Change generators to take a pointer instead of move.

This CL changes the generators so we don't have to move the module into
the generator. This will then allow calling the demangler at a later
point and still having access to the module.

Change-Id: Icad16ddb2b89921cbb174cf7fec520c410139285
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/36942
Reviewed-by: Ben Clayton <bclayton@google.com>

samples/main.cc

@@ -550,7 +550,7 @@ int main(int argc, const char** argv) {
 
 #if TINT_BUILD_SPV_WRITER
   if (options.format == Format::kSpirv || options.format == Format::kSpvAsm) {
-    writer = std::make_unique<tint::writer::spirv::Generator>(std::move(mod));
+    writer = std::make_unique<tint::writer::spirv::Generator>(&mod);
   }
 #endif  // TINT_BUILD_SPV_WRITER
 
@@ -562,13 +562,13 @@ int main(int argc, const char** argv) {
 
 #if TINT_BUILD_MSL_WRITER
   if (options.format == Format::kMsl) {
-    writer = std::make_unique<tint::writer::msl::Generator>(std::move(mod));
+    writer = std::make_unique<tint::writer::msl::Generator>(&mod);
   }
 #endif  // TINT_BUILD_MSL_WRITER
 
 #if TINT_BUILD_HLSL_WRITER
   if (options.format == Format::kHlsl) {
-    writer = std::make_unique<tint::writer::hlsl::Generator>(std::move(mod));
+    writer = std::make_unique<tint::writer::hlsl::Generator>(&mod);
   }
 #endif  // TINT_BUILD_HLSL_WRITER
 

src/ast/module_clone_test.cc

@@ -149,13 +149,13 @@ fn main() -> void {
   // reconstruct the WGSL.
   std::string src_wgsl;
   {
-    writer::wgsl::Generator src_gen(std::move(src));
+    writer::wgsl::Generator src_gen(&src);
     ASSERT_TRUE(src_gen.Generate());
     src_wgsl = src_gen.result();
   }
 
   // Print the dst module, check it matches the original source
-  writer::wgsl::Generator dst_gen(std::move(dst));
+  writer::wgsl::Generator dst_gen(&dst);
   ASSERT_TRUE(dst_gen.Generate());
   auto dst_wgsl = dst_gen.result();
   ASSERT_EQ(src_wgsl, dst_wgsl);

src/transform/test_helper.h

@@ -66,7 +66,7 @@ class TransformTest : public testing::Test {
     // Release the source module to ensure there's no uncloned data in result
     { auto tmp = std::move(module); }
 
-    writer::wgsl::Generator generator(std::move(result.module));
+    writer::wgsl::Generator generator(&(result.module));
     if (!generator.Generate()) {
       return "WGSL writer failed:\n" + generator.error();
     }

src/writer/hlsl/generator.cc

@@ -22,8 +22,13 @@ namespace hlsl {
 
 Generator::Generator(ast::Module module)
     : Text(std::move(module)),
-      namer_(std::make_unique<UnsafeNamer>(&module)),
-      impl_(std::make_unique<GeneratorImpl>(&module_, namer_.get())) {}
+      namer_(std::make_unique<UnsafeNamer>(module_)),
+      impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
+
+Generator::Generator(ast::Module* module)
+    : Text(module),
+      namer_(std::make_unique<UnsafeNamer>(module_)),
+      impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
 
 Generator::~Generator() = default;
 
@@ -31,7 +36,7 @@ void Generator::Reset() {
   set_error("");
   out_ = std::ostringstream();
   namer_->Reset();
-  impl_ = std::make_unique<GeneratorImpl>(&module_, namer_.get());
+  impl_ = std::make_unique<GeneratorImpl>(module_, namer_.get());
 }
 
 bool Generator::Generate() {

src/writer/hlsl/generator.h

@@ -31,8 +31,12 @@ namespace hlsl {
 class Generator : public Text {
  public:
   /// Constructor
+  /// DEPRECATED
   /// @param module the module to convert
   explicit Generator(ast::Module module);
+  /// Constructor
+  /// @param module the module to convert
+  explicit Generator(ast::Module* module);
   ~Generator() override;
 
   /// Resets the generator

src/writer/msl/generator.cc

@@ -22,15 +22,20 @@ namespace msl {
 
 Generator::Generator(ast::Module module)
     : Text(std::move(module)),
-      namer_(std::make_unique<UnsafeNamer>(&module_)),
-      impl_(std::make_unique<GeneratorImpl>(&module_, namer_.get())) {}
+      namer_(std::make_unique<UnsafeNamer>(module_)),
+      impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
+
+Generator::Generator(ast::Module* module)
+    : Text(module),
+      namer_(std::make_unique<UnsafeNamer>(module_)),
+      impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
 
 Generator::~Generator() = default;
 
 void Generator::Reset() {
   set_error("");
   namer_->Reset();
-  impl_ = std::make_unique<GeneratorImpl>(&module_, namer_.get());
+  impl_ = std::make_unique<GeneratorImpl>(module_, namer_.get());
 }
 
 bool Generator::Generate() {

src/writer/msl/generator.h

@@ -30,8 +30,12 @@ namespace msl {
 class Generator : public Text {
  public:
   /// Constructor
+  /// DEPRECATED
   /// @param module the module to convert
   explicit Generator(ast::Module module);
+  /// Constructor
+  /// @param module the module to convert
+  explicit Generator(ast::Module* module);
   ~Generator() override;
 
   /// Resets the generator

src/writer/spirv/generator.cc

@@ -22,15 +22,21 @@ namespace spirv {
 
 Generator::Generator(ast::Module module)
     : writer::Writer(std::move(module)),
-      namer_(std::make_unique<UnsafeNamer>(&module_)),
-      builder_(std::make_unique<Builder>(&module_, namer_.get())),
+      namer_(std::make_unique<UnsafeNamer>(module_)),
+      builder_(std::make_unique<Builder>(module_, namer_.get())),
+      writer_(std::make_unique<BinaryWriter>()) {}
+
+Generator::Generator(ast::Module* module)
+    : writer::Writer(module),
+      namer_(std::make_unique<UnsafeNamer>(module_)),
+      builder_(std::make_unique<Builder>(module_, namer_.get())),
       writer_(std::make_unique<BinaryWriter>()) {}
 
 Generator::~Generator() = default;
 
 void Generator::Reset() {
   namer_->Reset();
-  builder_ = std::make_unique<Builder>(&module_, namer_.get());
+  builder_ = std::make_unique<Builder>(module_, namer_.get());
   writer_ = std::make_unique<BinaryWriter>();
 }
 

src/writer/spirv/generator.h

@@ -33,8 +33,12 @@ namespace spirv {
 class Generator : public writer::Writer {
  public:
   /// Constructor
+  /// DEPRECATED
   /// @param module the module to convert
   explicit Generator(ast::Module module);
+  /// Constructor
+  /// @param module the module to convert
+  explicit Generator(ast::Module* module);
   ~Generator() override;
 
   /// Resets the generator

src/writer/text.cc

@@ -21,6 +21,8 @@ namespace writer {
 
 Text::Text(ast::Module module) : Writer(std::move(module)) {}
 
+Text::Text(ast::Module* module) : Writer(module) {}
+
 Text::~Text() = default;
 
 }  // namespace writer

src/writer/text.h

@@ -28,6 +28,9 @@ class Text : public Writer {
   /// Constructor
   /// @param module the module to convert
   explicit Text(ast::Module module);
+  /// Constructor
+  /// @param module the module to convert
+  explicit Text(ast::Module* module);
   ~Text() override;
 
   /// @returns the result data

src/writer/wgsl/generator.cc

@@ -22,13 +22,16 @@ namespace wgsl {
 
 Generator::Generator(ast::Module module)
     : Text(std::move(module)),
-      impl_(std::make_unique<GeneratorImpl>(&module_)) {}
+      impl_(std::make_unique<GeneratorImpl>(module_)) {}
+
+Generator::Generator(ast::Module* module)
+    : Text(module), impl_(std::make_unique<GeneratorImpl>(module_)) {}
 
 Generator::~Generator() = default;
 
 void Generator::Reset() {
   set_error("");
-  impl_ = std::make_unique<GeneratorImpl>(&module_);
+  impl_ = std::make_unique<GeneratorImpl>(module_);
 }
 
 bool Generator::Generate() {

src/writer/wgsl/generator.h

@@ -29,8 +29,12 @@ namespace wgsl {
 class Generator : public Text {
  public:
   /// Constructor
+  /// DEPRECATED
   /// @param module the module to convert
   explicit Generator(ast::Module module);
+  /// Constructor
+  /// @param module the module to convert
+  explicit Generator(ast::Module* module);
   ~Generator() override;
 
   /// Resets the generator

src/writer/writer.cc

@@ -19,7 +19,10 @@
 namespace tint {
 namespace writer {
 
-Writer::Writer(ast::Module module) : module_(std::move(module)) {}
+Writer::Writer(ast::Module module)
+    : owned_module_(std::move(module)), module_(&owned_module_) {}
+
+Writer::Writer(ast::Module* module) : module_(module) {}
 
 Writer::~Writer() = default;
 

src/writer/writer.h

@@ -51,6 +51,9 @@ class Writer {
   /// Constructor
   /// @param module the tint module to convert
   explicit Writer(ast::Module module);
+  /// Constructor
+  /// @param module the tint module to convert
+  explicit Writer(ast::Module* module);
 
   /// Sets the error string
   /// @param msg the error message
@@ -58,8 +61,11 @@ class Writer {
 
   /// An error message, if an error was encountered
   std::string error_;
+
+  /// Temporary owned module until we can update the API ...
+  ast::Module owned_module_;
   /// The module being converted
-  ast::Module module_;
+  ast::Module* module_;
 };
 
 }  // namespace writer