CodeGen: Don't lazily construct MachineFunctionInfo

[arsenm]

Summary

This fixes what I consider to be an API flaw I've tripped over
multiple times. The point this is constructed isn't well defined, so
depending on where this is first called, you can conclude different
information based on the MachineFunction. For example, the AMDGPU
implementation inspected the MachineFrameInfo on construction for the
stack objects and if the frame has calls. This kind of worked in
SelectionDAG which visited all allocas up front, but broke in
GlobalISel which hasn't visited any of the IR when arguments are
lowered.

I've run into similar problems before with the MIR parser and trying
to make use of other MachineFunction fields, so I think it's best to
just categorically disallow dependency on the MachineFunction state in
the constructor and to always construct this at the same time as the
MachineFunction itself.

A missing feature I still could use is a way to access an custom
analysis pass on the IR here.

I'll update the rest of the targets after initial comments

[arsenm]

ping

[arsenm]

ping

[scott.linder]

I'm not comfortable accepting this as I'm not familiar with the code, but it LGTM. The pattern of constructing the MachineFunctionInfo lazily on the first call to getInfo seems very non-obvious; it isn't implied by the name and it isn't described in the doc comment. As you note it is also particularly dangerous if it depends on values which are mutable over the life of the MachineFunction.

[arsenm]

ping

[arsenm]

ping

[aemerson]

Is there no reasonable default MFI we can create?

[arsenm]

In D80249#2093462, @aemerson wrote:

Is there no reasonable default MFI we can create?

The point of it is to carry target specific information, so I don't think anything would make sense to be there by default.

[thegameg]

I think there are a bunch of APIs that have this issue, so I think the general direction is good. I don't expect this to have any memory/compile-time impact, since probably even the smallest input will create the MachineFunctionInfo anyway. Was this the initial intention of having it build lazily?

So you should probably go ahead, I doubt anyone has any objections after all this time.

Nit: maybe commit the changes from AMDGPUMachineFunction.cpp separately

[kparzysz]

A "create" function shouldn't return a null pointer. I think there should be a default MFI that has nothing in it, and it would be what the createMachineFunctionInfo returns a pointer to in the absence of overrides. It could even be statically allocated since is has no members:

virtual MachineFunctionInfo *
createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
                          const TargetSubtargetInfo *STI) const {
  static MachineFunctionInfo default;
  return &default;
}

Edit: fix indentation in the code

[arsenm]

In D80249#2107516, @kparzysz wrote:

A "create" function shouldn't return a null pointer. I think there should be a default MFI that has nothing in it, and it would be what the createMachineFunctionInfo returns a pointer to in the absence of overrides. It could even be statically allocated since is has no members:

virtual MachineFunctionInfo *
createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
                          const TargetSubtargetInfo *STI) const {
  static MachineFunctionInfo default;
  return &default;
}

Edit: fix indentation in the code

Alternatively, make it pure virtual or make it llvm_unreachable?

[arsenm]

Updated rest of the targets

[arsenm]

In D80249#2107516, @kparzysz wrote:

A "create" function shouldn't return a null pointer. I think there should be a default MFI that has nothing in it, and it would be what the createMachineFunctionInfo returns a pointer to in the absence of overrides. It could even be statically allocated since is has no members:

virtual MachineFunctionInfo *
createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
                          const TargetSubtargetInfo *STI) const {
  static MachineFunctionInfo default;
  return &default;
}

Edit: fix indentation in the code

I did try to do this, but it didn't work out. It introduces a dependence on CodeGen from Target. I don't think anywhere else uses this pattern to avoid overrides, and just returns null. I don't think this is really an issue in practice, since this is only ever called from target code

[aemerson]

In D80249#2109204, @arsenm wrote:

In D80249#2107516, @kparzysz wrote:

A "create" function shouldn't return a null pointer. I think there should be a default MFI that has nothing in it, and it would be what the createMachineFunctionInfo returns a pointer to in the absence of overrides. It could even be statically allocated since is has no members:

virtual MachineFunctionInfo *
createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
                          const TargetSubtargetInfo *STI) const {
  static MachineFunctionInfo default;
  return &default;
}

Edit: fix indentation in the code

Alternatively, make it pure virtual or make it llvm_unreachable?

This is ok with me.

[arsenm]

In D80249#2137666, @aemerson wrote:

In D80249#2109204, @arsenm wrote:

In D80249#2107516, @kparzysz wrote:

A "create" function shouldn't return a null pointer. I think there should be a default MFI that has nothing in it, and it would be what the createMachineFunctionInfo returns a pointer to in the absence of overrides. It could even be statically allocated since is has no members:

virtual MachineFunctionInfo *
createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
                          const TargetSubtargetInfo *STI) const {
  static MachineFunctionInfo default;
  return &default;
}

Edit: fix indentation in the code

Alternatively, make it pure virtual or make it llvm_unreachable?

This is ok with me.

As I mentioned in a previous comment, I think this ended up not working well. The dummy implementation I believe introduces build layer violations, and the pure virtual added more boilerplate to a couple of targets. Since this is only ever accessed from target code, I don't think there's much danger in using null here

[nhaehnle]

Do you really need to change the signature of MachineFunctionInfo::create? That seems orthogonal to the problem you're trying to solve, or perhaps a redundant solution.

The problem is: due to lazy construction and being able to refer to the MachineFunction, the state of the MachineFunctionInfo can have surprising accidental differences depending on when exactly it was created. There are two possible solutions:

1. Prevent the MachineFunctionInfo from accessing the MachineFunction.
2. Always create the MachineFunctionInfo in the same place.

This change does both, but either solution should be sufficient, and I personally find #1 counter-intuitive: it seems to me that the additional target-specific info about an object should be allowed to access that object.

[scott.linder]

In D80249#2156869, @nhaehnle wrote:

Do you really need to change the signature of MachineFunctionInfo::create? That seems orthogonal to the problem you're trying to solve, or perhaps a redundant solution.

The problem is: due to lazy construction and being able to refer to the MachineFunction, the state of the MachineFunctionInfo can have surprising accidental differences depending on when exactly it was created. There are two possible solutions:

1. Prevent the MachineFunctionInfo from accessing the MachineFunction.
2. Always create the MachineFunctionInfo in the same place.

This change does both, but either solution should be sufficient, and I personally find #1 counter-intuitive: it seems to me that the additional target-specific info about an object should be allowed to access that object.

What state in the MF is valid for the MFI to rely on at that well-defined point? If the MF is mutable, isn't the MFI potentially stale the moment the MF is mutated?

[arsenm]

In D80249#2156869, @nhaehnle wrote:

Do you really need to change the signature of MachineFunctionInfo::create? That seems orthogonal to the problem you're trying to solve, or perhaps a redundant solution.

The problem is: due to lazy construction and being able to refer to the MachineFunction, the state of the MachineFunctionInfo can have surprising accidental differences depending on when exactly it was created. There are two possible solutions:

1. Prevent the MachineFunctionInfo from accessing the MachineFunction.
2. Always create the MachineFunctionInfo in the same place.

This change does both, but either solution should be sufficient, and I personally find #1 counter-intuitive: it seems to me that the additional target-specific info about an object should be allowed to access that object.

You can't really do anything with the empty MachineFunction on construction. At the construction point, there isn't any information to access and it would always be a mistake to inspect it or make any construction decisions based on it (it would also be bad for the constructor to modify the MachineFunction).

[nhaehnle]

In D80249#2156889, @arsenm wrote:

In D80249#2156869, @nhaehnle wrote:

Do you really need to change the signature of MachineFunctionInfo::create? That seems orthogonal to the problem you're trying to solve, or perhaps a redundant solution.

The problem is: due to lazy construction and being able to refer to the MachineFunction, the state of the MachineFunctionInfo can have surprising accidental differences depending on when exactly it was created. There are two possible solutions:

1. Prevent the MachineFunctionInfo from accessing the MachineFunction.
2. Always create the MachineFunctionInfo in the same place.

This change does both, but either solution should be sufficient, and I personally find #1 counter-intuitive: it seems to me that the additional target-specific info about an object should be allowed to access that object.

You can't really do anything with the empty MachineFunction on construction. At the construction point, there isn't any information to access and it would always be a mistake to inspect it or make any construction decisions based on it (it would also be bad for the constructor to modify the MachineFunction).

MFI is mutable, and so referring back to the MachineFunction as part of the mutation is potentially something reasonable to do. So the point isn't to use data from the MachineFunction during construction of the MFI, but rather to allow the "child" object to have a backlink to its "parent".

[scott.linder]

In D80249#2158886, @nhaehnle wrote:

In D80249#2156889, @arsenm wrote:

In D80249#2156869, @nhaehnle wrote:

Do you really need to change the signature of MachineFunctionInfo::create? That seems orthogonal to the problem you're trying to solve, or perhaps a redundant solution.

The problem is: due to lazy construction and being able to refer to the MachineFunction, the state of the MachineFunctionInfo can have surprising accidental differences depending on when exactly it was created. There are two possible solutions:

1. Prevent the MachineFunctionInfo from accessing the MachineFunction.
2. Always create the MachineFunctionInfo in the same place.

This change does both, but either solution should be sufficient, and I personally find #1 counter-intuitive: it seems to me that the additional target-specific info about an object should be allowed to access that object.

You can't really do anything with the empty MachineFunction on construction. At the construction point, there isn't any information to access and it would always be a mistake to inspect it or make any construction decisions based on it (it would also be bad for the constructor to modify the MachineFunction).

MFI is mutable, and so referring back to the MachineFunction as part of the mutation is potentially something reasonable to do. So the point isn't to use data from the MachineFunction during construction of the MFI, but rather to allow the "child" object to have a backlink to its "parent".

As in, the bug is for an MFI implementation to "cache" properties of the MF (e.g. AMDGPU taking a snapshot of MF properties in the MFI constructor), because the MF is mutable and there is no mechanism to invalidate the cache?

[arsenm]

In D80249#2158886, @nhaehnle wrote:

In D80249#2156889, @arsenm wrote:

In D80249#2156869, @nhaehnle wrote:

Do you really need to change the signature of MachineFunctionInfo::create? That seems orthogonal to the problem you're trying to solve, or perhaps a redundant solution.

The problem is: due to lazy construction and being able to refer to the MachineFunction, the state of the MachineFunctionInfo can have surprising accidental differences depending on when exactly it was created. There are two possible solutions:

1. Prevent the MachineFunctionInfo from accessing the MachineFunction.
2. Always create the MachineFunctionInfo in the same place.

This change does both, but either solution should be sufficient, and I personally find #1 counter-intuitive: it seems to me that the additional target-specific info about an object should be allowed to access that object.

You can't really do anything with the empty MachineFunction on construction. At the construction point, there isn't any information to access and it would always be a mistake to inspect it or make any construction decisions based on it (it would also be bad for the constructor to modify the MachineFunction).

MFI is mutable, and so referring back to the MachineFunction as part of the mutation is potentially something reasonable to do. So the point isn't to use data from the MachineFunction during construction of the MFI, but rather to allow the "child" object to have a backlink to its "parent".

But you can just as well pass in the machine function in these cases. I don't think the minor convenience of not passing in the function is worth the footgun this gives you

[arsenm]

Rebase after once again running into issues caused by unclear construction time

[arsenm]

In D80249#2158886, @nhaehnle wrote:

MFI is mutable, and so referring back to the MachineFunction as part of the mutation is potentially something reasonable to do. So the point isn't to use data from the MachineFunction during construction of the MFI, but rather to allow the "child" object to have a backlink to its "parent".

MFI is always queried from the function itself, so there's no real context where you need the backlink. Having the MachineFunction in the constructor provides a huge footgun which I've had to fix the consequences of at least 5 different times. If you allow people to write their own quick and dirty machine analyses in the constructor, they will. Doing that at a random point causes confusion and hard to predict differences in target behavior.

[arsenm]

ping

[arsenm]

ping

[arsenm]

ping

[paquette]

Considering

1. Lazily constructing MFI is causing real pain, and makes it possible to write some silly bugs
2. There haven't been any comments on this in a considerable amount of time, implying there aren't any strong opinions
3. The drawback is that you have to type "MF" in some places

Right now, I think it would be good to just fix the existing footgun. I think it's probably okay to just land this?

[arsenm]

Rebase. Move the construction of MFI out of the MachineFunction constructor to support the llvm-reduce usecase. It's slightly ugly to have to set this in the MachineModuleInfo and ResetMachineFunctionPass; the alternative might be a flag to skip constructing it

[barannikov88]

Few nitpicks and LGTM.
Ran into this once or twice as well

llvm/include/llvm/CodeGen/MachineFunction.h

104

Should STI be also passed by reference (can it be null)?

llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.h

196

explicit is now redundant. (Here and in other backends.)

llvm/lib/Target/AArch64/AArch64TargetMachine.cpp

846

It would be natural to pass AArch64FunctionInfo here instead of TargetSubtargetInfo. Like in AMDGPU backend below.

llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp

21

Calling constructor without arguments does not seem necessary...

llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp

39

Passing GCNSubtarget instead of TargetSubtargetInfo would save a cast :)

[arsenm]

Avoid some casts

llvm/include/llvm/CodeGen/MachineFunction.h

104

getSubtargetImpl returns null by default, but not a whole lot of code bothers checking (e.g. the initial use when the function is constructed)

llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp

39

Fixed with more templates

[arsenm]

69e75ae695d9ef1360a2a1fbefd6e0e0456c3f7b

llvm/include/llvm/CodeGen/MachineFunction.h

 /// MachineFunction is destroyed.
 struct MachineFunctionInfo {
   virtual ~MachineFunctionInfo();
 
   /// Factory function: default behavior is to call new using the
   /// supplied allocator.
   ///
   /// This function can be overridden in a derive class.
-  template<typename Ty>
-  static Ty *create(BumpPtrAllocator &Allocator, MachineFunction &MF) {
-    return new (Allocator.Allocate<Ty>()) Ty(MF);
+  template <typename FuncInfoTy, typename SubtargetTy = TargetSubtargetInfo>
+  static FuncInfoTy *create(BumpPtrAllocator &Allocator, const Function &F,
+                            const SubtargetTy *STI) {
+    return new (Allocator.Allocate<FuncInfoTy>()) FuncInfoTy(F, STI);
   }
 
   template <typename Ty>
   static Ty *create(BumpPtrAllocator &Allocator, const Ty &MFI) {
     return new (Allocator.Allocate<Ty>()) Ty(MFI);
   }
 
   /// Make a functionally equivalent copy of this MachineFunctionInfo in \p MF.
public:
   const MachineFunctionProperties &getProperties() const { return Properties; }
   MachineFunctionProperties &getProperties() { return Properties; }
 
   /// getInfo - Keep track of various per-function pieces of information for
   /// backends that would like to do so.
   ///
   template<typename Ty>
   Ty *getInfo() {
-    if (!MFInfo)
-      MFInfo = Ty::template create<Ty>(Allocator, *this);
     return static_cast<Ty*>(MFInfo);
   }
 
   template<typename Ty>
   const Ty *getInfo() const {
-     return const_cast<MachineFunction*>(this)->getInfo<Ty>();
+    return static_cast<const Ty *>(MFInfo);
   }
 
   template <typename Ty> Ty *cloneInfo(const Ty &Old) {
     assert(!MFInfo);
     MFInfo = Ty::template create<Ty>(Allocator, Old);
     return static_cast<Ty *>(MFInfo);
   }
 
+  /// Initialize the target specific MachineFunctionInfo
+  void initTargetMachineFunctionInfo(const TargetSubtargetInfo &STI);
+
   MachineFunctionInfo *cloneInfoFrom(
       const MachineFunction &OrigMF,
       const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB) {
     assert(!MFInfo && "new function already has MachineFunctionInfo");
     if (!OrigMF.MFInfo)
       return nullptr;
     return OrigMF.MFInfo->clone(Allocator, *this, Src2DstMBB);
   }

llvm/include/llvm/Target/TargetMachine.h

 
 #ifndef LLVM_TARGET_TARGETMACHINE_H
 #define LLVM_TARGET_TARGETMACHINE_H
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Support/Allocator.h"
 #include "llvm/Support/CodeGen.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/PGOOptions.h"
 #include "llvm/Target/CGPassBuilderOption.h"
 #include "llvm/Target/TargetOptions.h"
 #include <optional>
 #include <string>
 #include <utility>

 class TargetSubtargetInfo;
 
 // The old pass manager infrastructure is hidden in a legacy namespace now.
 namespace legacy {
 class PassManagerBase;
 }
 using legacy::PassManagerBase;
 
+struct MachineFunctionInfo;
 namespace yaml {
 struct MachineFunctionInfo;
 }
 
 //===----------------------------------------------------------------------===//
 ///
 /// Primary interface to the complete machine description for the target
 /// machine.  All target-specific information should be accessible through this
public:
   /// target's TargetSubtargetInfo-derived member variable.
   virtual const TargetSubtargetInfo *getSubtargetImpl(const Function &) const {
     return nullptr;
   }
   virtual TargetLoweringObjectFile *getObjFileLowering() const {
     return nullptr;
   }
 
+  /// Create the target's instance of MachineFunctionInfo
+  virtual MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const {
+    return nullptr;
+  }
+
   /// Allocate and return a default initialized instance of the YAML
   /// representation for the MachineFunctionInfo.
   virtual yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const {
     return nullptr;
   }
 
   /// Allocate and initialize an instance of the YAML representation of the
   /// MachineFunctionInfo.

llvm/lib/CodeGen/MachineFunction.cpp

void MachineFunction::init() {
   Properties.set(MachineFunctionProperties::Property::IsSSA);
   Properties.set(MachineFunctionProperties::Property::TracksLiveness);
   if (STI->getRegisterInfo())
     RegInfo = new (Allocator) MachineRegisterInfo(this);
   else
     RegInfo = nullptr;
 
   MFInfo = nullptr;
+
   // We can realign the stack if the target supports it and the user hasn't
   // explicitly asked us not to.
   bool CanRealignSP = STI->getFrameLowering()->isStackRealignable() &&
                       !F.hasFnAttribute("no-realign-stack");
   FrameInfo = new (Allocator) MachineFrameInfo(
       getFnStackAlignment(STI, F), /*StackRealignable=*/CanRealignSP,
       /*ForcedRealign=*/CanRealignSP &&
           F.hasFnAttribute(Attribute::StackAlignment));
void MachineFunction::init() {
 
   assert(Target.isCompatibleDataLayout(getDataLayout()) &&
          "Can't create a MachineFunction using a Module with a "
          "Target-incompatible DataLayout attached\n");
 
   PSVManager = std::make_unique<PseudoSourceValueManager>(getTarget());
 }
 
+void MachineFunction::initTargetMachineFunctionInfo(
+    const TargetSubtargetInfo &STI) {
+  assert(!MFInfo && "MachineFunctionInfo already set");
+  MFInfo = Target.createMachineFunctionInfo(Allocator, F, &STI);
+}
+
 MachineFunction::~MachineFunction() {
   clear();
 }
 
 void MachineFunction::clear() {
   Properties.reset();
   // Don't call destructors on MachineInstr and MachineOperand. All of their
   // memory comes from the BumpPtrAllocator which is about to be purged.

llvm/lib/CodeGen/MachineModuleInfo.cpp

MachineFunction &MachineModuleInfo::getOrCreateMachineFunction(Function &F) {
 
   auto I = MachineFunctions.insert(
       std::make_pair(&F, std::unique_ptr<MachineFunction>()));
   MachineFunction *MF;
   if (I.second) {
     // No pre-existing machine function, create a new one.
     const TargetSubtargetInfo &STI = *TM.getSubtargetImpl(F);
     MF = new MachineFunction(F, TM, STI, NextFnNum++, *this);
+    MF->initTargetMachineFunctionInfo(STI);
     // Update the set entry.
     I.first->second.reset(MF);
   } else {
     MF = I.first->second.get();
   }
 
   LastRequest = &F;
   LastResult = MF;

llvm/lib/CodeGen/ResetMachineFunctionPass.cpp

bool runOnMachineFunction(MachineFunction &MF) override {
 
       if (MF.getProperties().hasProperty(
               MachineFunctionProperties::Property::FailedISel)) {
         if (AbortOnFailedISel)
           report_fatal_error("Instruction selection failed");
         LLVM_DEBUG(dbgs() << "Resetting: " << MF.getName() << '\n');
         ++NumFunctionsReset;
         MF.reset();
+        MF.initTargetMachineFunctionInfo(MF.getSubtarget());
+
         if (EmitFallbackDiag) {
           const Function &F = MF.getFunction();
           DiagnosticInfoISelFallback DiagFallback(F);
           F.getContext().diagnose(DiagFallback);
         }
         return true;
       }
       return false;

llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.h

 #include <optional>
 
 namespace llvm {
 
 namespace yaml {
 struct AArch64FunctionInfo;
 } // end namespace yaml
 
+class AArch64Subtarget;
 class MachineInstr;
 
 /// AArch64FunctionInfo - This class is derived from MachineFunctionInfo and
 /// contains private AArch64-specific information for each MachineFunction.
 class AArch64FunctionInfo final : public MachineFunctionInfo {
   /// Number of bytes of arguments this function has on the stack. If the callee
   /// is expected to restore the argument stack this should be a multiple of 16,
   /// all usable during a tail call.
class AArch64FunctionInfo final : public MachineFunctionInfo {
 
   /// True if the function need unwind information.
   mutable std::optional<bool> NeedsDwarfUnwindInfo;
 
   /// True if the function need asynchronous unwind information.
   mutable std::optional<bool> NeedsAsyncDwarfUnwindInfo;
 
 public:
-  explicit AArch64FunctionInfo(MachineFunction &MF);
+  AArch64FunctionInfo(const Function &F, const AArch64Subtarget *STI);
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   bool isSVECC() const { return IsSVECC; };
   void setIsSVECC(bool s) { IsSVECC = s; };

llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.cpp

static bool ShouldSignWithBKey(const Function &F, const AArch64Subtarget &STI) {
   }
 
   const StringRef Key =
       F.getFnAttribute("sign-return-address-key").getValueAsString();
   assert(Key.equals_insensitive("a_key") || Key.equals_insensitive("b_key"));
   return Key.equals_insensitive("b_key");
 }
 
-AArch64FunctionInfo::AArch64FunctionInfo(MachineFunction &MF) {
-  const Function &F = MF.getFunction();
-  const AArch64Subtarget &STI = MF.getSubtarget<AArch64Subtarget>();
-
+AArch64FunctionInfo::AArch64FunctionInfo(const Function &F,
+                                         const AArch64Subtarget *STI) {
   // If we already know that the function doesn't have a redzone, set
   // HasRedZone here.
   if (F.hasFnAttribute(Attribute::NoRedZone))
     HasRedZone = false;
   std::tie(SignReturnAddress, SignReturnAddressAll) = GetSignReturnAddress(F);
-  SignWithBKey = ShouldSignWithBKey(F, STI);
+  SignWithBKey = ShouldSignWithBKey(F, *STI);
   // TODO: skip functions that have no instrumented allocas for optimization
   IsMTETagged = F.hasFnAttribute(Attribute::SanitizeMemTag);
 
   if (!F.hasFnAttribute("branch-target-enforcement")) {
     if (const auto *BTE = mdconst::extract_or_null<ConstantInt>(
             F.getParent()->getModuleFlag("branch-target-enforcement")))
       BranchTargetEnforcement = BTE->getZExtValue();
     return;

llvm/lib/Target/AArch64/AArch64TargetMachine.h

public:
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   TargetLoweringObjectFile* getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override;
   yaml::MachineFunctionInfo *
   convertFuncInfoToYAML(const MachineFunction &MF) const override;
   bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &,
                                 PerFunctionMIParsingState &PFS,
                                 SMDiagnostic &Error,
                                 SMRange &SourceRange) const override;
 

llvm/lib/Target/AArch64/AArch64TargetMachine.cpp

 }
 
 void AArch64PassConfig::addPreEmitPass2() {
   // SVE bundles move prefixes with destructive operations. BLR_RVMARKER pseudo
   // instructions are lowered to bundles as well.
   addPass(createUnpackMachineBundles(nullptr));
 }
 
+MachineFunctionInfo *AArch64TargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return AArch64FunctionInfo::create<AArch64FunctionInfo>(
+      Allocator, F, static_cast<const AArch64Subtarget *>(STI));
+}
+
 yaml::MachineFunctionInfo *
 AArch64TargetMachine::createDefaultFuncInfoYAML() const {
   return new yaml::AArch64FunctionInfo();
 }
 
 yaml::MachineFunctionInfo *
 AArch64TargetMachine::convertFuncInfoToYAML(const MachineFunction &MF) const {
   const auto *MFI = MF.getInfo<AArch64FunctionInfo>();

llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.h

 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalValue.h"
 #include "llvm/IR/GlobalVariable.h"
 
 namespace llvm {
 
+class AMDGPUSubtarget;
+class GCNSubtarget;
+
 class AMDGPUMachineFunction : public MachineFunctionInfo {
   /// A map to keep track of local memory objects and their offsets within the
   /// local memory space.
   SmallDenseMap<const GlobalValue *, unsigned, 4> LocalMemoryObjects;
 
 protected:
   uint64_t ExplicitKernArgSize = 0; // Cache for this.
   Align MaxKernArgAlign;        // Cache for this.
protected:
 
   // Function may be memory bound.
   bool MemoryBound = false;
 
   // Kernel may need limited waves per EU for better performance.
   bool WaveLimiter = false;
 
 public:
-  AMDGPUMachineFunction(const MachineFunction &MF);
+  AMDGPUMachineFunction(const Function &F, const AMDGPUSubtarget &ST);
 
   uint64_t getExplicitKernArgSize() const {
     return ExplicitKernArgSize;
   }
 
   Align getMaxKernArgAlign() const { return MaxKernArgAlign; }
 
   uint32_t getLDSSize() const {

llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp

 #include "AMDGPUPerfHintAnalysis.h"
 #include "AMDGPUSubtarget.h"
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/Target/TargetMachine.h"
 
 using namespace llvm;
 
-AMDGPUMachineFunction::AMDGPUMachineFunction(const MachineFunction &MF)
-    : IsEntryFunction(AMDGPU::isEntryFunctionCC(
-                                  MF.getFunction().getCallingConv())),
+AMDGPUMachineFunction::AMDGPUMachineFunction(const Function &F,
+                                             const AMDGPUSubtarget &ST)
+    : IsEntryFunction(AMDGPU::isEntryFunctionCC(F.getCallingConv())),
       IsModuleEntryFunction(
-          AMDGPU::isModuleEntryFunctionCC(MF.getFunction().getCallingConv())),
-      NoSignedZerosFPMath(MF.getTarget().Options.NoSignedZerosFPMath) {
-  const AMDGPUSubtarget &ST = AMDGPUSubtarget::get(MF);
+          AMDGPU::isModuleEntryFunctionCC(F.getCallingConv())),
+      NoSignedZerosFPMath(false) {
 
   // FIXME: Should initialize KernArgSize based on ExplicitKernelArgOffset,
   // except reserved size is not correctly aligned.
-  const Function &F = MF.getFunction();
 
   Attribute MemBoundAttr = F.getFnAttribute("amdgpu-memory-bound");
   MemoryBound = MemBoundAttr.getValueAsBool();
 
   Attribute WaveLimitAttr = F.getFnAttribute("amdgpu-wave-limiter");
   WaveLimiter = WaveLimitAttr.getValueAsBool();
 
   // FIXME: How is this attribute supposed to interact with statically known
   // global sizes?
   StringRef S = F.getFnAttribute("amdgpu-gds-size").getValueAsString();
   if (!S.empty())
     S.consumeInteger(0, GDSSize);
 
   // Assume the attribute allocates before any known GDS globals.
   StaticGDSSize = GDSSize;
 
   CallingConv::ID CC = F.getCallingConv();
   if (CC == CallingConv::AMDGPU_KERNEL || CC == CallingConv::SPIR_KERNEL)
     ExplicitKernArgSize = ST.getExplicitKernArgSize(F, MaxKernArgAlign);
+
+  // FIXME: Shouldn't be target specific
+  Attribute NSZAttr = F.getFnAttribute("no-signed-zeros-fp-math");
+  NoSignedZerosFPMath =
+      NSZAttr.isStringAttribute() && NSZAttr.getValueAsString() == "true";
 }
 
 unsigned AMDGPUMachineFunction::allocateLDSGlobal(const DataLayout &DL,
                                                   const GlobalVariable &GV,
                                                   Align Trailing) {
   auto Entry = LocalMemoryObjects.insert(std::pair(&GV, 0));
   if (!Entry.second)
     return Entry.first->second;

llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.h

public:
   const TargetSubtargetInfo *getSubtargetImpl(const Function &) const override;
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   bool useIPRA() const override {
     return true;
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override;
   yaml::MachineFunctionInfo *
   convertFuncInfoToYAML(const MachineFunction &MF) const override;
   bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &,
                                 PerFunctionMIParsingState &PFS,
                                 SMDiagnostic &Error,
                                 SMRange &SourceRange) const override;
 };

llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp

 #include "AMDGPUIGroupLP.h"
 #include "AMDGPUMacroFusion.h"
 #include "AMDGPUTargetObjectFile.h"
 #include "AMDGPUTargetTransformInfo.h"
 #include "GCNIterativeScheduler.h"
 #include "GCNSchedStrategy.h"
 #include "GCNVOPDUtils.h"
 #include "R600.h"
+#include "R600MachineFunctionInfo.h"
 #include "R600TargetMachine.h"
 #include "SIMachineFunctionInfo.h"
 #include "SIMachineScheduler.h"
 #include "TargetInfo/AMDGPUTargetInfo.h"
 #include "Utils/AMDGPUBaseInfo.h"
 #include "llvm/Analysis/CGSCCPassManager.h"
 #include "llvm/CodeGen/GlobalISel/CSEInfo.h"
 #include "llvm/CodeGen/GlobalISel/IRTranslator.h"
AMDGPUPassConfig::createMachineScheduler(MachineSchedContext *C) const {
   const GCNSubtarget &ST = C->MF->getSubtarget<GCNSubtarget>();
   ScheduleDAGMILive *DAG = createGenericSchedLive(C);
   DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
   if (ST.shouldClusterStores())
     DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
   return DAG;
 }
 
+MachineFunctionInfo *R600TargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return R600MachineFunctionInfo::create<R600MachineFunctionInfo>(
+      Allocator, F, static_cast<const R600Subtarget *>(STI));
+}
+
 //===----------------------------------------------------------------------===//
 // GCN Pass Setup
 //===----------------------------------------------------------------------===//
 
 ScheduleDAGInstrs *GCNPassConfig::createMachineScheduler(
   MachineSchedContext *C) const {
   const GCNSubtarget &ST = C->MF->getSubtarget<GCNSubtarget>();
   if (ST.enableSIScheduler())
void GCNPassConfig::addPreEmitPass() {
 
   addPass(&BranchRelaxationPassID);
 }
 
 TargetPassConfig *GCNTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new GCNPassConfig(*this, PM);
 }
 
+MachineFunctionInfo *GCNTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return SIMachineFunctionInfo::create<SIMachineFunctionInfo>(
+      Allocator, F, static_cast<const GCNSubtarget *>(STI));
+}
+
 yaml::MachineFunctionInfo *GCNTargetMachine::createDefaultFuncInfoYAML() const {
   return new yaml::SIMachineFunctionInfo();
 }
 
 yaml::MachineFunctionInfo *
 GCNTargetMachine::convertFuncInfoToYAML(const MachineFunction &MF) const {
   const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
   return new yaml::SIMachineFunctionInfo(
-      *MFI, *MF.getSubtarget().getRegisterInfo(), MF);
+      *MFI, *MF.getSubtarget<GCNSubtarget>().getRegisterInfo(), MF);
 }
 
 bool GCNTargetMachine::parseMachineFunctionInfo(
     const yaml::MachineFunctionInfo &MFI_, PerFunctionMIParsingState &PFS,
     SMDiagnostic &Error, SMRange &SourceRange) const {
   const yaml::SIMachineFunctionInfo &YamlMFI =
       static_cast<const yaml::SIMachineFunctionInfo &>(MFI_);
   MachineFunction &MF = PFS.MF;

llvm/lib/Target/AMDGPU/R600MachineFunctionInfo.h

 
 #ifndef LLVM_LIB_TARGET_AMDGPU_R600MACHINEFUNCTIONINFO_H
 #define LLVM_LIB_TARGET_AMDGPU_R600MACHINEFUNCTIONINFO_H
 
 #include "AMDGPUMachineFunction.h"
 
 namespace llvm {
 
+class R600Subtarget;
+
 class R600MachineFunctionInfo final : public AMDGPUMachineFunction {
 public:
-  R600MachineFunctionInfo(const MachineFunction &MF);
+  R600MachineFunctionInfo(const Function &F, const R600Subtarget *STI);
   unsigned CFStackSize;
 };
 
 } // End llvm namespace
 
 #endif

llvm/lib/Target/AMDGPU/R600MachineFunctionInfo.cpp

 //===-- R600MachineFunctionInfo.cpp - R600 Machine Function Info-*- C++ -*-===//
 //
 // 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
 //
 /// \file
 //===----------------------------------------------------------------------===//
 
 #include "R600MachineFunctionInfo.h"
+#include "R600Subtarget.h"
 
 using namespace llvm;
 
-R600MachineFunctionInfo::R600MachineFunctionInfo(const MachineFunction &MF)
-  : AMDGPUMachineFunction(MF) { }
+R600MachineFunctionInfo::R600MachineFunctionInfo(const Function &F,
+                                                 const R600Subtarget *STI)
+    : AMDGPUMachineFunction(F, *STI) {}

llvm/lib/Target/AMDGPU/R600TargetMachine.h

public:
 
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   const TargetSubtargetInfo *getSubtargetImpl(const Function &) const override;
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   bool isMachineVerifierClean() const override { return false; }
+
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_AMDGPU_R600TARGETMACHINE_H

llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h

public:
 
   void setVGPRForAGPRCopy(Register NewVGPRForAGPRCopy) {
     VGPRForAGPRCopy = NewVGPRForAGPRCopy;
   }
 
   bool isCalleeSavedReg(const MCPhysReg *CSRegs, MCPhysReg Reg) const;
 
 public:
-  SIMachineFunctionInfo(const MachineFunction &MF);
   SIMachineFunctionInfo(const SIMachineFunctionInfo &MFI) = default;
+  SIMachineFunctionInfo(const Function &F, const GCNSubtarget *STI);
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   bool initializeBaseYamlFields(const yaml::SIMachineFunctionInfo &YamlMFI,
                                 const MachineFunction &MF,

llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp

 #include <cassert>
 #include <optional>
 #include <vector>
 
 #define MAX_LANES 64
 
 using namespace llvm;
 
-SIMachineFunctionInfo::SIMachineFunctionInfo(const MachineFunction &MF)
-  : AMDGPUMachineFunction(MF),
-    Mode(MF.getFunction()),
-    GWSResourcePSV(static_cast<const AMDGPUTargetMachine &>(MF.getTarget())),
+const GCNTargetMachine &getTM(const GCNSubtarget *STI) {
+  const SITargetLowering *TLI = STI->getTargetLowering();
+  return static_cast<const GCNTargetMachine &>(TLI->getTargetMachine());
+}
+
+SIMachineFunctionInfo::SIMachineFunctionInfo(const Function &F,
+                                             const GCNSubtarget *STI)
+  : AMDGPUMachineFunction(F, *STI),
+    Mode(F),
+    GWSResourcePSV(getTM(STI)),
     PrivateSegmentBuffer(false),
     DispatchPtr(false),
     QueuePtr(false),
     KernargSegmentPtr(false),
     DispatchID(false),
     FlatScratchInit(false),
     WorkGroupIDX(false),
     WorkGroupIDY(false),
     WorkGroupIDZ(false),
     WorkGroupInfo(false),
     LDSKernelId(false),
     PrivateSegmentWaveByteOffset(false),
     WorkItemIDX(false),
     WorkItemIDY(false),
     WorkItemIDZ(false),
     ImplicitBufferPtr(false),
     ImplicitArgPtr(false),
     GITPtrHigh(0xffffffff),
     HighBitsOf32BitAddress(0) {
-  const GCNSubtarget &ST = MF.getSubtarget<GCNSubtarget>();
-  const Function &F = MF.getFunction();
+  const GCNSubtarget &ST = *static_cast<const GCNSubtarget *>(STI);
   FlatWorkGroupSizes = ST.getFlatWorkGroupSizes(F);
   WavesPerEU = ST.getWavesPerEU(F);
 
   Occupancy = ST.computeOccupancy(F, getLDSSize());
   CallingConv::ID CC = F.getCallingConv();
 
   // FIXME: Should have analysis or something rather than attribute to detect
   // calls.

llvm/lib/Target/ARC/ARCMachineFunctionInfo.h

 /// ARC target-specific information for each MachineFunction.
 class ARCFunctionInfo : public MachineFunctionInfo {
   virtual void anchor();
   bool ReturnStackOffsetSet;
   int VarArgsFrameIndex;
   unsigned ReturnStackOffset;
 
 public:
-  ARCFunctionInfo()
-      : ReturnStackOffsetSet(false), VarArgsFrameIndex(0),
-        ReturnStackOffset(-1U), MaxCallStackReq(0) {}
-
-  explicit ARCFunctionInfo(MachineFunction &MF)
+  explicit ARCFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
       : ReturnStackOffsetSet(false), VarArgsFrameIndex(0),
         ReturnStackOffset(-1U), MaxCallStackReq(0) {}
   ~ARCFunctionInfo() {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;

llvm/lib/Target/ARC/ARCTargetMachine.cpp

 
 void ARCPassConfig::addPreEmitPass() { addPass(createARCBranchFinalizePass()); }
 
 void ARCPassConfig::addPreRegAlloc() {
     addPass(createARCExpandPseudosPass());
     addPass(createARCOptAddrMode());
 }
 
+MachineFunctionInfo *ARCTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+    return ARCFunctionInfo::create<ARCFunctionInfo>(Allocator, F, STI);
+}
+
 // Force static initialization.
 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeARCTarget() {
   RegisterTargetMachine<ARCTargetMachine> X(getTheARCTarget());
 }
 
 TargetTransformInfo
 ARCTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(ARCTTIImpl(this, F));
 }

llvm/lib/Target/ARM/ARMMachineFunctionInfo.h

 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/Support/ErrorHandling.h"
 #include <utility>
 
 namespace llvm {
 
+class ARMSubtarget;
+
 /// ARMFunctionInfo - This class is derived from MachineFunctionInfo and
 /// contains private ARM-specific information for each MachineFunction.
 class ARMFunctionInfo : public MachineFunctionInfo {
   virtual void anchor();
 
   /// isThumb - True if this function is compiled under Thumb mode.
   /// Used to initialized Align, so must precede it.
   bool isThumb = false;
class ARMFunctionInfo : public MachineFunctionInfo {
 
   /// True if BTI instructions should be placed at potential indirect jump
   /// destinations.
   bool BranchTargetEnforcement = false;
 
 public:
   ARMFunctionInfo() = default;
 
-  explicit ARMFunctionInfo(MachineFunction &MF);
+  explicit ARMFunctionInfo(const Function &F, const ARMSubtarget *STI);
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   bool isThumbFunction() const { return isThumb; }
   bool isThumb1OnlyFunction() const { return isThumb && !hasThumb2; }

llvm/lib/Target/ARM/ARMMachineFunctionInfo.cpp

 //===-- ARMMachineFunctionInfo.cpp - ARM machine function info ------------===//
 //
 // 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 "ARMMachineFunctionInfo.h"
 #include "ARMSubtarget.h"
 
 using namespace llvm;
 
 void ARMFunctionInfo::anchor() {}
 
-static bool GetBranchTargetEnforcement(MachineFunction &MF) {
-  const auto &Subtarget = MF.getSubtarget<ARMSubtarget>();
-  if (!Subtarget.isMClass() || !Subtarget.hasV7Ops())
+static bool GetBranchTargetEnforcement(const Function &F,
+                                       const ARMSubtarget *Subtarget) {
+  if (!Subtarget->isMClass() || !Subtarget->hasV7Ops())
     return false;
 
-  const Function &F = MF.getFunction();
   if (!F.hasFnAttribute("branch-target-enforcement")) {
     if (const auto *BTE = mdconst::extract_or_null<ConstantInt>(
             F.getParent()->getModuleFlag("branch-target-enforcement")))
       return BTE->getZExtValue();
     return false;
   }
 
   const StringRef BTIEnable =
static std::pair<bool, bool> GetSignReturnAddress(const Function &F) {
 
   if (Scope.equals("all"))
     return {true, true};
 
   assert(Scope.equals("non-leaf"));
   return {true, false};
 }
 
-ARMFunctionInfo::ARMFunctionInfo(MachineFunction &MF)
-    : isThumb(MF.getSubtarget<ARMSubtarget>().isThumb()),
-      hasThumb2(MF.getSubtarget<ARMSubtarget>().hasThumb2()),
-      IsCmseNSEntry(MF.getFunction().hasFnAttribute("cmse_nonsecure_entry")),
-      IsCmseNSCall(MF.getFunction().hasFnAttribute("cmse_nonsecure_call")),
-      BranchTargetEnforcement(GetBranchTargetEnforcement(MF)) {
-
-  const auto &Subtarget = MF.getSubtarget<ARMSubtarget>();
-  if (Subtarget.isMClass() && Subtarget.hasV7Ops())
-    std::tie(SignReturnAddress, SignReturnAddressAll) =
-        GetSignReturnAddress(MF.getFunction());
+ARMFunctionInfo::ARMFunctionInfo(const Function &F,
+                                 const ARMSubtarget *Subtarget)
+    : isThumb(Subtarget->isThumb()), hasThumb2(Subtarget->hasThumb2()),
+      IsCmseNSEntry(F.hasFnAttribute("cmse_nonsecure_entry")),
+      IsCmseNSCall(F.hasFnAttribute("cmse_nonsecure_call")),
+      BranchTargetEnforcement(GetBranchTargetEnforcement(F, Subtarget)) {
+  if (Subtarget->isMClass() && Subtarget->hasV7Ops())
+    std::tie(SignReturnAddress, SignReturnAddressAll) = GetSignReturnAddress(F);
 }
 
 MachineFunctionInfo *
 ARMFunctionInfo::clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
                        const DenseMap<MachineBasicBlock *, MachineBasicBlock *>
                            &Src2DstMBB) const {
   return DestMF.cloneInfo<ARMFunctionInfo>(*this);
 }

llvm/lib/Target/ARM/ARMTargetMachine.h

return TargetTriple.getEnvironment() == Triple::GNUEABIHF ||
            (TargetTriple.isOSBinFormatMachO() &&
             TargetTriple.getSubArch() == Triple::ARMSubArch_v7em) ||
            TargetTriple.isOSWindows() ||
            TargetABI == ARMBaseTargetMachine::ARM_ABI_AAPCS16;
   }
 
   bool targetSchedulesPostRAScheduling() const override { return true; };
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   /// Returns true if a cast between SrcAS and DestAS is a noop.
   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
     // Addrspacecasts are always noops.
     return true;
   }
 };
 
 /// ARM/Thumb little endian target machine.

llvm/lib/Target/ARM/ARMTargetMachine.cpp

 //===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
 //
 // 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 "ARMTargetMachine.h"
 #include "ARM.h"
+#include "ARMMachineFunctionInfo.h"
 #include "ARMMacroFusion.h"
 #include "ARMSubtarget.h"
 #include "ARMTargetObjectFile.h"
 #include "ARMTargetTransformInfo.h"
 #include "MCTargetDesc/ARMMCTargetDesc.h"
 #include "TargetInfo/ARMTargetInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringRef.h"
ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T, const Triple &TT,
 
   // ARM supports the MachineOutliner.
   setMachineOutliner(true);
   setSupportsDefaultOutlining(true);
 }
 
 ARMBaseTargetMachine::~ARMBaseTargetMachine() = default;
 
+MachineFunctionInfo *ARMBaseTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return ARMFunctionInfo::create<ARMFunctionInfo>(
+      Allocator, F, static_cast<const ARMSubtarget *>(STI));
+}
+
 const ARMSubtarget *
 ARMBaseTargetMachine::getSubtargetImpl(const Function &F) const {
   Attribute CPUAttr = F.getFnAttribute("target-cpu");
   Attribute FSAttr = F.getFnAttribute("target-features");
 
   std::string CPU =
       CPUAttr.isValid() ? CPUAttr.getValueAsString().str() : TargetCPU;
   std::string FS =

llvm/lib/Target/AVR/AVRMachineFunctionInfo.h

class AVRMachineFunctionInfo : public MachineFunctionInfo {
   /// Size of the callee-saved register portion of the
   /// stack frame in bytes.
   unsigned CalleeSavedFrameSize;
 
   /// FrameIndex for start of varargs area.
   int VarArgsFrameIndex;
 
 public:
-  AVRMachineFunctionInfo()
-      : HasSpills(false), HasAllocas(false), HasStackArgs(false),
-        IsInterruptHandler(false), IsSignalHandler(false),
-        CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {}
-
-  explicit AVRMachineFunctionInfo(MachineFunction &MF)
+  AVRMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
       : HasSpills(false), HasAllocas(false), HasStackArgs(false),
         CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {
-    unsigned CallConv = MF.getFunction().getCallingConv();
+    CallingConv::ID CallConv = F.getCallingConv();
 
-    this->IsInterruptHandler = CallConv == CallingConv::AVR_INTR ||
-                               MF.getFunction().hasFnAttribute("interrupt");
-    this->IsSignalHandler = CallConv == CallingConv::AVR_SIGNAL ||
-                            MF.getFunction().hasFnAttribute("signal");
+    this->IsInterruptHandler =
+        CallConv == CallingConv::AVR_INTR || F.hasFnAttribute("interrupt");
+    this->IsSignalHandler =
+        CallConv == CallingConv::AVR_SIGNAL || F.hasFnAttribute("signal");
   }
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override {
     return DestMF.cloneInfo<AVRMachineFunctionInfo>(*this);
   }

llvm/lib/Target/AVR/AVRTargetMachine.h

public:
   const AVRSubtarget *getSubtargetImpl(const Function &) const override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return this->TLOF.get();
   }
 
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
 private:
   std::unique_ptr<TargetLoweringObjectFile> TLOF;
   AVRSubtarget SubTarget;
 };
 
 } // end namespace llvm
 
 #endif // LLVM_AVR_TARGET_MACHINE_H

llvm/lib/Target/AVR/AVRTargetMachine.cpp

 
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/Module.h"
 #include "llvm/MC/TargetRegistry.h"
 
 #include "AVR.h"
+#include "AVRMachineFunctionInfo.h"
 #include "AVRTargetObjectFile.h"
 #include "MCTargetDesc/AVRMCTargetDesc.h"
 #include "TargetInfo/AVRTargetInfo.h"
 
 #include <optional>
 
 namespace llvm {
 

 const AVRSubtarget *AVRTargetMachine::getSubtargetImpl() const {
   return &SubTarget;
 }
 
 const AVRSubtarget *AVRTargetMachine::getSubtargetImpl(const Function &) const {
   return &SubTarget;
 }
 
+MachineFunctionInfo *AVRTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return AVRMachineFunctionInfo::create<AVRMachineFunctionInfo>(Allocator, F,
+                                                                STI);
+}
+
 //===----------------------------------------------------------------------===//
 // Pass Pipeline Configuration
 //===----------------------------------------------------------------------===//
 
 bool AVRPassConfig::addInstSelector() {
   // Install an instruction selector.
   addPass(createAVRISelDag(getAVRTargetMachine(), getOptLevel()));
   // Create the frame analyzer pass used by the PEI pass.

llvm/lib/Target/CSKY/CSKYMachineFunctionInfo.h

class CSKYMachineFunctionInfo : public MachineFunctionInfo {
 
   int spillAreaSize = 0;
 
   bool LRSpilled = false;
 
   unsigned PICLabelUId = 0;
 
 public:
-  CSKYMachineFunctionInfo(MachineFunction &) {}
+  CSKYMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override {
     return DestMF.cloneInfo<CSKYMachineFunctionInfo>(*this);
   }
 

llvm/lib/Target/Hexagon/HexagonMachineFunctionInfo.h

class HexagonMachineFunctionInfo : public MachineFunctionInfo {
   bool HasClobberLR = false;
   bool HasEHReturn = false;
   std::map<const MachineInstr*, unsigned> PacketInfo;
   virtual void anchor();
 
 public:
   HexagonMachineFunctionInfo() = default;
 
-  HexagonMachineFunctionInfo(MachineFunction &MF) {}
+  HexagonMachineFunctionInfo(const Function &F,
+                             const TargetSubtargetInfo *STI) {}
+
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   unsigned getSRetReturnReg() const { return SRetReturnReg; }
   void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
 

llvm/lib/Target/Hexagon/HexagonTargetMachine.h

public:
 
   void registerPassBuilderCallbacks(PassBuilder &PB) override;
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   HexagonTargetObjectFile *getObjFileLowering() const override {
     return static_cast<HexagonTargetObjectFile*>(TLOF.get());
   }
+
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
 };
 
 } // end namespace llvm
 
 #endif

llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp

 //===-- HexagonTargetMachine.cpp - Define TargetMachine for Hexagon -------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // Implements the info about Hexagon target spec.
 //
 //===----------------------------------------------------------------------===//
 
 #include "HexagonTargetMachine.h"
 #include "Hexagon.h"
 #include "HexagonISelLowering.h"
 #include "HexagonLoopIdiomRecognition.h"
+#include "HexagonMachineFunctionInfo.h"
 #include "HexagonMachineScheduler.h"
 #include "HexagonTargetObjectFile.h"
 #include "HexagonTargetTransformInfo.h"
 #include "HexagonVectorLoopCarriedReuse.h"
 #include "TargetInfo/HexagonTargetInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/CodeGen/VLIWMachineScheduler.h"
PB.registerLoopOptimizerEndEPCallback(
       });
 }
 
 TargetTransformInfo
 HexagonTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(HexagonTTIImpl(this, F));
 }
 
+MachineFunctionInfo *HexagonTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return HexagonMachineFunctionInfo::create<HexagonMachineFunctionInfo>(
+      Allocator, F, STI);
+}
+
 HexagonTargetMachine::~HexagonTargetMachine() = default;
 
 namespace {
 /// Hexagon Code Generator Pass Configuration Options.
 class HexagonPassConfig : public TargetPassConfig {
 public:
   HexagonPassConfig(HexagonTargetMachine &TM, PassManagerBase &PM)
     : TargetPassConfig(TM, PM) {}

llvm/lib/Target/Lanai/LanaiMachineFunctionInfo.h

class LanaiMachineFunctionInfo : public MachineFunctionInfo {
   // use as the global base register. This is used for PIC in some PIC
   // relocation models.
   Register GlobalBaseReg;
 
   // VarArgsFrameIndex - FrameIndex for start of varargs area.
   int VarArgsFrameIndex;
 
 public:
-  explicit LanaiMachineFunctionInfo(MachineFunction &MF)
+  LanaiMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
       : VarArgsFrameIndex(0) {}
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   Register getSRetReturnReg() const { return SRetReturnReg; }
   void setSRetReturnReg(Register Reg) { SRetReturnReg = Reg; }
 
   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
   void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }
 };
 
 } // namespace llvm
 
 #endif // LLVM_LIB_TARGET_LANAI_LANAIMACHINEFUNCTIONINFO_H

llvm/lib/Target/Lanai/LanaiTargetMachine.h

public:
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &pass_manager) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   bool isMachineVerifierClean() const override {
     return false;
   }
 };
 } // namespace llvm
 
 #endif // LLVM_LIB_TARGET_LANAI_LANAITARGETMACHINE_H

llvm/lib/Target/Lanai/LanaiTargetMachine.cpp

 //===-- LanaiTargetMachine.cpp - Define TargetMachine for Lanai ---------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // Implements the info about Lanai target spec.
 //
 //===----------------------------------------------------------------------===//
 
 #include "LanaiTargetMachine.h"
 
 #include "Lanai.h"
+#include "LanaiMachineFunctionInfo.h"
 #include "LanaiTargetObjectFile.h"
 #include "LanaiTargetTransformInfo.h"
 #include "TargetInfo/LanaiTargetInfo.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/MC/TargetRegistry.h"
LanaiTargetMachine::LanaiTargetMachine(
   initAsmInfo();
 }
 
 TargetTransformInfo
 LanaiTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(LanaiTTIImpl(this, F));
 }
 
+MachineFunctionInfo *LanaiTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return LanaiMachineFunctionInfo::create<LanaiMachineFunctionInfo>(Allocator,
+                                                                    F, STI);
+}
+
 namespace {
 // Lanai Code Generator Pass Configuration Options.
 class LanaiPassConfig : public TargetPassConfig {
 public:
   LanaiPassConfig(LanaiTargetMachine &TM, PassManagerBase *PassManager)
       : TargetPassConfig(TM, *PassManager) {}
 
   LanaiTargetMachine &getLanaiTargetMachine() const {

llvm/lib/Target/LoongArch/LoongArchMachineFunctionInfo.h

private:
   /// Size of stack frame to save callee saved registers
   unsigned CalleeSavedStackSize = 0;
 
   /// FrameIndex of the spill slot when there is no scavenged register in
   /// insertIndirectBranch.
   int BranchRelaxationSpillFrameIndex = -1;
 
 public:
-  LoongArchMachineFunctionInfo(const MachineFunction &MF) {}
+  LoongArchMachineFunctionInfo(const Function &F,
+                               const TargetSubtargetInfo *STI) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override {
     return DestMF.cloneInfo<LoongArchMachineFunctionInfo>(*this);
   }
 

llvm/lib/Target/MSP430/MSP430MachineFunctionInfo.h

class MSP430MachineFunctionInfo : public MachineFunctionInfo {
   /// SRetReturnReg - Some subtargets require that sret lowering includes
   /// returning the value of the returned struct in a register. This field
   /// holds the virtual register into which the sret argument is passed.
   Register SRetReturnReg;
 
 public:
   MSP430MachineFunctionInfo() = default;
 
-  explicit MSP430MachineFunctionInfo(MachineFunction &MF)
+  MSP430MachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
       : CalleeSavedFrameSize(0), ReturnAddrIndex(0), SRetReturnReg(0) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
   void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }

llvm/lib/Target/MSP430/MSP430TargetMachine.h

public:
   const MSP430Subtarget *getSubtargetImpl(const Function &F) const override {
     return &Subtarget;
   }
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
+
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
 }; // MSP430TargetMachine.
 
 } // end namespace llvm
 
 #endif

llvm/lib/Target/MSP430/MSP430TargetMachine.cpp

 //===-- MSP430TargetMachine.cpp - Define TargetMachine for MSP430 ---------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // Top-level implementation for the MSP430 target.
 //
 //===----------------------------------------------------------------------===//
 
 #include "MSP430TargetMachine.h"
 #include "MSP430.h"
+#include "MSP430MachineFunctionInfo.h"
 #include "TargetInfo/MSP430TargetInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/TargetRegistry.h"
 #include <optional>
public:
   void addPreEmitPass() override;
 };
 } // namespace
 
 TargetPassConfig *MSP430TargetMachine::createPassConfig(PassManagerBase &PM) {
   return new MSP430PassConfig(*this, PM);
 }
 
+MachineFunctionInfo *MSP430TargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return MSP430MachineFunctionInfo::create<MSP430MachineFunctionInfo>(Allocator,
+                                                                      F, STI);
+}
+
 bool MSP430PassConfig::addInstSelector() {
   // Install an instruction selector.
   addPass(createMSP430ISelDag(getMSP430TargetMachine(), getOptLevel()));
   return false;
 }
 
 void MSP430PassConfig::addPreEmitPass() {
   // Must run branch selection immediately preceding the asm printer.
   addPass(createMSP430BranchSelectionPass());
 }

llvm/lib/Target/Mips/MipsMachineFunction.h

 #include <map>
 
 namespace llvm {
 
 /// MipsFunctionInfo - This class is derived from MachineFunction private
 /// Mips target-specific information for each MachineFunction.
 class MipsFunctionInfo : public MachineFunctionInfo {
 public:
-  MipsFunctionInfo(MachineFunction &MF) {}
+  MipsFunctionInfo(const Function &F, const TargetSubtargetInfo *STI) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   ~MipsFunctionInfo() override;
 

llvm/lib/Target/Mips/MipsTargetMachine.h

public:
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   /// Returns true if a cast between SrcAS and DestAS is a noop.
   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
     // Mips doesn't have any special address spaces so we just reserve
     // the first 256 for software use (e.g. OpenCL) and treat casts
     // between them as noops.
     return SrcAS < 256 && DestAS < 256;
   }
 

llvm/lib/Target/Mips/MipsTargetMachine.cpp

 //
 //===----------------------------------------------------------------------===//
 
 #include "MipsTargetMachine.h"
 #include "MCTargetDesc/MipsABIInfo.h"
 #include "MCTargetDesc/MipsMCTargetDesc.h"
 #include "Mips.h"
 #include "Mips16ISelDAGToDAG.h"
+#include "MipsMachineFunction.h"
 #include "MipsSEISelDAGToDAG.h"
 #include "MipsSubtarget.h"
 #include "MipsTargetObjectFile.h"
 #include "MipsTargetTransformInfo.h"
 #include "TargetInfo/MipsTargetInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
if (Subtarget->allowMixed16_32()) {
     // FIXME: This is no longer necessary as the TTI returned is per-function.
     return TargetTransformInfo(F.getParent()->getDataLayout());
   }
 
   LLVM_DEBUG(errs() << "Target Transform Info Pass Added\n");
   return TargetTransformInfo(MipsTTIImpl(this, F));
 }
 
+MachineFunctionInfo *MipsTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return MipsFunctionInfo::create<MipsFunctionInfo>(Allocator, F, STI);
+}
+
 // Implemented by targets that want to run passes immediately before
 // machine code is emitted.
 void MipsPassConfig::addPreEmitPass() {
   // Expand pseudo instructions that are sensitive to register allocation.
   addPass(createMipsExpandPseudoPass());
 
   // The microMIPS size reduction pass performs instruction reselection for
   // instructions which can be remapped to a 16 bit instruction.

llvm/lib/Target/NVPTX/NVPTXMachineFunctionInfo.h

 namespace llvm {
 class NVPTXMachineFunctionInfo : public MachineFunctionInfo {
 private:
   /// Stores a mapping from index to symbol name for removing image handles
   /// on Fermi.
   SmallVector<std::string, 8> ImageHandleList;
 
 public:
-  NVPTXMachineFunctionInfo(MachineFunction &MF) {}
+  NVPTXMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override {
     return DestMF.cloneInfo<NVPTXMachineFunctionInfo>(*this);
   }
 

llvm/lib/Target/NVPTX/NVPTXTargetMachine.h

public:
   bool addPassesToEmitMC(PassManagerBase &, MCContext *&, raw_pwrite_stream &,
                          bool = true) override {
     return true;
   }
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   void registerPassBuilderCallbacks(PassBuilder &PB) override;
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   bool isMachineVerifierClean() const override {
     return false;
   }
 

llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp

 //
 //===----------------------------------------------------------------------===//
 
 #include "NVPTXTargetMachine.h"
 #include "NVPTX.h"
 #include "NVPTXAllocaHoisting.h"
 #include "NVPTXAtomicLower.h"
 #include "NVPTXLowerAggrCopies.h"
+#include "NVPTXMachineFunctionInfo.h"
 #include "NVPTXTargetObjectFile.h"
 #include "NVPTXTargetTransformInfo.h"
 #include "TargetInfo/NVPTXTargetInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"

 };
 
 } // end anonymous namespace
 
 TargetPassConfig *NVPTXTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new NVPTXPassConfig(*this, PM);
 }
 
+MachineFunctionInfo *NVPTXTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return NVPTXMachineFunctionInfo::create<NVPTXMachineFunctionInfo>(Allocator,
+                                                                    F, STI);
+}
+
 void NVPTXTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) {
   PB.registerPipelineParsingCallback(
       [](StringRef PassName, FunctionPassManager &PM,
          ArrayRef<PassBuilder::PipelineElement>) {
         if (PassName == "nvvm-reflect") {
           PM.addPass(NVVMReflectPass());
           return true;
         }

llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.h

private:
   /// Whether this uses the PIC Base register or not.
   bool UsesPICBase = false;
 
   /// We keep track attributes for each live-in virtual registers
   /// to use SExt/ZExt flags in later optimization.
   std::vector<std::pair<Register, ISD::ArgFlagsTy>> LiveInAttrs;
 
 public:
-  explicit PPCFunctionInfo(const MachineFunction &MF);
+  explicit PPCFunctionInfo(const Function &F, const TargetSubtargetInfo *STI);
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   int getFramePointerSaveIndex() const { return FramePointerSaveIndex; }
   void setFramePointerSaveIndex(int Idx) { FramePointerSaveIndex = Idx; }

llvm/lib/Target/PowerPC/PPCMachineFunctionInfo.cpp

 
 using namespace llvm;
 static cl::opt<bool> PPCDisableNonVolatileCR(
     "ppc-disable-non-volatile-cr",
     cl::desc("Disable the use of non-volatile CR register fields"),
     cl::init(false), cl::Hidden);
 
 void PPCFunctionInfo::anchor() {}
-PPCFunctionInfo::PPCFunctionInfo(const MachineFunction &MF)
+PPCFunctionInfo::PPCFunctionInfo(const Function &F,
+                                 const TargetSubtargetInfo *STI)
     : DisableNonVolatileCR(PPCDisableNonVolatileCR) {}
 
 MachineFunctionInfo *
 PPCFunctionInfo::clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
                        const DenseMap<MachineBasicBlock *, MachineBasicBlock *>
                            &Src2DstMBB) const {
   return DestMF.cloneInfo<PPCFunctionInfo>(*this);
 }

llvm/lib/Target/PowerPC/PPCTargetMachine.h

public:
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
+
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   bool isELFv2ABI() const { return TargetABI == PPC_ABI_ELFv2; }
   bool isPPC64() const {
     const Triple &TT = getTargetTriple();
     return (TT.getArch() == Triple::ppc64 || TT.getArch() == Triple::ppc64le);
   };
 
   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
     // Addrspacecasts are always noops.

llvm/lib/Target/PowerPC/PPCTargetMachine.cpp

 //===-- PPCTargetMachine.cpp - Define TargetMachine for PowerPC -----------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 //
 // Top-level implementation for the PowerPC target.
 //
 //===----------------------------------------------------------------------===//
 
 #include "PPCTargetMachine.h"
 #include "MCTargetDesc/PPCMCTargetDesc.h"
 #include "PPC.h"
+#include "PPCMachineFunctionInfo.h"
 #include "PPCMachineScheduler.h"
 #include "PPCMacroFusion.h"
 #include "PPCSubtarget.h"
 #include "PPCTargetObjectFile.h"
 #include "PPCTargetTransformInfo.h"
 #include "TargetInfo/PowerPCTargetInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringRef.h"

 }
 
 bool PPCTargetMachine::isLittleEndian() const {
   assert(Endianness != Endian::NOT_DETECTED &&
          "Unable to determine endianness");
   return Endianness == Endian::LITTLE;
 }
 
+MachineFunctionInfo *PPCTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return PPCFunctionInfo::create<PPCFunctionInfo>(Allocator, F, STI);
+}
+
 static MachineSchedRegistry
 PPCPreRASchedRegistry("ppc-prera",
                       "Run PowerPC PreRA specific scheduler",
                       createPPCMachineScheduler);
 
 static MachineSchedRegistry
 PPCPostRASchedRegistry("ppc-postra",
                        "Run PowerPC PostRA specific scheduler",

llvm/lib/Target/RISCV/RISCVMachineFunctionInfo.h

private:
   unsigned CalleeSavedStackSize = 0;
   /// Is there any vector argument or return?
   bool IsVectorCall = false;
 
   /// Registers that have been sign extended from i32.
   SmallVector<Register, 8> SExt32Registers;
 
 public:
-  RISCVMachineFunctionInfo(const MachineFunction &MF) {}
+  RISCVMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
   void setVarArgsFrameIndex(int Index) { VarArgsFrameIndex = Index; }

llvm/lib/Target/RISCV/RISCVTargetMachine.h

public:
   const RISCVSubtarget *getSubtargetImpl() const = delete;
 
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DstAS) const override;
 
   yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override;
   yaml::MachineFunctionInfo *
   convertFuncInfoToYAML(const MachineFunction &MF) const override;
   bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &,
                                 PerFunctionMIParsingState &PFS,
                                 SMDiagnostic &Error,
                                 SMRange &SourceRange) const override;
 };
 } // namespace llvm
 
 #endif

llvm/lib/Target/RISCV/RISCVTargetMachine.cpp

if (const MDString *ModuleTargetABI = dyn_cast_or_null<MDString>(
       ABIName = ModuleTargetABI->getString();
     }
     I = std::make_unique<RISCVSubtarget>(
         TargetTriple, CPU, TuneCPU, FS, ABIName, RVVBitsMin, RVVBitsMax, *this);
   }
   return I.get();
 }
 
+MachineFunctionInfo *RISCVTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return RISCVMachineFunctionInfo::create<RISCVMachineFunctionInfo>(Allocator,
+                                                                    F, STI);
+}
+
 TargetTransformInfo
 RISCVTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(RISCVTTIImpl(this, F));
 }
 
 // A RISC-V hart has a single byte-addressable address space of 2^XLEN bytes
 // for all memory accesses, so it is reasonable to assume that an
 // implementation has no-op address space casts. If an implementation makes a

llvm/lib/Target/Sparc/SparcMachineFunctionInfo.h

private:
     Register SRetReturnReg;
 
     /// IsLeafProc - True if the function is a leaf procedure.
     bool IsLeafProc;
   public:
     SparcMachineFunctionInfo()
       : GlobalBaseReg(0), VarArgsFrameOffset(0), SRetReturnReg(0),
         IsLeafProc(false) {}
-    explicit SparcMachineFunctionInfo(MachineFunction &MF)
+    SparcMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
         : GlobalBaseReg(0), VarArgsFrameOffset(0), SRetReturnReg(0),
           IsLeafProc(false) {}
 
     MachineFunctionInfo *
     clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
           const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
         const override;
 
     Register getGlobalBaseReg() const { return GlobalBaseReg; }
     void setGlobalBaseReg(Register Reg) { GlobalBaseReg = Reg; }

llvm/lib/Target/Sparc/SparcTargetMachine.h

public:
   const SparcSubtarget *getSubtargetImpl() const { return &Subtarget; }
   const SparcSubtarget *getSubtargetImpl(const Function &) const override;
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
+
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
 };
 
 /// Sparc 32-bit target machine
 ///
 class SparcV8TargetMachine : public SparcTargetMachine {
   virtual void anchor();
 
 public:

llvm/lib/Target/Sparc/SparcTargetMachine.cpp

 //===-- SparcTargetMachine.cpp - Define TargetMachine for Sparc -----------===//
 //
 // 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 "SparcTargetMachine.h"
 #include "LeonPasses.h"
 #include "Sparc.h"
+#include "SparcMachineFunctionInfo.h"
 #include "SparcTargetObjectFile.h"
 #include "TargetInfo/SparcTargetInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/MC/TargetRegistry.h"
 #include <optional>
 using namespace llvm;
if (!I) {
     // function that reside in TargetOptions.
     resetTargetOptions(F);
     I = std::make_unique<SparcSubtarget>(TargetTriple, CPU, FS, *this,
                                           this->is64Bit);
   }
   return I.get();
 }
 
+MachineFunctionInfo *SparcTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return SparcMachineFunctionInfo::create<SparcMachineFunctionInfo>(Allocator,
+                                                                    F, STI);
+}
+
 namespace {
 /// Sparc Code Generator Pass Configuration Options.
 class SparcPassConfig : public TargetPassConfig {
 public:
   SparcPassConfig(SparcTargetMachine &TM, PassManagerBase &PM)
     : TargetPassConfig(TM, PM) {}
 
   SparcTargetMachine &getSparcTargetMachine() const {

llvm/lib/Target/SystemZ/SystemZMachineFunctionInfo.h

class SystemZMachineFunctionInfo : public MachineFunctionInfo {
   Register VarArgsFirstGPR;
   Register VarArgsFirstFPR;
   unsigned VarArgsFrameIndex;
   unsigned RegSaveFrameIndex;
   int FramePointerSaveIndex;
   unsigned NumLocalDynamics;
 
 public:
-  explicit SystemZMachineFunctionInfo(MachineFunction &MF)
+  SystemZMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
       : VarArgsFirstGPR(0), VarArgsFirstFPR(0), VarArgsFrameIndex(0),
         RegSaveFrameIndex(0), FramePointerSaveIndex(0), NumLocalDynamics(0) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   // Get and set the first and last call-saved GPR that should be saved by
   // this function and the SP offset for the STMG.  These are 0 if no GPRs

llvm/lib/Target/SystemZ/SystemZTargetMachine.h

public:
   // Override LLVMTargetMachine
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   bool targetSchedulesPostRAScheduling() const override { return true; };
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETMACHINE_H

llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp

 //===-- SystemZTargetMachine.cpp - Define TargetMachine for SystemZ -------===//
 //
 // 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 "SystemZTargetMachine.h"
 #include "MCTargetDesc/SystemZMCTargetDesc.h"
 #include "SystemZ.h"
+#include "SystemZMachineFunctionInfo.h"
 #include "SystemZMachineScheduler.h"
 #include "SystemZTargetTransformInfo.h"
 #include "TargetInfo/SystemZTargetInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"

 TargetPassConfig *SystemZTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new SystemZPassConfig(*this, PM);
 }
 
 TargetTransformInfo
 SystemZTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(SystemZTTIImpl(this, F));
 }
+
+MachineFunctionInfo *SystemZTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return SystemZMachineFunctionInfo::create<SystemZMachineFunctionInfo>(
+      Allocator, F, STI);
+}

llvm/lib/Target/VE/VEMachineFunctionInfo.h

private:
   /// VarArgsFrameOffset - Frame offset to start of varargs area.
   int VarArgsFrameOffset;
 
   /// IsLeafProc - True if the function is a leaf procedure.
   bool IsLeafProc;
 
 public:
   VEMachineFunctionInfo() : VarArgsFrameOffset(0), IsLeafProc(false) {}
-  explicit VEMachineFunctionInfo(MachineFunction &MF)
+  VEMachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI)
       : VarArgsFrameOffset(0), IsLeafProc(false) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   Register getGlobalBaseReg() const { return GlobalBaseReg; }

llvm/lib/Target/VE/VETargetMachine.h

public:
   }
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   bool isMachineVerifierClean() const override { return false; }
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   unsigned getSjLjDataSize() const override { return 64; }
 };
 
 } // namespace llvm
 
 #endif

llvm/lib/Target/VE/VETargetMachine.cpp

 //===-- VETargetMachine.cpp - Define TargetMachine for VE -----------------===//
 //
 // 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 "VETargetMachine.h"
 #include "TargetInfo/VETargetInfo.h"
 #include "VE.h"
+#include "VEMachineFunctionInfo.h"
 #include "VETargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/MC/TargetRegistry.h"
 #include <optional>
 

 
 VETargetMachine::~VETargetMachine() = default;
 
 TargetTransformInfo
 VETargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(VETTIImpl(this, F));
 }
 
+MachineFunctionInfo *VETargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return VEMachineFunctionInfo::create<VEMachineFunctionInfo>(Allocator, F,
+                                                              STI);
+}
+
 namespace {
 /// VE Code Generator Pass Configuration Options.
 class VEPassConfig : public TargetPassConfig {
 public:
   VEPassConfig(VETargetMachine &TM, PassManagerBase &PM)
       : TargetPassConfig(TM, PM) {}
 
   VETargetMachine &getVETargetMachine() const {

llvm/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.h

class WebAssemblyFunctionInfo final : public MachineFunctionInfo {
   // The local holding the frame base. This is either FP or SP
   // after WebAssemblyExplicitLocals
   unsigned FrameBaseLocal = -1U;
 
   // Function properties.
   bool CFGStackified = false;
 
 public:
-  explicit WebAssemblyFunctionInfo(MachineFunction &) {}
+  explicit WebAssemblyFunctionInfo(const Function &F,
+                                   const TargetSubtargetInfo *STI) {}
   ~WebAssemblyFunctionInfo() override;
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   void initializeBaseYamlFields(MachineFunction &MF,

llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.h

public:
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   bool usesPhysRegsForValues() const override { return false; }
 
   yaml::MachineFunctionInfo *createDefaultFuncInfoYAML() const override;
   yaml::MachineFunctionInfo *
   convertFuncInfoToYAML(const MachineFunction &MF) const override;
   bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &,
                                 PerFunctionMIParsingState &PFS,
                                 SMDiagnostic &Error,
                                 SMRange &SourceRange) const override;
 };
 
 } // end namespace llvm
 
 #endif

llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp

public:
   // No reg alloc
   bool addRegAssignAndRewriteFast() override { return false; }
 
   // No reg alloc
   bool addRegAssignAndRewriteOptimized() override { return false; }
 };
 } // end anonymous namespace
 
+MachineFunctionInfo *WebAssemblyTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return WebAssemblyFunctionInfo::create<WebAssemblyFunctionInfo>(Allocator, F,
+                                                                  STI);
+}
+
 TargetTransformInfo
 WebAssemblyTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(WebAssemblyTTIImpl(this, F));
 }
 
 TargetPassConfig *
 WebAssemblyTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new WebAssemblyPassConfig(*this, PM);

llvm/lib/Target/X86/X86MachineFunctionInfo.h

 
 private:
   /// ForwardedMustTailRegParms - A list of virtual and physical registers
   /// that must be forwarded to every musttail call.
   SmallVector<ForwardedRegister, 1> ForwardedMustTailRegParms;
 
 public:
   X86MachineFunctionInfo() = default;
+  X86MachineFunctionInfo(const Function &F, const TargetSubtargetInfo *STI) {}
 
-  explicit X86MachineFunctionInfo(MachineFunction &MF) {}
-  explicit X86MachineFunctionInfo(const X86MachineFunctionInfo &) = default;
+  X86MachineFunctionInfo(const X86MachineFunctionInfo &) = default;
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   bool getForceFramePointer() const { return ForceFramePointer;}
   void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }

llvm/lib/Target/X86/X86TargetMachine.h

public:
 
   // Set up the pass pipeline.
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
+
   bool isJIT() const { return IsJIT; }
 
   bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override;
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_X86_X86TARGETMACHINE_H

llvm/lib/Target/X86/X86TargetMachine.cpp

 //===----------------------------------------------------------------------===//
 
 #include "X86TargetMachine.h"
 #include "MCTargetDesc/X86MCTargetDesc.h"
 #include "TargetInfo/X86TargetInfo.h"
 #include "X86.h"
 #include "X86CallLowering.h"
 #include "X86LegalizerInfo.h"
+#include "X86MachineFunctionInfo.h"
 #include "X86MacroFusion.h"
 #include "X86Subtarget.h"
 #include "X86TargetObjectFile.h"
 #include "X86TargetTransformInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"

 INITIALIZE_PASS_DEPENDENCY(ReachingDefAnalysis)
 INITIALIZE_PASS_END(X86ExecutionDomainFix, "x86-execution-domain-fix",
   "X86 Execution Domain Fix", false, false)
 
 TargetPassConfig *X86TargetMachine::createPassConfig(PassManagerBase &PM) {
   return new X86PassConfig(*this, PM);
 }
 
+MachineFunctionInfo *X86TargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return X86MachineFunctionInfo::create<X86MachineFunctionInfo>(Allocator, F,
+                                                                STI);
+}
+
 void X86PassConfig::addIRPasses() {
   addPass(createAtomicExpandPass());
 
   // We add both pass anyway and when these two passes run, we skip the pass
   // based on the option level and option attribute.
   addPass(createX86LowerAMXIntrinsicsPass());
   addPass(createX86LowerAMXTypePass());
 

llvm/lib/Target/XCore/XCoreMachineFunctionInfo.h

class XCoreFunctionInfo : public MachineFunctionInfo {
   std::vector<std::pair<MachineBasicBlock::iterator, CalleeSavedInfo>>
   SpillLabels;
 
   virtual void anchor();
 
 public:
   XCoreFunctionInfo() = default;
 
-  explicit XCoreFunctionInfo(MachineFunction &MF) {}
+  explicit XCoreFunctionInfo(const Function &F,
+                             const TargetSubtargetInfo *STI) {}
 
   MachineFunctionInfo *
   clone(BumpPtrAllocator &Allocator, MachineFunction &DestMF,
         const DenseMap<MachineBasicBlock *, MachineBasicBlock *> &Src2DstMBB)
       const override;
 
   ~XCoreFunctionInfo() override = default;
 

llvm/lib/Target/XCore/XCoreTargetMachine.h

public:
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
   TargetTransformInfo getTargetTransformInfo(const Function &F) const override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
+
+  MachineFunctionInfo *
+  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
+                            const TargetSubtargetInfo *STI) const override;
 };
 
 } // end namespace llvm
 
 #endif // LLVM_LIB_TARGET_XCORE_XCORETARGETMACHINE_H

llvm/lib/Target/XCore/XCoreTargetMachine.cpp

 //===-- XCoreTargetMachine.cpp - Define TargetMachine for XCore -----------===//
 //
 // 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 "XCoreTargetMachine.h"
 #include "MCTargetDesc/XCoreMCTargetDesc.h"
 #include "TargetInfo/XCoreTargetInfo.h"
 #include "XCore.h"
+#include "XCoreMachineFunctionInfo.h"
 #include "XCoreTargetObjectFile.h"
 #include "XCoreTargetTransformInfo.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/CodeGen.h"

 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeXCoreTarget() {
   RegisterTargetMachine<XCoreTargetMachine> X(getTheXCoreTarget());
 }
 
 TargetTransformInfo
 XCoreTargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(XCoreTTIImpl(this, F));
 }
+
+MachineFunctionInfo *XCoreTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return XCoreFunctionInfo::create<XCoreFunctionInfo>(Allocator, F, STI);
+}