[turbofan] Support subtraction displacements in BaseWithIndexAndDisplacementMatcher

src/compiler/instruction-selector-impl.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_
 #define V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_
 
 #include "src/compiler/instruction.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/linkage.h"
@@ skipping 125 matching lines @@
     } else {
       return ExplicitOperand(LocationOperand::STACK_SLOT, rep,
                              location.GetLocation());
     }
   }
 
   InstructionOperand UseImmediate(Node* node) {
     return sequence()->AddImmediate(ToConstant(node));
   }
 
+  InstructionOperand UseNegatedImmediate(Node* node) {
+    return sequence()->AddImmediate(ToNegatedConstant(node));
+  }
+
   InstructionOperand UseLocation(Node* node, LinkageLocation location) {
     return Use(node, ToUnallocatedOperand(location, GetVReg(node)));
   }
 
   // Used to force gap moves from the from_location to the to_location
   // immediately before an instruction.
   InstructionOperand UsePointerLocation(LinkageLocation to_location,
                                         LinkageLocation from_location) {
     UnallocatedOperand casted_from_operand =
         UnallocatedOperand::cast(TempLocation(from_location));
@@ skipping 62 matching lines @@
         return Constant(OpParameter<ExternalReference>(node));
       case IrOpcode::kHeapConstant:
         return Constant(OpParameter<Handle<HeapObject>>(node));
       default:
         break;
     }
     UNREACHABLE();
     return Constant(static_cast<int32_t>(0));
   }
 
+  static Constant ToNegatedConstant(const Node* node) {
+    switch (node->opcode()) {
+      case IrOpcode::kInt32Constant:
+        return Constant(-OpParameter<int32_t>(node));
+      case IrOpcode::kInt64Constant:
+        return Constant(-OpParameter<int64_t>(node));
+      default:
+        break;
+    }
+    UNREACHABLE();
+    return Constant(static_cast<int32_t>(0));
+  }
+
   UnallocatedOperand Define(Node* node, UnallocatedOperand operand) {
     DCHECK_NOT_NULL(node);
     DCHECK_EQ(operand.virtual_register(), GetVReg(node));
     selector()->MarkAsDefined(node);
     return operand;
   }
 
   UnallocatedOperand Use(Node* node, UnallocatedOperand operand) {
     DCHECK_NOT_NULL(node);
     DCHECK_EQ(operand.virtual_register(), GetVReg(node));
@@ skipping 142 matching lines @@
                                  // or mode_ == kFlags_set.
   BasicBlock* true_block_;       // Only valid if mode_ == kFlags_branch.
   BasicBlock* false_block_;      // Only valid if mode_ == kFlags_branch.
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_