[turbofan] Support subtraction displacements in BaseWithIndexAndDisplacementMatcher

src/compiler/instruction-selector-impl.h

Index: src/compiler/instruction-selector-impl.h
diff --git a/src/compiler/instruction-selector-impl.h b/src/compiler/instruction-selector-impl.h
index 616b6a53810cf02bbbd68f16b585e24c884edd5a..5e8680e1d8bf658d9b86552969dd0e449d4afb6f 100644
--- a/src/compiler/instruction-selector-impl.h
+++ b/src/compiler/instruction-selector-impl.h
@@ -143,6 +143,10 @@ class OperandGenerator {
     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)));
   }
@@ -225,6 +229,19 @@ class OperandGenerator {
     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));