[wasm] Add support for import section.

test/unittests/wasm/wasm-macro-gen-unittest.cc

 // Copyright 2015 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.
 
 #include "test/unittests/test-utils.h"
 
 #include "src/wasm/wasm-macro-gen.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 113 matching lines @@
 
   EXPECT_SIZE(4, WASM_BLOCK(1, WASM_ZERO));
   EXPECT_SIZE(5, WASM_BLOCK(2, WASM_NOP, WASM_ZERO));
   EXPECT_SIZE(6, WASM_BLOCK(3, WASM_NOP, WASM_NOP, WASM_ZERO));
 
   EXPECT_SIZE(4, WASM_LOOP(1, WASM_ZERO));
   EXPECT_SIZE(5, WASM_LOOP(2, WASM_NOP, WASM_ZERO));
   EXPECT_SIZE(6, WASM_LOOP(3, WASM_NOP, WASM_NOP, WASM_ZERO));
 }
 
-
-TEST_F(WasmMacroGenTest, FunctionCalls) {
+TEST_F(WasmMacroGenTest, CallFunction) {
   EXPECT_SIZE(2, WASM_CALL_FUNCTION0(0));
   EXPECT_SIZE(2, WASM_CALL_FUNCTION0(1));
   EXPECT_SIZE(2, WASM_CALL_FUNCTION0(11));
 
   EXPECT_SIZE(4, WASM_CALL_FUNCTION(0, WASM_ZERO));
   EXPECT_SIZE(6, WASM_CALL_FUNCTION(1, WASM_ZERO, WASM_ZERO));
+}
 
+TEST_F(WasmMacroGenTest, CallImport) {
+  EXPECT_SIZE(2, WASM_CALL_IMPORT0(0));
+  EXPECT_SIZE(2, WASM_CALL_IMPORT0(1));
+  EXPECT_SIZE(2, WASM_CALL_IMPORT0(11));
+
+  EXPECT_SIZE(4, WASM_CALL_IMPORT(0, WASM_ZERO));
+  EXPECT_SIZE(6, WASM_CALL_IMPORT(1, WASM_ZERO, WASM_ZERO));
+}
+
+TEST_F(WasmMacroGenTest, CallIndirect) {
   EXPECT_SIZE(4, WASM_CALL_INDIRECT0(0, WASM_ZERO));
   EXPECT_SIZE(4, WASM_CALL_INDIRECT0(1, WASM_ZERO));
   EXPECT_SIZE(4, WASM_CALL_INDIRECT0(11, WASM_ZERO));
 
   EXPECT_SIZE(6, WASM_CALL_INDIRECT(0, WASM_ZERO, WASM_ZERO));
   EXPECT_SIZE(8, WASM_CALL_INDIRECT(1, WASM_ZERO, WASM_ZERO, WASM_ZERO));
 }
 
 
 TEST_F(WasmMacroGenTest, Int32Ops) {
@@ skipping 157 matching lines @@
     EXPECT_SIZE(5, WASM_LOAD_MEM_OFFSET(kMemTypes[i], 11, WASM_ZERO));
   }
   for (size_t i = 0; i < arraysize(kMemTypes); i++) {
     EXPECT_SIZE(7, WASM_STORE_MEM_OFFSET(kMemTypes[i], 13, WASM_ZERO,
                                          WASM_GET_LOCAL(0)));
   }
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8