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[naga] Hoist ConstantEvaluator construction in process_function.

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There's no need to build a fresh `ConstantEvaluator` for every
expression; just build it once and reuse it.
This commit is contained in:
Jim Blandy 2024-03-23 07:53:39 -07:00 committed by Teodor Tanasoaia
parent f464598646
commit aaf3b17623
1 changed files with 12 additions and 12 deletions
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24
naga/src/back/pipeline_constants.rs
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@ -282,18 +282,18 @@ fn process_function(
let mut emitter = Emitter::default();
let mut block = Block::new();
for (old_h, expr, span) in expressions.drain() {
let mut expr = match expr {
Expression::Override(h) => Expression::Constant(override_map[h.index()]),
expr => expr,
};
let mut evaluator = ConstantEvaluator::for_wgsl_function(
module,
&mut function.expressions,
&mut local_expression_kind_tracker,
&mut emitter,
&mut block,
);
let mut evaluator = ConstantEvaluator::for_wgsl_function(
module,
&mut function.expressions,
&mut local_expression_kind_tracker,
&mut emitter,
&mut block,
);
for (old_h, mut expr, span) in expressions.drain() {
if let Expression::Override(h) = expr {
expr = Expression::Constant(override_map[h.index()]);
}
adjust_expr(&adjusted_local_expressions, &mut expr);
let h = evaluator.try_eval_and_append(expr, span)?;
debug_assert_eq!(old_h.index(), adjusted_local_expressions.len());