[wasm] Support for memory size relocation for asm-wasm.

Only Intel needed changes, arm and mips work as expected.

BUG=

Review-Url: https://codereview.chromium.org/2061833003
Cr-Commit-Position: refs/heads/master@{#37011}

src/ia32/macro-assembler-ia32.cc

@@ -2679,7 +2679,7 @@ void MacroAssembler::Move(Register dst, Register src) {
 
 
 void MacroAssembler::Move(Register dst, const Immediate& x) {
-  if (x.is_zero()) {
+  if (x.is_zero() && RelocInfo::IsNone(x.rmode_)) {
     xor_(dst, dst);  // Shorter than mov of 32-bit immediate 0.
   } else {
     mov(dst, x);

test/cctest/wasm/test-run-wasm-asmjs.cc

@@ -228,6 +228,9 @@ WASM_EXEC_TEST(StoreMemI32_oob_asm) {
     BUILD(r, WASM_UNOP(OP_TYPE, WASM_GET_LOCAL(0)));                          \
     CHECK_EQ(1, GetMatchingRelocInfoCount(module.instance->function_code[0],  \
                                           RelocInfo::WASM_MEMORY_REFERENCE)); \
+    CHECK_NE(                                                                 \
+        0, GetMatchingRelocInfoCount(module.instance->function_code[0],       \
+                                     RelocInfo::WASM_MEMORY_SIZE_REFERENCE)); \
   }
 
 FOREACH_INT_CHECKED_LOAD_OP(INT_LOAD_TEST)
@@ -240,6 +243,9 @@ FOREACH_INT_CHECKED_LOAD_OP(INT_LOAD_TEST)
     BUILD(r, WASM_BINOP(OP_TYPE, WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)));      \
     CHECK_EQ(1, GetMatchingRelocInfoCount(module.instance->function_code[0],  \
                                           RelocInfo::WASM_MEMORY_REFERENCE)); \
+    CHECK_NE(                                                                 \
+        0, GetMatchingRelocInfoCount(module.instance->function_code[0],       \
+                                     RelocInfo::WASM_MEMORY_SIZE_REFERENCE)); \
   }
 
 FOREACH_INT_CHECKED_STORE_OP(INT_STORE_TEST)
@@ -251,6 +257,8 @@ TEST(RunWasm_AsmCheckedLoadFloat32RelocInfo) {
 
   CHECK_EQ(1, GetMatchingRelocInfoCount(module.instance->function_code[0],
                                         RelocInfo::WASM_MEMORY_REFERENCE));
+  CHECK_NE(0, GetMatchingRelocInfoCount(module.instance->function_code[0],
+                                        RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
 }
 
 TEST(RunWasm_AsmCheckedStoreFloat32RelocInfo) {
@@ -261,6 +269,8 @@ TEST(RunWasm_AsmCheckedStoreFloat32RelocInfo) {
 
   CHECK_EQ(1, GetMatchingRelocInfoCount(module.instance->function_code[0],
                                         RelocInfo::WASM_MEMORY_REFERENCE));
+  CHECK_NE(0, GetMatchingRelocInfoCount(module.instance->function_code[0],
+                                        RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
 }
 
 TEST(RunWasm_AsmCheckedLoadFloat64RelocInfo) {
@@ -270,6 +280,8 @@ TEST(RunWasm_AsmCheckedLoadFloat64RelocInfo) {
 
   CHECK_EQ(1, GetMatchingRelocInfoCount(module.instance->function_code[0],
                                         RelocInfo::WASM_MEMORY_REFERENCE));
+  CHECK_NE(0, GetMatchingRelocInfoCount(module.instance->function_code[0],
+                                        RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
 }
 
 TEST(RunWasm_AsmCheckedStoreFloat64RelocInfo) {
@@ -280,4 +292,6 @@ TEST(RunWasm_AsmCheckedStoreFloat64RelocInfo) {
 
   CHECK_EQ(1, GetMatchingRelocInfoCount(module.instance->function_code[0],
                                         RelocInfo::WASM_MEMORY_REFERENCE));
+  CHECK_NE(0, GetMatchingRelocInfoCount(module.instance->function_code[0],
+                                        RelocInfo::WASM_MEMORY_SIZE_REFERENCE));
 }