YQ Connector: support managed ClickHouse

Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.

1 files changed, 1543 insertions, 0 deletions

diff --git a/contrib/libs/llvm14/lib/CodeGen/TargetPassConfig.cpp b/contrib/libs/llvm14/lib/CodeGen/TargetPassConfig.cpp
new file mode 100644
index 0000000000..05004fb935
--- /dev/null
+++ b/contrib/libs/llvm14/lib/CodeGen/TargetPassConfig.cpp
@@ -0,0 +1,1543 @@
+//===- TargetPassConfig.cpp - Target independent code generation passes ---===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines interfaces to access the target independent code
+// generation passes provided by the LLVM backend.
+//
+//===---------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Analysis/BasicAliasAnalysis.h"
+#include "llvm/Analysis/CFLAndersAliasAnalysis.h"
+#include "llvm/Analysis/CFLSteensAliasAnalysis.h"
+#include "llvm/Analysis/CallGraphSCCPass.h"
+#include "llvm/Analysis/ScopedNoAliasAA.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/Analysis/TypeBasedAliasAnalysis.h"
+#include "llvm/CodeGen/CSEConfigBase.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachinePassRegistry.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/RegAllocRegistry.h"
+#include "llvm/IR/IRPrintingPasses.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/IR/PassInstrumentation.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCTargetOptions.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/CodeGen.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Discriminator.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/SaveAndRestore.h"
+#include "llvm/Support/Threading.h"
+#include "llvm/Target/CGPassBuilderOption.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/Utils.h"
+#include "llvm/Transforms/Utils/SymbolRewriter.h"
+#include <cassert>
+#include <string>
+
+using namespace llvm;
+
+static cl::opt<bool>
+    EnableIPRA("enable-ipra", cl::init(false), cl::Hidden,
+               cl::desc("Enable interprocedural register allocation "
+                        "to reduce load/store at procedure calls."));
+static cl::opt<bool> DisablePostRASched("disable-post-ra", cl::Hidden,
+    cl::desc("Disable Post Regalloc Scheduler"));
+static cl::opt<bool> DisableBranchFold("disable-branch-fold", cl::Hidden,
+    cl::desc("Disable branch folding"));
+static cl::opt<bool> DisableTailDuplicate("disable-tail-duplicate", cl::Hidden,
+    cl::desc("Disable tail duplication"));
+static cl::opt<bool> DisableEarlyTailDup("disable-early-taildup", cl::Hidden,
+    cl::desc("Disable pre-register allocation tail duplication"));
+static cl::opt<bool> DisableBlockPlacement("disable-block-placement",
+    cl::Hidden, cl::desc("Disable probability-driven block placement"));
+static cl::opt<bool> EnableBlockPlacementStats("enable-block-placement-stats",
+    cl::Hidden, cl::desc("Collect probability-driven block placement stats"));
+static cl::opt<bool> DisableSSC("disable-ssc", cl::Hidden,
+    cl::desc("Disable Stack Slot Coloring"));
+static cl::opt<bool> DisableMachineDCE("disable-machine-dce", cl::Hidden,
+    cl::desc("Disable Machine Dead Code Elimination"));
+static cl::opt<bool> DisableEarlyIfConversion("disable-early-ifcvt", cl::Hidden,
+    cl::desc("Disable Early If-conversion"));
+static cl::opt<bool> DisableMachineLICM("disable-machine-licm", cl::Hidden,
+    cl::desc("Disable Machine LICM"));
+static cl::opt<bool> DisableMachineCSE("disable-machine-cse", cl::Hidden,
+    cl::desc("Disable Machine Common Subexpression Elimination"));
+static cl::opt<cl::boolOrDefault> OptimizeRegAlloc(
+    "optimize-regalloc", cl::Hidden,
+    cl::desc("Enable optimized register allocation compilation path."));
+static cl::opt<bool> DisablePostRAMachineLICM("disable-postra-machine-licm",
+    cl::Hidden,
+    cl::desc("Disable Machine LICM"));
+static cl::opt<bool> DisableMachineSink("disable-machine-sink", cl::Hidden,
+    cl::desc("Disable Machine Sinking"));
+static cl::opt<bool> DisablePostRAMachineSink("disable-postra-machine-sink",
+    cl::Hidden,
+    cl::desc("Disable PostRA Machine Sinking"));
+static cl::opt<bool> DisableLSR("disable-lsr", cl::Hidden,
+    cl::desc("Disable Loop Strength Reduction Pass"));
+static cl::opt<bool> DisableConstantHoisting("disable-constant-hoisting",
+    cl::Hidden, cl::desc("Disable ConstantHoisting"));
+static cl::opt<bool> DisableCGP("disable-cgp", cl::Hidden,
+    cl::desc("Disable Codegen Prepare"));
+static cl::opt<bool> DisableCopyProp("disable-copyprop", cl::Hidden,
+    cl::desc("Disable Copy Propagation pass"));
+static cl::opt<bool> DisablePartialLibcallInlining("disable-partial-libcall-inlining",
+    cl::Hidden, cl::desc("Disable Partial Libcall Inlining"));
+static cl::opt<bool> EnableImplicitNullChecks(
+    "enable-implicit-null-checks",
+    cl::desc("Fold null checks into faulting memory operations"),
+    cl::init(false), cl::Hidden);
+static cl::opt<bool> DisableMergeICmps("disable-mergeicmps",
+    cl::desc("Disable MergeICmps Pass"),
+    cl::init(false), cl::Hidden);
+static cl::opt<bool> PrintLSR("print-lsr-output", cl::Hidden,
+    cl::desc("Print LLVM IR produced by the loop-reduce pass"));
+static cl::opt<bool> PrintISelInput("print-isel-input", cl::Hidden,
+    cl::desc("Print LLVM IR input to isel pass"));
+static cl::opt<bool> PrintGCInfo("print-gc", cl::Hidden,
+    cl::desc("Dump garbage collector data"));
+static cl::opt<cl::boolOrDefault>
+    VerifyMachineCode("verify-machineinstrs", cl::Hidden,
+                      cl::desc("Verify generated machine code"),
+                      cl::ZeroOrMore);
+static cl::opt<cl::boolOrDefault> DebugifyAndStripAll(
+    "debugify-and-strip-all-safe", cl::Hidden,
+    cl::desc(
+        "Debugify MIR before and Strip debug after "
+        "each pass except those known to be unsafe when debug info is present"),
+    cl::ZeroOrMore);
+static cl::opt<cl::boolOrDefault> DebugifyCheckAndStripAll(
+    "debugify-check-and-strip-all-safe", cl::Hidden,
+    cl::desc(
+        "Debugify MIR before, by checking and stripping the debug info after, "
+        "each pass except those known to be unsafe when debug info is present"),
+    cl::ZeroOrMore);
+// Enable or disable the MachineOutliner.
+static cl::opt<RunOutliner> EnableMachineOutliner(
+    "enable-machine-outliner", cl::desc("Enable the machine outliner"),
+    cl::Hidden, cl::ValueOptional, cl::init(RunOutliner::TargetDefault),
+    cl::values(clEnumValN(RunOutliner::AlwaysOutline, "always",
+                          "Run on all functions guaranteed to be beneficial"),
+               clEnumValN(RunOutliner::NeverOutline, "never",
+                          "Disable all outlining"),
+               // Sentinel value for unspecified option.
+               clEnumValN(RunOutliner::AlwaysOutline, "", "")));
+// Enable or disable FastISel. Both options are needed, because
+// FastISel is enabled by default with -fast, and we wish to be
+// able to enable or disable fast-isel independently from -O0.
+static cl::opt<cl::boolOrDefault>
+EnableFastISelOption("fast-isel", cl::Hidden,
+  cl::desc("Enable the \"fast\" instruction selector"));
+
+static cl::opt<cl::boolOrDefault> EnableGlobalISelOption(
+    "global-isel", cl::Hidden,
+    cl::desc("Enable the \"global\" instruction selector"));
+
+// FIXME: remove this after switching to NPM or GlobalISel, whichever gets there
+//        first...
+static cl::opt<bool>
+    PrintAfterISel("print-after-isel", cl::init(false), cl::Hidden,
+                   cl::desc("Print machine instrs after ISel"));
+
+static cl::opt<GlobalISelAbortMode> EnableGlobalISelAbort(
+    "global-isel-abort", cl::Hidden,
+    cl::desc("Enable abort calls when \"global\" instruction selection "
+             "fails to lower/select an instruction"),
+    cl::values(
+        clEnumValN(GlobalISelAbortMode::Disable, "0", "Disable the abort"),
+        clEnumValN(GlobalISelAbortMode::Enable, "1", "Enable the abort"),
+        clEnumValN(GlobalISelAbortMode::DisableWithDiag, "2",
+                   "Disable the abort but emit a diagnostic on failure")));
+
+// An option that disables inserting FS-AFDO discriminators before emit.
+// This is mainly for debugging and tuning purpose.
+static cl::opt<bool>
+    FSNoFinalDiscrim("fs-no-final-discrim", cl::init(false), cl::Hidden,
+                     cl::desc("Do not insert FS-AFDO discriminators before "
+                              "emit."));
+// Disable MIRProfileLoader before RegAlloc. This is for for debugging and
+// tuning purpose.
+static cl::opt<bool> DisableRAFSProfileLoader(
+    "disable-ra-fsprofile-loader", cl::init(true), cl::Hidden,
+    cl::desc("Disable MIRProfileLoader before RegAlloc"));
+// Disable MIRProfileLoader before BloackPlacement. This is for for debugging
+// and tuning purpose.
+static cl::opt<bool> DisableLayoutFSProfileLoader(
+    "disable-layout-fsprofile-loader", cl::init(true), cl::Hidden,
+    cl::desc("Disable MIRProfileLoader before BlockPlacement"));
+// Specify FSProfile file name.
+static cl::opt<std::string>
+    FSProfileFile("fs-profile-file", cl::init(""), cl::value_desc("filename"),
+                  cl::desc("Flow Sensitive profile file name."), cl::Hidden);
+// Specify Remapping file for FSProfile.
+static cl::opt<std::string> FSRemappingFile(
+    "fs-remapping-file", cl::init(""), cl::value_desc("filename"),
+    cl::desc("Flow Sensitive profile remapping file name."), cl::Hidden);
+
+// Temporary option to allow experimenting with MachineScheduler as a post-RA
+// scheduler. Targets can "properly" enable this with
+// substitutePass(&PostRASchedulerID, &PostMachineSchedulerID).
+// Targets can return true in targetSchedulesPostRAScheduling() and
+// insert a PostRA scheduling pass wherever it wants.
+static cl::opt<bool> MISchedPostRA(
+    "misched-postra", cl::Hidden,
+    cl::desc(
+        "Run MachineScheduler post regalloc (independent of preRA sched)"));
+
+// Experimental option to run live interval analysis early.
+static cl::opt<bool> EarlyLiveIntervals("early-live-intervals", cl::Hidden,
+    cl::desc("Run live interval analysis earlier in the pipeline"));
+
+// Experimental option to use CFL-AA in codegen
+static cl::opt<CFLAAType> UseCFLAA(
+    "use-cfl-aa-in-codegen", cl::init(CFLAAType::None), cl::Hidden,
+    cl::desc("Enable the new, experimental CFL alias analysis in CodeGen"),
+    cl::values(clEnumValN(CFLAAType::None, "none", "Disable CFL-AA"),
+               clEnumValN(CFLAAType::Steensgaard, "steens",
+                          "Enable unification-based CFL-AA"),
+               clEnumValN(CFLAAType::Andersen, "anders",
+                          "Enable inclusion-based CFL-AA"),
+               clEnumValN(CFLAAType::Both, "both",
+                          "Enable both variants of CFL-AA")));
+
+/// Option names for limiting the codegen pipeline.
+/// Those are used in error reporting and we didn't want
+/// to duplicate their names all over the place.
+static const char StartAfterOptName[] = "start-after";
+static const char StartBeforeOptName[] = "start-before";
+static const char StopAfterOptName[] = "stop-after";
+static const char StopBeforeOptName[] = "stop-before";
+
+static cl::opt<std::string>
+    StartAfterOpt(StringRef(StartAfterOptName),
+                  cl::desc("Resume compilation after a specific pass"),
+                  cl::value_desc("pass-name"), cl::init(""), cl::Hidden);
+
+static cl::opt<std::string>
+    StartBeforeOpt(StringRef(StartBeforeOptName),
+                   cl::desc("Resume compilation before a specific pass"),
+                   cl::value_desc("pass-name"), cl::init(""), cl::Hidden);
+
+static cl::opt<std::string>
+    StopAfterOpt(StringRef(StopAfterOptName),
+                 cl::desc("Stop compilation after a specific pass"),
+                 cl::value_desc("pass-name"), cl::init(""), cl::Hidden);
+
+static cl::opt<std::string>
+    StopBeforeOpt(StringRef(StopBeforeOptName),
+                  cl::desc("Stop compilation before a specific pass"),
+                  cl::value_desc("pass-name"), cl::init(""), cl::Hidden);
+
+/// Enable the machine function splitter pass.
+static cl::opt<bool> EnableMachineFunctionSplitter(
+    "enable-split-machine-functions", cl::Hidden,
+    cl::desc("Split out cold blocks from machine functions based on profile "
+             "information."));
+
+/// Disable the expand reductions pass for testing.
+static cl::opt<bool> DisableExpandReductions(
+    "disable-expand-reductions", cl::init(false), cl::Hidden,
+    cl::desc("Disable the expand reduction intrinsics pass from running"));
+
+/// Allow standard passes to be disabled by command line options. This supports
+/// simple binary flags that either suppress the pass or do nothing.
+/// i.e. -disable-mypass=false has no effect.
+/// These should be converted to boolOrDefault in order to use applyOverride.
+static IdentifyingPassPtr applyDisable(IdentifyingPassPtr PassID,
+                                       bool Override) {
+  if (Override)
+    return IdentifyingPassPtr();
+  return PassID;
+}
+
+/// Allow standard passes to be disabled by the command line, regardless of who
+/// is adding the pass.
+///
+/// StandardID is the pass identified in the standard pass pipeline and provided
+/// to addPass(). It may be a target-specific ID in the case that the target
+/// directly adds its own pass, but in that case we harmlessly fall through.
+///
+/// TargetID is the pass that the target has configured to override StandardID.
+///
+/// StandardID may be a pseudo ID. In that case TargetID is the name of the real
+/// pass to run. This allows multiple options to control a single pass depending
+/// on where in the pipeline that pass is added.
+static IdentifyingPassPtr overridePass(AnalysisID StandardID,
+                                       IdentifyingPassPtr TargetID) {
+  if (StandardID == &PostRASchedulerID)
+    return applyDisable(TargetID, DisablePostRASched);
+
+  if (StandardID == &BranchFolderPassID)
+    return applyDisable(TargetID, DisableBranchFold);
+
+  if (StandardID == &TailDuplicateID)
+    return applyDisable(TargetID, DisableTailDuplicate);
+
+  if (StandardID == &EarlyTailDuplicateID)
+    return applyDisable(TargetID, DisableEarlyTailDup);
+
+  if (StandardID == &MachineBlockPlacementID)
+    return applyDisable(TargetID, DisableBlockPlacement);
+
+  if (StandardID == &StackSlotColoringID)
+    return applyDisable(TargetID, DisableSSC);
+
+  if (StandardID == &DeadMachineInstructionElimID)
+    return applyDisable(TargetID, DisableMachineDCE);
+
+  if (StandardID == &EarlyIfConverterID)
+    return applyDisable(TargetID, DisableEarlyIfConversion);
+
+  if (StandardID == &EarlyMachineLICMID)
+    return applyDisable(TargetID, DisableMachineLICM);
+
+  if (StandardID == &MachineCSEID)
+    return applyDisable(TargetID, DisableMachineCSE);
+
+  if (StandardID == &MachineLICMID)
+    return applyDisable(TargetID, DisablePostRAMachineLICM);
+
+  if (StandardID == &MachineSinkingID)
+    return applyDisable(TargetID, DisableMachineSink);
+
+  if (StandardID == &PostRAMachineSinkingID)
+    return applyDisable(TargetID, DisablePostRAMachineSink);
+
+  if (StandardID == &MachineCopyPropagationID)
+    return applyDisable(TargetID, DisableCopyProp);
+
+  return TargetID;
+}
+
+// Find the FSProfile file name. The internal option takes the precedence
+// before getting from TargetMachine.
+static std::string getFSProfileFile(const TargetMachine *TM) {
+  if (!FSProfileFile.empty())
+    return FSProfileFile.getValue();
+  const Optional<PGOOptions> &PGOOpt = TM->getPGOOption();
+  if (PGOOpt == None || PGOOpt->Action != PGOOptions::SampleUse)
+    return std::string();
+  return PGOOpt->ProfileFile;
+}
+
+// Find the Profile remapping file name. The internal option takes the
+// precedence before getting from TargetMachine.
+static std::string getFSRemappingFile(const TargetMachine *TM) {
+  if (!FSRemappingFile.empty())
+    return FSRemappingFile.getValue();
+  const Optional<PGOOptions> &PGOOpt = TM->getPGOOption();
+  if (PGOOpt == None || PGOOpt->Action != PGOOptions::SampleUse)
+    return std::string();
+  return PGOOpt->ProfileRemappingFile;
+}
+
+//===---------------------------------------------------------------------===//
+/// TargetPassConfig
+//===---------------------------------------------------------------------===//
+
+INITIALIZE_PASS(TargetPassConfig, "targetpassconfig",
+                "Target Pass Configuration", false, false)
+char TargetPassConfig::ID = 0;
+
+namespace {
+
+struct InsertedPass {
+  AnalysisID TargetPassID;
+  IdentifyingPassPtr InsertedPassID;
+
+  InsertedPass(AnalysisID TargetPassID, IdentifyingPassPtr InsertedPassID)
+      : TargetPassID(TargetPassID), InsertedPassID(InsertedPassID) {}
+
+  Pass *getInsertedPass() const {
+    assert(InsertedPassID.isValid() && "Illegal Pass ID!");
+    if (InsertedPassID.isInstance())
+      return InsertedPassID.getInstance();
+    Pass *NP = Pass::createPass(InsertedPassID.getID());
+    assert(NP && "Pass ID not registered");
+    return NP;
+  }
+};
+
+} // end anonymous namespace
+
+namespace llvm {
+
+extern cl::opt<bool> EnableFSDiscriminator;
+
+class PassConfigImpl {
+public:
+  // List of passes explicitly substituted by this target. Normally this is
+  // empty, but it is a convenient way to suppress or replace specific passes
+  // that are part of a standard pass pipeline without overridding the entire
+  // pipeline. This mechanism allows target options to inherit a standard pass's
+  // user interface. For example, a target may disable a standard pass by
+  // default by substituting a pass ID of zero, and the user may still enable
+  // that standard pass with an explicit command line option.
+  DenseMap<AnalysisID,IdentifyingPassPtr> TargetPasses;
+
+  /// Store the pairs of <AnalysisID, AnalysisID> of which the second pass
+  /// is inserted after each instance of the first one.
+  SmallVector<InsertedPass, 4> InsertedPasses;
+};
+
+} // end namespace llvm
+
+// Out of line virtual method.
+TargetPassConfig::~TargetPassConfig() {
+  delete Impl;
+}
+
+static const PassInfo *getPassInfo(StringRef PassName) {
+  if (PassName.empty())
+    return nullptr;
+
+  const PassRegistry &PR = *PassRegistry::getPassRegistry();
+  const PassInfo *PI = PR.getPassInfo(PassName);
+  if (!PI)
+    report_fatal_error(Twine('\"') + Twine(PassName) +
+                       Twine("\" pass is not registered."));
+  return PI;
+}
+
+static AnalysisID getPassIDFromName(StringRef PassName) {
+  const PassInfo *PI = getPassInfo(PassName);
+  return PI ? PI->getTypeInfo() : nullptr;
+}
+
+static std::pair<StringRef, unsigned>
+getPassNameAndInstanceNum(StringRef PassName) {
+  StringRef Name, InstanceNumStr;
+  std::tie(Name, InstanceNumStr) = PassName.split(',');
+
+  unsigned InstanceNum = 0;
+  if (!InstanceNumStr.empty() && InstanceNumStr.getAsInteger(10, InstanceNum))
+    report_fatal_error("invalid pass instance specifier " + PassName);
+
+  return std::make_pair(Name, InstanceNum);
+}
+
+void TargetPassConfig::setStartStopPasses() {
+  StringRef StartBeforeName;
+  std::tie(StartBeforeName, StartBeforeInstanceNum) =
+    getPassNameAndInstanceNum(StartBeforeOpt);
+
+  StringRef StartAfterName;
+  std::tie(StartAfterName, StartAfterInstanceNum) =
+    getPassNameAndInstanceNum(StartAfterOpt);
+
+  StringRef StopBeforeName;
+  std::tie(StopBeforeName, StopBeforeInstanceNum)
+    = getPassNameAndInstanceNum(StopBeforeOpt);
+
+  StringRef StopAfterName;
+  std::tie(StopAfterName, StopAfterInstanceNum)
+    = getPassNameAndInstanceNum(StopAfterOpt);
+
+  StartBefore = getPassIDFromName(StartBeforeName);
+  StartAfter = getPassIDFromName(StartAfterName);
+  StopBefore = getPassIDFromName(StopBeforeName);
+  StopAfter = getPassIDFromName(StopAfterName);
+  if (StartBefore && StartAfter)
+    report_fatal_error(Twine(StartBeforeOptName) + Twine(" and ") +
+                       Twine(StartAfterOptName) + Twine(" specified!"));
+  if (StopBefore && StopAfter)
+    report_fatal_error(Twine(StopBeforeOptName) + Twine(" and ") +
+                       Twine(StopAfterOptName) + Twine(" specified!"));
+  Started = (StartAfter == nullptr) && (StartBefore == nullptr);
+}
+
+CGPassBuilderOption llvm::getCGPassBuilderOption() {
+  CGPassBuilderOption Opt;
+
+#define SET_OPTION(Option)                                                     \
+  if (Option.getNumOccurrences())                                              \
+    Opt.Option = Option;
+
+  SET_OPTION(EnableFastISelOption)
+  SET_OPTION(EnableGlobalISelAbort)
+  SET_OPTION(EnableGlobalISelOption)
+  SET_OPTION(EnableIPRA)
+  SET_OPTION(OptimizeRegAlloc)
+  SET_OPTION(VerifyMachineCode)
+
+#define SET_BOOLEAN_OPTION(Option) Opt.Option = Option;
+
+  SET_BOOLEAN_OPTION(EarlyLiveIntervals)
+  SET_BOOLEAN_OPTION(EnableBlockPlacementStats)
+  SET_BOOLEAN_OPTION(EnableImplicitNullChecks)
+  SET_BOOLEAN_OPTION(EnableMachineOutliner)
+  SET_BOOLEAN_OPTION(MISchedPostRA)
+  SET_BOOLEAN_OPTION(UseCFLAA)
+  SET_BOOLEAN_OPTION(DisableMergeICmps)
+  SET_BOOLEAN_OPTION(DisableLSR)
+  SET_BOOLEAN_OPTION(DisableConstantHoisting)
+  SET_BOOLEAN_OPTION(DisableCGP)
+  SET_BOOLEAN_OPTION(DisablePartialLibcallInlining)
+  SET_BOOLEAN_OPTION(PrintLSR)
+  SET_BOOLEAN_OPTION(PrintISelInput)
+  SET_BOOLEAN_OPTION(PrintGCInfo)
+
+  return Opt;
+}
+
+static void registerPartialPipelineCallback(PassInstrumentationCallbacks &PIC,
+                                            LLVMTargetMachine &LLVMTM) {
+  StringRef StartBefore;
+  StringRef StartAfter;
+  StringRef StopBefore;
+  StringRef StopAfter;
+
+  unsigned StartBeforeInstanceNum = 0;
+  unsigned StartAfterInstanceNum = 0;
+  unsigned StopBeforeInstanceNum = 0;
+  unsigned StopAfterInstanceNum = 0;
+
+  std::tie(StartBefore, StartBeforeInstanceNum) =
+      getPassNameAndInstanceNum(StartBeforeOpt);
+  std::tie(StartAfter, StartAfterInstanceNum) =
+      getPassNameAndInstanceNum(StartAfterOpt);
+  std::tie(StopBefore, StopBeforeInstanceNum) =
+      getPassNameAndInstanceNum(StopBeforeOpt);
+  std::tie(StopAfter, StopAfterInstanceNum) =
+      getPassNameAndInstanceNum(StopAfterOpt);
+
+  if (StartBefore.empty() && StartAfter.empty() && StopBefore.empty() &&
+      StopAfter.empty())
+    return;
+
+  std::tie(StartBefore, std::ignore) =
+      LLVMTM.getPassNameFromLegacyName(StartBefore);
+  std::tie(StartAfter, std::ignore) =
+      LLVMTM.getPassNameFromLegacyName(StartAfter);
+  std::tie(StopBefore, std::ignore) =
+      LLVMTM.getPassNameFromLegacyName(StopBefore);
+  std::tie(StopAfter, std::ignore) =
+      LLVMTM.getPassNameFromLegacyName(StopAfter);
+  if (!StartBefore.empty() && !StartAfter.empty())
+    report_fatal_error(Twine(StartBeforeOptName) + Twine(" and ") +
+                       Twine(StartAfterOptName) + Twine(" specified!"));
+  if (!StopBefore.empty() && !StopAfter.empty())
+    report_fatal_error(Twine(StopBeforeOptName) + Twine(" and ") +
+                       Twine(StopAfterOptName) + Twine(" specified!"));
+
+  PIC.registerShouldRunOptionalPassCallback(
+      [=, EnableCurrent = StartBefore.empty() && StartAfter.empty(),
+       EnableNext = Optional<bool>(), StartBeforeCount = 0u,
+       StartAfterCount = 0u, StopBeforeCount = 0u,
+       StopAfterCount = 0u](StringRef P, Any) mutable {
+        bool StartBeforePass = !StartBefore.empty() && P.contains(StartBefore);
+        bool StartAfterPass = !StartAfter.empty() && P.contains(StartAfter);
+        bool StopBeforePass = !StopBefore.empty() && P.contains(StopBefore);
+        bool StopAfterPass = !StopAfter.empty() && P.contains(StopAfter);
+
+        // Implement -start-after/-stop-after
+        if (EnableNext) {
+          EnableCurrent = *EnableNext;
+          EnableNext.reset();
+        }
+
+        // Using PIC.registerAfterPassCallback won't work because if this
+        // callback returns false, AfterPassCallback is also skipped.
+        if (StartAfterPass && StartAfterCount++ == StartAfterInstanceNum) {
+          assert(!EnableNext && "Error: assign to EnableNext more than once");
+          EnableNext = true;
+        }
+        if (StopAfterPass && StopAfterCount++ == StopAfterInstanceNum) {
+          assert(!EnableNext && "Error: assign to EnableNext more than once");
+          EnableNext = false;
+        }
+
+        if (StartBeforePass && StartBeforeCount++ == StartBeforeInstanceNum)
+          EnableCurrent = true;
+        if (StopBeforePass && StopBeforeCount++ == StopBeforeInstanceNum)
+          EnableCurrent = false;
+        return EnableCurrent;
+      });
+}
+
+void llvm::registerCodeGenCallback(PassInstrumentationCallbacks &PIC,
+                                   LLVMTargetMachine &LLVMTM) {
+
+  // Register a callback for disabling passes.
+  PIC.registerShouldRunOptionalPassCallback([](StringRef P, Any) {
+
+#define DISABLE_PASS(Option, Name)                                             \
+  if (Option && P.contains(#Name))                                             \
+    return false;
+    DISABLE_PASS(DisableBlockPlacement, MachineBlockPlacementPass)
+    DISABLE_PASS(DisableBranchFold, BranchFolderPass)
+    DISABLE_PASS(DisableCopyProp, MachineCopyPropagationPass)
+    DISABLE_PASS(DisableEarlyIfConversion, EarlyIfConverterPass)
+    DISABLE_PASS(DisableEarlyTailDup, EarlyTailDuplicatePass)
+    DISABLE_PASS(DisableMachineCSE, MachineCSEPass)
+    DISABLE_PASS(DisableMachineDCE, DeadMachineInstructionElimPass)
+    DISABLE_PASS(DisableMachineLICM, EarlyMachineLICMPass)
+    DISABLE_PASS(DisableMachineSink, MachineSinkingPass)
+    DISABLE_PASS(DisablePostRAMachineLICM, MachineLICMPass)
+    DISABLE_PASS(DisablePostRAMachineSink, PostRAMachineSinkingPass)
+    DISABLE_PASS(DisablePostRASched, PostRASchedulerPass)
+    DISABLE_PASS(DisableSSC, StackSlotColoringPass)
+    DISABLE_PASS(DisableTailDuplicate, TailDuplicatePass)
+
+    return true;
+  });
+
+  registerPartialPipelineCallback(PIC, LLVMTM);
+}
+
+// Out of line constructor provides default values for pass options and
+// registers all common codegen passes.
+TargetPassConfig::TargetPassConfig(LLVMTargetMachine &TM, PassManagerBase &pm)
+    : ImmutablePass(ID), PM(&pm), TM(&TM) {
+  Impl = new PassConfigImpl();
+
+  // Register all target independent codegen passes to activate their PassIDs,
+  // including this pass itself.
+  initializeCodeGen(*PassRegistry::getPassRegistry());
+
+  // Also register alias analysis passes required by codegen passes.
+  initializeBasicAAWrapperPassPass(*PassRegistry::getPassRegistry());
+  initializeAAResultsWrapperPassPass(*PassRegistry::getPassRegistry());
+
+  if (EnableIPRA.getNumOccurrences())
+    TM.Options.EnableIPRA = EnableIPRA;
+  else {
+    // If not explicitly specified, use target default.
+    TM.Options.EnableIPRA |= TM.useIPRA();
+  }
+
+  if (TM.Options.EnableIPRA)
+    setRequiresCodeGenSCCOrder();
+
+  if (EnableGlobalISelAbort.getNumOccurrences())
+    TM.Options.GlobalISelAbort = EnableGlobalISelAbort;
+
+  setStartStopPasses();
+}
+
+CodeGenOpt::Level TargetPassConfig::getOptLevel() const {
+  return TM->getOptLevel();
+}
+
+/// Insert InsertedPassID pass after TargetPassID.
+void TargetPassConfig::insertPass(AnalysisID TargetPassID,
+                                  IdentifyingPassPtr InsertedPassID) {
+  assert(((!InsertedPassID.isInstance() &&
+           TargetPassID != InsertedPassID.getID()) ||
+          (InsertedPassID.isInstance() &&
+           TargetPassID != InsertedPassID.getInstance()->getPassID())) &&
+         "Insert a pass after itself!");
+  Impl->InsertedPasses.emplace_back(TargetPassID, InsertedPassID);
+}
+
+/// createPassConfig - Create a pass configuration object to be used by
+/// addPassToEmitX methods for generating a pipeline of CodeGen passes.
+///
+/// Targets may override this to extend TargetPassConfig.
+TargetPassConfig *LLVMTargetMachine::createPassConfig(PassManagerBase &PM) {
+  return new TargetPassConfig(*this, PM);
+}
+
+TargetPassConfig::TargetPassConfig()
+  : ImmutablePass(ID) {
+  report_fatal_error("Trying to construct TargetPassConfig without a target "
+                     "machine. Scheduling a CodeGen pass without a target "
+                     "triple set?");
+}
+
+bool TargetPassConfig::willCompleteCodeGenPipeline() {
+  return StopBeforeOpt.empty() && StopAfterOpt.empty();
+}
+
+bool TargetPassConfig::hasLimitedCodeGenPipeline() {
+  return !StartBeforeOpt.empty() || !StartAfterOpt.empty() ||
+         !willCompleteCodeGenPipeline();
+}
+
+std::string
+TargetPassConfig::getLimitedCodeGenPipelineReason(const char *Separator) {
+  if (!hasLimitedCodeGenPipeline())
+    return std::string();
+  std::string Res;
+  static cl::opt<std::string> *PassNames[] = {&StartAfterOpt, &StartBeforeOpt,
+                                              &StopAfterOpt, &StopBeforeOpt};
+  static const char *OptNames[] = {StartAfterOptName, StartBeforeOptName,
+                                   StopAfterOptName, StopBeforeOptName};
+  bool IsFirst = true;
+  for (int Idx = 0; Idx < 4; ++Idx)
+    if (!PassNames[Idx]->empty()) {
+      if (!IsFirst)
+        Res += Separator;
+      IsFirst = false;
+      Res += OptNames[Idx];
+    }
+  return Res;
+}
+
+// Helper to verify the analysis is really immutable.
+void TargetPassConfig::setOpt(bool &Opt, bool Val) {
+  assert(!Initialized && "PassConfig is immutable");
+  Opt = Val;
+}
+
+void TargetPassConfig::substitutePass(AnalysisID StandardID,
+                                      IdentifyingPassPtr TargetID) {
+  Impl->TargetPasses[StandardID] = TargetID;
+}
+
+IdentifyingPassPtr TargetPassConfig::getPassSubstitution(AnalysisID ID) const {
+  DenseMap<AnalysisID, IdentifyingPassPtr>::const_iterator
+    I = Impl->TargetPasses.find(ID);
+  if (I == Impl->TargetPasses.end())
+    return ID;
+  return I->second;
+}
+
+bool TargetPassConfig::isPassSubstitutedOrOverridden(AnalysisID ID) const {
+  IdentifyingPassPtr TargetID = getPassSubstitution(ID);
+  IdentifyingPassPtr FinalPtr = overridePass(ID, TargetID);
+  return !FinalPtr.isValid() || FinalPtr.isInstance() ||
+      FinalPtr.getID() != ID;
+}
+
+/// Add a pass to the PassManager if that pass is supposed to be run.  If the
+/// Started/Stopped flags indicate either that the compilation should start at
+/// a later pass or that it should stop after an earlier pass, then do not add
+/// the pass.  Finally, compare the current pass against the StartAfter
+/// and StopAfter options and change the Started/Stopped flags accordingly.
+void TargetPassConfig::addPass(Pass *P) {
+  assert(!Initialized && "PassConfig is immutable");
+
+  // Cache the Pass ID here in case the pass manager finds this pass is
+  // redundant with ones already scheduled / available, and deletes it.
+  // Fundamentally, once we add the pass to the manager, we no longer own it
+  // and shouldn't reference it.
+  AnalysisID PassID = P->getPassID();
+
+  if (StartBefore == PassID && StartBeforeCount++ == StartBeforeInstanceNum)
+    Started = true;
+  if (StopBefore == PassID && StopBeforeCount++ == StopBeforeInstanceNum)
+    Stopped = true;
+  if (Started && !Stopped) {
+    if (AddingMachinePasses)
+      addMachinePrePasses();
+    std::string Banner;
+    // Construct banner message before PM->add() as that may delete the pass.
+    if (AddingMachinePasses)
+      Banner = std::string("After ") + std::string(P->getPassName());
+    PM->add(P);
+    if (AddingMachinePasses)
+      addMachinePostPasses(Banner);
+
+    // Add the passes after the pass P if there is any.
+    for (const auto &IP : Impl->InsertedPasses) {
+      if (IP.TargetPassID == PassID)
+        addPass(IP.getInsertedPass());
+    }
+  } else {
+    delete P;
+  }
+
+  if (StopAfter == PassID && StopAfterCount++ == StopAfterInstanceNum)
+    Stopped = true;
+
+  if (StartAfter == PassID && StartAfterCount++ == StartAfterInstanceNum)
+    Started = true;
+  if (Stopped && !Started)
+    report_fatal_error("Cannot stop compilation after pass that is not run");
+}
+
+/// Add a CodeGen pass at this point in the pipeline after checking for target
+/// and command line overrides.
+///
+/// addPass cannot return a pointer to the pass instance because is internal the
+/// PassManager and the instance we create here may already be freed.
+AnalysisID TargetPassConfig::addPass(AnalysisID PassID) {
+  IdentifyingPassPtr TargetID = getPassSubstitution(PassID);
+  IdentifyingPassPtr FinalPtr = overridePass(PassID, TargetID);
+  if (!FinalPtr.isValid())
+    return nullptr;
+
+  Pass *P;
+  if (FinalPtr.isInstance())
+    P = FinalPtr.getInstance();
+  else {
+    P = Pass::createPass(FinalPtr.getID());
+    if (!P)
+      llvm_unreachable("Pass ID not registered");
+  }
+  AnalysisID FinalID = P->getPassID();
+  addPass(P); // Ends the lifetime of P.
+
+  return FinalID;
+}
+
+void TargetPassConfig::printAndVerify(const std::string &Banner) {
+  addPrintPass(Banner);
+  addVerifyPass(Banner);
+}
+
+void TargetPassConfig::addPrintPass(const std::string &Banner) {
+  if (PrintAfterISel)
+    PM->add(createMachineFunctionPrinterPass(dbgs(), Banner));
+}
+
+void TargetPassConfig::addVerifyPass(const std::string &Banner) {
+  bool Verify = VerifyMachineCode == cl::BOU_TRUE;
+#ifdef EXPENSIVE_CHECKS
+  if (VerifyMachineCode == cl::BOU_UNSET)
+    Verify = TM->isMachineVerifierClean();
+#endif
+  if (Verify)
+    PM->add(createMachineVerifierPass(Banner));
+}
+
+void TargetPassConfig::addDebugifyPass() {
+  PM->add(createDebugifyMachineModulePass());
+}
+
+void TargetPassConfig::addStripDebugPass() {
+  PM->add(createStripDebugMachineModulePass(/*OnlyDebugified=*/true));
+}
+
+void TargetPassConfig::addCheckDebugPass() {
+  PM->add(createCheckDebugMachineModulePass());
+}
+
+void TargetPassConfig::addMachinePrePasses(bool AllowDebugify) {
+  if (AllowDebugify && DebugifyIsSafe &&
+      (DebugifyAndStripAll == cl::BOU_TRUE ||
+       DebugifyCheckAndStripAll == cl::BOU_TRUE))
+    addDebugifyPass();
+}
+
+void TargetPassConfig::addMachinePostPasses(const std::string &Banner) {
+  if (DebugifyIsSafe) {
+    if (DebugifyCheckAndStripAll == cl::BOU_TRUE) {
+      addCheckDebugPass();
+      addStripDebugPass();
+    } else if (DebugifyAndStripAll == cl::BOU_TRUE)
+      addStripDebugPass();
+  }
+  addVerifyPass(Banner);
+}
+
+/// Add common target configurable passes that perform LLVM IR to IR transforms
+/// following machine independent optimization.
+void TargetPassConfig::addIRPasses() {
+  // Before running any passes, run the verifier to determine if the input
+  // coming from the front-end and/or optimizer is valid.
+  if (!DisableVerify)
+    addPass(createVerifierPass());
+
+  if (getOptLevel() != CodeGenOpt::None) {
+    switch (UseCFLAA) {
+    case CFLAAType::Steensgaard:
+      addPass(createCFLSteensAAWrapperPass());
+      break;
+    case CFLAAType::Andersen:
+      addPass(createCFLAndersAAWrapperPass());
+      break;
+    case CFLAAType::Both:
+      addPass(createCFLAndersAAWrapperPass());
+      addPass(createCFLSteensAAWrapperPass());
+      break;
+    default:
+      break;
+    }
+
+    // Basic AliasAnalysis support.
+    // Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that
+    // BasicAliasAnalysis wins if they disagree. This is intended to help
+    // support "obvious" type-punning idioms.
+    addPass(createTypeBasedAAWrapperPass());
+    addPass(createScopedNoAliasAAWrapperPass());
+    addPass(createBasicAAWrapperPass());
+
+    // Run loop strength reduction before anything else.
+    if (!DisableLSR) {
+      addPass(createCanonicalizeFreezeInLoopsPass());
+      addPass(createLoopStrengthReducePass());
+      if (PrintLSR)
+        addPass(createPrintFunctionPass(dbgs(),
+                                        "\n\n*** Code after LSR ***\n"));
+    }
+
+    // The MergeICmpsPass tries to create memcmp calls by grouping sequences of
+    // loads and compares. ExpandMemCmpPass then tries to expand those calls
+    // into optimally-sized loads and compares. The transforms are enabled by a
+    // target lowering hook.
+    if (!DisableMergeICmps)
+      addPass(createMergeICmpsLegacyPass());
+    addPass(createExpandMemCmpPass());
+  }
+
+  // Run GC lowering passes for builtin collectors
+  // TODO: add a pass insertion point here
+  addPass(&GCLoweringID);
+  addPass(&ShadowStackGCLoweringID);
+  addPass(createLowerConstantIntrinsicsPass());
+
+  // Make sure that no unreachable blocks are instruction selected.
+  addPass(createUnreachableBlockEliminationPass());
+
+  // Prepare expensive constants for SelectionDAG.
+  if (getOptLevel() != CodeGenOpt::None && !DisableConstantHoisting)
+    addPass(createConstantHoistingPass());
+
+  if (getOptLevel() != CodeGenOpt::None)
+    addPass(createReplaceWithVeclibLegacyPass());
+
+  if (getOptLevel() != CodeGenOpt::None && !DisablePartialLibcallInlining)
+    addPass(createPartiallyInlineLibCallsPass());
+
+  // Expand vector predication intrinsics into standard IR instructions.
+  // This pass has to run before ScalarizeMaskedMemIntrin and ExpandReduction
+  // passes since it emits those kinds of intrinsics.
+  addPass(createExpandVectorPredicationPass());
+
+  // Add scalarization of target's unsupported masked memory intrinsics pass.
+  // the unsupported intrinsic will be replaced with a chain of basic blocks,
+  // that stores/loads element one-by-one if the appropriate mask bit is set.
+  addPass(createScalarizeMaskedMemIntrinLegacyPass());
+
+  // Expand reduction intrinsics into shuffle sequences if the target wants to.
+  // Allow disabling it for testing purposes.
+  if (!DisableExpandReductions)
+    addPass(createExpandReductionsPass());
+}
+
+/// Turn exception handling constructs into something the code generators can
+/// handle.
+void TargetPassConfig::addPassesToHandleExceptions() {
+  const MCAsmInfo *MCAI = TM->getMCAsmInfo();
+  assert(MCAI && "No MCAsmInfo");
+  switch (MCAI->getExceptionHandlingType()) {
+  case ExceptionHandling::SjLj:
+    // SjLj piggy-backs on dwarf for this bit. The cleanups done apply to both
+    // Dwarf EH prepare needs to be run after SjLj prepare. Otherwise,
+    // catch info can get misplaced when a selector ends up more than one block
+    // removed from the parent invoke(s). This could happen when a landing
+    // pad is shared by multiple invokes and is also a target of a normal
+    // edge from elsewhere.
+    addPass(createSjLjEHPreparePass(TM));
+    LLVM_FALLTHROUGH;
+  case ExceptionHandling::DwarfCFI:
+  case ExceptionHandling::ARM:
+  case ExceptionHandling::AIX:
+    addPass(createDwarfEHPass(getOptLevel()));
+    break;
+  case ExceptionHandling::WinEH:
+    // We support using both GCC-style and MSVC-style exceptions on Windows, so
+    // add both preparation passes. Each pass will only actually run if it
+    // recognizes the personality function.
+    addPass(createWinEHPass());
+    addPass(createDwarfEHPass(getOptLevel()));
+    break;
+  case ExceptionHandling::Wasm:
+    // Wasm EH uses Windows EH instructions, but it does not need to demote PHIs
+    // on catchpads and cleanuppads because it does not outline them into
+    // funclets. Catchswitch blocks are not lowered in SelectionDAG, so we
+    // should remove PHIs there.
+    addPass(createWinEHPass(/*DemoteCatchSwitchPHIOnly=*/false));
+    addPass(createWasmEHPass());
+    break;
+  case ExceptionHandling::None:
+    addPass(createLowerInvokePass());
+
+    // The lower invoke pass may create unreachable code. Remove it.
+    addPass(createUnreachableBlockEliminationPass());
+    break;
+  }
+}
+
+/// Add pass to prepare the LLVM IR for code generation. This should be done
+/// before exception handling preparation passes.
+void TargetPassConfig::addCodeGenPrepare() {
+  if (getOptLevel() != CodeGenOpt::None && !DisableCGP)
+    addPass(createCodeGenPreparePass());
+}
+
+/// Add common passes that perform LLVM IR to IR transforms in preparation for
+/// instruction selection.
+void TargetPassConfig::addISelPrepare() {
+  addPreISel();
+
+  // Force codegen to run according to the callgraph.
+  if (requiresCodeGenSCCOrder())
+    addPass(new DummyCGSCCPass);
+
+  // Add both the safe stack and the stack protection passes: each of them will
+  // only protect functions that have corresponding attributes.
+  addPass(createSafeStackPass());
+  addPass(createStackProtectorPass());
+
+  if (PrintISelInput)
+    addPass(createPrintFunctionPass(
+        dbgs(), "\n\n*** Final LLVM Code input to ISel ***\n"));
+
+  // All passes which modify the LLVM IR are now complete; run the verifier
+  // to ensure that the IR is valid.
+  if (!DisableVerify)
+    addPass(createVerifierPass());
+}
+
+bool TargetPassConfig::addCoreISelPasses() {
+  // Enable FastISel with -fast-isel, but allow that to be overridden.
+  TM->setO0WantsFastISel(EnableFastISelOption != cl::BOU_FALSE);
+
+  // Determine an instruction selector.
+  enum class SelectorType { SelectionDAG, FastISel, GlobalISel };
+  SelectorType Selector;
+
+  if (EnableFastISelOption == cl::BOU_TRUE)
+    Selector = SelectorType::FastISel;
+  else if (EnableGlobalISelOption == cl::BOU_TRUE ||
+           (TM->Options.EnableGlobalISel &&
+            EnableGlobalISelOption != cl::BOU_FALSE))
+    Selector = SelectorType::GlobalISel;
+  else if (TM->getOptLevel() == CodeGenOpt::None && TM->getO0WantsFastISel())
+    Selector = SelectorType::FastISel;
+  else
+    Selector = SelectorType::SelectionDAG;
+
+  // Set consistently TM->Options.EnableFastISel and EnableGlobalISel.
+  if (Selector == SelectorType::FastISel) {
+    TM->setFastISel(true);
+    TM->setGlobalISel(false);
+  } else if (Selector == SelectorType::GlobalISel) {
+    TM->setFastISel(false);
+    TM->setGlobalISel(true);
+  }
+
+  // FIXME: Injecting into the DAGISel pipeline seems to cause issues with
+  //        analyses needing to be re-run. This can result in being unable to
+  //        schedule passes (particularly with 'Function Alias Analysis
+  //        Results'). It's not entirely clear why but AFAICT this seems to be
+  //        due to one FunctionPassManager not being able to use analyses from a
+  //        previous one. As we're injecting a ModulePass we break the usual
+  //        pass manager into two. GlobalISel with the fallback path disabled
+  //        and -run-pass seem to be unaffected. The majority of GlobalISel
+  //        testing uses -run-pass so this probably isn't too bad.
+  SaveAndRestore<bool> SavedDebugifyIsSafe(DebugifyIsSafe);
+  if (Selector != SelectorType::GlobalISel || !isGlobalISelAbortEnabled())
+    DebugifyIsSafe = false;
+
+  // Add instruction selector passes.
+  if (Selector == SelectorType::GlobalISel) {
+    SaveAndRestore<bool> SavedAddingMachinePasses(AddingMachinePasses, true);
+    if (addIRTranslator())
+      return true;
+
+    addPreLegalizeMachineIR();
+
+    if (addLegalizeMachineIR())
+      return true;
+
+    // Before running the register bank selector, ask the target if it
+    // wants to run some passes.
+    addPreRegBankSelect();
+
+    if (addRegBankSelect())
+      return true;
+
+    addPreGlobalInstructionSelect();
+
+    if (addGlobalInstructionSelect())
+      return true;
+
+    // Pass to reset the MachineFunction if the ISel failed.
+    addPass(createResetMachineFunctionPass(
+        reportDiagnosticWhenGlobalISelFallback(), isGlobalISelAbortEnabled()));
+
+    // Provide a fallback path when we do not want to abort on
+    // not-yet-supported input.
+    if (!isGlobalISelAbortEnabled() && addInstSelector())
+      return true;
+
+  } else if (addInstSelector())
+    return true;
+
+  // Expand pseudo-instructions emitted by ISel. Don't run the verifier before
+  // FinalizeISel.
+  addPass(&FinalizeISelID);
+
+  // Print the instruction selected machine code...
+  printAndVerify("After Instruction Selection");
+
+  return false;
+}
+
+bool TargetPassConfig::addISelPasses() {
+  if (TM->useEmulatedTLS())
+    addPass(createLowerEmuTLSPass());
+
+  addPass(createPreISelIntrinsicLoweringPass());
+  PM->add(createTargetTransformInfoWrapperPass(TM->getTargetIRAnalysis()));
+  addIRPasses();
+  addCodeGenPrepare();
+  addPassesToHandleExceptions();
+  addISelPrepare();
+
+  return addCoreISelPasses();
+}
+
+/// -regalloc=... command line option.
+static FunctionPass *useDefaultRegisterAllocator() { return nullptr; }
+static cl::opt<RegisterRegAlloc::FunctionPassCtor, false,
+               RegisterPassParser<RegisterRegAlloc>>
+    RegAlloc("regalloc", cl::Hidden, cl::init(&useDefaultRegisterAllocator),
+             cl::desc("Register allocator to use"));
+
+/// Add the complete set of target-independent postISel code generator passes.
+///
+/// This can be read as the standard order of major LLVM CodeGen stages. Stages
+/// with nontrivial configuration or multiple passes are broken out below in
+/// add%Stage routines.
+///
+/// Any TargetPassConfig::addXX routine may be overriden by the Target. The
+/// addPre/Post methods with empty header implementations allow injecting
+/// target-specific fixups just before or after major stages. Additionally,
+/// targets have the flexibility to change pass order within a stage by
+/// overriding default implementation of add%Stage routines below. Each
+/// technique has maintainability tradeoffs because alternate pass orders are
+/// not well supported. addPre/Post works better if the target pass is easily
+/// tied to a common pass. But if it has subtle dependencies on multiple passes,
+/// the target should override the stage instead.
+///
+/// TODO: We could use a single addPre/Post(ID) hook to allow pass injection
+/// before/after any target-independent pass. But it's currently overkill.
+void TargetPassConfig::addMachinePasses() {
+  AddingMachinePasses = true;
+
+  // Add passes that optimize machine instructions in SSA form.
+  if (getOptLevel() != CodeGenOpt::None) {
+    addMachineSSAOptimization();
+  } else {
+    // If the target requests it, assign local variables to stack slots relative
+    // to one another and simplify frame index references where possible.
+    addPass(&LocalStackSlotAllocationID);
+  }
+
+  if (TM->Options.EnableIPRA)
+    addPass(createRegUsageInfoPropPass());
+
+  // Run pre-ra passes.
+  addPreRegAlloc();
+
+  // Debugifying the register allocator passes seems to provoke some
+  // non-determinism that affects CodeGen and there doesn't seem to be a point
+  // where it becomes safe again so stop debugifying here.
+  DebugifyIsSafe = false;
+
+  // Add a FSDiscriminator pass right before RA, so that we could get
+  // more precise SampleFDO profile for RA.
+  if (EnableFSDiscriminator) {
+    addPass(createMIRAddFSDiscriminatorsPass(
+        sampleprof::FSDiscriminatorPass::Pass1));
+    const std::string ProfileFile = getFSProfileFile(TM);
+    if (!ProfileFile.empty() && !DisableRAFSProfileLoader)
+      addPass(
+          createMIRProfileLoaderPass(ProfileFile, getFSRemappingFile(TM),
+                                     sampleprof::FSDiscriminatorPass::Pass1));
+  }
+
+  // Run register allocation and passes that are tightly coupled with it,
+  // including phi elimination and scheduling.
+  if (getOptimizeRegAlloc())
+    addOptimizedRegAlloc();
+  else
+    addFastRegAlloc();
+
+  // Run post-ra passes.
+  addPostRegAlloc();
+
+  addPass(&RemoveRedundantDebugValuesID);
+
+  addPass(&FixupStatepointCallerSavedID);
+
+  // Insert prolog/epilog code.  Eliminate abstract frame index references...
+  if (getOptLevel() != CodeGenOpt::None) {
+    addPass(&PostRAMachineSinkingID);
+    addPass(&ShrinkWrapID);
+  }
+
+  // Prolog/Epilog inserter needs a TargetMachine to instantiate. But only
+  // do so if it hasn't been disabled, substituted, or overridden.
+  if (!isPassSubstitutedOrOverridden(&PrologEpilogCodeInserterID))
+      addPass(createPrologEpilogInserterPass());
+
+  /// Add passes that optimize machine instructions after register allocation.
+  if (getOptLevel() != CodeGenOpt::None)
+    addMachineLateOptimization();
+
+  // Expand pseudo instructions before second scheduling pass.
+  addPass(&ExpandPostRAPseudosID);
+
+  // Run pre-sched2 passes.
+  addPreSched2();
+
+  if (EnableImplicitNullChecks)
+    addPass(&ImplicitNullChecksID);
+
+  // Second pass scheduler.
+  // Let Target optionally insert this pass by itself at some other
+  // point.
+  if (getOptLevel() != CodeGenOpt::None &&
+      !TM->targetSchedulesPostRAScheduling()) {
+    if (MISchedPostRA)
+      addPass(&PostMachineSchedulerID);
+    else
+      addPass(&PostRASchedulerID);
+  }
+
+  // GC
+  if (addGCPasses()) {
+    if (PrintGCInfo)
+      addPass(createGCInfoPrinter(dbgs()));
+  }
+
+  // Basic block placement.
+  if (getOptLevel() != CodeGenOpt::None)
+    addBlockPlacement();
+
+  // Insert before XRay Instrumentation.
+  addPass(&FEntryInserterID);
+
+  addPass(&XRayInstrumentationID);
+  addPass(&PatchableFunctionID);
+
+  if (EnableFSDiscriminator && !FSNoFinalDiscrim)
+    // Add FS discriminators here so that all the instruction duplicates
+    // in different BBs get their own discriminators. With this, we can "sum"
+    // the SampleFDO counters instead of using MAX. This will improve the
+    // SampleFDO profile quality.
+    addPass(createMIRAddFSDiscriminatorsPass(
+        sampleprof::FSDiscriminatorPass::PassLast));
+
+  addPreEmitPass();
+
+  if (TM->Options.EnableIPRA)
+    // Collect register usage information and produce a register mask of
+    // clobbered registers, to be used to optimize call sites.
+    addPass(createRegUsageInfoCollector());
+
+  // FIXME: Some backends are incompatible with running the verifier after
+  // addPreEmitPass.  Maybe only pass "false" here for those targets?
+  addPass(&FuncletLayoutID);
+
+  addPass(&StackMapLivenessID);
+  addPass(&LiveDebugValuesID);
+
+  if (TM->Options.EnableMachineOutliner && getOptLevel() != CodeGenOpt::None &&
+      EnableMachineOutliner != RunOutliner::NeverOutline) {
+    bool RunOnAllFunctions =
+        (EnableMachineOutliner == RunOutliner::AlwaysOutline);
+    bool AddOutliner =
+        RunOnAllFunctions || TM->Options.SupportsDefaultOutlining;
+    if (AddOutliner)
+      addPass(createMachineOutlinerPass(RunOnAllFunctions));
+  }
+
+  // Machine function splitter uses the basic block sections feature. Both
+  // cannot be enabled at the same time. Basic block sections takes precedence.
+  // FIXME: In principle, BasicBlockSection::Labels and splitting can used
+  // together. Update this check once we have addressed any issues.
+  if (TM->getBBSectionsType() != llvm::BasicBlockSection::None) {
+    addPass(llvm::createBasicBlockSectionsPass(TM->getBBSectionsFuncListBuf()));
+  } else if (TM->Options.EnableMachineFunctionSplitter ||
+             EnableMachineFunctionSplitter) {
+    addPass(createMachineFunctionSplitterPass());
+  }
+
+  // Add passes that directly emit MI after all other MI passes.
+  addPreEmitPass2();
+
+  AddingMachinePasses = false;
+}
+
+/// Add passes that optimize machine instructions in SSA form.
+void TargetPassConfig::addMachineSSAOptimization() {
+  // Pre-ra tail duplication.
+  addPass(&EarlyTailDuplicateID);
+
+  // Optimize PHIs before DCE: removing dead PHI cycles may make more
+  // instructions dead.
+  addPass(&OptimizePHIsID);
+
+  // This pass merges large allocas. StackSlotColoring is a different pass
+  // which merges spill slots.
+  addPass(&StackColoringID);
+
+  // If the target requests it, assign local variables to stack slots relative
+  // to one another and simplify frame index references where possible.
+  addPass(&LocalStackSlotAllocationID);
+
+  // With optimization, dead code should already be eliminated. However
+  // there is one known exception: lowered code for arguments that are only
+  // used by tail calls, where the tail calls reuse the incoming stack
+  // arguments directly (see t11 in test/CodeGen/X86/sibcall.ll).
+  addPass(&DeadMachineInstructionElimID);
+
+  // Allow targets to insert passes that improve instruction level parallelism,
+  // like if-conversion. Such passes will typically need dominator trees and
+  // loop info, just like LICM and CSE below.
+  addILPOpts();
+
+  addPass(&EarlyMachineLICMID);
+  addPass(&MachineCSEID);
+
+  addPass(&MachineSinkingID);
+
+  addPass(&PeepholeOptimizerID);
+  // Clean-up the dead code that may have been generated by peephole
+  // rewriting.
+  addPass(&DeadMachineInstructionElimID);
+}
+
+//===---------------------------------------------------------------------===//
+/// Register Allocation Pass Configuration
+//===---------------------------------------------------------------------===//
+
+bool TargetPassConfig::getOptimizeRegAlloc() const {
+  switch (OptimizeRegAlloc) {
+  case cl::BOU_UNSET: return getOptLevel() != CodeGenOpt::None;
+  case cl::BOU_TRUE:  return true;
+  case cl::BOU_FALSE: return false;
+  }
+  llvm_unreachable("Invalid optimize-regalloc state");
+}
+
+/// A dummy default pass factory indicates whether the register allocator is
+/// overridden on the command line.
+static llvm::once_flag InitializeDefaultRegisterAllocatorFlag;
+
+static RegisterRegAlloc
+defaultRegAlloc("default",
+                "pick register allocator based on -O option",
+                useDefaultRegisterAllocator);
+
+static void initializeDefaultRegisterAllocatorOnce() {
+  if (!RegisterRegAlloc::getDefault())
+    RegisterRegAlloc::setDefault(RegAlloc);
+}
+
+/// Instantiate the default register allocator pass for this target for either
+/// the optimized or unoptimized allocation path. This will be added to the pass
+/// manager by addFastRegAlloc in the unoptimized case or addOptimizedRegAlloc
+/// in the optimized case.
+///
+/// A target that uses the standard regalloc pass order for fast or optimized
+/// allocation may still override this for per-target regalloc
+/// selection. But -regalloc=... always takes precedence.
+FunctionPass *TargetPassConfig::createTargetRegisterAllocator(bool Optimized) {
+  if (Optimized)
+    return createGreedyRegisterAllocator();
+  else
+    return createFastRegisterAllocator();
+}
+
+/// Find and instantiate the register allocation pass requested by this target
+/// at the current optimization level.  Different register allocators are
+/// defined as separate passes because they may require different analysis.
+///
+/// This helper ensures that the regalloc= option is always available,
+/// even for targets that override the default allocator.
+///
+/// FIXME: When MachinePassRegistry register pass IDs instead of function ptrs,
+/// this can be folded into addPass.
+FunctionPass *TargetPassConfig::createRegAllocPass(bool Optimized) {
+  // Initialize the global default.
+  llvm::call_once(InitializeDefaultRegisterAllocatorFlag,
+                  initializeDefaultRegisterAllocatorOnce);
+
+  RegisterRegAlloc::FunctionPassCtor Ctor = RegisterRegAlloc::getDefault();
+  if (Ctor != useDefaultRegisterAllocator)
+    return Ctor();
+
+  // With no -regalloc= override, ask the target for a regalloc pass.
+  return createTargetRegisterAllocator(Optimized);
+}
+
+bool TargetPassConfig::addRegAssignAndRewriteFast() {
+  if (RegAlloc != (RegisterRegAlloc::FunctionPassCtor)&useDefaultRegisterAllocator &&
+      RegAlloc != (RegisterRegAlloc::FunctionPassCtor)&createFastRegisterAllocator)
+    report_fatal_error("Must use fast (default) register allocator for unoptimized regalloc.");
+
+  addPass(createRegAllocPass(false));
+
+  // Allow targets to change the register assignments after
+  // fast register allocation.
+  addPostFastRegAllocRewrite();
+  return true;
+}
+
+bool TargetPassConfig::addRegAssignAndRewriteOptimized() {
+  // Add the selected register allocation pass.
+  addPass(createRegAllocPass(true));
+
+  // Allow targets to change the register assignments before rewriting.
+  addPreRewrite();
+
+  // Finally rewrite virtual registers.
+  addPass(&VirtRegRewriterID);
+
+  // Regalloc scoring for ML-driven eviction - noop except when learning a new
+  // eviction policy.
+  addPass(createRegAllocScoringPass());
+  return true;
+}
+
+/// Return true if the default global register allocator is in use and
+/// has not be overriden on the command line with '-regalloc=...'
+bool TargetPassConfig::usingDefaultRegAlloc() const {
+  return RegAlloc.getNumOccurrences() == 0;
+}
+
+/// Add the minimum set of target-independent passes that are required for
+/// register allocation. No coalescing or scheduling.
+void TargetPassConfig::addFastRegAlloc() {
+  addPass(&PHIEliminationID);
+  addPass(&TwoAddressInstructionPassID);
+
+  addRegAssignAndRewriteFast();
+}
+
+/// Add standard target-independent passes that are tightly coupled with
+/// optimized register allocation, including coalescing, machine instruction
+/// scheduling, and register allocation itself.
+void TargetPassConfig::addOptimizedRegAlloc() {
+  addPass(&DetectDeadLanesID);
+
+  addPass(&ProcessImplicitDefsID);
+
+  // LiveVariables currently requires pure SSA form.
+  //
+  // FIXME: Once TwoAddressInstruction pass no longer uses kill flags,
+  // LiveVariables can be removed completely, and LiveIntervals can be directly
+  // computed. (We still either need to regenerate kill flags after regalloc, or
+  // preferably fix the scavenger to not depend on them).
+  // FIXME: UnreachableMachineBlockElim is a dependant pass of LiveVariables.
+  // When LiveVariables is removed this has to be removed/moved either.
+  // Explicit addition of UnreachableMachineBlockElim allows stopping before or
+  // after it with -stop-before/-stop-after.
+  addPass(&UnreachableMachineBlockElimID);
+  addPass(&LiveVariablesID);
+
+  // Edge splitting is smarter with machine loop info.
+  addPass(&MachineLoopInfoID);
+  addPass(&PHIEliminationID);
+
+  // Eventually, we want to run LiveIntervals before PHI elimination.
+  if (EarlyLiveIntervals)
+    addPass(&LiveIntervalsID);
+
+  addPass(&TwoAddressInstructionPassID);
+  addPass(&RegisterCoalescerID);
+
+  // The machine scheduler may accidentally create disconnected components
+  // when moving subregister definitions around, avoid this by splitting them to
+  // separate vregs before. Splitting can also improve reg. allocation quality.
+  addPass(&RenameIndependentSubregsID);
+
+  // PreRA instruction scheduling.
+  addPass(&MachineSchedulerID);
+
+  if (addRegAssignAndRewriteOptimized()) {
+    // Perform stack slot coloring and post-ra machine LICM.
+    addPass(&StackSlotColoringID);
+
+    // Allow targets to expand pseudo instructions depending on the choice of
+    // registers before MachineCopyPropagation.
+    addPostRewrite();
+
+    // Copy propagate to forward register uses and try to eliminate COPYs that
+    // were not coalesced.
+    addPass(&MachineCopyPropagationID);
+
+    // Run post-ra machine LICM to hoist reloads / remats.
+    //
+    // FIXME: can this move into MachineLateOptimization?
+    addPass(&MachineLICMID);
+  }
+}
+
+//===---------------------------------------------------------------------===//
+/// Post RegAlloc Pass Configuration
+//===---------------------------------------------------------------------===//
+
+/// Add passes that optimize machine instructions after register allocation.
+void TargetPassConfig::addMachineLateOptimization() {
+  // Branch folding must be run after regalloc and prolog/epilog insertion.
+  addPass(&BranchFolderPassID);
+
+  // Tail duplication.
+  // Note that duplicating tail just increases code size and degrades
+  // performance for targets that require Structured Control Flow.
+  // In addition it can also make CFG irreducible. Thus we disable it.
+  if (!TM->requiresStructuredCFG())
+    addPass(&TailDuplicateID);
+
+  // Copy propagation.
+  addPass(&MachineCopyPropagationID);
+}
+
+/// Add standard GC passes.
+bool TargetPassConfig::addGCPasses() {
+  addPass(&GCMachineCodeAnalysisID);
+  return true;
+}
+
+/// Add standard basic block placement passes.
+void TargetPassConfig::addBlockPlacement() {
+  if (EnableFSDiscriminator) {
+    addPass(createMIRAddFSDiscriminatorsPass(
+        sampleprof::FSDiscriminatorPass::Pass2));
+    const std::string ProfileFile = getFSProfileFile(TM);
+    if (!ProfileFile.empty() && !DisableLayoutFSProfileLoader)
+      addPass(
+          createMIRProfileLoaderPass(ProfileFile, getFSRemappingFile(TM),
+                                     sampleprof::FSDiscriminatorPass::Pass2));
+  }
+  if (addPass(&MachineBlockPlacementID)) {
+    // Run a separate pass to collect block placement statistics.
+    if (EnableBlockPlacementStats)
+      addPass(&MachineBlockPlacementStatsID);
+  }
+}
+
+//===---------------------------------------------------------------------===//
+/// GlobalISel Configuration
+//===---------------------------------------------------------------------===//
+bool TargetPassConfig::isGlobalISelAbortEnabled() const {
+  return TM->Options.GlobalISelAbort == GlobalISelAbortMode::Enable;
+}
+
+bool TargetPassConfig::reportDiagnosticWhenGlobalISelFallback() const {
+  return TM->Options.GlobalISelAbort == GlobalISelAbortMode::DisableWithDiag;
+}
+
+bool TargetPassConfig::isGISelCSEEnabled() const {
+  return true;
+}
+
+std::unique_ptr<CSEConfigBase> TargetPassConfig::getCSEConfig() const {
+  return std::make_unique<CSEConfigBase>();
+}