X87: [wasm] Prerequisites for WebAssembly Table.Grow.

  port 0c4b8ff4 (r42192)

  original commit message:
   - Refactor Dispatch tables to have separate function, signature tables
   - New Relocation type for WasmFunctionTableReference, assembler, compiler support.
   - RelocInfo helper functions for Wasm references

BUG=

Review-Url: https://codereview.chromium.org/2623133002
Cr-Commit-Position: refs/heads/master@{#42208}

src/compiler/x87/code-generator-x87.cc

@@ -60,9 +60,7 @@ class X87OperandConverter : public InstructionOperandConverter {
   Immediate ToImmediate(InstructionOperand* operand) {
     Constant constant = ToConstant(operand);
     if (constant.type() == Constant::kInt32 &&
-        (constant.rmode() == RelocInfo::WASM_MEMORY_REFERENCE ||
-         constant.rmode() == RelocInfo::WASM_GLOBAL_REFERENCE ||
-         constant.rmode() == RelocInfo::WASM_MEMORY_SIZE_REFERENCE)) {
+        RelocInfo::IsWasmReference(constant.rmode())) {
       return Immediate(reinterpret_cast<Address>(constant.ToInt32()),
                        constant.rmode());
     }

src/x87/assembler-x87.cc

@@ -116,13 +116,18 @@ uint32_t RelocInfo::wasm_memory_size_reference() {
   return Memory::uint32_at(pc_);
 }
 
+uint32_t RelocInfo::wasm_function_table_size_reference() {
+  DCHECK(IsWasmFunctionTableSizeReference(rmode_));
+  return Memory::uint32_at(pc_);
+}
+
 void RelocInfo::unchecked_update_wasm_memory_reference(
     Address address, ICacheFlushMode flush_mode) {
   Memory::Address_at(pc_) = address;
 }
 
-void RelocInfo::unchecked_update_wasm_memory_size(uint32_t size,
-                                                  ICacheFlushMode flush_mode) {
+void RelocInfo::unchecked_update_wasm_size(uint32_t size,
+                                           ICacheFlushMode flush_mode) {
   Memory::uint32_at(pc_) = size;
 }