Stub out the method to generate individual entry points.

This CL adds the stub methods for the various backends to generate
individual <pipeline stage, entry point> pairs.

Bug: tint:211
Change-Id: I7c5c6af4b44cb78976e4388a2b2174ee1a116531
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28044
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>

src/writer/hlsl/generator.cc

@@ -40,6 +40,10 @@ bool Generator::Generate() {
   return ret;
 }
 
+bool Generator::GenerateEntryPoint(ast::PipelineStage, const std::string&) {
+  return false;
+}
+
 std::string Generator::result() const {
   return out_.str();
 }

src/writer/hlsl/generator.h

@@ -41,6 +41,13 @@ class Generator : public Text {
   /// @returns true on successful generation; false otherwise
   bool Generate() override;
 
+  /// Converts a single entry point
+  /// @param stage the pipeline stage
+  /// @param name the entry point name
+  /// @returns true on succes; false on failure
+  bool GenerateEntryPoint(ast::PipelineStage stage,
+                          const std::string& name) override;
+
   /// @returns the result data
   std::string result() const override;
 

src/writer/msl/generator.cc

@@ -39,6 +39,10 @@ bool Generator::Generate() {
   return ret;
 }
 
+bool Generator::GenerateEntryPoint(ast::PipelineStage, const std::string&) {
+  return false;
+}
+
 std::string Generator::result() const {
   return impl_->result();
 }

src/writer/msl/generator.h

@@ -40,6 +40,13 @@ class Generator : public Text {
   /// @returns true on successful generation; false otherwise
   bool Generate() override;
 
+  /// Converts a single entry point
+  /// @param stage the pipeline stage
+  /// @param name the entry point name
+  /// @returns true on succes; false on failure
+  bool GenerateEntryPoint(ast::PipelineStage stage,
+                          const std::string& name) override;
+
   /// @returns the result data
   std::string result() const override;
 

src/writer/spirv/generator.cc

@@ -43,6 +43,10 @@ bool Generator::Generate() {
   return true;
 }
 
+bool Generator::GenerateEntryPoint(ast::PipelineStage, const std::string&) {
+  return false;
+}
+
 }  // namespace spirv
 }  // namespace writer
 }  // namespace tint

src/writer/spirv/generator.h

@@ -42,6 +42,13 @@ class Generator : public writer::Writer {
   /// @returns true on successful generation; false otherwise
   bool Generate() override;
 
+  /// Converts a single entry point
+  /// @param stage the pipeline stage
+  /// @param name the entry point name
+  /// @returns true on succes; false on failure
+  bool GenerateEntryPoint(ast::PipelineStage stage,
+                          const std::string& name) override;
+
   /// @returns the result data
   const std::vector<uint32_t>& result() const { return writer_->result(); }
 

src/writer/wgsl/generator.cc

@@ -38,6 +38,10 @@ bool Generator::Generate() {
   return ret;
 }
 
+bool Generator::GenerateEntryPoint(ast::PipelineStage, const std::string&) {
+  return false;
+}
+
 std::string Generator::result() const {
   return impl_->result();
 }

src/writer/wgsl/generator.h

@@ -40,6 +40,13 @@ class Generator : public Text {
   /// @returns true on successful generation; false otherwise
   bool Generate() override;
 
+  /// Converts a single entry point
+  /// @param stage the pipeline stage
+  /// @param name the entry point name
+  /// @returns true on succes; false on failure
+  bool GenerateEntryPoint(ast::PipelineStage stage,
+                          const std::string& name) override;
+
   /// @returns the result data
   std::string result() const override;
 

src/writer/writer.h

@@ -18,6 +18,7 @@
 #include <string>
 
 #include "src/ast/module.h"
+#include "src/ast/pipeline_stage.h"
 
 namespace tint {
 namespace writer {
@@ -37,6 +38,13 @@ class Writer {
   /// @returns true on success; false on failure
   virtual bool Generate() = 0;
 
+  /// Converts a single entry point
+  /// @param stage the pipeline stage
+  /// @param name the entry point name
+  /// @returns true on succes; false on failure
+  virtual bool GenerateEntryPoint(ast::PipelineStage stage,
+                                  const std::string& name) = 0;
+
  protected:
   /// Constructor
   /// @param module the tint module to convert