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glsl/opt_algebraic: Drop shifts of 0 optimizations.

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No change on freedreno shader-db.

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 11:48:05 -08:00
committed by Marge Bot
parent 71c0c73f8e
commit bb1b37e6c1
1 changed files with 0 additions and 10 deletions
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10
src/compiler/glsl/opt_algebraic.cpp
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@@ -575,16 +575,6 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
ir->operands[1]);
break;
case ir_binop_rshift:
case ir_binop_lshift:
/* 0 >> x == 0 */
if (is_vec_zero(op_const[0]))
return ir->operands[0];
/* x >> 0 == x */
if (is_vec_zero(op_const[1]))
return ir->operands[0];
break;
case ir_binop_logic_and:
if (is_vec_one(op_const[0])) {
return ir->operands[1];