mesa/src/gallium/drivers/r600/sb/sb_pass.h

736 lines
17 KiB
C++

/*
* Copyright 2013 Vadim Girlin <vadimgirlin@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Vadim Girlin
*/
#ifndef SB_PASS_H_
#define SB_PASS_H_
#include <stack>
namespace r600_sb {
class pass {
protected:
sb_context &ctx;
shader &sh;
public:
pass(shader &s);
virtual int run();
virtual ~pass() {}
};
class vpass : public pass {
public:
vpass(shader &s) : pass(s) {}
virtual int init();
virtual int done();
virtual int run();
virtual void run_on(container_node &n);
virtual bool visit(node &n, bool enter);
virtual bool visit(container_node &n, bool enter);
virtual bool visit(alu_group_node &n, bool enter);
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(alu_packed_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
virtual bool visit(repeat_node &n, bool enter);
virtual bool visit(depart_node &n, bool enter);
virtual bool visit(if_node &n, bool enter);
virtual bool visit(bb_node &n, bool enter);
};
class rev_vpass : public vpass {
public:
rev_vpass(shader &s) : vpass(s) {}
virtual void run_on(container_node &n);
};
// =================== PASSES
class bytecode;
class bc_dump : public vpass {
using vpass::visit;
uint32_t *bc_data;
unsigned ndw;
unsigned id;
unsigned new_group, group_index;
public:
bc_dump(shader &s, bytecode *bc = NULL);
bc_dump(shader &s, uint32_t *bc_ptr, unsigned ndw) :
vpass(s), bc_data(bc_ptr), ndw(ndw), id(), new_group(), group_index() {}
virtual int init();
virtual int done();
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
void dump_dw(unsigned dw_id, unsigned count = 2);
void dump(cf_node& n);
void dump(alu_node& n);
void dump(fetch_node& n);
};
class dce_cleanup : public vpass {
using vpass::visit;
bool remove_unused;
public:
dce_cleanup(shader &s) : vpass(s),
remove_unused(s.dce_flags & DF_REMOVE_UNUSED), nodes_changed(false) {}
virtual int run();
virtual bool visit(node &n, bool enter);
virtual bool visit(alu_group_node &n, bool enter);
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(alu_packed_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
virtual bool visit(container_node &n, bool enter);
private:
void cleanup_dst(node &n);
bool cleanup_dst_vec(vvec &vv);
// Did we alter/remove nodes during a single pass?
bool nodes_changed;
};
class def_use : public pass {
public:
def_use(shader &sh) : pass(sh) {}
virtual int run();
void run_on(node *n, bool defs);
private:
void process_uses(node *n);
void process_defs(node *n, vvec &vv, bool arr_def);
void process_phi(container_node *c, bool defs, bool uses);
};
class dump : public vpass {
using vpass::visit;
int level;
public:
dump(shader &s) : vpass(s), level(0) {}
virtual bool visit(node &n, bool enter);
virtual bool visit(container_node &n, bool enter);
virtual bool visit(alu_group_node &n, bool enter);
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(alu_packed_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
virtual bool visit(repeat_node &n, bool enter);
virtual bool visit(depart_node &n, bool enter);
virtual bool visit(if_node &n, bool enter);
virtual bool visit(bb_node &n, bool enter);
static void dump_op(node &n, const char *name);
static void dump_vec(const vvec & vv);
static void dump_set(shader &sh, val_set & v);
static void dump_rels(vvec & vv);
static void dump_val(value *v);
static void dump_op(node *n);
static void dump_op_list(container_node *c);
static void dump_queue(sched_queue &q);
static void dump_alu(alu_node *n);
private:
void indent();
void dump_common(node &n);
void dump_flags(node &n);
void dump_live_values(container_node &n, bool before);
};
// Global Code Motion
class gcm : public pass {
sched_queue bu_ready[SQ_NUM];
sched_queue bu_ready_next[SQ_NUM];
sched_queue bu_ready_early[SQ_NUM];
sched_queue ready;
sched_queue ready_above;
unsigned outstanding_lds_oq;
container_node pending;
struct op_info {
bb_node* top_bb;
bb_node* bottom_bb;
op_info() : top_bb(), bottom_bb() {}
};
typedef std::map<node*, op_info> op_info_map;
typedef std::map<node*, unsigned> nuc_map;
op_info_map op_map;
nuc_map uses;
typedef std::vector<nuc_map> nuc_stack;
nuc_stack nuc_stk;
unsigned ucs_level;
bb_node * bu_bb;
vvec pending_defs;
node_list pending_nodes;
unsigned cur_sq;
// for register pressure tracking in bottom-up pass
val_set live;
int live_count;
static const int rp_threshold = 100;
bool pending_exec_mask_update;
public:
gcm(shader &sh) : pass(sh),
bu_ready(), bu_ready_next(), bu_ready_early(),
ready(), outstanding_lds_oq(),
op_map(), uses(), nuc_stk(1), ucs_level(),
bu_bb(), pending_defs(), pending_nodes(), cur_sq(),
live(), live_count(), pending_exec_mask_update() {}
virtual int run();
private:
void collect_instructions(container_node *c, bool early_pass);
void sched_early(container_node *n);
void td_sched_bb(bb_node *bb);
bool td_is_ready(node *n);
void td_release_uses(vvec &v);
void td_release_val(value *v);
void td_schedule(bb_node *bb, node *n);
void sched_late(container_node *n);
void bu_sched_bb(bb_node *bb);
void bu_release_defs(vvec &v, bool src);
void bu_release_phi_defs(container_node *p, unsigned op);
bool bu_is_ready(node *n);
void bu_release_val(value *v);
void bu_release_op(node * n);
void bu_find_best_bb(node *n, op_info &oi);
void bu_schedule(container_node *bb, node *n);
void push_uc_stack();
void pop_uc_stack();
void init_def_count(nuc_map &m, container_node &s);
void init_use_count(nuc_map &m, container_node &s);
unsigned get_uc_vec(vvec &vv);
unsigned get_dc_vec(vvec &vv, bool src);
void add_ready(node *n);
void dump_uc_stack();
unsigned real_alu_count(sched_queue &q, unsigned max);
// check if we have not less than threshold ready alu instructions
bool check_alu_ready_count(unsigned threshold);
};
class gvn : public vpass {
using vpass::visit;
public:
gvn(shader &sh) : vpass(sh) {}
virtual bool visit(node &n, bool enter);
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(alu_packed_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
private:
void process_op(node &n, bool rewrite = true);
// returns true if the value was rewritten
bool process_src(value* &v, bool rewrite);
void process_alu_src_constants(node &n, value* &v);
};
class if_conversion : public pass {
public:
if_conversion(shader &sh) : pass(sh) {}
virtual int run();
bool run_on(region_node *r);
void convert_kill_instructions(region_node *r, value *em, bool branch,
container_node *c);
bool check_and_convert(region_node *r);
alu_node* convert_phi(value *select, node *phi);
};
class liveness : public rev_vpass {
using vpass::visit;
val_set live;
bool live_changed;
public:
liveness(shader &s) : rev_vpass(s), live_changed(false) {}
virtual int init();
virtual bool visit(node &n, bool enter);
virtual bool visit(bb_node &n, bool enter);
virtual bool visit(container_node &n, bool enter);
virtual bool visit(alu_group_node &n, bool enter);
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(alu_packed_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
virtual bool visit(repeat_node &n, bool enter);
virtual bool visit(depart_node &n, bool enter);
virtual bool visit(if_node &n, bool enter);
private:
void update_interferences();
void process_op(node &n);
bool remove_val(value *v);
bool remove_vec(vvec &v);
bool process_outs(node& n);
void process_ins(node& n);
void process_phi_outs(container_node *phi);
void process_phi_branch(container_node *phi, unsigned id);
bool process_maydef(value *v);
bool add_vec(vvec &vv, bool src);
void update_src_vec(vvec &vv, bool src);
};
struct bool_op_info {
bool invert;
unsigned int_cvt;
alu_node *n;
};
class peephole : public pass {
public:
peephole(shader &sh) : pass(sh) {}
virtual int run();
void run_on(container_node *c);
void optimize_cc_op(alu_node *a);
void optimize_cc_op2(alu_node *a);
void optimize_CNDcc_op(alu_node *a);
bool get_bool_op_info(value *b, bool_op_info& bop);
bool get_bool_flt_to_int_source(alu_node* &a);
void convert_float_setcc(alu_node *f2i, alu_node *s);
};
class psi_ops : public rev_vpass {
using rev_vpass::visit;
public:
psi_ops(shader &s) : rev_vpass(s) {}
virtual bool visit(node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
bool try_inline(node &n);
bool try_reduce(node &n);
bool eliminate(node &n);
void unpredicate(node *n);
};
// check correctness of the generated code, e.g.:
// - expected source operand value is the last value written to its gpr,
// - all arguments of phi node should be allocated to the same gpr,
// TODO other tests
class ra_checker : public pass {
typedef std::map<sel_chan, value *> reg_value_map;
typedef std::vector<reg_value_map> regmap_stack;
regmap_stack rm_stack;
unsigned rm_stk_level;
value* prev_dst[5];
public:
ra_checker(shader &sh) : pass(sh), rm_stk_level(0), prev_dst() {}
virtual int run();
void run_on(container_node *c);
void dump_error(const error_info &e);
void dump_all_errors();
private:
reg_value_map& rmap() { return rm_stack[rm_stk_level]; }
void push_stack();
void pop_stack();
// when going out of the alu clause, values in the clause temporary gprs,
// AR, predicate values, PS/PV are destroyed
void kill_alu_only_regs();
void error(node *n, unsigned id, std::string msg);
void check_phi_src(container_node *p, unsigned id);
void process_phi_dst(container_node *p);
void check_alu_group(alu_group_node *g);
void process_op_dst(node *n);
void check_op_src(node *n);
void check_src_vec(node *n, unsigned id, vvec &vv, bool src);
void check_value_gpr(node *n, unsigned id, value *v);
};
// =======================================
class ra_coalesce : public pass {
public:
ra_coalesce(shader &sh) : pass(sh) {}
virtual int run();
};
// =======================================
class ra_init : public pass {
public:
ra_init(shader &sh) : pass(sh), prev_chans() {
// The parameter below affects register channels distribution.
// For cayman (VLIW-4) we're trying to distribute the channels
// uniformly, this means significantly better alu slots utilization
// at the expense of higher gpr usage. Hopefully this will improve
// performance, though it has to be proven with real benchmarks yet.
// For VLIW-5 this method could also slightly improve slots
// utilization, but increased register pressure seems more significant
// and overall performance effect is negative according to some
// benchmarks, so it's not used currently. Basically, VLIW-5 doesn't
// really need it because trans slot (unrestricted by register write
// channel) allows to consume most deviations from uniform channel
// distribution.
// Value 3 means that for new allocation we'll use channel that differs
// from 3 last used channels. 0 for VLIW-5 effectively turns this off.
ra_tune = sh.get_ctx().is_cayman() ? 3 : 0;
}
virtual int run();
private:
unsigned prev_chans;
unsigned ra_tune;
void add_prev_chan(unsigned chan);
unsigned get_preferable_chan_mask();
bool ra_node(container_node *c);
bool process_op(node *n);
bool color(value *v);
void color_bs_constraint(ra_constraint *c);
void assign_color(value *v, sel_chan c);
void alloc_arrays();
};
// =======================================
class ra_split : public pass {
public:
ra_split(shader &sh) : pass(sh) {}
virtual int run();
void split(container_node *n);
void split_op(node *n);
void split_alu_packed(alu_packed_node *n);
void split_vector_inst(node *n);
void split_packed_ins(alu_packed_node *n);
#if 0
void split_pinned_outs(node *n);
#endif
void split_vec(vvec &vv, vvec &v1, vvec &v2, bool allow_swz);
void split_phi_src(container_node *loc, container_node *c, unsigned id,
bool loop);
void split_phi_dst(node *loc, container_node *c, bool loop);
void init_phi_constraints(container_node *c);
};
class ssa_prepare : public vpass {
using vpass::visit;
typedef std::vector<val_set> vd_stk;
vd_stk stk;
unsigned level;
public:
ssa_prepare(shader &s) : vpass(s), level(0) {}
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
virtual bool visit(repeat_node &n, bool enter);
virtual bool visit(depart_node &n, bool enter);
private:
void push_stk() {
++level;
if (level + 1 > stk.size())
stk.resize(level+1);
else
stk[level].clear();
}
void pop_stk() {
assert(level);
--level;
stk[level].add_set(stk[level + 1]);
}
void add_defs(node &n);
val_set & cur_set() { return stk[level]; }
container_node* create_phi_nodes(int count);
};
class ssa_rename : public vpass {
using vpass::visit;
typedef sb_map<value*, unsigned> def_map;
def_map def_count;
def_map lds_oq_count;
def_map lds_rw_count;
std::stack<def_map> rename_stack;
std::stack<def_map> rename_lds_oq_stack;
std::stack<def_map> rename_lds_rw_stack;
typedef std::map<uint32_t, value*> val_map;
val_map values;
public:
ssa_rename(shader &s) : vpass(s) {}
virtual int init();
virtual bool visit(container_node &n, bool enter);
virtual bool visit(node &n, bool enter);
virtual bool visit(alu_group_node &n, bool enter);
virtual bool visit(cf_node &n, bool enter);
virtual bool visit(alu_node &n, bool enter);
virtual bool visit(alu_packed_node &n, bool enter);
virtual bool visit(fetch_node &n, bool enter);
virtual bool visit(region_node &n, bool enter);
virtual bool visit(repeat_node &n, bool enter);
virtual bool visit(depart_node &n, bool enter);
virtual bool visit(if_node &n, bool enter);
private:
void push(node *phi);
void pop();
unsigned get_index(def_map& m, value* v);
void set_index(def_map& m, value* v, unsigned index);
unsigned new_index(def_map& m, value* v);
value* rename_use(node *n, value* v);
value* rename_def(node *def, value* v);
void rename_src_vec(node *n, vvec &vv, bool src);
void rename_dst_vec(node *def, vvec &vv, bool set_def);
void rename_src(node *n);
void rename_dst(node *n);
void rename_phi_args(container_node *phi, unsigned op, bool def);
void rename_virt(node *n);
void rename_virt_val(node *n, value *v);
};
class bc_finalizer : public pass {
cf_node *last_export[EXP_TYPE_COUNT];
cf_node *last_cf;
unsigned ngpr;
unsigned nstack;
public:
bc_finalizer(shader &sh) : pass(sh), last_export(), last_cf(), ngpr(),
nstack() {}
virtual int run();
void finalize_loop(region_node *r);
void finalize_if(region_node *r);
void run_on(container_node *c);
void insert_rv6xx_load_ar_workaround(alu_group_node *b4);
void finalize_alu_group(alu_group_node *g, node *prev_node);
bool finalize_alu_src(alu_group_node *g, alu_node *a, alu_group_node *prev_node);
void emit_set_grad(fetch_node* f);
void finalize_fetch(fetch_node *f);
void finalize_cf(cf_node *c);
sel_chan translate_kcache(cf_node *alu, value *v);
void update_ngpr(unsigned gpr);
void update_nstack(region_node *r, unsigned add = 0);
unsigned get_stack_depth(node *n, unsigned &loops, unsigned &ifs,
unsigned add = 0);
void cf_peephole();
private:
void copy_fetch_src(fetch_node &dst, fetch_node &src, unsigned arg_start);
void emit_set_texture_offsets(fetch_node &f);
};
} // namespace r600_sb
#endif /* SB_PASS_H_ */