tint/ast: Clean up StorageClass enum

Remove unused enum entries.
Add a ParseStorageClass() function. Have the WGSL parser use this.

First step to standardizing the way we parse enum-backed token sets.

Change-Id: I31c02816493beeabda740ff43946edce097f5fd1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/97148
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>

src/tint/ast/storage_class.cc

@@ -16,34 +16,52 @@
 
 namespace tint::ast {
 
-const char* ToString(StorageClass sc) {
+/// ParseStorageClass parses a StorageClass from a string.
-    switch (sc) {
+/// @param str the string to parse
-        case StorageClass::kInvalid:
+/// @returns the parsed enum, or StorageClass::kInvalid if the string could not be parsed.
-            return "invalid";
+StorageClass ParseStorageClass(std::string_view str) {
-        case StorageClass::kNone:
+    if (str == "function") {
-            return "none";
+        return StorageClass::kFunction;
-        case StorageClass::kInput:
-            return "in";
-        case StorageClass::kOutput:
-            return "out";
-        case StorageClass::kUniform:
-            return "uniform";
-        case StorageClass::kWorkgroup:
-            return "workgroup";
-        case StorageClass::kHandle:
-            return "handle";
-        case StorageClass::kStorage:
-            return "storage";
-        case StorageClass::kPrivate:
-            return "private";
-        case StorageClass::kFunction:
-            return "function";
     }
-    return "<unknown>";
+    if (str == "private") {
+        return StorageClass::kPrivate;
+    }
+    if (str == "workgroup") {
+        return StorageClass::kWorkgroup;
+    }
+    if (str == "uniform") {
+        return StorageClass::kUniform;
+    }
+    if (str == "storage") {
+        return StorageClass::kStorage;
+    }
+    return StorageClass::kInvalid;
 }
-std::ostream& operator<<(std::ostream& out, StorageClass sc) {
+
-    out << ToString(sc);
+std::ostream& operator<<(std::ostream& out, StorageClass value) {
-    return out;
+    switch (value) {
+        case StorageClass::kInvalid:
+            return out << "invalid";
+        case StorageClass::kNone:
+            return out << "none";
+        case StorageClass::kFunction:
+            return out << "function";
+        case StorageClass::kPrivate:
+            return out << "private";
+        case StorageClass::kWorkgroup:
+            return out << "workgroup";
+        case StorageClass::kUniform:
+            return out << "uniform";
+        case StorageClass::kStorage:
+            return out << "storage";
+        case StorageClass::kHandle:
+            return out << "handle";
+        case StorageClass::kIn:
+            return out << "in";
+        case StorageClass::kOut:
+            return out << "out";
+    }
+    return out << "<unknown>";
 }
 
 }  // namespace tint::ast

src/tint/ast/storage_class.h

@@ -1,4 +1,4 @@
-// Copyright 2020 The Tint Authors.
+// Copyright 2022 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.
@@ -21,18 +21,28 @@ namespace tint::ast {
 
 /// Storage class of a given pointer.
 enum class StorageClass {
-    kInvalid = -1,
+    kInvalid,
     kNone,
-    kInput,
+    kFunction,
-    kOutput,
-    kUniform,
-    kWorkgroup,
-    kHandle,
-    kStorage,
     kPrivate,
-    kFunction
+    kWorkgroup,
+    kUniform,
+    kStorage,
+    kHandle,
+    kIn,
+    kOut,
 };
 
+/// @param out the std::ostream to write to
+/// @param sc the StorageClass
+/// @return the std::ostream so calls can be chained
+std::ostream& operator<<(std::ostream& out, StorageClass sc);
+
+/// ParseStorageClass parses a StorageClass from a string.
+/// @param str the string to parse
+/// @returns the parsed enum, or StorageClass::kInvalid if the string could not be parsed.
+StorageClass ParseStorageClass(std::string_view str);
+
 /// @returns true if the StorageClass is host-shareable
 /// @param sc the StorageClass
 /// @see https://gpuweb.github.io/gpuweb/wgsl.html#host-shareable
@@ -40,15 +50,6 @@ inline bool IsHostShareable(StorageClass sc) {
     return sc == ast::StorageClass::kUniform || sc == ast::StorageClass::kStorage;
 }
 
-/// @param sc the StorageClass
-/// @return the name of the given storage class
-const char* ToString(StorageClass sc);
-
-/// @param out the std::ostream to write to
-/// @param sc the StorageClass
-/// @return the std::ostream so calls can be chained
-std::ostream& operator<<(std::ostream& out, StorageClass sc);
-
 }  // namespace tint::ast
 
 #endif  // SRC_TINT_AST_STORAGE_CLASS_H_

src/tint/inspector/inspector.cc

@@ -49,6 +49,7 @@
 #include "src/tint/sem/vector.h"
 #include "src/tint/sem/void.h"
 #include "src/tint/utils/math.h"
+#include "src/tint/utils/string.h"
 #include "src/tint/utils/unique_vector.h"
 
 namespace tint::inspector {
@@ -570,7 +571,7 @@ std::vector<std::string> Inspector::GetUsedExtensionNames() {
     std::vector<std::string> out;
     out.reserve(extensions.size());
     for (auto ext : extensions) {
-        out.push_back(ast::str(ext));
+        out.push_back(utils::ToString(ext));
     }
     return out;
 }
@@ -582,7 +583,7 @@ std::vector<std::pair<std::string, Source>> Inspector::GetEnableDirectives() {
     auto global_decls = program_->AST().GlobalDeclarations();
     for (auto* node : global_decls) {
         if (auto* ext = node->As<ast::Enable>()) {
-            result.push_back({ast::str(ext->extension), ext->source});
+            result.push_back({utils::ToString(ext->extension), ext->source});
         }
     }
 

src/tint/reader/spirv/enum_converter.cc

@@ -39,9 +39,9 @@ ast::PipelineStage EnumConverter::ToPipelineStage(SpvExecutionModel model) {
 ast::StorageClass EnumConverter::ToStorageClass(const SpvStorageClass sc) {
     switch (sc) {
         case SpvStorageClassInput:
-            return ast::StorageClass::kInput;
+            return ast::StorageClass::kIn;
         case SpvStorageClassOutput:
-            return ast::StorageClass::kOutput;
+            return ast::StorageClass::kOut;
         case SpvStorageClassUniform:
             return ast::StorageClass::kUniform;
         case SpvStorageClassWorkgroup:

src/tint/reader/spirv/enum_converter_test.cc

@@ -125,8 +125,8 @@ INSTANTIATE_TEST_SUITE_P(
     EnumConverterGood,
     SpvStorageClassTest,
     testing::Values(
-        StorageClassCase{SpvStorageClassInput, true, ast::StorageClass::kInput},
+        StorageClassCase{SpvStorageClassInput, true, ast::StorageClass::kIn},
-        StorageClassCase{SpvStorageClassOutput, true, ast::StorageClass::kOutput},
+        StorageClassCase{SpvStorageClassOutput, true, ast::StorageClass::kOut},
         StorageClassCase{SpvStorageClassUniform, true, ast::StorageClass::kUniform},
         StorageClassCase{SpvStorageClassWorkgroup, true, ast::StorageClass::kWorkgroup},
         StorageClassCase{SpvStorageClassUniformConstant, true, ast::StorageClass::kNone},

src/tint/reader/spirv/parser_impl.cc

@@ -1219,8 +1219,8 @@ const Type* ParserImpl::ConvertType(uint32_t type_id,
     }
 
     // Pipeline input and output variables map to private variables.
-    if (ast_storage_class == ast::StorageClass::kInput ||
+    if (ast_storage_class == ast::StorageClass::kIn ||
-        ast_storage_class == ast::StorageClass::kOutput) {
+        ast_storage_class == ast::StorageClass::kOut) {
         ast_storage_class = ast::StorageClass::kPrivate;
     }
     switch (ptr_as) {
@@ -1446,8 +1446,8 @@ bool ParserImpl::EmitModuleScopeVariables() {
         }
         switch (enum_converter_.ToStorageClass(spirv_storage_class)) {
             case ast::StorageClass::kNone:
-            case ast::StorageClass::kInput:
+            case ast::StorageClass::kIn:
-            case ast::StorageClass::kOutput:
+            case ast::StorageClass::kOut:
             case ast::StorageClass::kUniform:
             case ast::StorageClass::kHandle:
             case ast::StorageClass::kStorage:

src/tint/reader/spirv/parser_type.cc

@@ -21,6 +21,7 @@
 #include "src/tint/program_builder.h"
 #include "src/tint/utils/hash.h"
 #include "src/tint/utils/map.h"
+#include "src/tint/utils/string.h"
 #include "src/tint/utils/unique_allocator.h"
 
 TINT_INSTANTIATE_TYPEINFO(tint::reader::spirv::Type);
@@ -518,13 +519,13 @@ std::string I32::String() const {
 
 std::string Pointer::String() const {
     std::stringstream ss;
-    ss << "ptr<" << std::string(ast::ToString(storage_class)) << ", " << type->String() + ">";
+    ss << "ptr<" << utils::ToString(storage_class) << ", " << type->String() + ">";
     return ss.str();
 }
 
 std::string Reference::String() const {
     std::stringstream ss;
-    ss << "ref<" + std::string(ast::ToString(storage_class)) << ", " << type->String() << ">";
+    ss << "ref<" + utils::ToString(storage_class) << ", " << type->String() << ">";
     return ss.str();
 }
 

src/tint/reader/spirv/parser_type_test.cc

@@ -56,7 +56,7 @@ TEST(SpvParserTypeTest, DifferentArgumentsGivesDifferentPointer) {
     EXPECT_NE(ty.Pointer(ty.I32(), ast::StorageClass::kNone),
               ty.Pointer(ty.U32(), ast::StorageClass::kNone));
     EXPECT_NE(ty.Pointer(ty.I32(), ast::StorageClass::kNone),
-              ty.Pointer(ty.I32(), ast::StorageClass::kInput));
+              ty.Pointer(ty.I32(), ast::StorageClass::kIn));
     EXPECT_NE(ty.Vector(ty.I32(), 3), ty.Vector(ty.U32(), 3));
     EXPECT_NE(ty.Vector(ty.I32(), 3), ty.Vector(ty.I32(), 2));
     EXPECT_NE(ty.Matrix(ty.I32(), 3, 2), ty.Matrix(ty.U32(), 3, 2));

src/tint/reader/wgsl/parser_impl.cc

@@ -400,7 +400,7 @@ Maybe<bool> ParserImpl::enable_directive() {
             synchronized_ = true;
             next();
             name = {"f16", t.source()};
-        } else if (t.Is(Token::Type::kParenLeft)){
+        } else if (t.Is(Token::Type::kParenLeft)) {
             // A common error case is writing `enable(foo);` instead of `enable foo;`.
             synchronized_ = false;
             return add_error(t.source(), "enable directives don't take parenthesis");
@@ -1315,28 +1315,12 @@ Expect<ast::StorageClass> ParserImpl::expect_storage_class(std::string_view use)
         return Failure::kErrored;
     }
 
-    auto name = ident.value;
+    auto storage_class = ast::ParseStorageClass(ident.value);
-    if (name == "uniform") {
+    if (storage_class == ast::StorageClass::kInvalid) {
-        return {ast::StorageClass::kUniform, t.source()};
-    }
-
-    if (name == "workgroup") {
-        return {ast::StorageClass::kWorkgroup, t.source()};
-    }
-
-    if (name == "storage" || name == "storage_buffer") {
-        return {ast::StorageClass::kStorage, t.source()};
-    }
-
-    if (name == "private") {
-        return {ast::StorageClass::kPrivate, t.source()};
-    }
-
-    if (name == "function") {
-        return {ast::StorageClass::kFunction, t.source()};
-    }
-
         return add_error(t.source(), "invalid storage class", use);
+    }
+
+    return {storage_class, t.source()};
 }
 
 // struct_decl

src/tint/reader/wgsl/parser_impl_storage_class_test.cc

@@ -46,7 +46,6 @@ INSTANTIATE_TEST_SUITE_P(
     testing::Values(StorageClassData{"uniform", ast::StorageClass::kUniform},
                     StorageClassData{"workgroup", ast::StorageClass::kWorkgroup},
                     StorageClassData{"storage", ast::StorageClass::kStorage},
-                    StorageClassData{"storage_buffer", ast::StorageClass::kStorage},
                     StorageClassData{"private", ast::StorageClass::kPrivate},
                     StorageClassData{"function", ast::StorageClass::kFunction}));
 

src/tint/reader/wgsl/parser_impl_variable_qualifier_test.cc

@@ -50,7 +50,6 @@ INSTANTIATE_TEST_SUITE_P(
         VariableStorageData{"uniform", ast::StorageClass::kUniform, ast::Access::kUndefined},
         VariableStorageData{"workgroup", ast::StorageClass::kWorkgroup, ast::Access::kUndefined},
         VariableStorageData{"storage", ast::StorageClass::kStorage, ast::Access::kUndefined},
-        VariableStorageData{"storage_buffer", ast::StorageClass::kStorage, ast::Access::kUndefined},
         VariableStorageData{"private", ast::StorageClass::kPrivate, ast::Access::kUndefined},
         VariableStorageData{"function", ast::StorageClass::kFunction, ast::Access::kUndefined},
         VariableStorageData{"storage, read", ast::StorageClass::kStorage, ast::Access::kRead},

src/tint/resolver/function_validation_test.cc

@@ -807,8 +807,8 @@ TEST_P(ResolverFunctionParameterValidationTest, StorageClass) {
 INSTANTIATE_TEST_SUITE_P(ResolverTest,
                          ResolverFunctionParameterValidationTest,
                          testing::Values(TestParams{ast::StorageClass::kNone, false},
-                                         TestParams{ast::StorageClass::kInput, false},
+                                         TestParams{ast::StorageClass::kIn, false},
-                                         TestParams{ast::StorageClass::kOutput, false},
+                                         TestParams{ast::StorageClass::kOut, false},
                                          TestParams{ast::StorageClass::kUniform, false},
                                          TestParams{ast::StorageClass::kWorkgroup, true},
                                          TestParams{ast::StorageClass::kHandle, false},

src/tint/resolver/validator.cc

@@ -78,6 +78,7 @@
 #include "src/tint/utils/math.h"
 #include "src/tint/utils/reverse.h"
 #include "src/tint/utils/scoped_assignment.h"
+#include "src/tint/utils/string.h"
 #include "src/tint/utils/transform.h"
 
 namespace tint::resolver {
@@ -344,7 +345,7 @@ bool Validator::VariableInitializer(const ast::Variable* v,
                 // https://gpuweb.github.io/gpuweb/wgsl/#var-and-let
                 // Optionally has an initializer expression, if the variable is in the
                 // private or function storage classes.
-                AddError("var of storage class '" + std::string(ast::ToString(storage_class)) +
+                AddError("var of storage class '" + utils::ToString(storage_class) +
                              "' cannot have an initializer. var initializers are only "
                              "supported for the storage classes "
                              "'private' and 'function'",
@@ -396,8 +397,8 @@ bool Validator::StorageClassLayout(const sem::Type* store_ty,
     // TODO(tint:1473, tint:1502): Remove this error after f16 is supported in "uniform" and
     // "storage" storage class.
     if (Is<sem::F16>(sem::Type::DeepestElementOf(store_ty))) {
-        AddError("using f16 types in '" + std::string(ast::ToString(sc)) +
+        AddError(
-                     "' storage class is not implemented yet",
+            "using f16 types in '" + utils::ToString(sc) + "' storage class is not implemented yet",
             source);
         return false;
     }
@@ -418,7 +419,7 @@ bool Validator::StorageClassLayout(const sem::Type* store_ty,
             if (m->Offset() % required_align != 0) {
                 AddError("the offset of a struct member of type '" +
                              m->Type()->UnwrapRef()->FriendlyName(symbols_) +
-                             "' in storage class '" + ast::ToString(sc) +
+                             "' in storage class '" + utils::ToString(sc) +
                              "' must be a multiple of " + std::to_string(required_align) +
                              " bytes, but '" + member_name_of(m) + "' is currently at offset " +
                              std::to_string(m->Offset()) + ". Consider setting @align(" +
@@ -583,8 +584,8 @@ bool Validator::GlobalVariable(
                 bool is_shader_io_attribute =
                     attr->IsAnyOf<ast::BuiltinAttribute, ast::InterpolateAttribute,
                                   ast::InvariantAttribute, ast::LocationAttribute>();
-                bool has_io_storage_class = global->StorageClass() == ast::StorageClass::kInput ||
+                bool has_io_storage_class = global->StorageClass() == ast::StorageClass::kIn ||
-                                            global->StorageClass() == ast::StorageClass::kOutput;
+                                            global->StorageClass() == ast::StorageClass::kOut;
                 if (!attr->IsAnyOf<ast::BindingAttribute, ast::GroupAttribute,
                                    ast::InternalAttribute>() &&
                     (!is_shader_io_attribute || !has_io_storage_class)) {
@@ -740,8 +741,8 @@ bool Validator::Var(const sem::Variable* v) const {
     }
 
     if (IsValidationEnabled(var->attributes, ast::DisabledValidation::kIgnoreStorageClass) &&
-        (var->declared_storage_class == ast::StorageClass::kInput ||
+        (var->declared_storage_class == ast::StorageClass::kIn ||
-         var->declared_storage_class == ast::StorageClass::kOutput)) {
+         var->declared_storage_class == ast::StorageClass::kOut)) {
         AddError("invalid use of input/output storage class", var->source);
         return false;
     }

src/tint/transform/binding_remapper.cc

@@ -22,6 +22,7 @@
 #include "src/tint/program_builder.h"
 #include "src/tint/sem/function.h"
 #include "src/tint/sem/variable.h"
+#include "src/tint/utils/string.h"
 
 TINT_INSTANTIATE_TYPEINFO(tint::transform::BindingRemapper);
 TINT_INSTANTIATE_TYPEINFO(tint::transform::BindingRemapper::Remappings);
@@ -125,7 +126,7 @@ void BindingRemapper::Run(CloneContext& ctx, const DataMap& inputs, DataMap&) co
                     ctx.dst->Diagnostics().add_error(
                         diag::System::Transform,
                         "cannot apply access control to variable with storage class " +
-                            std::string(ast::ToString(sem->StorageClass())));
+                            std::string(utils::ToString(sem->StorageClass())));
                     return;
                 }
                 auto* ty = sem->Type()->UnwrapRef();

src/tint/transform/canonicalize_entry_point_io.cc

@@ -181,7 +181,7 @@ struct CanonicalizeEntryPointIO::State {
             auto* builtin = ast::GetAttribute<ast::BuiltinAttribute>(attributes);
             if (cfg.shader_style == ShaderStyle::kGlsl && builtin) {
                 name = GLSLBuiltinToString(builtin->builtin, func_ast->PipelineStage(),
-                                           ast::StorageClass::kInput);
+                                           ast::StorageClass::kIn);
             }
             auto symbol = ctx.dst->Symbols().New(name);
 
@@ -198,7 +198,7 @@ struct CanonicalizeEntryPointIO::State {
                     value = ctx.dst->IndexAccessor(value, 0_i);
                 }
             }
-            ctx.dst->GlobalVar(symbol, ast_type, ast::StorageClass::kInput, std::move(attributes));
+            ctx.dst->GlobalVar(symbol, ast_type, ast::StorageClass::kIn, std::move(attributes));
             return value;
         } else if (cfg.shader_style == ShaderStyle::kMsl &&
                    ast::HasAttribute<ast::BuiltinAttribute>(attributes)) {
@@ -246,7 +246,7 @@ struct CanonicalizeEntryPointIO::State {
         if (cfg.shader_style == ShaderStyle::kGlsl) {
             if (auto* b = ast::GetAttribute<ast::BuiltinAttribute>(attributes)) {
                 name = GLSLBuiltinToString(b->builtin, func_ast->PipelineStage(),
-                                           ast::StorageClass::kOutput);
+                                           ast::StorageClass::kOut);
                 value = ToGLSLBuiltin(b->builtin, value, type);
             }
         }
@@ -463,7 +463,7 @@ struct CanonicalizeEntryPointIO::State {
                 type = ctx.dst->ty.array(type, 1_u);
                 lhs = ctx.dst->IndexAccessor(lhs, 0_i);
             }
-            ctx.dst->GlobalVar(name, type, ast::StorageClass::kOutput, std::move(attributes));
+            ctx.dst->GlobalVar(name, type, ast::StorageClass::kOut, std::move(attributes));
             wrapper_body.push_back(ctx.dst->Assign(lhs, outval.value));
         }
     }
@@ -640,7 +640,7 @@ struct CanonicalizeEntryPointIO::State {
             case ast::Builtin::kSampleIndex:
                 return "gl_SampleID";
             case ast::Builtin::kSampleMask:
-                if (storage_class == ast::StorageClass::kInput) {
+                if (storage_class == ast::StorageClass::kIn) {
                     return "gl_SampleMaskIn";
                 } else {
                     return "gl_SampleMask";

src/tint/utils/string.h

@@ -15,6 +15,7 @@
 #ifndef SRC_TINT_UTILS_STRING_H_
 #define SRC_TINT_UTILS_STRING_H_
 
+#include <sstream>
 #include <string>
 
 namespace tint::utils {
@@ -34,6 +35,15 @@ inline std::string ReplaceAll(std::string str,
     return str;
 }
 
+/// @param value the value to be printed as a string
+/// @returns value printed as a string via the std::ostream `<<` operator
+template <typename T>
+std::string ToString(const T& value) {
+    std::stringstream s;
+    s << value;
+    return s.str();
+}
+
 }  // namespace tint::utils
 
 #endif  // SRC_TINT_UTILS_STRING_H_

src/tint/utils/string_test.cc

@@ -32,5 +32,10 @@ TEST(StringTest, ReplaceAll) {
     ASSERT_EQ("aabxybbxybcc", ReplaceAll("aabbcc", "b", "bxyb"));
 }
 
+TEST(StringTest, ToString) {
+    ASSERT_EQ("123", ToString(123));
+    ASSERT_EQ("hello", ToString("hello"));
+}
+
 }  // namespace
 }  // namespace tint::utils

src/tint/writer/glsl/generator_impl.cc

@@ -1929,8 +1929,8 @@ bool GeneratorImpl::EmitGlobalVariable(const ast::Variable* global) {
                     return EmitPrivateVariable(sem);
                 case ast::StorageClass::kWorkgroup:
                     return EmitWorkgroupVariable(sem);
-                case ast::StorageClass::kInput:
+                case ast::StorageClass::kIn:
-                case ast::StorageClass::kOutput:
+                case ast::StorageClass::kOut:
                     return EmitIOVariable(sem);
                 default:
                     TINT_ICE(Writer, diagnostics_)
@@ -2738,11 +2738,11 @@ bool GeneratorImpl::EmitType(std::ostream& out,
         *name_printed = false;
     }
     switch (storage_class) {
-        case ast::StorageClass::kInput: {
+        case ast::StorageClass::kIn: {
             out << "in ";
             break;
         }
-        case ast::StorageClass::kOutput: {
+        case ast::StorageClass::kOut: {
             out << "out ";
             break;
         }

src/tint/writer/glsl/generator_impl_test.cc

@@ -62,7 +62,7 @@ TEST_F(GlslGeneratorImplTest, GenerateSampleIndexES) {
                   Builtin(ast::Builtin::kSampleIndex),
                   Disable(ast::DisabledValidation::kIgnoreStorageClass),
               },
-              ast::StorageClass::kInput);
+              ast::StorageClass::kIn);
     Func("my_func", {}, ty.i32(),
          {
              Return(Expr("gl_SampleID")),
@@ -87,7 +87,7 @@ TEST_F(GlslGeneratorImplTest, GenerateSampleIndexDesktop) {
                   Builtin(ast::Builtin::kSampleIndex),
                   Disable(ast::DisabledValidation::kIgnoreStorageClass),
               },
-              ast::StorageClass::kInput);
+              ast::StorageClass::kIn);
     Func("my_func", {}, ty.i32(),
          {
              Return(Expr("gl_SampleID")),

src/tint/writer/spirv/builder.cc

@@ -477,8 +477,8 @@ bool Builder::GenerateEntryPoint(const ast::Function* func, uint32_t id) {
     for (const auto* var : func_sem->TransitivelyReferencedGlobals()) {
         // For SPIR-V 1.3 we only output Input/output variables. If we update to
         // SPIR-V 1.4 or later this should be all variables.
-        if (var->StorageClass() != ast::StorageClass::kInput &&
+        if (var->StorageClass() != ast::StorageClass::kIn &&
-            var->StorageClass() != ast::StorageClass::kOutput) {
+            var->StorageClass() != ast::StorageClass::kOut) {
             continue;
         }
 
@@ -856,7 +856,7 @@ bool Builder::GenerateGlobalVariable(const ast::Variable* v) {
             // VK_KHR_zero_initialize_workgroup_memory extension is enabled, we should
             // also zero-initialize.
             if (sem->StorageClass() == ast::StorageClass::kPrivate ||
-                sem->StorageClass() == ast::StorageClass::kOutput ||
+                sem->StorageClass() == ast::StorageClass::kOut ||
                 (zero_initialize_workgroup_memory_ &&
                  sem->StorageClass() == ast::StorageClass::kWorkgroup)) {
                 init_id = GenerateConstantNullIfNeeded(type);
@@ -4113,9 +4113,9 @@ SpvStorageClass Builder::ConvertStorageClass(ast::StorageClass klass) const {
     switch (klass) {
         case ast::StorageClass::kInvalid:
             return SpvStorageClassMax;
-        case ast::StorageClass::kInput:
+        case ast::StorageClass::kIn:
             return SpvStorageClassInput;
-        case ast::StorageClass::kOutput:
+        case ast::StorageClass::kOut:
             return SpvStorageClassOutput;
         case ast::StorageClass::kUniform:
             return SpvStorageClassUniform;
@@ -4138,9 +4138,9 @@ SpvStorageClass Builder::ConvertStorageClass(ast::StorageClass klass) const {
 SpvBuiltIn Builder::ConvertBuiltin(ast::Builtin builtin, ast::StorageClass storage) {
     switch (builtin) {
         case ast::Builtin::kPosition:
-            if (storage == ast::StorageClass::kInput) {
+            if (storage == ast::StorageClass::kIn) {
                 return SpvBuiltInFragCoord;
-            } else if (storage == ast::StorageClass::kOutput) {
+            } else if (storage == ast::StorageClass::kOut) {
                 return SpvBuiltInPosition;
             } else {
                 TINT_ICE(Writer, builder_.Diagnostics()) << "invalid storage class for builtin";

src/tint/writer/spirv/builder_global_variable_test.cc

@@ -443,29 +443,27 @@ INSTANTIATE_TEST_SUITE_P(
     BuiltinDataTest,
     testing::Values(
         BuiltinData{ast::Builtin::kNone, ast::StorageClass::kNone, SpvBuiltInMax},
-        BuiltinData{ast::Builtin::kPosition, ast::StorageClass::kInput, SpvBuiltInFragCoord},
+        BuiltinData{ast::Builtin::kPosition, ast::StorageClass::kIn, SpvBuiltInFragCoord},
-        BuiltinData{ast::Builtin::kPosition, ast::StorageClass::kOutput, SpvBuiltInPosition},
+        BuiltinData{ast::Builtin::kPosition, ast::StorageClass::kOut, SpvBuiltInPosition},
         BuiltinData{
             ast::Builtin::kVertexIndex,
-            ast::StorageClass::kInput,
+            ast::StorageClass::kIn,
             SpvBuiltInVertexIndex,
         },
-        BuiltinData{ast::Builtin::kInstanceIndex, ast::StorageClass::kInput,
+        BuiltinData{ast::Builtin::kInstanceIndex, ast::StorageClass::kIn, SpvBuiltInInstanceIndex},
-                    SpvBuiltInInstanceIndex},
+        BuiltinData{ast::Builtin::kFrontFacing, ast::StorageClass::kIn, SpvBuiltInFrontFacing},
-        BuiltinData{ast::Builtin::kFrontFacing, ast::StorageClass::kInput, SpvBuiltInFrontFacing},
+        BuiltinData{ast::Builtin::kFragDepth, ast::StorageClass::kOut, SpvBuiltInFragDepth},
-        BuiltinData{ast::Builtin::kFragDepth, ast::StorageClass::kOutput, SpvBuiltInFragDepth},
+        BuiltinData{ast::Builtin::kLocalInvocationId, ast::StorageClass::kIn,
-        BuiltinData{ast::Builtin::kLocalInvocationId, ast::StorageClass::kInput,
                     SpvBuiltInLocalInvocationId},
-        BuiltinData{ast::Builtin::kLocalInvocationIndex, ast::StorageClass::kInput,
+        BuiltinData{ast::Builtin::kLocalInvocationIndex, ast::StorageClass::kIn,
                     SpvBuiltInLocalInvocationIndex},
-        BuiltinData{ast::Builtin::kGlobalInvocationId, ast::StorageClass::kInput,
+        BuiltinData{ast::Builtin::kGlobalInvocationId, ast::StorageClass::kIn,
                     SpvBuiltInGlobalInvocationId},
-        BuiltinData{ast::Builtin::kWorkgroupId, ast::StorageClass::kInput, SpvBuiltInWorkgroupId},
+        BuiltinData{ast::Builtin::kWorkgroupId, ast::StorageClass::kIn, SpvBuiltInWorkgroupId},
-        BuiltinData{ast::Builtin::kNumWorkgroups, ast::StorageClass::kInput,
+        BuiltinData{ast::Builtin::kNumWorkgroups, ast::StorageClass::kIn, SpvBuiltInNumWorkgroups},
-                    SpvBuiltInNumWorkgroups},
+        BuiltinData{ast::Builtin::kSampleIndex, ast::StorageClass::kIn, SpvBuiltInSampleId},
-        BuiltinData{ast::Builtin::kSampleIndex, ast::StorageClass::kInput, SpvBuiltInSampleId},
+        BuiltinData{ast::Builtin::kSampleMask, ast::StorageClass::kIn, SpvBuiltInSampleMask},
-        BuiltinData{ast::Builtin::kSampleMask, ast::StorageClass::kInput, SpvBuiltInSampleMask},
+        BuiltinData{ast::Builtin::kSampleMask, ast::StorageClass::kOut, SpvBuiltInSampleMask}));
-        BuiltinData{ast::Builtin::kSampleMask, ast::StorageClass::kOutput, SpvBuiltInSampleMask}));
 
 TEST_F(BuilderTest, GlobalVar_DeclReadOnly) {
     // struct A {

src/tint/writer/spirv/builder_type_test.cc

@@ -299,7 +299,7 @@ TEST_F(BuilderTest_Type, ReturnsGeneratedF16Matrix) {
 
 TEST_F(BuilderTest_Type, GeneratePtr) {
     auto* i32 = create<sem::I32>();
-    auto* ptr = create<sem::Pointer>(i32, ast::StorageClass::kOutput, ast::Access::kReadWrite);
+    auto* ptr = create<sem::Pointer>(i32, ast::StorageClass::kOut, ast::Access::kReadWrite);
 
     spirv::Builder& b = Build();
 
@@ -314,7 +314,7 @@ TEST_F(BuilderTest_Type, GeneratePtr) {
 
 TEST_F(BuilderTest_Type, ReturnsGeneratedPtr) {
     auto* i32 = create<sem::I32>();
-    auto* ptr = create<sem::Pointer>(i32, ast::StorageClass::kOutput, ast::Access::kReadWrite);
+    auto* ptr = create<sem::Pointer>(i32, ast::StorageClass::kOut, ast::Access::kReadWrite);
 
     spirv::Builder& b = Build();
 
@@ -601,8 +601,8 @@ INSTANTIATE_TEST_SUITE_P(
     BuilderTest_Type,
     PtrDataTest,
     testing::Values(PtrData{ast::StorageClass::kNone, SpvStorageClassMax},
-                    PtrData{ast::StorageClass::kInput, SpvStorageClassInput},
+                    PtrData{ast::StorageClass::kIn, SpvStorageClassInput},
-                    PtrData{ast::StorageClass::kOutput, SpvStorageClassOutput},
+                    PtrData{ast::StorageClass::kOut, SpvStorageClassOutput},
                     PtrData{ast::StorageClass::kUniform, SpvStorageClassUniform},
                     PtrData{ast::StorageClass::kWorkgroup, SpvStorageClassWorkgroup},
                     PtrData{ast::StorageClass::kHandle, SpvStorageClassUniformConstant},

test/tint/bug/tint/1046.wgsl

@@ -16,7 +16,7 @@ struct PointLight {
 };
 
 @binding(0) @group(0) var<uniform> uniforms : Uniforms;
-@binding(1) @group(0) var<storage_buffer, read> pointLights : PointLights;
+@binding(1) @group(0) var<storage, read> pointLights : PointLights;
 @binding(2) @group(0) var mySampler: sampler;
 @binding(3) @group(0) var myTexture: texture_2d<f32>;
 

test/tint/bug/tint/534.wgsl

@@ -9,7 +9,7 @@
 };
 @group(0) @binding(0) var src : texture_2d<f32>;
 @group(0) @binding(1) var dst : texture_2d<f32>;
-@group(0) @binding(2) var<storage_buffer, read_write> output : OutputBuf;
+@group(0) @binding(2) var<storage, read_write> output : OutputBuf;
 @group(0) @binding(3) var<uniform> uniforms : Uniforms;
 //@builtin(global_invocation_id) var<in> GlobalInvocationID : vec3<u32>;
 // Fp16 logic