[wasm] Generate source position information

src/compiler/pipeline.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_PIPELINE_H_
 #define V8_COMPILER_PIPELINE_H_
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 class CompilationInfo;
 class OptimizedCompileJob;
 class RegisterConfiguration;
 
 namespace compiler {
 
 class CallDescriptor;
 class Graph;
 class InstructionSequence;
 class Linkage;
 class PipelineData;
 class Schedule;
+class SourcePositionTable;
 
 class Pipeline {
  public:
   explicit Pipeline(CompilationInfo* info) : info_(info), data_(nullptr) {}
 
   // Run the entire pipeline and generate a handle to a code object.
   Handle<Code> GenerateCode();
 
+  // Run the pipeline on a machine graph, compute a new schedule and generate
+  // code.

[Michael Starzinger, 2016/04/22 11:30:21]

nit: We could even add "(specifically modeled for the WASM compiler)" to the
comment.

+  static Handle<Code> GenerateWASMCode(CompilationInfo* info,
+                                       CallDescriptor* call_descriptor,
+                                       Graph* graph,
+                                       SourcePositionTable* source_positions);
+
   // Run the pipeline on a machine graph and generate code. The {schedule} must
   // be valid, hence the given {graph} does not need to be schedulable.
   static Handle<Code> GenerateCodeForCodeStub(Isolate* isolate,
                                               CallDescriptor* call_descriptor,
                                               Graph* graph, Schedule* schedule,
                                               Code::Flags flags,
                                               const char* debug_name);
 
   // Run the pipeline on a machine graph and generate code. If {schedule} is
   // {nullptr}, then compute a new schedule for code generation.
@@ skipping 38 matching lines @@
   PipelineData* data_;
 
   DISALLOW_COPY_AND_ASSIGN(Pipeline);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_PIPELINE_H_