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pan/midgard: Copypropagate vector creation

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total instructions in shared programs: 3457 -> 3431 (-0.75%)
instructions in affected programs: 787 -> 761 (-3.30%)
helped: 14
HURT: 0
helped stats (abs) min: 1 max: 12 x̄: 1.86 x̃: 1
helped stats (rel) min: 1.01% max: 11.11% x̄: 9.22% x̃: 11.11%
95% mean confidence interval for instructions value: -3.55 -0.16
95% mean confidence interval for instructions %-change: -11.41% -7.03%
Instructions are helped.

total bundles in shared programs: 1830 -> 1826 (-0.22%)
bundles in affected programs: 279 -> 275 (-1.43%)
helped: 2
HURT: 0

total quadwords in shared programs: 3144 -> 3121 (-0.73%)
quadwords in affected programs: 645 -> 622 (-3.57%)
helped: 13
HURT: 0
helped stats (abs) min: 1 max: 11 x̄: 1.77 x̃: 1
helped stats (rel) min: 2.09% max: 16.67% x̄: 12.61% x̃: 14.29%
95% mean confidence interval for quadwords value: -3.45 -0.09
95% mean confidence interval for quadwords %-change: -15.43% -9.79%
Quadwords are helped.

total registers in shared programs: 303 -> 301 (-0.66%)
registers in affected programs: 14 -> 12 (-14.29%)
helped: 2
HURT: 0

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-11-08 13:27:39 -05:00
parent 39b5f2fa0b
commit f72873e6aa
1 changed files with 45 additions and 1 deletions
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46
src/panfrost/midgard/midgard_opt_copy_prop.c
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@ -25,6 +25,50 @@
#include "compiler.h"
#include "midgard_ops.h"
/* Special case for copypropagating the results of vectors */
static bool
midgard_opt_copy_prop_reg(compiler_context *ctx, midgard_block *block)
{
bool progress = false;
mir_foreach_instr_in_block_safe(block, ins) {
if (ins->type != TAG_ALU_4) continue;
if (!OP_IS_MOVE(ins->alu.op)) continue;
unsigned from = ins->src[1];
unsigned to = ins->dest;
if (!(to & IS_REG)) continue;
if (from & IS_REG) continue;
if (ins->has_inline_constant) continue;
if (ins->has_constants) continue;
if (mir_nontrivial_source2_mod(ins)) continue;
if (mir_nontrivial_outmod(ins)) continue;
if (!mir_single_use(ctx, ins->src[1])) continue;
bool bad = false;
mir_foreach_instr_global(ctx, c) {
if (mir_has_arg(c, ins->src[1])) {
if (ins->mask != c->mask)
bad = true;
}
}
if (bad)
continue;
mir_rewrite_index_dst(ctx, ins->src[1], ins->dest);
mir_remove_instruction(ins);
progress |= true;
}
return progress;
}
bool
midgard_opt_copy_prop(compiler_context *ctx, midgard_block *block)
{
@ -90,5 +134,5 @@ midgard_opt_copy_prop(compiler_context *ctx, midgard_block *block)
progress |= true;
}
return progress;
return progress | midgard_opt_copy_prop_reg(ctx, block);
}