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intel/compiler: Discount NOPs from instruction counts

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Scheduler changes can cause changes in the number of instructions due to
this workaround, so just don't include NOPs in the instruction counts to
prevent shader-db noise.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4093>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4093>
This commit is contained in:
Matt Turner 2020-02-27 10:48:37 -08:00 • committed by Marge Bot
parent bb3e7b0fe3
commit e924181ea8
1 changed files with 9 additions and 3 deletions
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12
src/intel/compiler/brw_fs_generator.cpp
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@ -1714,7 +1714,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width,
* effect is already counted in spill/fill counts.
*/
int spill_count = 0, fill_count = 0;
int loop_count = 0, send_count = 0;
int loop_count = 0, send_count = 0, nop_count = 0;
bool is_accum_used = false;
struct disasm_info *disasm_info = disasm_initialize(devinfo, cfg);
@ -1744,6 +1744,12 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width,
inst->dst.component_size(inst->exec_size) > REG_SIZE) {
brw_NOP(p);
last_insn_offset = p->next_insn_offset;
/* In order to avoid spurious instruction count differences when the
* instruction schedule changes, keep track of the number of inserted
* NOPs.
*/
nop_count++;
}
/* GEN:BUG:14010017096:
@ -2459,7 +2465,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width,
"Promoted %u constants, "
"compacted %d to %d bytes.",
_mesa_shader_stage_to_abbrev(stage),
dispatch_width, before_size / 16,
dispatch_width, before_size / 16 - nop_count,
loop_count, cfg->cycle_count,
spill_count, fill_count, send_count,
shader_stats.scheduler_mode,
@ -2467,7 +2473,7 @@ fs_generator::generate_code(const cfg_t *cfg, int dispatch_width,
before_size, after_size);
if (stats) {
stats->dispatch_width = dispatch_width;
stats->instructions = before_size / 16;
stats->instructions = before_size / 16 - nop_count;
stats->loops = loop_count;
stats->cycles = cfg->cycle_count;
stats->spills = spill_count;