[llvm] [NFC] Drop AArch64PostLegalizerCombiner dep on TargetPassConfig (PR #190569)

[Anshul Nigham via llvm-commits]

https://github.com/nigham created https://github.com/llvm/llvm-project/pull/190569

This will enable NewPM porting.

Replaced with the definition in
[AArch64PassConfig::getCSEConfig](https://github.com/llvm/llvm-project/blob/1d549d9a777a6faef6d425cb6482ab1fa6b91bb7/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp#L614)


>From d03a3a9354e24c4f11c446f13a0d8ed5a2776e0c Mon Sep 17 00:00:00 2001
From: Anshul Nigham <nigham at google.com>
Date: Sun, 5 Apr 2026 18:25:05 -0700
Subject: [PATCH] [NFC] Drop AArch64PostLegalizerCombiner dep on
 TargetPassConfig

---
 .../Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp  | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
index 631c09db7242e..59349db88289b 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
@@ -37,7 +37,6 @@
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
-#include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/Support/Debug.h"
 
 #define GET_GICOMBINER_DEPS
@@ -667,7 +666,6 @@ class AArch64PostLegalizerCombiner : public MachineFunctionPass {
 } // end anonymous namespace
 
 void AArch64PostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
-  AU.addRequired<TargetPassConfig>();
   AU.setPreservesCFG();
   getSelectionDAGFallbackAnalysisUsage(AU);
   AU.addRequired<GISelValueTrackingAnalysisLegacy>();
@@ -691,7 +689,6 @@ bool AArch64PostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
   if (MF.getProperties().hasFailedISel())
     return false;
   assert(MF.getProperties().hasLegalized() && "Expected a legalized function?");
-  auto *TPC = &getAnalysis<TargetPassConfig>();
   const Function &F = MF.getFunction();
   bool EnableOpt =
       MF.getTarget().getOptLevel() != CodeGenOptLevel::None && !skipFunction(F);
@@ -706,7 +703,8 @@ bool AArch64PostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
                 : &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
   GISelCSEAnalysisWrapper &Wrapper =
       getAnalysis<GISelCSEAnalysisWrapperPass>().getCSEWrapper();
-  auto *CSEInfo = &Wrapper.get(TPC->getCSEConfig());
+  auto *CSEInfo =
+      &Wrapper.get(getStandardCSEConfigForOpt(MF.getTarget().getOptLevel()));
 
   CombinerInfo CInfo(/*AllowIllegalOps*/ true, /*ShouldLegalizeIllegal*/ false,
                      /*LegalizerInfo*/ nullptr, EnableOpt, F.hasOptSize(),
@@ -914,7 +912,6 @@ char AArch64PostLegalizerCombiner::ID = 0;
 INITIALIZE_PASS_BEGIN(AArch64PostLegalizerCombiner, DEBUG_TYPE,
                       "Combine AArch64 MachineInstrs after legalization", false,
                       false)
-INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
 INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_END(AArch64PostLegalizerCombiner, DEBUG_TYPE,
                     "Combine AArch64 MachineInstrs after legalization", false,