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intel/fs/ra: Add spill costs to the graph on-demand

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Tested-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand
2019-05-14 23:03:29 -05:00
parent 2c14e2b5bf
commit c19acf321c
1 changed files with 9 additions and 4 deletions
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13
src/intel/compiler/brw_fs_reg_allocate.cpp
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@@ -396,7 +396,8 @@ void fs_visitor::calculate_payload_ranges(int payload_node_count,
class fs_reg_alloc {
public:
fs_reg_alloc(fs_visitor *fs):
fs(fs), devinfo(fs->devinfo), compiler(fs->compiler), g(NULL)
fs(fs), devinfo(fs->devinfo), compiler(fs->compiler), g(NULL),
have_spill_costs(false)
{
mem_ctx = ralloc_context(NULL);
@@ -447,6 +448,7 @@ private:
int rsi;
ra_graph *g;
bool have_spill_costs;
int payload_node_count;
int *payload_last_use_ip;
@@ -796,9 +798,6 @@ fs_reg_alloc::build_interference_graph(bool allow_spilling)
*/
foreach_block_and_inst(block, fs_inst, inst, fs->cfg)
setup_inst_interference(inst);
if (allow_spilling)
set_spill_costs();
}
void
@@ -806,6 +805,7 @@ fs_reg_alloc::discard_interference_graph()
{
ralloc_free(g);
g = NULL;
have_spill_costs = false;
}
static void
@@ -937,11 +937,16 @@ fs_reg_alloc::set_spill_costs()
if (!no_spill[i])
ra_set_node_spill_cost(g, first_vgrf_node + i, adjusted_cost);
}
have_spill_costs = true;
}
int
fs_reg_alloc::choose_spill_reg()
{
if (!have_spill_costs)
set_spill_costs();
int node = ra_get_best_spill_node(g);
if (node < 0)
return -1;