[turbofan] Poison according to NeedsPoisoning return value

Previously we were also taking into account the machine type

Change-Id: Ic76aad578f00ef24cf17b349d94cdade8f9ee29d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733072Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63044}

src/compiler/memory-optimizer.cc

@@ -567,9 +567,7 @@ void MemoryOptimizer::VisitLoadElement(Node* node,
   Node* index = node->InputAt(1);
   node->ReplaceInput(1, ComputeIndex(access, index));
   MachineType type = access.machine_type;
-  if (NeedsPoisoning(access.load_sensitivity) &&
-      type.representation() != MachineRepresentation::kTaggedPointer &&
-      type.representation() != MachineRepresentation::kCompressedPointer) {
+  if (NeedsPoisoning(access.load_sensitivity)) {
     NodeProperties::ChangeOp(node, machine()->PoisonedLoad(type));
   } else {
     NodeProperties::ChangeOp(node, machine()->Load(type));
@@ -583,9 +581,7 @@ void MemoryOptimizer::VisitLoadField(Node* node, AllocationState const* state) {
   Node* offset = jsgraph()->IntPtrConstant(access.offset - access.tag());
   node->InsertInput(graph()->zone(), 1, offset);
   MachineType type = access.machine_type;
-  if (NeedsPoisoning(access.load_sensitivity) &&
-      type.representation() != MachineRepresentation::kTaggedPointer &&
-      type.representation() != MachineRepresentation::kCompressedPointer) {
+  if (NeedsPoisoning(access.load_sensitivity)) {
     NodeProperties::ChangeOp(node, machine()->PoisonedLoad(type));
   } else {
     NodeProperties::ChangeOp(node, machine()->Load(type));