Mesa (master): pan/midgard: Copypropagate vector creation
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Thu Nov 14 02:58:51 UTC 2019
Module: Mesa
Branch: master
Commit: f72873e6aa098b5fe31a89dc467a3baa981aa442
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=f72873e6aa098b5fe31a89dc467a3baa981aa442
Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date: Fri Nov 8 13:27:39 2019 -0500
pan/midgard: Copypropagate vector creation
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 at collabora.com>
---
src/panfrost/midgard/midgard_opt_copy_prop.c | 46 +++++++++++++++++++++++++++-
1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/src/panfrost/midgard/midgard_opt_copy_prop.c b/src/panfrost/midgard/midgard_opt_copy_prop.c
index 7c483b212e5..20e256e6637 100644
--- a/src/panfrost/midgard/midgard_opt_copy_prop.c
+++ b/src/panfrost/midgard/midgard_opt_copy_prop.c
@@ -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);
}
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