[wasm] Initial commit for the Int64Reducer.

test/cctest/wasm/wasm-run-utils.h

 // Copyright 2016 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 WASM_RUN_UTILS_H
 #define WASM_RUN_UTILS_H
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/base/utils/random-number-generator.h"
 
 #include "src/compiler/graph-visualizer.h"
+#include "src/compiler/int64-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/wasm-compiler.h"
 
 #include "src/wasm/ast-decoder.h"
 #include "src/wasm/wasm-js.h"
 #include "src/wasm/wasm-module.h"
 #include "src/wasm/wasm-opcodes.h"
 
 #include "test/cctest/cctest.h"
 #include "test/cctest/compiler/codegen-tester.h"
@@ skipping 204 matching lines @@
   TreeResult result = BuildTFGraph(&builder, env, start, end);
   if (result.failed()) {
     ptrdiff_t pc = result.error_pc - result.start;
     ptrdiff_t pt = result.error_pt - result.start;
     std::ostringstream str;
     str << "Verification failed: " << result.error_code << " pc = +" << pc;
     if (result.error_pt) str << ", pt = +" << pt;
     str << ", msg = " << result.error_msg.get();
     FATAL(str.str().c_str());
   }
+  builder.Int64LoweringForTesting();

[titzer, 2016/02/03 15:36:29]

This wasn't really what I meant with my earlier comment, but it's OK. You can
just inline this now. We can make it nicer in a later CL.

   if (FLAG_trace_turbo_graph) {
     OFStream os(stdout);
     os << AsRPO(*jsgraph->graph());
   }
 }
 
 
 // A helper for compiling functions that are only internally callable WASM code.
 class WasmFunctionCompiler : public HandleAndZoneScope,
                              private GraphAndBuilders {
@@ skipping 158 matching lines @@
     if (p1 == MachineType::None()) return 1;
     if (p2 == MachineType::None()) return 2;
     if (p3 == MachineType::None()) return 3;
     return 4;
   }
 };
 
 }  // namespace
 
 #endif