[turbofan] Reland of `Add alignment parameter to StackSlot operator`

test/unittests/compiler/int64-lowering-unittest.cc

Index: test/unittests/compiler/int64-lowering-unittest.cc
diff --git a/test/unittests/compiler/int64-lowering-unittest.cc b/test/unittests/compiler/int64-lowering-unittest.cc
index 2afeed6c00155ca5e079fe2d83f87f28e36e083b..5604b81ecd828f7fab422188847de076d7e0455b 100644
--- a/test/unittests/compiler/int64-lowering-unittest.cc
+++ b/test/unittests/compiler/int64-lowering-unittest.cc
@@ -603,7 +603,8 @@ TEST_F(Int64LoweringTest, F64ReinterpretI64) {
              MachineRepresentation::kFloat64);
 
   Capture<Node*> stack_slot_capture;
-  Matcher<Node*> stack_slot_matcher = IsStackSlot(sizeof(int64_t));
+  Matcher<Node*> stack_slot_matcher =
+      IsStackSlot(StackSlotRepresentation(sizeof(int64_t), 0));
 
   Capture<Node*> store_capture;
   Matcher<Node*> store_matcher =
@@ -634,7 +635,8 @@ TEST_F(Int64LoweringTest, I64ReinterpretF64) {
              MachineRepresentation::kWord64);
 
   Capture<Node*> stack_slot;
-  Matcher<Node*> stack_slot_matcher = IsStackSlot(sizeof(int64_t));
+  Matcher<Node*> stack_slot_matcher =
+      IsStackSlot(StackSlotRepresentation(sizeof(int64_t), 0));
 
   Capture<Node*> store;
   Matcher<Node*> store_matcher = IsStore(