[Atomics] Make Atomics.store a builtin using TF

src/compiler/ia32/code-generator-ia32.cc

Index: src/compiler/ia32/code-generator-ia32.cc
diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index 5f0ad29c86975bce9124f1c350093c3bdd8601a5..3410e7b014fe4a4282de3bd6feec4d25e0451fc8 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -1280,6 +1280,24 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       break;
     }
+    case kIA32Xchgb: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchg_b(i.InputRegister(index), operand);
+      break;
+    }
+    case kIA32Xchgw: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchg_w(i.InputRegister(index), operand);
+      break;
+    }
+    case kIA32Xchgl: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchg(i.InputRegister(index), operand);
+      break;
+    }
     case kCheckedLoadInt8:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movsx_b);
       break;
@@ -1331,6 +1349,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kAtomicLoadInt16:
     case kAtomicLoadUint16:
     case kAtomicLoadWord32:
+    case kAtomicStoreWord8:
+    case kAtomicStoreWord16:
+    case kAtomicStoreWord32:
       UNREACHABLE();  // Won't be generated by instruction selector.
       break;
   }