src/resolver/storage_class_layout_validation_test.cc - tint - Git at Google

 // Copyright 2021 The Tint Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "src/resolver/resolver.h"

 #include "gmock/gmock.h"
 #include "src/resolver/resolver_test_helper.h"

 namespace tint {
 namespace resolver {
 namespace {

 using ResolverStorageClassLayoutValidationTest = ResolverTest;

 // Detect unaligned member for storage buffers
 TEST_F(ResolverStorageClassLayoutValidationTest,
        StorageBuffer_UnalignedMember) {
   // [[block]]
   // struct S {
   //     [[size(5)]] a : f32;
   //     [[align(1)]] b : f32;
   // };
   // [[group(0), binding(0)]]
   // var<storage> a : S;

   Structure(Source{{12, 34}}, "S",
             {Member("a", ty.f32(), {MemberSize(5)}),
              Member(Source{{34, 56}}, "b", ty.f32(), {MemberAlign(1)})},
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("S"), ast::StorageClass::kStorage,
          GroupAndBinding(0, 0));

   ASSERT_FALSE(r()->Resolve());
   EXPECT_EQ(
       r()->error(),
       R"(34:56 error: the offset of a struct member of type 'f32' in storage class 'storage' must be a multiple of 4 bytes, but 'b' is currently at offset 5. Consider setting [[align(4)]] on this member
 12:34 note: see layout of struct:
 /*           align(4) size(12) */ struct S {
 /* offset(0) align(4) size( 5) */   a : f32;
 /* offset(5) align(1) size( 4) */   b : f32;
 /* offset(9) align(1) size( 3) */   // -- implicit struct size padding --;
 /*                             */ };
 78:90 note: see declaration of variable)");
 }

 TEST_F(ResolverStorageClassLayoutValidationTest,
        StorageBuffer_UnalignedMember_SuggestedFix) {
   // [[block]]
   // struct S {
   //     [[size(5)]] a : f32;
   //     [[align(4)]] b : f32;
   // };
   // [[group(0), binding(0)]]
   // var<storage> a : S;

   Structure(Source{{12, 34}}, "S",
             {Member("a", ty.f32(), {MemberSize(5)}),
              Member(Source{{34, 56}}, "b", ty.f32(), {MemberAlign(4)})},
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("S"), ast::StorageClass::kStorage,
          GroupAndBinding(0, 0));

   ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 // Detect unaligned struct member for uniform buffers
 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_UnalignedMember_Struct) {
   // struct Inner {
   //   scalar : i32;
   // };
   //
   // [[block]]
   // struct Outer {
   //   scalar : f32;
   //   inner : Inner;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Structure(Source{{12, 34}}, "Inner", {Member("scalar", ty.i32())});

   Structure(Source{{34, 56}}, "Outer",
             {
                 Member("scalar", ty.f32()),
                 Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_FALSE(r()->Resolve());
   EXPECT_EQ(
       r()->error(),
       R"(56:78 error: the offset of a struct member of type 'Inner' in storage class 'uniform' must be a multiple of 16 bytes, but 'inner' is currently at offset 4. Consider setting [[align(16)]] on this member
 34:56 note: see layout of struct:
 /*           align(4) size(8) */ struct Outer {
 /* offset(0) align(4) size(4) */   scalar : f32;
 /* offset(4) align(4) size(4) */   inner : Inner;
 /*                            */ };
 12:34 note: and layout of struct member:
 /*           align(4) size(4) */ struct Inner {
 /* offset(0) align(4) size(4) */   scalar : i32;
 /*                            */ };
 78:90 note: see declaration of variable)");
 }

 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_UnalignedMember_Struct_SuggestedFix) {
   // struct Inner {
   //   scalar : i32;
   // };
   //
   // [[block]]
   // struct Outer {
   //   scalar : f32;
   //   [[align(16)]] inner : Inner;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Structure(Source{{12, 34}}, "Inner", {Member("scalar", ty.i32())});

   Structure(Source{{34, 56}}, "Outer",
             {
                 Member("scalar", ty.f32()),
                 Member(Source{{56, 78}}, "inner", ty.type_name("Inner"),
                        {MemberAlign(16)}),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 // Detect unaligned array member for uniform buffers
 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_UnalignedMember_Array) {
   // type Inner = [[stride(16)]] array<f32, 10>;
   //
   // [[block]]
   // struct Outer {
   //   scalar : f32;
   //   inner : Inner;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;
   Alias("Inner", ty.array(ty.f32(), 10, 16));

   Structure(Source{{12, 34}}, "Outer",
             {
                 Member("scalar", ty.f32()),
                 Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_FALSE(r()->Resolve());
   EXPECT_EQ(
       r()->error(),
       R"(56:78 error: the offset of a struct member of type '[[stride(16)]] array<f32, 10>' in storage class 'uniform' must be a multiple of 16 bytes, but 'inner' is currently at offset 4. Consider setting [[align(16)]] on this member
 12:34 note: see layout of struct:
 /*             align(4) size(164) */ struct Outer {
 /* offset(  0) align(4) size(  4) */   scalar : f32;
 /* offset(  4) align(4) size(160) */   inner : [[stride(16)]] array<f32, 10>;
 /*                                */ };
 78:90 note: see declaration of variable)");
 }

 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_UnalignedMember_Array_SuggestedFix) {
   // type Inner = [[stride(16)]] array<f32, 10>;
   //
   // [[block]]
   // struct Outer {
   //   scalar : f32;
   //   [[align(16)]] inner : Inner;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;
   Alias("Inner", ty.array(ty.f32(), 10, 16));

   Structure(Source{{12, 34}}, "Outer",
             {
                 Member("scalar", ty.f32()),
                 Member(Source{{34, 56}}, "inner", ty.type_name("Inner"),
                        {MemberAlign(16)}),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 // Detect uniform buffers with byte offset between 2 members that is not a
 // multiple of 16 bytes
 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_MembersOffsetNotMultipleOf16) {
   // struct Inner {
   //   [[align(1), size(5)]] scalar : i32;
   // };
   //
   // [[block]]
   // struct Outer {
   //   inner : Inner;
   //   scalar : i32;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Structure(Source{{12, 34}}, "Inner",
             {Member("scalar", ty.i32(), {MemberAlign(1), MemberSize(5)})});

   Structure(Source{{34, 56}}, "Outer",
             {
                 Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
                 Member(Source{{78, 90}}, "scalar", ty.i32()),
             },
             {StructBlock()});

   Global(Source{{22, 24}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_FALSE(r()->Resolve());
   EXPECT_EQ(
       r()->error(),
       R"(78:90 error: uniform storage requires that the number of bytes between the start of the previous member of type struct and the current member be a multiple of 16 bytes, but there are currently 8 bytes between 'inner' and 'scalar'. Consider setting [[align(16)]] on this member
 34:56 note: see layout of struct:
 /*            align(4) size(12) */ struct Outer {
 /* offset( 0) align(1) size( 5) */   inner : Inner;
 /* offset( 5) align(1) size( 3) */   // -- implicit field alignment padding --;
 /* offset( 8) align(4) size( 4) */   scalar : i32;
 /*                              */ };
 12:34 note: and layout of previous member struct:
 /*           align(1) size(5) */ struct Inner {
 /* offset(0) align(1) size(5) */   scalar : i32;
 /*                            */ };
 22:24 note: see declaration of variable)");
 }

 // See https://crbug.com/tint/1344
 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_MembersOffsetNotMultipleOf16_InnerMoreMembersThanOuter) {
   // struct Inner {
   //   a : i32;
   //   b : i32;
   //   c : i32;
   //   [[align(1), size(5)]] scalar : i32;
   // };
   //
   // [[block]]
   // struct Outer {
   //   inner : Inner;
   //   scalar : i32;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Structure(Source{{12, 34}}, "Inner",
             {
                 Member("a", ty.i32()),
                 Member("b", ty.i32()),
                 Member("c", ty.i32()),
                 Member("scalar", ty.i32(), {MemberAlign(1), MemberSize(5)}),
             });

   Structure(Source{{34, 56}}, "Outer",
             {
                 Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
                 Member(Source{{78, 90}}, "scalar", ty.i32()),
             },
             {StructBlock()});

   Global(Source{{22, 24}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_FALSE(r()->Resolve());
   EXPECT_EQ(
       r()->error(),
       R"(78:90 error: uniform storage requires that the number of bytes between the start of the previous member of type struct and the current member be a multiple of 16 bytes, but there are currently 20 bytes between 'inner' and 'scalar'. Consider setting [[align(16)]] on this member
 34:56 note: see layout of struct:
 /*            align(4) size(24) */ struct Outer {
 /* offset( 0) align(4) size(20) */   inner : Inner;
 /* offset(20) align(4) size( 4) */   scalar : i32;
 /*                              */ };
 12:34 note: and layout of previous member struct:
 /*            align(4) size(20) */ struct Inner {
 /* offset( 0) align(4) size( 4) */   a : i32;
 /* offset( 4) align(4) size( 4) */   b : i32;
 /* offset( 8) align(4) size( 4) */   c : i32;
 /* offset(12) align(1) size( 5) */   scalar : i32;
 /* offset(17) align(1) size( 3) */   // -- implicit struct size padding --;
 /*                              */ };
 22:24 note: see declaration of variable)");
 }

 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_MembersOffsetNotMultipleOf16_SuggestedFix) {
   // struct Inner {
   //   [[align(1), size(5)]] scalar : i32;
   // };
   //
   // [[block]]
   // struct Outer {
   //   [[align(16)]] inner : Inner;
   //   scalar : i32;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Structure(Source{{12, 34}}, "Inner",
             {Member("scalar", ty.i32(), {MemberAlign(1), MemberSize(5)})});

   Structure(Source{{34, 56}}, "Outer",
             {
                 Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
                 Member(Source{{78, 90}}, "scalar", ty.i32(), {MemberAlign(16)}),
             },
             {StructBlock()});

   Global(Source{{22, 34}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 // Make sure that this doesn't fail validation because vec3's align is 16, but
 // size is 12. 's' should be at offset 12, which is okay here.
 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_Vec3MemberOffset_NoFail) {
   // [[block]]
   // struct ScalarPackedAtEndOfVec3 {
   //     v : vec3<f32>;
   //     s : f32;
   // };
   // [[group(0), binding(0)]]
   // var<uniform> a : ScalarPackedAtEndOfVec3;

   Structure("ScalarPackedAtEndOfVec3",
             {
                 Member("v", ty.vec3(ty.f32())),
                 Member("s", ty.f32()),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("ScalarPackedAtEndOfVec3"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 // Detect array stride must be a multiple of 16 bytes for uniform buffers
 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_InvalidArrayStride) {
   // type Inner = [[stride(8)]] array<f32, 10>;
   //
   // [[block]]
   // struct Outer {
   //   inner : Inner;
   //   scalar : i32;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Alias("Inner", ty.array(ty.f32(), 10, 8));

   Structure(Source{{12, 34}}, "Outer",
             {
                 Member("inner", ty.type_name(Source{{34, 56}}, "Inner")),
                 Member("scalar", ty.i32()),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_FALSE(r()->Resolve());
   EXPECT_EQ(
       r()->error(),
       R"(34:56 error: uniform storage requires that array elements be aligned to 16 bytes, but array stride of 'inner' is currently 8. Consider setting [[stride(16)]] on the array type
 12:34 note: see layout of struct:
 /*            align(4) size(84) */ struct Outer {
 /* offset( 0) align(4) size(80) */   inner : [[stride(8)]] array<f32, 10>;
 /* offset(80) align(4) size( 4) */   scalar : i32;
 /*                              */ };
 78:90 note: see declaration of variable)");
 }

 TEST_F(ResolverStorageClassLayoutValidationTest,
        UniformBuffer_InvalidArrayStride_SuggestedFix) {
   // type Inner = [[stride(16)]] array<f32, 10>;
   //
   // [[block]]
   // struct Outer {
   //   inner : Inner;
   //   scalar : i32;
   // };
   //
   // [[group(0), binding(0)]]
   // var<uniform> a : Outer;

   Alias("Inner", ty.array(ty.f32(), 10, 16));

   Structure(Source{{12, 34}}, "Outer",
             {
                 Member("inner", ty.type_name(Source{{34, 56}}, "Inner")),
                 Member("scalar", ty.i32()),
             },
             {StructBlock()});

   Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
          ast::StorageClass::kUniform, GroupAndBinding(0, 0));

   ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 }  // namespace
 }  // namespace resolver
 }  // namespace tint
	// Copyright 2021 The Tint Authors.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "src/resolver/resolver.h"

	#include "gmock/gmock.h"
	#include "src/resolver/resolver_test_helper.h"

	namespace tint {
	namespace resolver {
	namespace {

	using ResolverStorageClassLayoutValidationTest = ResolverTest;

	// Detect unaligned member for storage buffers
	TEST_F(ResolverStorageClassLayoutValidationTest,
	StorageBuffer_UnalignedMember) {
	// [[block]]
	// struct S {
	// [[size(5)]] a : f32;
	// [[align(1)]] b : f32;
	// };
	// [[group(0), binding(0)]]
	// var<storage> a : S;

	Structure(Source{{12, 34}}, "S",
	{Member("a", ty.f32(), {MemberSize(5)}),
	Member(Source{{34, 56}}, "b", ty.f32(), {MemberAlign(1)})},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("S"), ast::StorageClass::kStorage,
	GroupAndBinding(0, 0));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(34:56 error: the offset of a struct member of type 'f32' in storage class 'storage' must be a multiple of 4 bytes, but 'b' is currently at offset 5. Consider setting [[align(4)]] on this member
	12:34 note: see layout of struct:
	/* align(4) size(12) */ struct S {
	/* offset(0) align(4) size( 5) */ a : f32;
	/* offset(5) align(1) size( 4) */ b : f32;
	/* offset(9) align(1) size( 3) */ // -- implicit struct size padding --;
	/* */ };
	78:90 note: see declaration of variable)");
	}

	TEST_F(ResolverStorageClassLayoutValidationTest,
	StorageBuffer_UnalignedMember_SuggestedFix) {
	// [[block]]
	// struct S {
	// [[size(5)]] a : f32;
	// [[align(4)]] b : f32;
	// };
	// [[group(0), binding(0)]]
	// var<storage> a : S;

	Structure(Source{{12, 34}}, "S",
	{Member("a", ty.f32(), {MemberSize(5)}),
	Member(Source{{34, 56}}, "b", ty.f32(), {MemberAlign(4)})},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("S"), ast::StorageClass::kStorage,
	GroupAndBinding(0, 0));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	// Detect unaligned struct member for uniform buffers
	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_UnalignedMember_Struct) {
	// struct Inner {
	// scalar : i32;
	// };
	//
	// [[block]]
	// struct Outer {
	// scalar : f32;
	// inner : Inner;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Structure(Source{{12, 34}}, "Inner", {Member("scalar", ty.i32())});

	Structure(Source{{34, 56}}, "Outer",
	{
	Member("scalar", ty.f32()),
	Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: the offset of a struct member of type 'Inner' in storage class 'uniform' must be a multiple of 16 bytes, but 'inner' is currently at offset 4. Consider setting [[align(16)]] on this member
	34:56 note: see layout of struct:
	/* align(4) size(8) */ struct Outer {
	/* offset(0) align(4) size(4) */ scalar : f32;
	/* offset(4) align(4) size(4) */ inner : Inner;
	/* */ };
	12:34 note: and layout of struct member:
	/* align(4) size(4) */ struct Inner {
	/* offset(0) align(4) size(4) */ scalar : i32;
	/* */ };
	78:90 note: see declaration of variable)");
	}

	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_UnalignedMember_Struct_SuggestedFix) {
	// struct Inner {
	// scalar : i32;
	// };
	//
	// [[block]]
	// struct Outer {
	// scalar : f32;
	// [[align(16)]] inner : Inner;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Structure(Source{{12, 34}}, "Inner", {Member("scalar", ty.i32())});

	Structure(Source{{34, 56}}, "Outer",
	{
	Member("scalar", ty.f32()),
	Member(Source{{56, 78}}, "inner", ty.type_name("Inner"),
	{MemberAlign(16)}),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	// Detect unaligned array member for uniform buffers
	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_UnalignedMember_Array) {
	// type Inner = [[stride(16)]] array<f32, 10>;
	//
	// [[block]]
	// struct Outer {
	// scalar : f32;
	// inner : Inner;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;
	Alias("Inner", ty.array(ty.f32(), 10, 16));

	Structure(Source{{12, 34}}, "Outer",
	{
	Member("scalar", ty.f32()),
	Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: the offset of a struct member of type '[[stride(16)]] array<f32, 10>' in storage class 'uniform' must be a multiple of 16 bytes, but 'inner' is currently at offset 4. Consider setting [[align(16)]] on this member
	12:34 note: see layout of struct:
	/* align(4) size(164) */ struct Outer {
	/* offset( 0) align(4) size( 4) */ scalar : f32;
	/* offset( 4) align(4) size(160) */ inner : [[stride(16)]] array<f32, 10>;
	/* */ };
	78:90 note: see declaration of variable)");
	}

	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_UnalignedMember_Array_SuggestedFix) {
	// type Inner = [[stride(16)]] array<f32, 10>;
	//
	// [[block]]
	// struct Outer {
	// scalar : f32;
	// [[align(16)]] inner : Inner;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;
	Alias("Inner", ty.array(ty.f32(), 10, 16));

	Structure(Source{{12, 34}}, "Outer",
	{
	Member("scalar", ty.f32()),
	Member(Source{{34, 56}}, "inner", ty.type_name("Inner"),
	{MemberAlign(16)}),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	// Detect uniform buffers with byte offset between 2 members that is not a
	// multiple of 16 bytes
	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_MembersOffsetNotMultipleOf16) {
	// struct Inner {
	// [[align(1), size(5)]] scalar : i32;
	// };
	//
	// [[block]]
	// struct Outer {
	// inner : Inner;
	// scalar : i32;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Structure(Source{{12, 34}}, "Inner",
	{Member("scalar", ty.i32(), {MemberAlign(1), MemberSize(5)})});

	Structure(Source{{34, 56}}, "Outer",
	{
	Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
	Member(Source{{78, 90}}, "scalar", ty.i32()),
	},
	{StructBlock()});

	Global(Source{{22, 24}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(78:90 error: uniform storage requires that the number of bytes between the start of the previous member of type struct and the current member be a multiple of 16 bytes, but there are currently 8 bytes between 'inner' and 'scalar'. Consider setting [[align(16)]] on this member
	34:56 note: see layout of struct:
	/* align(4) size(12) */ struct Outer {
	/* offset( 0) align(1) size( 5) */ inner : Inner;
	/* offset( 5) align(1) size( 3) */ // -- implicit field alignment padding --;
	/* offset( 8) align(4) size( 4) */ scalar : i32;
	/* */ };
	12:34 note: and layout of previous member struct:
	/* align(1) size(5) */ struct Inner {
	/* offset(0) align(1) size(5) */ scalar : i32;
	/* */ };
	22:24 note: see declaration of variable)");
	}

	// See https://crbug.com/tint/1344
	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_MembersOffsetNotMultipleOf16_InnerMoreMembersThanOuter) {
	// struct Inner {
	// a : i32;
	// b : i32;
	// c : i32;
	// [[align(1), size(5)]] scalar : i32;
	// };
	//
	// [[block]]
	// struct Outer {
	// inner : Inner;
	// scalar : i32;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Structure(Source{{12, 34}}, "Inner",
	{
	Member("a", ty.i32()),
	Member("b", ty.i32()),
	Member("c", ty.i32()),
	Member("scalar", ty.i32(), {MemberAlign(1), MemberSize(5)}),
	});

	Structure(Source{{34, 56}}, "Outer",
	{
	Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
	Member(Source{{78, 90}}, "scalar", ty.i32()),
	},
	{StructBlock()});

	Global(Source{{22, 24}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(78:90 error: uniform storage requires that the number of bytes between the start of the previous member of type struct and the current member be a multiple of 16 bytes, but there are currently 20 bytes between 'inner' and 'scalar'. Consider setting [[align(16)]] on this member
	34:56 note: see layout of struct:
	/* align(4) size(24) */ struct Outer {
	/* offset( 0) align(4) size(20) */ inner : Inner;
	/* offset(20) align(4) size( 4) */ scalar : i32;
	/* */ };
	12:34 note: and layout of previous member struct:
	/* align(4) size(20) */ struct Inner {
	/* offset( 0) align(4) size( 4) */ a : i32;
	/* offset( 4) align(4) size( 4) */ b : i32;
	/* offset( 8) align(4) size( 4) */ c : i32;
	/* offset(12) align(1) size( 5) */ scalar : i32;
	/* offset(17) align(1) size( 3) */ // -- implicit struct size padding --;
	/* */ };
	22:24 note: see declaration of variable)");
	}

	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_MembersOffsetNotMultipleOf16_SuggestedFix) {
	// struct Inner {
	// [[align(1), size(5)]] scalar : i32;
	// };
	//
	// [[block]]
	// struct Outer {
	// [[align(16)]] inner : Inner;
	// scalar : i32;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Structure(Source{{12, 34}}, "Inner",
	{Member("scalar", ty.i32(), {MemberAlign(1), MemberSize(5)})});

	Structure(Source{{34, 56}}, "Outer",
	{
	Member(Source{{56, 78}}, "inner", ty.type_name("Inner")),
	Member(Source{{78, 90}}, "scalar", ty.i32(), {MemberAlign(16)}),
	},
	{StructBlock()});

	Global(Source{{22, 34}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	// Make sure that this doesn't fail validation because vec3's align is 16, but
	// size is 12. 's' should be at offset 12, which is okay here.
	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_Vec3MemberOffset_NoFail) {
	// [[block]]
	// struct ScalarPackedAtEndOfVec3 {
	// v : vec3<f32>;
	// s : f32;
	// };
	// [[group(0), binding(0)]]
	// var<uniform> a : ScalarPackedAtEndOfVec3;

	Structure("ScalarPackedAtEndOfVec3",
	{
	Member("v", ty.vec3(ty.f32())),
	Member("s", ty.f32()),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("ScalarPackedAtEndOfVec3"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	// Detect array stride must be a multiple of 16 bytes for uniform buffers
	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_InvalidArrayStride) {
	// type Inner = [[stride(8)]] array<f32, 10>;
	//
	// [[block]]
	// struct Outer {
	// inner : Inner;
	// scalar : i32;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Alias("Inner", ty.array(ty.f32(), 10, 8));

	Structure(Source{{12, 34}}, "Outer",
	{
	Member("inner", ty.type_name(Source{{34, 56}}, "Inner")),
	Member("scalar", ty.i32()),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(34:56 error: uniform storage requires that array elements be aligned to 16 bytes, but array stride of 'inner' is currently 8. Consider setting [[stride(16)]] on the array type
	12:34 note: see layout of struct:
	/* align(4) size(84) */ struct Outer {
	/* offset( 0) align(4) size(80) */ inner : [[stride(8)]] array<f32, 10>;
	/* offset(80) align(4) size( 4) */ scalar : i32;
	/* */ };
	78:90 note: see declaration of variable)");
	}

	TEST_F(ResolverStorageClassLayoutValidationTest,
	UniformBuffer_InvalidArrayStride_SuggestedFix) {
	// type Inner = [[stride(16)]] array<f32, 10>;
	//
	// [[block]]
	// struct Outer {
	// inner : Inner;
	// scalar : i32;
	// };
	//
	// [[group(0), binding(0)]]
	// var<uniform> a : Outer;

	Alias("Inner", ty.array(ty.f32(), 10, 16));

	Structure(Source{{12, 34}}, "Outer",
	{
	Member("inner", ty.type_name(Source{{34, 56}}, "Inner")),
	Member("scalar", ty.i32()),
	},
	{StructBlock()});

	Global(Source{{78, 90}}, "a", ty.type_name("Outer"),
	ast::StorageClass::kUniform, GroupAndBinding(0, 0));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	} // namespace
	} // namespace resolver
	} // namespace tint