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https://github.com/encounter/dawn-cmake.git
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ed86bf99b0
Performs basic peephole optimizations on the AST. Use in transform::Hlsl. Required to have the DecomposeStorageAccess transform operate correctly with the output of InlinePointerLets transform, specifically when declaring `let` pointer expressions to storage buffers. Fixed: tint:221 Fixed: tint:492 Fixed: tint:829 Change-Id: I536390921a6492378104e9c3c100d9e761294a27 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/51921 Commit-Queue: Ben Clayton <bclayton@chromium.org> Reviewed-by: David Neto <dneto@google.com>
113 lines
2.2 KiB
C++
113 lines
2.2 KiB
C++
// Copyright 2021 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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#include "src/transform/simplify.h"
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#include <memory>
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#include <utility>
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#include <vector>
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#include "src/transform/test_helper.h"
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namespace tint {
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namespace transform {
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namespace {
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using SimplifyTest = TransformTest;
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TEST_F(SimplifyTest, EmptyModule) {
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auto* src = "";
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auto* expect = "";
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auto got = Run<Simplify>(src);
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EXPECT_EQ(expect, str(got));
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}
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TEST_F(SimplifyTest, AddressOfDeref) {
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auto* src = R"(
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fn f() {
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var v : i32;
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let p : ptr<function, i32> = &(v);
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let x : ptr<function, i32> = &(*(p));
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let y : ptr<function, i32> = &(*(&(*(p))));
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let z : ptr<function, i32> = &(*(&(*(&(*(&(*(p))))))));
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}
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)";
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auto* expect = R"(
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fn f() {
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var v : i32;
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let p : ptr<function, i32> = &(v);
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let x : ptr<function, i32> = p;
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let y : ptr<function, i32> = p;
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let z : ptr<function, i32> = p;
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}
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)";
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auto got = Run<Simplify>(src);
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EXPECT_EQ(expect, str(got));
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}
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TEST_F(SimplifyTest, DerefAddressOf) {
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auto* src = R"(
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fn f() {
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var v : i32;
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let x : i32 = *(&(v));
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let y : i32 = *(&(*(&(v))));
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let z : i32 = *(&(*(&(*(&(*(&(v))))))));
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}
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)";
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auto* expect = R"(
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fn f() {
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var v : i32;
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let x : i32 = v;
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let y : i32 = v;
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let z : i32 = v;
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}
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)";
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auto got = Run<Simplify>(src);
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EXPECT_EQ(expect, str(got));
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}
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TEST_F(SimplifyTest, NoChange) {
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auto* src = R"(
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fn f() {
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var v : i32;
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let p : ptr<function, i32> = &(v);
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let x : i32 = *(p);
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}
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)";
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auto* expect = R"(
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fn f() {
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var v : i32;
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let p : ptr<function, i32> = &(v);
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let x : i32 = *(p);
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}
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)";
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auto got = Run<Simplify>(src);
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EXPECT_EQ(expect, str(got));
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}
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} // namespace
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} // namespace transform
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} // namespace tint
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