Simplify constant pool usage in x64 code generator (by removing extra argument

runtime/vm/assembler_x64_test.cc

Index: runtime/vm/assembler_x64_test.cc
diff --git a/runtime/vm/assembler_x64_test.cc b/runtime/vm/assembler_x64_test.cc
index a10b52eeca8b1f11163cd174ad3a59a8479ac5bd..f7ecb530fc73df3b3b5196d96209c30fae99ea41 100644
--- a/runtime/vm/assembler_x64_test.cc
+++ b/runtime/vm/assembler_x64_test.cc
@@ -2659,7 +2659,7 @@ ASSEMBLER_TEST_GENERATE(PackedLogicalNot, assembler) {
       { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   __ pushq(PP);  // Save caller's pool pointer and load a new one here.
   __ LoadPoolPointer(PP);
-  __ LoadImmediate(RAX, Immediate(reinterpret_cast<intptr_t>(&constant1)), PP);
+  __ LoadImmediate(RAX, Immediate(reinterpret_cast<intptr_t>(&constant1)));
   __ movups(XMM9, Address(RAX, 0));
   __ notps(XMM9);
   __ movaps(XMM0, XMM9);
@@ -3068,25 +3068,25 @@ ASSEMBLER_TEST_GENERATE(TestObjectCompare, assembler) {
   __ EnterFrame(0);
   __ pushq(PP);  // Save caller's pool pointer and load a new one here.
   __ LoadPoolPointer(PP);
-  __ LoadObject(RAX, obj, PP);
-  __ CompareObject(RAX, obj, PP);
+  __ LoadObject(RAX, obj);
+  __ CompareObject(RAX, obj);
   __ j(NOT_EQUAL, &fail);
-  __ LoadObject(RCX, obj, PP);
-  __ CompareObject(RCX, obj, PP);
+  __ LoadObject(RCX, obj);
+  __ CompareObject(RCX, obj);
   __ j(NOT_EQUAL, &fail);
   const Smi& smi = Smi::ZoneHandle(Smi::New(15));
-  __ LoadObject(RCX, smi, PP);
-  __ CompareObject(RCX, smi, PP);
+  __ LoadObject(RCX, smi);
+  __ CompareObject(RCX, smi);
   __ j(NOT_EQUAL, &fail);
   __ pushq(RAX);
-  __ StoreObject(Address(RSP, 0), obj, PP);
+  __ StoreObject(Address(RSP, 0), obj);
   __ popq(RCX);
-  __ CompareObject(RCX, obj, PP);
+  __ CompareObject(RCX, obj);
   __ j(NOT_EQUAL, &fail);
   __ pushq(RAX);
-  __ StoreObject(Address(RSP, 0), smi, PP);
+  __ StoreObject(Address(RSP, 0), smi);
   __ popq(RCX);
-  __ CompareObject(RCX, smi, PP);
+  __ CompareObject(RCX, smi);
   __ j(NOT_EQUAL, &fail);
   __ movl(RAX, Immediate(1));  // OK
   __ popq(PP);  // Restore caller's pool pointer.