llvm · davemgreen · May 14, 2025 · May 13, 2025 · May 13, 2025 · May 13, 2025
diff --git a/llvm/docs/GlobalISel/KnownBits.rst b/llvm/docs/GlobalISel/KnownBits.rst
@@ -66,18 +66,18 @@ dependency with ``INITIALIZE_PASS_DEPENDENCY``.
  ...

  INITIALIZE_PASS_BEGIN(...)
-  INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+  INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
  INITIALIZE_PASS_END(...)

 and require the pass in ``getAnalysisUsage``.

 .. code-block:: c++

  void MyPass::getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.addRequired<GISelValueTrackingAnalysis>();
+    AU.addRequired<GISelValueTrackingAnalysisLegacy>();
    // Optional: If your pass preserves known bits analysis (many do) then
    //           indicate that it's preserved for re-use by another pass here.
-    AU.addPreserved<GISelValueTrackingAnalysis>();
+    AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
  }

 Then it's just a matter of fetching the analysis and using it:
@@ -86,7 +86,7 @@ Then it's just a matter of fetching the analysis and using it:

  bool MyPass::runOnMachineFunction(MachineFunction &MF) {
    ...
-    GISelValueTracking &VT = getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+    GISelValueTracking &VT = getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
    ...
    MachineInstr *MI = ...;
    KnownBits Known = VT->getKnownBits(MI->getOperand(0).getReg());

diff --git a/llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h b/llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h
@@ -18,6 +18,7 @@
 #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/Register.h"
+#include "llvm/IR/PassManager.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Support/KnownBits.h"

@@ -104,19 +105,42 @@ class GISelValueTracking : public GISelChangeObserver {
 /// Eventually add other features such as caching/ser/deserializing
 /// to MIR etc. Those implementations can derive from GISelValueTracking
 /// and override computeKnownBitsImpl.
-class GISelValueTrackingAnalysis : public MachineFunctionPass {
+class GISelValueTrackingAnalysisLegacy : public MachineFunctionPass {
  std::unique_ptr<GISelValueTracking> Info;

 public:
  static char ID;
-  GISelValueTrackingAnalysis() : MachineFunctionPass(ID) {
-    initializeGISelValueTrackingAnalysisPass(*PassRegistry::getPassRegistry());
+  GISelValueTrackingAnalysisLegacy() : MachineFunctionPass(ID) {
+    initializeGISelValueTrackingAnalysisLegacyPass(
+        *PassRegistry::getPassRegistry());
  }
  GISelValueTracking &get(MachineFunction &MF);
  void getAnalysisUsage(AnalysisUsage &AU) const override;
  bool runOnMachineFunction(MachineFunction &MF) override;
  void releaseMemory() override { Info.reset(); }
 };
+
+class GISelValueTrackingAnalysis
+    : public AnalysisInfoMixin<GISelValueTrackingAnalysis> {
+  friend AnalysisInfoMixin<GISelValueTrackingAnalysis>;
+  static AnalysisKey Key;
+
+public:
+  using Result = GISelValueTracking;
+
+  Result run(MachineFunction &MF, MachineFunctionAnalysisManager &MFAM);
+};
+
+class GISelValueTrackingPrinterPass
+    : public PassInfoMixin<GISelValueTrackingPrinterPass> {
+  raw_ostream &OS;
+
+public:
+  GISelValueTrackingPrinterPass(raw_ostream &OS) : OS(OS) {}
+
+  PreservedAnalyses run(MachineFunction &MF,
+                        MachineFunctionAnalysisManager &MFAM);
+};
 } // namespace llvm

 #endif // LLVM_CODEGEN_GLOBALISEL_GISELVALUETRACKING_H
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
@@ -155,7 +155,7 @@ void initializeLazyValueInfoWrapperPassPass(PassRegistry &);
 void initializeLegacyLICMPassPass(PassRegistry &);
 void initializeLegalizerPass(PassRegistry &);
 void initializeGISelCSEAnalysisWrapperPassPass(PassRegistry &);
-void initializeGISelValueTrackingAnalysisPass(PassRegistry &);
+void initializeGISelValueTrackingAnalysisLegacyPass(PassRegistry &);
 void initializeLiveDebugValuesLegacyPass(PassRegistry &);
 void initializeLiveDebugVariablesWrapperLegacyPass(PassRegistry &);
 void initializeLiveIntervalsWrapperPassPass(PassRegistry &);

diff --git a/llvm/include/llvm/Passes/MachinePassRegistry.def b/llvm/include/llvm/Passes/MachinePassRegistry.def
@@ -98,6 +98,7 @@ LOOP_PASS("loop-term-fold", LoopTermFoldPass())
 // computed. (We still either need to regenerate kill flags after regalloc, or
 // preferably fix the scavenger to not depend on them).
 MACHINE_FUNCTION_ANALYSIS("edge-bundles", EdgeBundlesAnalysis())
+MACHINE_FUNCTION_ANALYSIS("gisel-value-tracking", GISelValueTrackingAnalysis())
 MACHINE_FUNCTION_ANALYSIS("livedebugvars", LiveDebugVariablesAnalysis())
 MACHINE_FUNCTION_ANALYSIS("live-intervals", LiveIntervalsAnalysis())
 MACHINE_FUNCTION_ANALYSIS("live-reg-matrix", LiveRegMatrixAnalysis())
@@ -165,6 +166,7 @@ MACHINE_FUNCTION_PASS("post-RA-sched", PostRASchedulerPass(TM))
 MACHINE_FUNCTION_PASS("postmisched", PostMachineSchedulerPass(TM))
 MACHINE_FUNCTION_PASS("post-ra-pseudos", ExpandPostRAPseudosPass())
 MACHINE_FUNCTION_PASS("print", PrintMIRPass())
+MACHINE_FUNCTION_PASS("print<gisel-value-tracking>", GISelValueTrackingPrinterPass(errs()))
 MACHINE_FUNCTION_PASS("print<livedebugvars>", LiveDebugVariablesPrinterPass(errs()))
 MACHINE_FUNCTION_PASS("print<live-intervals>", LiveIntervalsPrinterPass(errs()))
 MACHINE_FUNCTION_PASS("print<live-stacks>", LiveStacksPrinterPass(errs()))

diff --git a/llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp b/llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
@@ -27,9 +27,9 @@

 using namespace llvm;

-char llvm::GISelValueTrackingAnalysis::ID = 0;
+char llvm::GISelValueTrackingAnalysisLegacy::ID = 0;

-INITIALIZE_PASS(GISelValueTrackingAnalysis, DEBUG_TYPE,
+INITIALIZE_PASS(GISelValueTrackingAnalysisLegacy, DEBUG_TYPE,
                "Analysis for ComputingKnownBits", false, true)

 GISelValueTracking::GISelValueTracking(MachineFunction &MF, unsigned MaxDepth)
@@ -893,20 +893,57 @@ unsigned GISelValueTracking::computeNumSignBits(Register R, unsigned Depth) {
  return computeNumSignBits(R, DemandedElts, Depth);
 }

-void GISelValueTrackingAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
+void GISelValueTrackingAnalysisLegacy::getAnalysisUsage(
+    AnalysisUsage &AU) const {
  AU.setPreservesAll();
  MachineFunctionPass::getAnalysisUsage(AU);
 }

-bool GISelValueTrackingAnalysis::runOnMachineFunction(MachineFunction &MF) {
+bool GISelValueTrackingAnalysisLegacy::runOnMachineFunction(
+    MachineFunction &MF) {
  return false;
 }

-GISelValueTracking &GISelValueTrackingAnalysis::get(MachineFunction &MF) {
+GISelValueTracking &GISelValueTrackingAnalysisLegacy::get(MachineFunction &MF) {
  if (!Info) {
    unsigned MaxDepth =
        MF.getTarget().getOptLevel() == CodeGenOptLevel::None ? 2 : 6;
    Info = std::make_unique<GISelValueTracking>(MF, MaxDepth);
  }
  return *Info;
 }
+
+AnalysisKey GISelValueTrackingAnalysis::Key;
+
+GISelValueTracking
+GISelValueTrackingAnalysis::run(MachineFunction &MF,
+                                MachineFunctionAnalysisManager &MFAM) {
+  return Result(MF);
+}
+
+PreservedAnalyses
+GISelValueTrackingPrinterPass::run(MachineFunction &MF,
+                                   MachineFunctionAnalysisManager &MFAM) {
+  auto &VTA = MFAM.getResult<GISelValueTrackingAnalysis>(MF);
+  const auto &MRI = MF.getRegInfo();
+  OS << "name: ";
+  MF.getFunction().printAsOperand(OS, /*PrintType=*/false);
+  OS << '\n';
+
+  for (MachineBasicBlock &BB : MF) {
+    for (MachineInstr &MI : BB) {
+      for (MachineOperand &MO : MI.defs()) {
+        if (!MO.isReg() || MO.getReg().isPhysical())
+          continue;
+        Register Reg = MO.getReg();
+        if (!MRI.getType(Reg).isValid())
+          continue;
+        KnownBits Known = VTA.getKnownBits(Reg);
+        unsigned SignedBits = VTA.computeNumSignBits(Reg);
+        OS << "  " << MO << " KnownBits:" << Known << " SignBits:" << SignedBits
+           << '\n';
+      };
+    }
+  }
+  return PreservedAnalyses::all();
+}
diff --git a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
@@ -56,7 +56,7 @@ INITIALIZE_PASS_BEGIN(InstructionSelect, DEBUG_TYPE,
                      "Select target instructions out of generic instructions",
                      false, false)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_DEPENDENCY(ProfileSummaryInfoWrapperPass)
 INITIALIZE_PASS_DEPENDENCY(LazyBlockFrequencyInfoPass)
 INITIALIZE_PASS_END(InstructionSelect, DEBUG_TYPE,
@@ -120,8 +120,8 @@ class InstructionSelect::MIIteratorMaintainer : public GISelChangeObserver {

 void InstructionSelect::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<TargetPassConfig>();
-  AU.addRequired<GISelValueTrackingAnalysis>();
-  AU.addPreserved<GISelValueTrackingAnalysis>();
+  AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+  AU.addPreserved<GISelValueTrackingAnalysisLegacy>();

  if (OptLevel != CodeGenOptLevel::None) {
    AU.addRequired<ProfileSummaryInfoWrapperPass>();
@@ -146,7 +146,7 @@ bool InstructionSelect::runOnMachineFunction(MachineFunction &MF) {
  OptLevel = MF.getFunction().hasOptNone() ? CodeGenOptLevel::None
                                           : MF.getTarget().getOptLevel();

-  VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+  VT = &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
  if (OptLevel != CodeGenOptLevel::None) {
    PSI = &getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI();
    if (PSI && PSI->hasProfileSummary())

diff --git a/llvm/lib/CodeGen/GlobalISel/Legalizer.cpp b/llvm/lib/CodeGen/GlobalISel/Legalizer.cpp
@@ -75,7 +75,7 @@ INITIALIZE_PASS_BEGIN(Legalizer, DEBUG_TYPE,
                      false)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
 INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_END(Legalizer, DEBUG_TYPE,
                    "Legalize the Machine IR a function's Machine IR", false,
                    false)
@@ -86,8 +86,8 @@ void Legalizer::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<TargetPassConfig>();
  AU.addRequired<GISelCSEAnalysisWrapperPass>();
  AU.addPreserved<GISelCSEAnalysisWrapperPass>();
-  AU.addRequired<GISelValueTrackingAnalysis>();
-  AU.addPreserved<GISelValueTrackingAnalysis>();
+  AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+  AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
  getSelectionDAGFallbackAnalysisUsage(AU);
  MachineFunctionPass::getAnalysisUsage(AU);
 }
@@ -341,7 +341,8 @@ bool Legalizer::runOnMachineFunction(MachineFunction &MF) {
    AuxObservers.push_back(&LocObserver);

  // This allows Known Bits Analysis in the legalizer.
-  GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+  GISelValueTracking *VT =
+      &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);

  const LegalizerInfo &LI = *MF.getSubtarget().getLegalizerInfo();
  MFResult Result = legalizeMachineFunction(MF, LI, AuxObservers, LocObserver,

diff --git a/llvm/lib/Passes/CMakeLists.txt b/llvm/lib/Passes/CMakeLists.txt
@@ -19,6 +19,7 @@ add_llvm_component_library(LLVMPasses
  Analysis
  CFGuard
  CodeGen
+  GlobalISel
  Core
  Coroutines
  HipStdPar

diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
@@ -99,6 +99,7 @@
 #include "llvm/CodeGen/FinalizeISel.h"
 #include "llvm/CodeGen/FixupStatepointCallerSaved.h"
 #include "llvm/CodeGen/GCMetadata.h"
+#include "llvm/CodeGen/GlobalISel/GISelValueTracking.h"
 #include "llvm/CodeGen/GlobalMerge.h"
 #include "llvm/CodeGen/GlobalMergeFunctions.h"
 #include "llvm/CodeGen/HardwareLoops.h"

diff --git a/llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp
@@ -135,8 +135,8 @@ void AArch64O0PreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<TargetPassConfig>();
  AU.setPreservesCFG();
  getSelectionDAGFallbackAnalysisUsage(AU);
-  AU.addRequired<GISelValueTrackingAnalysis>();
-  AU.addPreserved<GISelValueTrackingAnalysis>();
+  AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+  AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
  MachineFunctionPass::getAnalysisUsage(AU);
 }

@@ -153,7 +153,8 @@ bool AArch64O0PreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
  auto &TPC = getAnalysis<TargetPassConfig>();

  const Function &F = MF.getFunction();
-  GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+  GISelValueTracking *VT =
+      &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);

  const AArch64Subtarget &ST = MF.getSubtarget<AArch64Subtarget>();

@@ -174,7 +175,7 @@ INITIALIZE_PASS_BEGIN(AArch64O0PreLegalizerCombiner, DEBUG_TYPE,
                      "Combine AArch64 machine instrs before legalization",
                      false, false)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
 INITIALIZE_PASS_END(AArch64O0PreLegalizerCombiner, DEBUG_TYPE,
                    "Combine AArch64 machine instrs before legalization", false,

diff --git a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
@@ -636,8 +636,8 @@ void AArch64PostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<TargetPassConfig>();
  AU.setPreservesCFG();
  getSelectionDAGFallbackAnalysisUsage(AU);
-  AU.addRequired<GISelValueTrackingAnalysis>();
-  AU.addPreserved<GISelValueTrackingAnalysis>();
+  AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+  AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
  if (!IsOptNone) {
    AU.addRequired<MachineDominatorTreeWrapperPass>();
    AU.addPreserved<MachineDominatorTreeWrapperPass>();
@@ -668,7 +668,8 @@ bool AArch64PostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
  const AArch64Subtarget &ST = MF.getSubtarget<AArch64Subtarget>();
  const auto *LI = ST.getLegalizerInfo();

-  GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+  GISelValueTracking *VT =
+      &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
  MachineDominatorTree *MDT =
      IsOptNone ? nullptr
                : &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
@@ -883,7 +884,7 @@ INITIALIZE_PASS_BEGIN(AArch64PostLegalizerCombiner, DEBUG_TYPE,
                      "Combine AArch64 MachineInstrs after legalization", false,
                      false)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_END(AArch64PostLegalizerCombiner, DEBUG_TYPE,
                    "Combine AArch64 MachineInstrs after legalization", false,
                    false)

diff --git a/llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp
@@ -820,8 +820,8 @@ void AArch64PreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<TargetPassConfig>();
  AU.setPreservesCFG();
  getSelectionDAGFallbackAnalysisUsage(AU);
-  AU.addRequired<GISelValueTrackingAnalysis>();
-  AU.addPreserved<GISelValueTrackingAnalysis>();
+  AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+  AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
  AU.addRequired<MachineDominatorTreeWrapperPass>();
  AU.addPreserved<MachineDominatorTreeWrapperPass>();
  AU.addRequired<GISelCSEAnalysisWrapperPass>();
@@ -852,7 +852,8 @@ bool AArch64PreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
  const Function &F = MF.getFunction();
  bool EnableOpt =
      MF.getTarget().getOptLevel() != CodeGenOptLevel::None && !skipFunction(F);
-  GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+  GISelValueTracking *VT =
+      &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
  MachineDominatorTree *MDT =
      &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
  CombinerInfo CInfo(/*AllowIllegalOps*/ true, /*ShouldLegalizeIllegal*/ false,
@@ -874,7 +875,7 @@ INITIALIZE_PASS_BEGIN(AArch64PreLegalizerCombiner, DEBUG_TYPE,
                      "Combine AArch64 machine instrs before legalization",
                      false, false)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
 INITIALIZE_PASS_END(AArch64PreLegalizerCombiner, DEBUG_TYPE,
                    "Combine AArch64 machine instrs before legalization", false,

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp b/llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp
@@ -462,8 +462,8 @@ void AMDGPUPostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.addRequired<TargetPassConfig>();
  AU.setPreservesCFG();
  getSelectionDAGFallbackAnalysisUsage(AU);
-  AU.addRequired<GISelValueTrackingAnalysis>();
-  AU.addPreserved<GISelValueTrackingAnalysis>();
+  AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+  AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
  if (!IsOptNone) {
    AU.addRequired<MachineDominatorTreeWrapperPass>();
    AU.addPreserved<MachineDominatorTreeWrapperPass>();
@@ -490,7 +490,8 @@ bool AMDGPUPostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
  const AMDGPULegalizerInfo *LI =
      static_cast<const AMDGPULegalizerInfo *>(ST.getLegalizerInfo());

-  GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+  GISelValueTracking *VT =
+      &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
  MachineDominatorTree *MDT =
      IsOptNone ? nullptr
                : &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
@@ -512,7 +513,7 @@ INITIALIZE_PASS_BEGIN(AMDGPUPostLegalizerCombiner, DEBUG_TYPE,
                      "Combine AMDGPU machine instrs after legalization", false,
                      false)
 INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
 INITIALIZE_PASS_END(AMDGPUPostLegalizerCombiner, DEBUG_TYPE,
                    "Combine AMDGPU machine instrs after legalization", false,
                    false)