return rshift_node;
}
-/**
- * returns true if it is assured, that the upper bits of a node are "clean"
- * which means for a 16 or 8 bit value, that the upper bits in the register
- * are 0 for unsigned and a copy of the last significant bit for signed
- * numbers.
- */
-static bool upper_bits_clean(ir_node *node, ir_mode *mode)
-{
- switch ((ir_opcode)get_irn_opcode(node)) {
- case iro_And:
- if (!mode_is_signed(mode)) {
- return upper_bits_clean(get_And_left(node), mode)
- || upper_bits_clean(get_And_right(node), mode);
- }
- /* FALLTHROUGH */
- case iro_Or:
- case iro_Eor:
- return upper_bits_clean(get_binop_left(node), mode)
- && upper_bits_clean(get_binop_right(node), mode);
-
- case iro_Shr:
- if (mode_is_signed(mode)) {
- return false; /* TODO */
- } else {
- ir_node *right = get_Shr_right(node);
- if (is_Const(right)) {
- ir_tarval *tv = get_Const_tarval(right);
- long val = get_tarval_long(tv);
- if (val >= 32 - (long)get_mode_size_bits(mode))
- return true;
- }
- return upper_bits_clean(get_Shr_left(node), mode);
- }
-
- case iro_Shrs:
- return upper_bits_clean(get_Shrs_left(node), mode);
-
- case iro_Const: {
- ir_tarval *tv = get_Const_tarval(node);
- long val = get_tarval_long(tv);
- if (mode_is_signed(mode)) {
- long shifted = val >> (get_mode_size_bits(mode)-1);
- return shifted == 0 || shifted == -1;
- } else {
- unsigned long shifted = (unsigned long)val;
- shifted >>= get_mode_size_bits(mode)-1;
- shifted >>= 1;
- return shifted == 0;
- }
- }
-
- case iro_Conv: {
- ir_mode *dest_mode = get_irn_mode(node);
- ir_node *op = get_Conv_op(node);
- ir_mode *src_mode = get_irn_mode(op);
- unsigned src_bits = get_mode_size_bits(src_mode);
- unsigned dest_bits = get_mode_size_bits(dest_mode);
- /* downconvs are a nop */
- if (src_bits <= dest_bits)
- return upper_bits_clean(op, mode);
- if (dest_bits <= get_mode_size_bits(mode)
- && mode_is_signed(dest_mode) == mode_is_signed(mode))
- return true;
- return false;
- }
-
- case iro_Proj: {
- ir_node *pred = get_Proj_pred(node);
- switch (get_irn_opcode(pred)) {
- case iro_Load: {
- ir_mode *load_mode = get_Load_mode(pred);
- unsigned load_bits = get_mode_size_bits(load_mode);
- unsigned bits = get_mode_size_bits(mode);
- if (load_bits > bits)
- return false;
- if (mode_is_signed(mode) != mode_is_signed(load_mode))
- return false;
- return true;
- }
- default:
- break;
- }
- }
- default:
- break;
- }
- return false;
-}
-
/**
* Extend a value to 32 bit signed/unsigned depending on its mode.
*
static bool needs_extension(ir_node *op)
{
ir_mode *mode = get_irn_mode(op);
- if (get_mode_size_bits(mode) >= get_mode_size_bits(mode_gp))
+ unsigned gp_bits = get_mode_size_bits(mode_gp);
+ if (get_mode_size_bits(mode) >= gp_bits)
return false;
- return !upper_bits_clean(op, mode);
+ return !be_upper_bits_clean(op, mode);
}
/**
return create_itof(dbgi, block, new_op, dst_mode);
}
} else { /* complete in gp registers */
- int min_bits;
- ir_mode *min_mode;
-
- if (src_bits == dst_bits || dst_mode == mode_b) {
+ if (src_bits >= dst_bits || dst_mode == mode_b) {
/* kill unnecessary conv */
return be_transform_node(op);
}
- if (src_bits < dst_bits) {
- min_bits = src_bits;
- min_mode = src_mode;
- } else {
- min_bits = dst_bits;
- min_mode = dst_mode;
- }
-
- if (upper_bits_clean(op, min_mode)) {
+ if (be_upper_bits_clean(op, src_mode)) {
return be_transform_node(op);
}
new_op = be_transform_node(op);
- if (mode_is_signed(min_mode)) {
- return gen_sign_extension(dbgi, block, new_op, min_bits);
+ if (mode_is_signed(src_mode)) {
+ return gen_sign_extension(dbgi, block, new_op, src_bits);
} else {
- return gen_zero_extension(dbgi, block, new_op, min_bits);
+ return gen_zero_extension(dbgi, block, new_op, src_bits);
}
}
}
size_t i;
/* start building list of start constraints */
- assert(obstack_object_size(obst) == 0);
/* calculate number of outputs */
n_outs = 4; /* memory, g0, g7, sp */
}
assert(result_info->req1 == NULL);
}
+ const unsigned *allocatable_regs = be_birg_from_irg(irg)->allocatable_regs;
for (i = 0; i < N_SPARC_REGISTERS; ++i) {
const arch_register_t *reg;
if (!rbitset_is_set(cconv->caller_saves, i))
continue;
reg = &sparc_registers[i];
- arch_set_irn_register_req_out(res, o++, reg->single_req);
+ arch_set_irn_register_req_out(res, o, reg->single_req);
+ if (!rbitset_is_set(allocatable_regs, reg->global_index))
+ arch_set_irn_register_out(res, o, reg);
+ ++o;
}
assert(o == out_arity);
}
}
-/**
- * Transform some Phi nodes
- */
static ir_node *gen_Phi(ir_node *node)
{
+ ir_mode *mode = get_irn_mode(node);
const arch_register_req_t *req;
- ir_node *block = be_transform_node(get_nodes_block(node));
- ir_graph *irg = current_ir_graph;
- dbg_info *dbgi = get_irn_dbg_info(node);
- ir_mode *mode = get_irn_mode(node);
- ir_node *phi;
-
if (mode_needs_gp_reg(mode)) {
/* we shouldn't have any 64bit stuff around anymore */
assert(get_mode_size_bits(mode) <= 32);
req = arch_no_register_req;
}
- /* phi nodes allow loops, so we use the old arguments for now
- * and fix this later */
- phi = new_ir_node(dbgi, irg, block, op_Phi, mode, get_irn_arity(node), get_irn_in(node) + 1);
- copy_node_attr(irg, node, phi);
- be_duplicate_deps(node, phi);
- arch_set_irn_register_req_out(phi, 0, req);
- be_enqueue_preds(node);
- return phi;
+ return be_transform_phi(node, req);
}
/**
panic("Unsupported Proj from Store");
}
-/**
- * Transform the Projs from a Cmp.
- */
-static ir_node *gen_Proj_Cmp(ir_node *node)
-{
- (void) node;
- panic("not implemented");
-}
-
/**
* transform Projs from a Div
*/
return gen_Proj_Load(node);
case iro_Call:
return gen_Proj_Call(node);
- case iro_Cmp:
- return gen_Proj_Cmp(node);
case iro_Switch:
case iro_Cond:
return be_duplicate_node(node);
projects / libfirm / blobdiff