*/
#include "brw_fs.h"
+#include "util/bitset.h"
+
+struct cfg_t;
namespace brw {
* Note that for our purposes, "defined" means unconditionally, completely
* defined.
*/
- bool *def;
+ BITSET_WORD *def;
/**
* Which variables are used before being defined in the block.
*/
- bool *use;
+ BITSET_WORD *use;
/** Which defs reach the entry point of the block. */
- bool *livein;
+ BITSET_WORD *livein;
/** Which defs reach the exit point of the block. */
- bool *liveout;
+ BITSET_WORD *liveout;
+
+ BITSET_WORD flag_def[1];
+ BITSET_WORD flag_use[1];
+ BITSET_WORD flag_livein[1];
+ BITSET_WORD flag_liveout[1];
};
class fs_live_variables {
public:
- static void* operator new(size_t size, void *ctx)
- {
- void *node;
+ DECLARE_RALLOC_CXX_OPERATORS(fs_live_variables)
- node = rzalloc_size(ctx, size);
- assert(node != NULL);
+ fs_live_variables(fs_visitor *v, const cfg_t *cfg);
+ ~fs_live_variables();
- return node;
+ bool vars_interfere(int a, int b);
+ int var_from_reg(const fs_reg ®) const
+ {
+ return var_from_vgrf[reg.nr] + reg.reg_offset;
}
- fs_live_variables(fs_visitor *v, fs_cfg *cfg);
- ~fs_live_variables();
+ /** Map from virtual GRF number to index in block_data arrays. */
+ int *var_from_vgrf;
+
+ /**
+ * Map from any index in block_data to the virtual GRF containing it.
+ *
+ * For alloc.sizes of [1, 2, 3], vgrf_from_var would contain
+ * [0, 1, 1, 2, 2, 2].
+ */
+ int *vgrf_from_var;
+ int num_vars;
+ int num_vgrfs;
+ int bitset_words;
+
+ /** @{
+ * Final computed live ranges for each var (each component of each virtual
+ * GRF).
+ */
+ int *start;
+ int *end;
+ /** @} */
+
+ /** Per-basic-block information on live variables */
+ struct block_data *block_data;
+
+protected:
void setup_def_use();
+ void setup_one_read(struct block_data *bd, fs_inst *inst, int ip,
+ const fs_reg ®);
+ void setup_one_write(struct block_data *bd, fs_inst *inst, int ip,
+ const fs_reg ®);
void compute_live_variables();
+ void compute_start_end();
fs_visitor *v;
- fs_cfg *cfg;
+ const cfg_t *cfg;
void *mem_ctx;
- int num_vars;
-
- /** Per-basic-block information on live variables */
- struct block_data *bd;
};
} /* namespace brw */