static LLVMValueRef assign_rvalue(compile_t* c, ast_t* left, ast_t* r_type,
LLVMValueRef r_value)
{
switch(ast_id(left))
{
case TK_VAR:
case TK_LET:
{
// Generate the locals.
if(gen_localdecl(c, left) == NULL)
return NULL;
return assign_rvalue(c, ast_child(left), r_type, r_value);
}
case TK_FVARREF:
case TK_FLETREF:
{
// The result is the previous value of the field.
LLVMValueRef l_value = gen_fieldptr(c, left);
return assign_one(c, l_value, r_value, r_type);
}
case TK_VARREF:
{
// The result is the previous value of the local.
LLVMValueRef l_value = gen_localptr(c, left);
return assign_one(c, l_value, r_value, r_type);
}
case TK_TUPLE:
{
// If the l_value is a tuple, assemble it as the result.
LLVMValueRef result = gen_expr(c, left);
if(result == NULL)
return NULL;
if(!assign_tuple(c, left, r_type, r_value))
return NULL;
// Return the original tuple.
return result;
}
case TK_ID:
{
// We may have recursed here from a VAR or LET or arrived directly.
const char* name = ast_name(left);
LLVMValueRef l_value = codegen_getlocal(c, name);
return assign_one(c, l_value, r_value, r_type);
}
default: {}
}
assert(0);
return NULL;
}
static LLVMValueRef assign_rvalue(compile_t* c, ast_t* left, ast_t* r_type,
LLVMValueRef r_value)
{
switch(ast_id(left))
{
case TK_SEQ:
// The actual expression is inside a sequence node.
while(ast_id(left) == TK_SEQ)
{
assert(ast_childcount(left) == 1);
left = ast_child(left);
}
return assign_rvalue(c, left, r_type, r_value);
case TK_VAR:
case TK_LET:
{
// Generate the locals.
if(gen_localdecl(c, left) == NULL)
return NULL;
return assign_rvalue(c, ast_child(left), r_type, r_value);
}
case TK_FVARREF:
case TK_FLETREF:
{
// The result is the previous value of the field.
LLVMValueRef l_value = gen_fieldptr(c, left);
return assign_one(c, l_value, r_value, r_type);
}
case TK_EMBEDREF:
{
// Do nothing. The embed field was already passed as the receiver.
return GEN_NOVALUE;
}
case TK_VARREF:
{
// The result is the previous value of the local.
LLVMValueRef l_value = gen_localptr(c, left);
return assign_one(c, l_value, r_value, r_type);
}
case TK_TUPLE:
{
// If the l_value is a tuple, assemble it as the result.
LLVMValueRef result = gen_expr(c, left);
if(result == NULL)
return NULL;
if(!assign_tuple(c, left, r_type, r_value))
return NULL;
// Return the original tuple.
return result;
}
case TK_ID:
{
// We may have recursed here from a VAR or LET or arrived directly.
const char* name = ast_name(left);
LLVMValueRef l_value = codegen_getlocal(c, name);
return assign_one(c, l_value, r_value, r_type);
}
default: {}
}
assert(0);
return NULL;
}