[llvm] [AMDGPU] Pre-commit unit test for RP tracking `reset`/`advance` inconsistencies fix (PR #196098)

[Lucas Ramirez via llvm-commits]

================
@@ -0,0 +1,195 @@
+//===- GCNRegPressureTest.cpp ---------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "GCNRegPressure.h"
+#include "AMDGPUTargetMachine.h"
+#include "AMDGPUUnitTests.h"
+#include "llvm/Analysis/CGSCCPassManager.h"
+#include "llvm/Analysis/LoopAnalysisManager.h"
+#include "llvm/CodeGen/LiveIntervals.h"
+#include "llvm/CodeGen/MIRParser/MIRParser.h"
+#include "llvm/CodeGen/MachineFunctionAnalysis.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachinePassManager.h"
+#include "llvm/CodeGen/MachineScheduler.h"
+#include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/CodeGen/TargetLowering.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Passes/PassBuilder.h"
+#include "llvm/Target/TargetMachine.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+class GCNRegPressureTest : public testing::Test {
----------------
lucas-rami wrote:

I didn't find any so made one base class for codegen tests in #196547. 

https://github.com/llvm/llvm-project/pull/196098