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ir_reader: Read function calls.

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This commit is contained in:
Kenneth Graunke 2010-04-28 12:54:21 -07:00 • committed by Ian Romanick
parent b142aeeb20
commit b51557fbe2
1 changed files with 46 additions and 1 deletions
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47
ir_reader.cpp
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@ -50,6 +50,7 @@ static ir_return *read_return(_mesa_glsl_parse_state *, s_list *);
static ir_rvalue *read_rvalue(_mesa_glsl_parse_state *, s_expression *);
static ir_assignment *read_assignment(_mesa_glsl_parse_state *, s_list *);
static ir_expression *read_expression(_mesa_glsl_parse_state *, s_list *);
static ir_call *read_call(_mesa_glsl_parse_state *, s_list *);
static ir_swizzle *read_swizzle(_mesa_glsl_parse_state *, s_list *);
static ir_constant *read_constant(_mesa_glsl_parse_state *, s_list *);
static ir_dereference *read_var_ref(_mesa_glsl_parse_state *, s_list *);
@ -536,7 +537,8 @@ read_rvalue(_mesa_glsl_parse_state *st, s_expression *expr)
rvalue = read_assignment(st, list);
} else if (strcmp(tag->value(), "expression") == 0) {
rvalue = read_expression(st, list);
// FINISHME: ir_call
} else if (strcmp(tag->value(), "call") == 0) {
rvalue = read_call(st, list);
} else if (strcmp(tag->value(), "constant") == 0) {
rvalue = read_constant(st, list);
} else if (strcmp(tag->value(), "var_ref") == 0) {
@ -586,6 +588,49 @@ read_assignment(_mesa_glsl_parse_state *st, s_list *list)
return new ir_assignment(lhs, rhs, condition);
}
static ir_call *
read_call(_mesa_glsl_parse_state *st, s_list *list)
{
if (list->length() != 3) {
ir_read_error(st, list, "expected (call <name> (<param> ...))");
return NULL;
}
s_symbol *name = SX_AS_SYMBOL(list->subexpressions.head->next);
s_list *params = SX_AS_LIST(name->next);
if (name == NULL || params == NULL) {
ir_read_error(st, list, "expected (call <name> (<param> ...))");
return NULL;
}
exec_list parameters;
foreach_iter(exec_list_iterator, it, params->subexpressions) {
s_expression *expr = (s_expression*) it.get();
ir_rvalue *param = read_rvalue(st, expr);
if (param == NULL) {
ir_read_error(st, list, "when reading parameter to function call");
return NULL;
}
parameters.push_tail(param);
}
ir_function *f = st->symbols->get_function(name->value());
if (f == NULL) {
ir_read_error(st, list, "found call to undefined function %s",
name->value());
return NULL;
}
const ir_function_signature *callee = f->matching_signature(&parameters);
if (callee == NULL) {
ir_read_error(st, list, "couldn't find matching signature for function "
"%s", name->value());
return NULL;
}
return new ir_call(callee, &parameters);
}
static ir_expression *
read_expression(_mesa_glsl_parse_state *st, s_list *list)