* @file
* @brief code selection (transform FIRM into SPARC FIRM)
* @author Hannes Rapp, Matthias Braun
- * @version $Id$
*/
#include "config.h"
#include "error.h"
#include "util.h"
-#include "../benode.h"
-#include "../beirg.h"
-#include "../beutil.h"
-#include "../betranshlp.h"
-#include "../beabihelper.h"
+#include "benode.h"
+#include "beirg.h"
+#include "beutil.h"
+#include "betranshlp.h"
+#include "beabihelper.h"
#include "bearch_sparc_t.h"
#include "sparc_nodes_attr.h"
* are 0 for unsigned and a copy of the last significant bit for signed
* numbers.
*/
-static bool upper_bits_clean(ir_node *transformed_node, ir_mode *mode)
+static bool upper_bits_clean(ir_node *node, ir_mode *mode)
{
- (void) transformed_node;
- (void) mode;
- /* TODO */
+ 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;
}
ir_mode *orig_mode)
{
int bits = get_mode_size_bits(orig_mode);
- if (bits == 32)
- return op;
+ assert(bits < 32);
if (mode_is_signed(orig_mode)) {
return gen_sign_extension(dbgi, block, op, bits);
return sparc_is_value_imm_encodeable(value);
}
-static bool needs_extension(ir_mode *mode)
+static bool needs_extension(ir_node *op)
{
- return get_mode_size_bits(mode) < get_mode_size_bits(mode_gp);
+ ir_mode *mode = get_irn_mode(op);
+ if (get_mode_size_bits(mode) >= get_mode_size_bits(mode_gp))
+ return false;
+ return !upper_bits_clean(op, mode);
}
/**
if (is_imm_encodeable(op2)) {
int32_t immediate = get_tarval_long(get_Const_tarval(op2));
new_op1 = be_transform_node(op1);
- if (! (flags & MATCH_MODE_NEUTRAL) && needs_extension(mode1)) {
+ if (! (flags & MATCH_MODE_NEUTRAL) && needs_extension(op1)) {
new_op1 = gen_extension(dbgi, block, new_op1, mode1);
}
return new_imm(dbgi, block, new_op1, NULL, immediate);
}
new_op2 = be_transform_node(op2);
- if (! (flags & MATCH_MODE_NEUTRAL) && needs_extension(mode2)) {
+ if (! (flags & MATCH_MODE_NEUTRAL) && needs_extension(op2)) {
new_op2 = gen_extension(dbgi, block, new_op2, mode2);
}
}
new_op1 = be_transform_node(op1);
- if (! (flags & MATCH_MODE_NEUTRAL) && needs_extension(mode1)) {
+ if (! (flags & MATCH_MODE_NEUTRAL) && needs_extension(op1)) {
new_op1 = gen_extension(dbgi, block, new_op1, mode1);
}
return new_reg(dbgi, block, new_op1, new_op2);
flags,
new_not_reg, new_not_imm);
}
+ if (is_Const(op2) && get_irn_n_edges(op2) == 1) {
+ ir_tarval *tv = get_Const_tarval(op2);
+ long value = get_tarval_long(tv);
+ if (!sparc_is_value_imm_encodeable(value)) {
+ long notvalue = ~value;
+ if ((notvalue & 0x3ff) == 0) {
+ ir_node *block = get_nodes_block(node);
+ ir_node *new_block = be_transform_node(block);
+ dbg_info *dbgi = get_irn_dbg_info(node);
+ ir_node *new_op2
+ = new_bd_sparc_SetHi(NULL, new_block, NULL, notvalue);
+ ir_node *new_op1 = be_transform_node(op1);
+ ir_node *result
+ = new_not_reg(dbgi, new_block, new_op1, new_op2);
+ return result;
+ }
+ }
+ }
return gen_helper_binop_args(node, op1, op2,
flags | MATCH_COMMUTATIVE,
new_reg, new_imm);
}
}
-static ir_mode *get_cmp_mode(ir_node *b_value)
+static ir_node *gen_Switch(ir_node *node)
{
- ir_node *op;
-
- if (!is_Cmp(b_value))
- panic("can't determine cond signednes (no cmp)");
- op = get_Cmp_left(b_value);
- return get_irn_mode(op);
-}
+ dbg_info *dbgi = get_irn_dbg_info(node);
+ ir_node *block = get_nodes_block(node);
+ ir_node *new_block = be_transform_node(block);
+ ir_graph *irg = get_irn_irg(block);
+ ir_node *selector = get_Switch_selector(node);
+ ir_node *new_selector = be_transform_node(selector);
+ const ir_switch_table *table = get_Switch_table(node);
+ unsigned n_outs = get_Switch_n_outs(node);
+ ir_entity *entity;
+ ir_node *table_address;
+ ir_node *idx;
+ ir_node *load;
+ ir_node *address;
-static ir_node *gen_SwitchJmp(ir_node *node)
-{
- dbg_info *dbgi = get_irn_dbg_info(node);
- ir_node *block = be_transform_node(get_nodes_block(node));
- ir_node *selector = get_Cond_selector(node);
- ir_node *new_selector = be_transform_node(selector);
- long default_pn = get_Cond_default_proj(node);
- ir_entity *entity;
- ir_node *table_address;
- ir_node *idx;
- ir_node *load;
- ir_node *address;
+ table = ir_switch_table_duplicate(irg, table);
/* switch with smaller mode not implemented yet */
assert(get_mode_size_bits(get_irn_mode(selector)) == 32);
add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
/* construct base address */
- table_address = make_address(dbgi, block, entity, 0);
+ table_address = make_address(dbgi, new_block, entity, 0);
/* scale index */
- idx = new_bd_sparc_Sll_imm(dbgi, block, new_selector, NULL, 2);
+ idx = new_bd_sparc_Sll_imm(dbgi, new_block, new_selector, NULL, 2);
/* load from jumptable */
- load = new_bd_sparc_Ld_reg(dbgi, block, table_address, idx,
+ load = new_bd_sparc_Ld_reg(dbgi, new_block, table_address, idx,
get_irg_no_mem(current_ir_graph),
mode_gp);
address = new_r_Proj(load, mode_gp, pn_sparc_Ld_res);
- return new_bd_sparc_SwitchJmp(dbgi, block, address, default_pn, entity);
+ return new_bd_sparc_SwitchJmp(dbgi, new_block, address, n_outs, table, entity);
}
static ir_node *gen_Cond(ir_node *node)
{
ir_node *selector = get_Cond_selector(node);
- ir_mode *mode = get_irn_mode(selector);
+ ir_node *cmp_left;
+ ir_mode *cmp_mode;
ir_node *block;
ir_node *flag_node;
- bool is_unsigned;
ir_relation relation;
dbg_info *dbgi;
- /* switch/case jumps */
- if (mode != mode_b) {
- return gen_SwitchJmp(node);
- }
-
- block = be_transform_node(get_nodes_block(node));
- dbgi = get_irn_dbg_info(node);
-
- /* regular if/else jumps */
- if (is_Cmp(selector)) {
- ir_mode *cmp_mode;
-
- cmp_mode = get_cmp_mode(selector);
- flag_node = be_transform_node(selector);
- relation = get_Cmp_relation(selector);
- is_unsigned = !mode_is_signed(cmp_mode);
- if (mode_is_float(cmp_mode)) {
- assert(!is_unsigned);
- return new_bd_sparc_fbfcc(dbgi, block, flag_node, relation);
- } else {
- return new_bd_sparc_Bicc(dbgi, block, flag_node, relation, is_unsigned);
- }
+ /* note: after lower_mode_b we are guaranteed to have a Cmp input */
+ block = be_transform_node(get_nodes_block(node));
+ dbgi = get_irn_dbg_info(node);
+ cmp_left = get_Cmp_left(selector);
+ cmp_mode = get_irn_mode(cmp_left);
+ flag_node = be_transform_node(selector);
+ relation = get_Cmp_relation(selector);
+ if (mode_is_float(cmp_mode)) {
+ return new_bd_sparc_fbfcc(dbgi, block, flag_node, relation);
} else {
- /* in this case, the selector must already deliver a mode_b value.
- * this happens, for example, when the Cond is connected to a Conv
- * which converts its argument to mode_b. */
- ir_node *new_op;
- ir_graph *irg;
- assert(mode == mode_b);
-
- block = be_transform_node(get_nodes_block(node));
- irg = get_irn_irg(block);
- dbgi = get_irn_dbg_info(node);
- new_op = be_transform_node(selector);
- /* follow the SPARC architecture manual and use orcc for tst */
- flag_node = new_bd_sparc_OrCCZero_reg(dbgi, block, new_op, get_g0(irg));
- return new_bd_sparc_Bicc(dbgi, block, flag_node, ir_relation_less_greater, true);
+ bool is_unsigned = !mode_is_signed(cmp_mode);
+ return new_bd_sparc_Bicc(dbgi, block, flag_node, relation, is_unsigned);
}
}
new_bd_sparc_XNorCCZero_reg,
new_bd_sparc_XNorCCZero_imm,
MATCH_NONE);
+ } else if (is_Add(op1)) {
+ return gen_helper_binop(op1, MATCH_COMMUTATIVE,
+ new_bd_sparc_AddCCZero_reg,
+ new_bd_sparc_AddCCZero_imm);
+ } else if (is_Sub(op1)) {
+ return gen_helper_binop(op1, MATCH_NONE,
+ new_bd_sparc_SubCCZero_reg,
+ new_bd_sparc_SubCCZero_imm);
+ } else if (is_Mul(op1)) {
+ return gen_helper_binop(op1, MATCH_COMMUTATIVE,
+ new_bd_sparc_MulCCZero_reg,
+ new_bd_sparc_MulCCZero_imm);
}
}
if (src_mode == mode_b)
panic("ConvB not lowered %+F", node);
- new_op = be_transform_node(op);
if (src_mode == dst_mode)
- return new_op;
+ return be_transform_node(op);
if (mode_is_float(src_mode) || mode_is_float(dst_mode)) {
assert((src_bits <= 64 && dst_bits <= 64) && "quad FP not implemented");
+ new_op = be_transform_node(op);
if (mode_is_float(src_mode)) {
if (mode_is_float(dst_mode)) {
/* float -> float conv */
}
return create_itof(dbgi, block, new_op, dst_mode);
}
- } else if (src_mode == mode_b) {
- panic("ConvB not lowered %+F", node);
} else { /* complete in gp registers */
int min_bits;
ir_mode *min_mode;
- if (src_bits == dst_bits) {
+ if (src_bits == dst_bits || dst_mode == mode_b) {
/* kill unnecessary conv */
- return new_op;
- }
-
- if (dst_mode == mode_b) {
- /* mode_b lowering already took care that we only have 0/1 values */
- return new_op;
+ return be_transform_node(op);
}
if (src_bits < dst_bits) {
min_mode = dst_mode;
}
- if (upper_bits_clean(new_op, min_mode)) {
- return new_op;
+ if (upper_bits_clean(op, min_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);
return gen_Proj_Call(node);
case iro_Cmp:
return gen_Proj_Cmp(node);
+ case iro_Switch:
case iro_Cond:
return be_duplicate_node(node);
case iro_Div:
be_set_transform_function(op_Start, gen_Start);
be_set_transform_function(op_Store, gen_Store);
be_set_transform_function(op_Sub, gen_Sub);
+ be_set_transform_function(op_Switch, gen_Switch);
be_set_transform_function(op_SymConst, gen_SymConst);
be_set_transform_function(op_Unknown, gen_Unknown);
node_to_stack = pmap_create();
- mode_gp = mode_Iu;
- mode_fp = mode_F;
+ mode_gp = sparc_reg_classes[CLASS_sparc_gp].mode;
+ mode_fp = sparc_reg_classes[CLASS_sparc_fp].mode;
mode_fp2 = mode_D;
- mode_flags = mode_Bu;
//mode_fp4 = ?
+ mode_flags = sparc_reg_classes[CLASS_sparc_flags_class].mode;
+ assert(sparc_reg_classes[CLASS_sparc_fpflags_class].mode == mode_flags);
start_mem = NULL;
start_g0 = NULL;
/* do code placement, to optimize the position of constants */
place_code(irg);
+ /* backend expects outedges to be always on */
+ edges_assure(irg);
}
void sparc_init_transform(void)
projects / libfirm / blobdiff