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-rw-r--r--compiler.c194
1 files changed, 153 insertions, 41 deletions
diff --git a/compiler.c b/compiler.c
index 8c48961..9758c39 100644
--- a/compiler.c
+++ b/compiler.c
@@ -754,7 +754,7 @@ char *_op_get_location(Variable *var) {
out = int_to_str(var->offset);
} else if(var->location == LOC_STCK) {
// Invert because stack grows down (and stack index starts at 1)
- out = _gen_address("", "rbp", "", 0, -var->offset, false);
+ out = _gen_address("", "rbp", "", 0, var->offset, false);
} else if (var->location == LOC_DATA) {
// Stored in data sec
char *name = _var_get_datalabel(var);
@@ -1097,7 +1097,7 @@ char *_var_get_store(CompData *out, Variable *store) {
return _gen_address(PREFIXES[_var_size(store) - 1], name, "", 0, 0, true);
free(name);
} else if (store->location < 0) {
- return _gen_address(PREFIXES[_var_size(store) - 1], "rbp", "", 0, -store->offset, false);
+ return _gen_address(PREFIXES[_var_size(store) - 1], "rbp", "", 0, store->offset, false);
} else {
return _op_get_location(store);
}
@@ -1155,7 +1155,7 @@ char *_var_get_from(CompData *out, Variable *store, Variable *from) {
free(name);
} else {
// from on stack
- mov_from = _gen_address(PREFIXES[_var_size(from) - 1], "rbp", "", 0, -from->offset, false);
+ mov_from = _gen_address(PREFIXES[_var_size(from) - 1], "rbp", "", 0, from->offset, false);
}
// Match sign of data if required.
@@ -2409,6 +2409,11 @@ int tnsl_next_non_nl(Vector *tokens, size_t pos) {
return pos;
}
+// Returns a variable which can be constructed into
+// a type.
+// name = fully qualified type name
+// location = next token after type
+// ptr_chain = full pointer chain of the type
Variable tnsl_parse_type(Vector *tokens, size_t cur) {
Vector ftn = vect_init(sizeof(char));
Vector ptr = vect_init(sizeof(int));
@@ -3292,9 +3297,20 @@ void p1_size_type (Module *root, Type *t) {
}
void p1_resolve_func_types(Module *root, Function *func) {
- for (size_t i = 0; i < func->outputs.count; i++) {
- Variable *var = vect_get(&func->outputs, i);
- Artifact rtn = art_from_str(var->name, '.');
+
+ int reg = 1;
+ int stack_accum = 0;
+ for (size_t i = 0; i < func->inputs.count; i++) {
+ Variable *var = vect_get(&func->inputs, i);
+ char *n_end = strchr(var->name, ' ');
+
+ if (n_end == NULL) {
+ printf("COMPILER ERROR: Did not properly assure function %s had all parameters with both name and RTN\n\n", func->name);
+ p1_error = true;
+ break;
+ }
+
+ Artifact rtn = art_from_str(n_end + 1, '.');
Type *t = mod_find_type(root, &rtn);
if(t == NULL) {
@@ -3307,23 +3323,42 @@ void p1_resolve_func_types(Module *root, Function *func) {
art_end(&rtn);
- Vector name = vect_from_string(t->name);
+ *n_end = 0;
+ Vector name = vect_from_string(var->name);
free(var->name);
var->name = vect_as_string(&name);
var->type = t;
- }
-
- for (size_t i = 0; i < func->inputs.count; i++) {
- Variable *var = vect_get(&func->inputs, i);
- char *n_end = strchr(var->name, ' ');
-
- if (n_end == NULL) {
- printf("COMPILER ERROR: Did not properly assure function %s had all parameters with both name and RTN\n\n", func->name);
- p1_error = true;
- break;
+
+ // Check where the input should be read from
+ if (
+ (
+ // is struct
+ !is_inbuilt(var->type->name)
+ && // and not by reference
+ var->ptr_chain.count == 0
+ )
+ || // or we are an array with predefined size (stack array)
+ _var_ptr_type(var) > 1
+ || // or we ran out of registers
+ reg > 6
+ ) {
+ // The output should be stored on the stack
+ var->location = LOC_STCK;
+ var->offset = stack_accum;
+ stack_accum += _var_pure_size(var);
+ } else {
+ // The output should be stored in a register
+ var->location = reg;
+ var->offset = 0;
+ reg++;
}
-
- Artifact rtn = art_from_str(n_end + 1, '.');
+ }
+
+ reg = 1;
+ // Stack accum not reset because the stack would get clobbered
+ for (size_t i = 0; i < func->outputs.count; i++) {
+ Variable *var = vect_get(&func->outputs, i);
+ Artifact rtn = art_from_str(var->name, '.');
Type *t = mod_find_type(root, &rtn);
if(t == NULL) {
@@ -3336,11 +3371,34 @@ void p1_resolve_func_types(Module *root, Function *func) {
art_end(&rtn);
- *n_end = 0;
- Vector name = vect_from_string(var->name);
+ Vector name = vect_from_string(t->name);
free(var->name);
var->name = vect_as_string(&name);
var->type = t;
+
+ // Check where the output should be stored
+ if (
+ (
+ // is struct
+ !is_inbuilt(var->type->name)
+ && // and not by reference
+ var->ptr_chain.count == 0
+ )
+ || // or we are an array with predefined size (stack array)
+ _var_ptr_type(var) > 1
+ || // or we ran out of registers
+ reg > 6
+ ) {
+ // The output should be stored on the stack
+ var->location = LOC_STCK;
+ var->offset = stack_accum;
+ stack_accum += _var_pure_size(var);
+ } else {
+ // The output should be stored in a register
+ var->location = reg;
+ var->offset = 0;
+ reg++;
+ }
}
}
@@ -3495,15 +3553,15 @@ Scope scope_subscope(Scope *s, char *name) {
// Scope variable creation and management
int _scope_next_stack_loc(Scope *s, int size) {
- int sum = 56 + size;
+ int sum = -56 - size;
if (s->parent != NULL)
sum = _scope_next_stack_loc(s->parent, size);
for (size_t i = 0; i < s->stack_vars.count; i++) {
Variable *v = vect_get(&s->stack_vars, i);
- if (v->offset + size > sum) {
- sum = v->offset + size;
+ if (v->offset - size < sum) {
+ sum = v->offset - size;
}
}
@@ -3560,7 +3618,7 @@ Variable scope_mk_tmp(Scope *s, CompData *data, Variable *v) {
if ((is_inbuilt(v->type->name) && p_typ < 1) || p_typ == PTYPE_PTR || p_typ == PTYPE_PTR) {
int regs = _scope_avail_reg(s);
- if (regs & (RMSK_B | RMSK_8 | RMSK_9)) {
+ if (regs & 0b111) {
if (regs & RMSK_B) {
out.location = 2;
@@ -3578,7 +3636,7 @@ Variable scope_mk_tmp(Scope *s, CompData *data, Variable *v) {
}
}
- int loc = _scope_next_stack_loc(s, _var_size(v));
+ int loc = _scope_next_stack_loc(s, _var_pure_size(v));
out.location = LOC_STCK;
out.offset = loc;
@@ -3601,23 +3659,76 @@ void _scope_free_tmp_reg(Scope *s, Variable *v) {
if (to_free->location == v->location) {
var_end(to_free);
vect_remove(&s->reg_vars, i);
+ i--;
}
}
}
+void _scope_free_stack_var(Scope *s, CompData *data, Variable *v) {
+ int new_top = -56;
+ int target_top = v->offset;
+ for (size_t i = 0; i < s->stack_vars.count; i++) {
+ Variable *to_free = vect_get(&s->stack_vars, i);
+ if(to_free->offset == target_top) {
+ var_end(to_free);
+ vect_remove(&s->stack_vars, i);
+ i--;
+ } else if (new_top > to_free->offset) {
+ new_top = to_free->offset;
+ }
+ }
+ if (new_top > target_top) {
+ // Restore rsp
+ vect_push_string(&data->text, "\tlea rsp, [rbp - ");
+ vect_push_free_string(&data->text, int_to_str(-new_top));
+ vect_push_string(&data->text, "]; Tmp variable removed\n");
+ }
+}
// Free a tmp variable in the scope
void scope_free_tmp(Scope *s, CompData *data, Variable *v) {
if (v->location > 0) {
_scope_free_tmp_reg(s, v);
+ } else {
+ _scope_free_stack_var(s, data, v);
}
var_end(v);
}
-void scope_free_all_tmp(Scope* s) {
+void scope_free_all_tmp(Scope* s, CompData *data) {
+ for (size_t i = 0; i < s->reg_vars.count; i++) {
+ Variable *to_free = vect_get(&s->reg_vars, i);
+ if (to_free->location < RMSK_10) {
+ var_end(to_free);
+ vect_remove(&s->reg_vars, i);
+ i--;
+ }
+ }
+ int new_top = 0;
+ for (size_t i = 0; i < s->stack_vars.count; i++) {
+ Variable *to_free = vect_get(&s->stack_vars, i);
+ if(strcmp(to_free->name, "#tmp")) {
+ var_end(to_free);
+ vect_remove(&s->stack_vars, i);
+ i--;
+
+ if (new_top == 0) {
+ new_top = -56;
+ }
+ } else if (new_top > to_free->offset) {
+ new_top = to_free->offset;
+ }
+ }
+
+ if (new_top > 0) {
+ // Restore rsp
+ vect_push_string(&data->text, "\tlea rsp, [rbp - ");
+ vect_push_free_string(&data->text, int_to_str(-new_top));
+ vect_push_string(&data->text, "]; All tmp free\n");
+ }
}
// Generate a new variable in the scope
@@ -3627,7 +3738,7 @@ void scope_mk_var(Scope *s, CompData *data, Variable *v) {
if ((is_inbuilt(v->type->name) && p_typ < 1) || p_typ == PTYPE_PTR || p_typ == PTYPE_PTR) {
int regs = _scope_avail_reg(s);
- if (regs > (RMSK_B & RMSK_8 & RMSK_9)) {
+ if (regs > 0b111) {
if (regs & RMSK_10) {
out.location = 11;
@@ -3650,12 +3761,15 @@ void scope_mk_var(Scope *s, CompData *data, Variable *v) {
}
}
- int loc = _scope_next_stack_loc(s, _var_size(v));
+ int loc = _scope_next_stack_loc(s, _var_pure_size(v));
out.location = LOC_STCK;
out.offset = loc;
- var_op_pure_set(data, &out, v);
+ vect_push_string(&data->text, "\tlea rsp, [rbp - ");
+ vect_push_free_string(&data->text, int_to_str(-loc));
+ vect_push_string(&data->text, "]; Stack variable\n");
+
vect_push(&s->stack_vars, &out);
}
@@ -4070,7 +4184,7 @@ Variable _eval(Scope *s, CompData *data, Vector *tokens, size_t start, size_t en
}
// TODO: Operator evaluation, variable members, literals, function calls
-Variable eval(Scope *s, CompData *out, Vector *tokens, size_t *pos, bool keep) {
+Variable eval(Scope *s, CompData *out, Vector *tokens, size_t *pos, bool keep, Variable *out_type) {
Variable store;
size_t start = *pos;
@@ -4090,16 +4204,13 @@ Variable eval(Scope *s, CompData *out, Vector *tokens, size_t *pos, bool keep) {
}
store = _eval(s, out, tokens, start, end);
- scope_free_all_tmp(s);
+ scope_free_all_tmp(s, out);
if (keep) {
- if(store.location == LOC_STCK || store.location == LOC_DATA) {
- Variable tmp;
- var_op_reference(out, &tmp, &store);
- var_end(&store);
- store = tmp;
- }
- var_chg_register(out, &store, 1);
+ Variable tmp = var_copy(out_type);
+ var_op_set(out, &tmp, &store);
+ var_end(&store);
+ store = tmp;
}
*pos = end;
@@ -4307,7 +4418,8 @@ void p2_compile_function(Module *root, CompData *out, Vector *tokens, size_t *po
if (f->outputs.count > 0) {
if (*pos + 1 < end && !tok_str_eq(t, "\n")) {
*pos += 1;
- Variable e = eval(&fs, out, tokens, pos, true);
+ Variable *out_type = vect_get(&f->outputs, 0);
+ Variable e = eval(&fs, out, tokens, pos, true, out_type);
var_end(&e);
} else {
t = vect_get(tokens, *pos);
@@ -4337,7 +4449,7 @@ void p2_compile_function(Module *root, CompData *out, Vector *tokens, size_t *po
} else {
// TODO: figure out eval parameter needs (maybe needs start and end size_t?)
// and how eval will play into top level defs (if at all)
- Variable e = eval(&fs, out, tokens, pos, false);
+ Variable e = eval(&fs, out, tokens, pos, false, NULL);
var_end(&e);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 23:37:24 +0000