 = OFS_PARM0 + 3 * p;
vec_push(code_statements, stmt);
}
/* No whandle extparams */
first = vec_size(instr->params);
for (; p < first; ++p)
{
ir_builder *ir = func->owner;
ir_value *param = instr->params[p];
ir_value *target;
if (p-8 >= vec_size(ir->extparams)) {
irerror(instr->context, "Not enough extparam-globals have been created");
return false;
}
target = ir->extparams[p-8];
stmt.opcode = INSTR_STORE_F;
stmt.o3.u1 = 0;
if (param->vtype == TYPE_FIELD)
stmt.opcode = field_store_instr[param->fieldtype];
else
stmt.opcode = type_store_instr[param->vtype];
stmt.o1.u1 = ir_value_code_addr(param);
stmt.o2.u1 = ir_value_code_addr(target);
vec_push(code_statements, stmt);
}
stmt.opcode = INSTR_CALL0 + vec_size(instr->params);
if (stmt.opcode > INSTR_CALL8)
stmt.opcode = INSTR_CALL8;
stmt.o1.u1 = ir_value_code_addr(instr->_ops[1]);
stmt.o2.u1 = 0;
stmt.o3.u1 = 0;
vec_push(code_statements, stmt);
retvalue = instr->_ops[0];
if (retvalue && retvalue->store != store_return && vec_size(retvalue->life))
{
/* not to be kept in OFS_RETURN */
if (retvalue->vtype == TYPE_FIELD)
stmt.opcode = field_store_instr[retvalue->vtype];
else
stmt.opcode = type_store_instr[retvalue->vtype];
stmt.o1.u1 = OFS_RETURN;
stmt.o2.u1 = ir_value_code_addr(retvalue);
stmt.o3.u1 = 0;
vec_push(code_statements, stmt);
}
continue;
}
if (instr->opcode == INSTR_STATE) {
irerror(block->context, "TODO: state instruction");
return false;
}
stmt.opcode = instr->opcode;
stmt.o1.u1 = 0;
stmt.o2.u1 = 0;
stmt.o3.u1 = 0;
/* This is the general order of operands */
if (instr->_ops[0])
stmt.o3.u1 = ir_value_code_addr(instr->_ops[0]);
if (instr->_ops[1])
stmt.o1.u1 = ir_value_code_addr(instr->_ops[1]);
if (instr->_ops[2])
stmt.o2.u1 = ir_value_code_addr(instr->_ops[2]);
if (stmt.opcode == INSTR_RETURN || stmt.opcode == INSTR_DONE)
{
stmt.o1.u1 = stmt.o3.u1;
stmt.o3.u1 = 0;
}
else if ((stmt.opcode >= INSTR_STORE_F &&
stmt.opcode <= INSTR_STORE_FNC) ||
(stmt.opcode >= INSTR_STOREP_F &&
stmt.opcode <= INSTR_STOREP_FNC))
{
/* 2-operand instructions with A -> B */
stmt.o2.u1 = stmt.o3.u1;
stmt.o3.u1 = 0;
}
vec_push(code_statements, stmt);
}
return true;
}
static bool gen_function_code(ir_function *self)
{
ir_block *block;
prog_section_statement stmt;
/* Starting from entry point, we generate blocks "as they come"
* for now. Dead blocks will not be translated obviously.
*/
if (!vec_size(self->blocks)) {
irerror(self->context, "Function '%s' declared without body.", self->name);
return false;
}
block = self->blocks[0];
if (block->generated)
return true;
if (!gen_blocks_recursive(self, block)) {
irerror(self->context, "failed to generate blocks for '%s'", self->name);
return false;
}
/* otherwise code_write crashes since it debug-prints functions until AINSTR_END */
stmt.opcode = AINSTR_END;
stmt.o1.u1 = 0;
stmt.o2.u1 = 0;
stmt.o3.u1 = 0;
vec_push(code_statements, stmt);
return true;
}
static qcint ir_builder_filestring(ir_builder *ir, const char *filename)
{
/* NOTE: filename pointers are copied, we never strdup them,
* thus we can use pointer-comparison to find the string.
*/
size_t i;
qcint str;
for (i = 0; i < vec_size(ir->filenames); ++i) {
if (ir->filenames[i] == filename)
return ir->filestrings[i];
}
str = code_genstring(filename);
vec_push(ir->filenames, filename);
vec_push(ir->filestrings, str);
return str;
}
static bool gen_global_function(ir_builder *ir, ir_value *global)
{
prog_section_function fun;
ir_function *irfun;
size_t i;
size_t local_var_end;
if (!global->isconst || (!global->constval.vfunc))
{
irerror(global->context, "Invalid state of function-global: not constant: %s", global->name);
return false;
}
irfun = global->constval.vfunc;
fun.name = global->code.name;
fun.file = ir_builder_filestring(ir, global->context.file);
fun.profile = 0; /* always 0 */
fun.nargs = vec_size(irfun->params);
if (fun.nargs > 8)
fun.nargs = 8;
for (i = 0;i < 8; ++i) {
if (i >= fun.nargs)
fun.argsize[i] = 0;
else
fun.argsize[i] = type_sizeof[irfun->params[i]];
}
fun.firstlocal = vec_size(code_globals);
local_var_end = fun.firstlocal;
for (i = 0; i < vec_size(irfun->locals); ++i) {
if (!ir_builder_gen_global(ir, irfun->locals[i], true)) {
irerror(irfun->locals[i]->context, "Failed to generate local %s", irfun->locals[i]->name);
return false;
}
}
if (vec_size(irfun->locals)) {
ir_value *last = vec_last(irfun->locals);
local_var_end = last->code.globaladdr;
local_var_end += type_sizeof[last->vtype];
}
for (i = 0; i < vec_size(irfun->values); ++i)
{
/* generate code.globaladdr for ssa values */
ir_value *v = irfun->values[i];
ir_value_code_setaddr(v, local_var_end + v->code.local);
}
for (i = 0; i < irfun->allocated_locals; ++i) {
/* fill the locals with zeros */
vec_push(code_globals, 0);
}
fun.locals = vec_size(code_globals) - fun.firstlocal;
if (irfun->builtin)
fun.entry = irfun->builtin;
else {
irfun->code_function_def = vec_size(code_functions);
fun.entry = vec_size(code_statements);
}
vec_push(code_functions, fun);
return true;
}
static void ir_gen_extparam(ir_builder *ir)
{
prog_section_def def;
ir_value *global;
char name[128];
snprintf(name, sizeof(name), "EXTPARM#%i", (int)(vec_size(ir->extparams)+8));
global = ir_value_var(name, store_global, TYPE_VECTOR);
def.name = code_genstring(name);
def.type = TYPE_VECTOR;
def.offset = vec_size(code_globals);
vec_push(code_defs, def);
ir_value_code_setaddr(global, def.offset);
vec_push(code_globals, 0);
vec_push(code_globals, 0);
vec_push(code_globals, 0);
vec_push(ir->extparams, global);
}
static bool gen_function_extparam_copy(ir_function *self)
{
size_t i, ext, numparams;
ir_builder *ir = self->owner;
ir_value *ep;
prog_section_statement stmt;
numparams = vec_size(self->params);
if (!numparams)
return true;
stmt.opcode = INSTR_STORE_F;
stmt.o3.s1 = 0;
for (i = 8; i < numparams; ++i) {
ext = i - 8;
if (ext >= vec_size(ir->extparams))
ir_gen_extparam(ir);
ep = ir->extparams[ext];
stmt.opcode = type_store_instr[self->locals[i]->vtype];
if (self->locals[i]->vtype == TYPE_FIELD &&
self->locals[i]->fieldtype == TYPE_VECTOR)
{
stmt.opcode = INSTR_STORE_V;
}
stmt.o1.u1 = ir_value_code_addr(ep);
stmt.o2.u1 = ir_value_code_addr(self->locals[i]);
vec_push(code_statements, stmt);
}
return true;
}
static bool gen_global_function_code(ir_builder *ir, ir_value *global)
{
prog_section_function *fundef;
ir_function *irfun;
irfun = global->constval.vfunc;
if (!irfun) {
irwarning(global->context, WARN_IMPLICIT_FUNCTION_POINTER,
"function `%s` has no body and in QC implicitly becomes a function-pointer", global->name);
/* this was a function pointer, don't generate code for those */
return true;
}
if (irfun->builtin)
return true;
if (irfun->code_function_def < 0) {
irerror(irfun->context, "`%s`: IR global wasn't generated, failed to access function-def", irfun->name);
return false;
}
fundef = &code_functions[irfun->code_function_def];
fundef->entry = vec_size(code_statements);
if (!gen_function_extparam_copy(irfun)) {
irerror(irfun->context, "Failed to generate extparam-copy code for function %s", irfun->name);
return false;
}
if (!gen_function_code(irfun)) {
irerror(irfun->context, "Failed to generate code for function %s", irfun->name);
return false;
}
return true;
}
static bool ir_builder_gen_global(ir_builder *self, ir_value *global, bool islocal)
{
size_t i;
int32_t *iptr;
prog_section_def def;
def.type = global->vtype;
def.offset = vec_size(code_globals);
if (global->name) {
if (global->name[0] == '#') {
if (!self->str_immediate)
self->str_immediate = code_genstring("IMMEDIATE");
def.name = global->code.name = self->str_immediate;
}
else
def.name = global->code.name = code_genstring(global->name);
}
else
def.name = 0;
switch (global->vtype)
{
case TYPE_VOID:
if (!strcmp(global->name, "end_sys_globals")) {
/* TODO: remember this point... all the defs before this one
* should be checksummed and added to progdefs.h when we generate it.
*/
}
else if (!strcmp(global->name, "end_sys_fields")) {
/* TODO: same as above but for entity-fields rather than globsl
*/
}
else
irwarning(global->context, WARN_VOID_VARIABLES, "unrecognized variable of type void `%s`",
global->name);
/* I'd argue setting it to 0 is sufficient, but maybe some depend on knowing how far
* the system fields actually go? Though the engine knows this anyway...
* Maybe this could be an -foption
* fteqcc creates data for end_sys_* - of size 1, so let's do the same
*/
ir_value_code_setaddr(global, vec_size(code_globals));
vec_push(code_globals, 0);
/* Add the def */
vec_push(code_defs, def);
return true;
case TYPE_POINTER:
vec_push(code_defs, def);
return gen_global_pointer(global);
case TYPE_FIELD:
vec_push(code_defs, def);
return gen_global_field(global);
case TYPE_ENTITY:
/* fall through */
case TYPE_FLOAT:
{
ir_value_code_setaddr(global, vec_size(code_globals));
if (global->isconst) {
iptr = (int32_t*)&global->constval.ivec[0];
vec_push(code_globals, *iptr);
} else {
vec_push(code_globals, 0);
if (!islocal)
def.type |= DEF_SAVEGLOBAL;
}
vec_push(code_defs, def);
return global->code.globaladdr >= 0;
}
case TYPE_STRING:
{
ir_value_code_setaddr(global, vec_size(code_globals));
if (global->isconst) {
vec_push(code_globals, code_genstring(global->constval.vstring));
} else {
vec_push(code_globals, 0);
if (!islocal)
def.type |= DEF_SAVEGLOBAL;
}
vec_push(code_defs, def);
return global->code.globaladdr >= 0;
}
case TYPE_VECTOR:
{
size_t d;
ir_value_code_setaddr(global, vec_size(code_globals));
if (global->isconst) {
iptr = (int32_t*)&global->constval.ivec[0];
vec_push(code_globals, iptr[0]);
if (global->code.globaladdr < 0)
return false;
for (d = 1; d < type_sizeof[global->vtype]; ++d)
{
vec_push(code_globals, iptr[d]);
}
} else {
vec_push(code_globals, 0);
if (global->code.globaladdr < 0)
return false;
for (d = 1; d < type_sizeof[global->vtype]; ++d)
{
vec_push(code_globals, 0);
}
if (!islocal)
def.type |= DEF_SAVEGLOBAL;
}
vec_push(code_defs, def);
return global->code.globaladdr >= 0;
}
case TYPE_FUNCTION:
ir_value_code_setaddr(global, vec_size(code_globals));
if (!global->isconst) {
vec_push(code_globals, 0);
if (global->code.globaladdr < 0)
return false;
} else {
vec_push(code_globals, vec_size(code_functions));
if (!gen_global_function(self, global))
return false;
if (!islocal)
def.type |= DEF_SAVEGLOBAL;
}
vec_push(code_defs, def);
return true;
case TYPE_VARIANT:
/* assume biggest type */
ir_value_code_setaddr(global, vec_size(code_globals));
vec_push(code_globals, 0);
for (i = 1; i < type_sizeof[TYPE_VARIANT]; ++i)
vec_push(code_globals, 0);
return true;
default:
/* refuse to create 'void' type or any other fancy business. */
irerror(global->context, "Invalid type for global variable `%s`: %s",
global->name, type_name[global->vtype]);
return false;
}
}
static bool ir_builder_gen_field(ir_builder *self, ir_value *field)
{
prog_section_def def;
prog_section_field fld;
def.type = field->vtype;
def.offset = vec_size(code_globals);
/* create a global named the same as the field */
if (opts_standard == COMPILER_GMQCC) {
/* in our standard, the global gets a dot prefix */
size_t len = strlen(field->name);
char name[1024];
/* we really don't want to have to allocate this, and 1024
* bytes is more than enough for a variable/field name
*/
if (len+2 >= sizeof(name)) {
irerror(field->context, "invalid field name size: %u", (unsigned int)len);
return false;
}
name[0] = '.';
memcpy(name+1, field->name, len); /* no strncpy - we used strlen above */
name[len+1] = 0;
def.name = code_genstring(name);
fld.name = def.name + 1; /* we reuse that string table entry */
} else {
/* in plain QC, there cannot be a global with the same name,
* and so we also name the global the same.
* FIXME: fteqcc should create a global as well
* check if it actually uses the same name. Probably does
*/
def.name = code_genstring(field->name);
fld.name = def.name;
}
field->code.name = def.name;
vec_push(code_defs, def);
fld.type = field->fieldtype;
if (fld.type == TYPE_VOID) {
irerror(field->context, "field is missing a type: %s - don't know its size", field->name);
return false;
}
fld.offset = code_alloc_field(type_sizeof[field->fieldtype]);
vec_push(code_fields, fld);
ir_value_code_setaddr(field, vec_size(code_globals));
vec_push(code_globals, fld.offset);
if (fld.type == TYPE_VECTOR) {
vec_push(code_globals, fld.offset+1);
vec_push(code_globals, fld.offset+2);
}
return field->code.globaladdr >= 0;
}
bool ir_builder_generate(ir_builder *self, const char *filename)
{
prog_section_statement stmt;
size_t i;
code_init();
for (i = 0; i < vec_size(self->globals); ++i)
{
if (!ir_builder_gen_global(self, self->globals[i], false)) {
return false;
}
}
for (i = 0; i < vec_size(self->fields); ++i)
{
if (!ir_builder_gen_field(self, self->fields[i])) {
return false;
}
}
/* generate function code */
for (i = 0; i < vec_size(self->globals); ++i)
{
if (self->globals[i]->vtype == TYPE_FUNCTION) {
if (!gen_global_function_code(self, self->globals[i])) {
return false;
}
}
}
/* DP errors if the last instruction is not an INSTR_DONE
* and for debugging purposes we add an additional AINSTR_END
* to the end of functions, so here it goes:
*/
stmt.opcode = INSTR_DONE;
stmt.o1.u1 = 0;
stmt.o2.u1 = 0;
stmt.o3.u1 = 0;
vec_push(code_statements, stmt);
if (!opts_pp_only)
con_out("writing '%s'...\n", filename);
return code_write(filename);
}
/***********************************************************************
*IR DEBUG Dump functions...
*/
#define IND_BUFSZ 1024
#ifdef WIN32
# define strncat(dst, src, sz) strncat_s(dst, sz, src, _TRUNCATE)
#endif
const char *qc_opname(int op)
{
if (op < 0) return "<INVALID>";
if (op < ( sizeof(asm_instr) / sizeof(asm_instr[0]) ))
return asm_instr[op].m;
switch (op) {
case VINSTR_PHI: return "PHI";
case VINSTR_JUMP: return "JUMP";
case VINSTR_COND: return "COND";
default: return "<UNK>";
}
}
void ir_builder_dump(ir_builder *b, int (*oprintf)(const char*, ...))
{
size_t i;
char indent[IND_BUFSZ];
indent[0] = '\t';
indent[1] = 0;
oprintf("module %s\n", b->name);
for (i = 0; i < vec_size(b->globals); ++i)
{
oprintf("global ");
if (b->globals[i]->isconst)
oprintf("%s = ", b->globals[i]->name);
ir_value_dump(b->globals[i], oprintf);
oprintf("\n");
}
for (i = 0; i < vec_size(b->functions); ++i)
ir_function_dump(b->functions[i], indent, oprintf);
oprintf("endmodule %s\n", b->name);
}
void ir_function_dump(ir_function *f, char *ind,
int (*oprintf)(const char*, ...))
{
size_t i;
if (f->builtin != 0) {
oprintf("%sfunction %s = builtin %i\n", ind, f->name, -f->builtin);
return;
}
oprintf("%sfunction %s\n", ind, f->name);
strncat(ind, "\t", IND_BUFSZ);
if (vec_size(f->locals))
{
oprintf("%s%i locals:\n", ind, (int)vec_size(f->locals));
for (i = 0; i < vec_size(f->locals); ++i) {
oprintf("%s\t", ind);
ir_value_dump(f->locals[i], oprintf);
oprintf("\n");
}
}
oprintf("%sliferanges:\n", ind);
for (i = 0; i < vec_size(f->locals); ++i) {
size_t l;
ir_value *v = f->locals[i];
oprintf("%s\t%s: unique ", ind, v->name);
for (l = 0; l < vec_size(v->life); ++l) {
oprintf("[%i,%i] ", v->life[l].start, v->life[l].end);
}
oprintf("\n");
}
for (i = 0; i < vec_size(f->values); ++i) {
size_t l;
ir_value *v = f->values[i];
oprintf("%s\t%s: @%i ", ind, v->name, (int)v->code.local);
for (l = 0; l < vec_size(v->life); ++l) {
oprintf("[%i,%i] ", v->life[l].start, v->life[l].end);
}
oprintf("\n");
}
if (vec_size(f->blocks))
{
oprintf("%slife passes (check): %i\n", ind, (int)f->run_id);
for (i = 0; i < vec_size(f->blocks); ++i) {
if (f->blocks[i]->run_id != f->run_id) {
oprintf("%slife pass check fail! %i != %i\n", ind, (int)f->blocks[i]->run_id, (int)f->run_id);
}
ir_block_dump(f->blocks[i], ind, oprintf);
}
}
ind[strlen(ind)-1] = 0;
oprintf("%sendfunction %s\n", ind, f->name);
}
void ir_block_dump(ir_block* b, char *ind,
int (*oprintf)(const char*, ...))
{
size_t i;
oprintf("%s:%s\n", ind, b->label);
strncat(ind, "\t", IND_BUFSZ);
for (i = 0; i < vec_size(b->instr); ++i)
ir_instr_dump(b->instr[i], ind, oprintf);
ind[strlen(ind)-1] = 0;
}
void dump_phi(ir_instr *in, char *ind,
int (*oprintf)(const char*, ...))
{
size_t i;
oprintf("%s <- phi ", in->_ops[0]->name);
for (i = 0; i < vec_size(in->phi); ++i)
{
oprintf("([%s] : %s) ", in->phi[i].from->label,
in->phi[i].value->name);
}
oprintf("\n");
}
void ir_instr_dump(ir_instr *in, char *ind,
int (*oprintf)(const char*, ...))
{
size_t i;
const char *comma = NULL;
oprintf("%s (%i) ", ind, (int)in->eid);
if (in->opcode == VINSTR_PHI) {
dump_phi(in, ind, oprintf);
return;
}
strncat(ind, "\t", IND_BUFSZ);
if (in->_ops[0] && (in->_ops[1] || in->_ops[2])) {
ir_value_dump(in->_ops[0], oprintf);
if (in->_ops[1] || in->_ops[2])
oprintf(" <- ");
}
if (in->opcode == INSTR_CALL0) {
oprintf("CALL%i\t", vec_size(in->params));
} else
oprintf("%s\t", qc_opname(in->opcode));
if (in->_ops[0] && !(in->_ops[1] || in->_ops[2])) {
ir_value_dump(in->_ops[0], oprintf);
comma = ",\t";
}
else
{
for (i = 1; i != 3; ++i) {
if (in->_ops[i]) {
if (comma)
oprintf(comma);
ir_value_dump(in->_ops[i], oprintf);
comma = ",\t";
}
}
}
if (in->bops[0]) {
if (comma)
oprintf(comma);
oprintf("[%s]", in->bops[0]->label);
comma = ",\t";
}
if (in->bops[1])
oprintf("%s[%s]", comma, in->bops[1]->label);
if (vec_size(in->params)) {
oprintf("\tparams: ");
for (i = 0; i != vec_size(in->params); ++i) {
oprintf("%s, ", in->params[i]->name);
}
}
oprintf("\n");
ind[strlen(ind)-1] = 0;
}
void ir_value_dump_string(const char *str, int (*oprintf)(const char*, ...))
{
oprintf("\"");
for (; *str; ++str) {
switch (*str) {
case '\n': oprintf("\\n"); break;
case '\r': oprintf("\\r"); break;
case '\t': oprintf("\\t"); break;
case '\v': oprintf("\\v"); break;
case '\f': oprintf("\\f"); break;
case '\b': oprintf("\\b"); break;
case '\a': oprintf("\\a"); break;
case '\\': oprintf("\\\\"); break;
case '"': oprintf("\\\""); break;
default: oprintf("%c", *str); break;
}
}
oprintf("\"");
}
void ir_value_dump(ir_value* v, int (*oprintf)(const char*, ...))
{
if (v->isconst) {
switch (v->vtype) {
default:
case TYPE_VOID:
oprintf("(void)");
break;
case TYPE_FUNCTION:
oprintf("fn:%s", v->name);
break;
case TYPE_FLOAT:
oprintf("%g", v->constval.vfloat);
break;
case TYPE_VECTOR:
oprintf("'%g %g %g'",
v->constval.vvec.x,
v->constval.vvec.y,
v->constval.vvec.z);
break;
case TYPE_ENTITY:
oprintf("(entity)");
break;
case TYPE_STRING:
ir_value_dump_string(v->constval.vstring, oprintf);
break;
#if 0
case TYPE_INTEGER:
oprintf("%i", v->constval.vint);
break;
#endif
case TYPE_POINTER:
oprintf("&%s",
v->constval.vpointer->name);
break;
}
} else {
oprintf("%s", v->name);
}
}
void ir_value_dump_life(const ir_value *self, int (*oprintf)(const char*,...))
{
size_t i;
oprintf("Life of %12s:", self->name);
for (i = 0; i < vec_size(self->life); ++i)
{
oprintf(" + [%i, %i]\n", self->life[i].start, self->life[i].end);
}
}
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