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glsl/opt_algebraic: Drop and/or/xor optimizations.

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NIR has them, and if anything freedreno shader-db prefers that NIR sees them:

total instructions in shared programs: 11013112 -> 11013100 (<.01%)
instructions in affected programs: 26266 -> 26254 (-0.05%)
helped: 4
HURT: 0

Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21475>
This commit is contained in:
Emma Anholt
2023-02-22 11:59:18 -08:00
committed by Marge Bot
parent ab7a9b4538
commit 4fc9342fc6
1 changed files with 0 additions and 60 deletions
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60
src/compiler/glsl/opt_algebraic.cpp
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@@ -563,66 +563,6 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
ir->operands[1]); ir->operands[1]);
break; break;
case ir_binop_logic_and:
if (is_vec_one(op_const[0])) {
return ir->operands[1];
} else if (is_vec_one(op_const[1])) {
return ir->operands[0];
} else if (is_vec_zero(op_const[0]) || is_vec_zero(op_const[1])) {
return ir_constant::zero(mem_ctx, ir->type);
} else if (op_expr[0] && op_expr[0]->operation == ir_unop_logic_not &&
op_expr[1] && op_expr[1]->operation == ir_unop_logic_not) {
/* De Morgan's Law:
* (not A) and (not B) === not (A or B)
*/
return logic_not(logic_or(op_expr[0]->operands[0],
op_expr[1]->operands[0]));
} else if (ir->operands[0]->equals(ir->operands[1])) {
/* (a && a) == a */
return ir->operands[0];
}
break;
case ir_binop_logic_xor:
if (is_vec_zero(op_const[0])) {
return ir->operands[1];
} else if (is_vec_zero(op_const[1])) {
return ir->operands[0];
} else if (is_vec_one(op_const[0])) {
return logic_not(ir->operands[1]);
} else if (is_vec_one(op_const[1])) {
return logic_not(ir->operands[0]);
} else if (ir->operands[0]->equals(ir->operands[1])) {
/* (a ^^ a) == false */
return ir_constant::zero(mem_ctx, ir->type);
}
break;
case ir_binop_logic_or:
if (is_vec_zero(op_const[0])) {
return ir->operands[1];
} else if (is_vec_zero(op_const[1])) {
return ir->operands[0];
} else if (is_vec_one(op_const[0]) || is_vec_one(op_const[1])) {
ir_constant_data data;
for (unsigned i = 0; i < 16; i++)
data.b[i] = true;
return new(mem_ctx) ir_constant(ir->type, &data);
} else if (op_expr[0] && op_expr[0]->operation == ir_unop_logic_not &&
op_expr[1] && op_expr[1]->operation == ir_unop_logic_not) {
/* De Morgan's Law:
* (not A) or (not B) === not (A and B)
*/
return logic_not(logic_and(op_expr[0]->operands[0],
op_expr[1]->operands[0]));
} else if (ir->operands[0]->equals(ir->operands[1])) {
/* (a || a) == a */
return ir->operands[0];
}
break;
case ir_binop_min: case ir_binop_min:
case ir_binop_max: case ir_binop_max:
if (!ir->type->is_float()) if (!ir->type->is_float())