[wasm] Initial commit for the Int64Reducer.

src/compiler/wasm-compiler.cc

Index: src/compiler/wasm-compiler.cc
diff --git a/src/compiler/wasm-compiler.cc b/src/compiler/wasm-compiler.cc
index 395a8d4f168d6f7b5891c30c6659c8f6728e47cd..7269323f9e4cd91c3b7a9f6c43d704d7e446f422 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -531,9 +531,11 @@ Node* WasmGraphBuilder::Binop(wasm::WasmOpcode opcode, Node* left,
       op = m->Uint64Mod();
       return graph()->NewNode(op, left, right,
                               trap_->ZeroCheck64(kTrapRemByZero, right));
+#endif
     case wasm::kExprI64And:

[titzer, 2016/02/02 10:14:35]

Move this instead of adding more #ifdefs

[ahaas, 2016/02/02 13:32:48]

Done.

       op = m->Word64And();
       break;
+#if WASM_64
     case wasm::kExprI64Ior:
       op = m->Word64Or();
       break;
@@ -812,13 +814,12 @@ Node* WasmGraphBuilder::Unop(wasm::WasmOpcode opcode, Node* input) {
         break;
       }
     }
-
-#if WASM_64
-    // Opcodes only supported on 64-bit platforms.
-    // TODO(titzer): query the machine operator builder here instead of #ifdef.
     case wasm::kExprI32ConvertI64:
       op = m->TruncateInt64ToInt32();
       break;
+#if WASM_64
+    // Opcodes only supported on 64-bit platforms.
+    // TODO(titzer): query the machine operator builder here instead of #ifdef.
     case wasm::kExprI64SConvertI32:
       op = m->ChangeInt32ToInt64();
       break;
@@ -1873,7 +1874,6 @@ Node* WasmGraphBuilder::String(const char* string) {
 
 Graph* WasmGraphBuilder::graph() { return jsgraph()->graph(); }
 
-
 static void RecordFunctionCompilation(Logger::LogEventsAndTags tag,
                                       CompilationInfo* info,
                                       const char* message, uint32_t index,
@@ -1895,7 +1895,6 @@ static void RecordFunctionCompilation(Logger::LogEventsAndTags tag,
   }
 }
 
-
 Handle<JSFunction> CompileJSToWasmWrapper(
     Isolate* isolate, wasm::ModuleEnv* module, Handle<String> name,
     Handle<Code> wasm_code, Handle<JSObject> module_object, uint32_t index) {