Shader-db results on HSW:
total instructions in shared programs: 4174156 -> 4157291 (-0.40%)
instructions in affected programs: 145397 -> 128532 (-11.60%)
helped: 383
HURT: 0
GAINED: 20
LOST: 22
There are two more tests lost than gained. However, comparing this with
GLSL IR vs. NIR results, the overall delta is reduced from 85/44
gained/lost on current master to 71/32 with this commit. Therefore, I
think it's probably a boon since we are getting "closer" to where we were
before.
---
src/glsl/nir/nir_opt_peephole_select.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/src/glsl/nir/nir_opt_peephole_select.c
b/src/glsl/nir/nir_opt_peephole_select.c
index 7463079..4f953c0 100644
--- a/src/glsl/nir/nir_opt_peephole_select.c
+++ b/src/glsl/nir/nir_opt_peephole_select.c
@@ -56,6 +56,31 @@ block_check_for_allowed_instrs(nir_block *block)
{
nir_foreach_instr(block, instr) {
switch (instr->type) {
+ case nir_instr_type_intrinsic: {
+ nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+ switch (intrin->intrinsic) {
+ case nir_intrinsic_load_var:
+ switch (intrin->variables[0]->var->data.mode) {
+ case nir_var_shader_in:
+ case nir_var_uniform:
+ break;
+
+ default:
+ return false;
+ }
+ break;
+
+ default:
+ return false;
+ }
+
+ break;
+ }
+
+ case nir_instr_type_load_const:
+ break;
+
case nir_instr_type_alu: {
/* It must be a move operation */
nir_alu_instr *mov = nir_instr_as_alu(instr);
--
2.3.2
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