mirror of
https://github.com/encounter/dawn-cmake.git
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4a92a3c904
Add a 'NodeID' to each ast::Node which is the sequentially allocated
index of the node. Use this in sem::Info to map the AST node to the
semantic node, instead of using a std::unordered_map.
Optimised very hot code by entirely eliminating map lookups, and
dramatically reducing cache misses (lookups are usually sequentually
ordered).
Timings running
'webgpu:shader,execution,expression,call,builtin,atan2:f32:inputSource="const";vectorize="_undef_"'
with dawn/node, using SwiftShader:
Without change: 3.22647107s
With change: 3.10578879s
Bug: tint:1613
Change-Id: I22ec48d933b2e5f9da04494bff4e979e6f7b1982
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/96140
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright 2020 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TINT_AST_FLOAT_LITERAL_EXPRESSION_H_
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#define SRC_TINT_AST_FLOAT_LITERAL_EXPRESSION_H_
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#include <string>
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#include "src/tint/ast/literal_expression.h"
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namespace tint::ast {
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/// A float literal
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class FloatLiteralExpression final : public Castable<FloatLiteralExpression, LiteralExpression> {
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public:
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/// Literal suffix
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enum class Suffix {
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/// No suffix
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kNone,
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/// 'f' suffix (f32)
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kF,
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/// 'h' suffix (f16)
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kH,
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};
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/// Constructor
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/// @param pid the identifier of the program that owns this node
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/// @param nid the unique node identifier
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/// @param src the source of this node
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/// @param val the literal value
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/// @param suf the literal suffix
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FloatLiteralExpression(ProgramID pid, NodeID nid, const Source& src, double val, Suffix suf);
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~FloatLiteralExpression() override;
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/// Clones this node and all transitive child nodes using the `CloneContext`
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/// `ctx`.
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/// @param ctx the clone context
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/// @return the newly cloned node
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const FloatLiteralExpression* Clone(CloneContext* ctx) const override;
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/// The literal value
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const double value;
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/// The literal suffix
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const Suffix suffix;
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};
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/// Writes the float literal suffix to the std::ostream.
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/// @param out the std::ostream to write to
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/// @param suffix the suffix to write
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/// @returns out so calls can be chained
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std::ostream& operator<<(std::ostream& out, FloatLiteralExpression::Suffix suffix);
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} // namespace tint::ast
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#endif // SRC_TINT_AST_FLOAT_LITERAL_EXPRESSION_H_
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