Revert "[LLVM][LTO] Factor out RTLib calls and allow them to be dropped (#98512)"

This reverts commit c05126bdfc3b02daa37d11056fa43db1a6cdef69.
(llvmorg-19-init-17714-gc05126bdfc3b)
See #99610

37 files changed, 568 insertions, 676 deletions

diff --git a/lld/COFF/Driver.cpp b/lld/COFF/Driver.cpp
index 9e28b1c..cef6271 100644
--- a/lld/COFF/Driver.cpp
+++ b/lld/COFF/Driver.cpp
@@ -2428,12 +2428,9 @@ void LinkerDriver::linkerMain(ArrayRef<const char *> argsArr) {
       // file's symbol table. If any of those library functions are defined in a
       // bitcode file in an archive member, we need to arrange to use LTO to
       // compile those archive members by adding them to the link beforehand.
-      if (!ctx.bitcodeFileInstances.empty()) {
-        llvm::Triple TT(
-            ctx.bitcodeFileInstances.front()->obj->getTargetTriple());
-        for (auto *s : lto::LTO::getRuntimeLibcallSymbols(TT))
+      if (!ctx.bitcodeFileInstances.empty())
+        for (auto *s : lto::LTO::getRuntimeLibcallSymbols())
           ctx.symtab.addLibcall(s);
-      }
 
       // Windows specific -- if __load_config_used can be resolved, resolve it.
       if (ctx.symtab.findUnderscore("_load_config_used"))
diff --git a/lld/ELF/Driver.cpp b/lld/ELF/Driver.cpp
index 40e095a..3a3070a 100644
--- a/lld/ELF/Driver.cpp
+++ b/lld/ELF/Driver.cpp
@@ -2884,11 +2884,9 @@ template <class ELFT> void LinkerDriver::link(opt::InputArgList &args) {
   // to, i.e. if the symbol's definition is in bitcode. Any other required
   // libcall symbols will be added to the link after LTO when we add the LTO
   // object file to the link.
-  if (!ctx.bitcodeFiles.empty()) {
-    llvm::Triple TT(ctx.bitcodeFiles.front()->obj->getTargetTriple());
-    for (auto *s : lto::LTO::getRuntimeLibcallSymbols(TT))
+  if (!ctx.bitcodeFiles.empty())
+    for (auto *s : lto::LTO::getRuntimeLibcallSymbols())
       handleLibcall(s);
-  }
 
   // Archive members defining __wrap symbols may be extracted.
   std::vector<WrappedSymbol> wrapped = addWrappedSymbols(args);
diff --git a/lld/wasm/Driver.cpp b/lld/wasm/Driver.cpp
index 8c83d17..b66b988 100644
--- a/lld/wasm/Driver.cpp
+++ b/lld/wasm/Driver.cpp
@@ -1320,11 +1320,9 @@ void LinkerDriver::linkerMain(ArrayRef<const char *> argsArr) {
   // We only need to add libcall symbols to the link before LTO if the symbol's
   // definition is in bitcode. Any other required libcall symbols will be added
   // to the link after LTO when we add the LTO object file to the link.
-  if (!ctx.bitcodeFiles.empty()) {
-    llvm::Triple TT(ctx.bitcodeFiles.front()->obj->getTargetTriple());
-    for (auto *s : lto::LTO::getRuntimeLibcallSymbols(TT))
+  if (!ctx.bitcodeFiles.empty())
+    for (auto *s : lto::LTO::getRuntimeLibcallSymbols())
       handleLibcall(s);
-  }
   if (errorCount())
     return;
 
diff --git a/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h b/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
index b17bc9a..b599b03 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
@@ -22,7 +22,7 @@
 
 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
 #include "llvm/CodeGen/GlobalISel/GISelKnownBits.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
 
 namespace llvm {
diff --git a/llvm/include/llvm/CodeGen/RuntimeLibcallUtil.h b/llvm/include/llvm/CodeGen/RuntimeLibcallUtil.h
deleted file mode 100644
index ce63dcc..0000000
--- a/llvm/include/llvm/CodeGen/RuntimeLibcallUtil.h
+++ /dev/null
@@ -1,96 +0,0 @@
-//===-- CodeGen/RuntimeLibcallUtil.h - Runtime Library Calls ----*- 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines some helper functions for runtime library calls.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CODEGEN_RUNTIMELIBCALLS_H
-#define LLVM_CODEGEN_RUNTIMELIBCALLS_H
-
-#include "llvm/CodeGen/ValueTypes.h"
-#include "llvm/IR/RuntimeLibcalls.h"
-#include "llvm/Support/AtomicOrdering.h"
-
-namespace llvm {
-namespace RTLIB {
-
-/// GetFPLibCall - Helper to return the right libcall for the given floating
-/// point type, or UNKNOWN_LIBCALL if there is none.
-Libcall getFPLibCall(EVT VT, Libcall Call_F32, Libcall Call_F64,
-                     Libcall Call_F80, Libcall Call_F128, Libcall Call_PPCF128);
-
-/// getFPEXT - Return the FPEXT_*_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getFPEXT(EVT OpVT, EVT RetVT);
-
-/// getFPROUND - Return the FPROUND_*_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getFPROUND(EVT OpVT, EVT RetVT);
-
-/// getFPTOSINT - Return the FPTOSINT_*_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getFPTOSINT(EVT OpVT, EVT RetVT);
-
-/// getFPTOUINT - Return the FPTOUINT_*_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getFPTOUINT(EVT OpVT, EVT RetVT);
-
-/// getSINTTOFP - Return the SINTTOFP_*_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getSINTTOFP(EVT OpVT, EVT RetVT);
-
-/// getUINTTOFP - Return the UINTTOFP_*_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getUINTTOFP(EVT OpVT, EVT RetVT);
-
-/// getPOWI - Return the POWI_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getPOWI(EVT RetVT);
-
-/// getLDEXP - Return the LDEXP_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getLDEXP(EVT RetVT);
-
-/// getFREXP - Return the FREXP_* value for the given types, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getFREXP(EVT RetVT);
-
-/// Return the SYNC_FETCH_AND_* value for the given opcode and type, or
-/// UNKNOWN_LIBCALL if there is none.
-Libcall getSYNC(unsigned Opc, MVT VT);
-
-/// Return the outline atomics value for the given atomic ordering, access
-/// size and set of libcalls for a given atomic, or UNKNOWN_LIBCALL if there
-/// is none.
-Libcall getOutlineAtomicHelper(const Libcall (&LC)[5][4], AtomicOrdering Order,
-                               uint64_t MemSize);
-
-/// Return the outline atomics value for the given opcode, atomic ordering
-/// and type, or UNKNOWN_LIBCALL if there is none.
-Libcall getOUTLINE_ATOMIC(unsigned Opc, AtomicOrdering Order, MVT VT);
-
-/// getMEMCPY_ELEMENT_UNORDERED_ATOMIC - Return
-/// MEMCPY_ELEMENT_UNORDERED_ATOMIC_* value for the given element size or
-/// UNKNOW_LIBCALL if there is none.
-Libcall getMEMCPY_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize);
-
-/// getMEMMOVE_ELEMENT_UNORDERED_ATOMIC - Return
-/// MEMMOVE_ELEMENT_UNORDERED_ATOMIC_* value for the given element size or
-/// UNKNOW_LIBCALL if there is none.
-Libcall getMEMMOVE_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize);
-
-/// getMEMSET_ELEMENT_UNORDERED_ATOMIC - Return
-/// MEMSET_ELEMENT_UNORDERED_ATOMIC_* value for the given element size or
-/// UNKNOW_LIBCALL if there is none.
-Libcall getMEMSET_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize);
-
-} // namespace RTLIB
-} // namespace llvm
-
-#endif
diff --git a/llvm/include/llvm/CodeGen/RuntimeLibcalls.h b/llvm/include/llvm/CodeGen/RuntimeLibcalls.h
new file mode 100644
index 0000000..3a407c4
--- /dev/null
+++ b/llvm/include/llvm/CodeGen/RuntimeLibcalls.h
@@ -0,0 +1,113 @@
+//===-- CodeGen/RuntimeLibcalls.h - Runtime Library Calls -------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the enum representing the list of runtime library calls
+// the backend may emit during code generation, and also some helper functions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_RUNTIMELIBCALLS_H
+#define LLVM_CODEGEN_RUNTIMELIBCALLS_H
+
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/Support/AtomicOrdering.h"
+
+namespace llvm {
+namespace RTLIB {
+  /// RTLIB::Libcall enum - This enum defines all of the runtime library calls
+  /// the backend can emit.  The various long double types cannot be merged,
+  /// because 80-bit library functions use "xf" and 128-bit use "tf".
+  ///
+  /// When adding PPCF128 functions here, note that their names generally need
+  /// to be overridden for Darwin with the xxx$LDBL128 form.  See
+  /// PPCISelLowering.cpp.
+  ///
+  enum Libcall {
+#define HANDLE_LIBCALL(code, name) code,
+    #include "llvm/IR/RuntimeLibcalls.def"
+#undef HANDLE_LIBCALL
+  };
+
+  /// GetFPLibCall - Helper to return the right libcall for the given floating
+  /// point type, or UNKNOWN_LIBCALL if there is none.
+  Libcall getFPLibCall(EVT VT,
+                       Libcall Call_F32,
+                       Libcall Call_F64,
+                       Libcall Call_F80,
+                       Libcall Call_F128,
+                       Libcall Call_PPCF128);
+
+  /// getFPEXT - Return the FPEXT_*_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getFPEXT(EVT OpVT, EVT RetVT);
+
+  /// getFPROUND - Return the FPROUND_*_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getFPROUND(EVT OpVT, EVT RetVT);
+
+  /// getFPTOSINT - Return the FPTOSINT_*_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getFPTOSINT(EVT OpVT, EVT RetVT);
+
+  /// getFPTOUINT - Return the FPTOUINT_*_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getFPTOUINT(EVT OpVT, EVT RetVT);
+
+  /// getSINTTOFP - Return the SINTTOFP_*_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getSINTTOFP(EVT OpVT, EVT RetVT);
+
+  /// getUINTTOFP - Return the UINTTOFP_*_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getUINTTOFP(EVT OpVT, EVT RetVT);
+
+  /// getPOWI - Return the POWI_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getPOWI(EVT RetVT);
+
+  /// getLDEXP - Return the LDEXP_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getLDEXP(EVT RetVT);
+
+  /// getFREXP - Return the FREXP_* value for the given types, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getFREXP(EVT RetVT);
+
+  /// Return the SYNC_FETCH_AND_* value for the given opcode and type, or
+  /// UNKNOWN_LIBCALL if there is none.
+  Libcall getSYNC(unsigned Opc, MVT VT);
+
+  /// Return the outline atomics value for the given atomic ordering, access
+  /// size and set of libcalls for a given atomic, or UNKNOWN_LIBCALL if there
+  /// is none.
+  Libcall getOutlineAtomicHelper(const Libcall (&LC)[5][4],
+                                 AtomicOrdering Order, uint64_t MemSize);
+
+  /// Return the outline atomics value for the given opcode, atomic ordering
+  /// and type, or UNKNOWN_LIBCALL if there is none.
+  Libcall getOUTLINE_ATOMIC(unsigned Opc, AtomicOrdering Order, MVT VT);
+
+  /// getMEMCPY_ELEMENT_UNORDERED_ATOMIC - Return
+  /// MEMCPY_ELEMENT_UNORDERED_ATOMIC_* value for the given element size or
+  /// UNKNOW_LIBCALL if there is none.
+  Libcall getMEMCPY_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize);
+
+  /// getMEMMOVE_ELEMENT_UNORDERED_ATOMIC - Return
+  /// MEMMOVE_ELEMENT_UNORDERED_ATOMIC_* value for the given element size or
+  /// UNKNOW_LIBCALL if there is none.
+  Libcall getMEMMOVE_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize);
+
+  /// getMEMSET_ELEMENT_UNORDERED_ATOMIC - Return
+  /// MEMSET_ELEMENT_UNORDERED_ATOMIC_* value for the given element size or
+  /// UNKNOW_LIBCALL if there is none.
+  Libcall getMEMSET_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize);
+
+}
+}
+
+#endif
diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h b/llvm/include/llvm/CodeGen/TargetLowering.h
index d4a2166..64c7382 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -31,7 +31,7 @@
 #include "llvm/CodeGen/ISDOpcodes.h"
 #include "llvm/CodeGen/LowLevelTypeUtils.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetCallingConv.h"
@@ -45,7 +45,6 @@
 #include "llvm/IR/InlineAsm.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
-#include "llvm/IR/RuntimeLibcalls.h"
 #include "llvm/IR/Type.h"
 #include "llvm/Support/Alignment.h"
 #include "llvm/Support/AtomicOrdering.h"
@@ -3415,40 +3414,44 @@ public:
     return nullptr;
   }
 
+  //===--------------------------------------------------------------------===//
+  // Runtime Library hooks
+  //
+
   /// Rename the default libcall routine name for the specified libcall.
   void setLibcallName(RTLIB::Libcall Call, const char *Name) {
-    Libcalls.setLibcallName(Call, Name);
+    LibcallRoutineNames[Call] = Name;
   }
-
   void setLibcallName(ArrayRef<RTLIB::Libcall> Calls, const char *Name) {
-    Libcalls.setLibcallName(Calls, Name);
+    for (auto Call : Calls)
+      setLibcallName(Call, Name);
   }
 
   /// Get the libcall routine name for the specified libcall.
   const char *getLibcallName(RTLIB::Libcall Call) const {
-    return Libcalls.getLibcallName(Call);
+    return LibcallRoutineNames[Call];
   }
 
   /// Override the default CondCode to be used to test the result of the
   /// comparison libcall against zero.
   void setCmpLibcallCC(RTLIB::Libcall Call, ISD::CondCode CC) {
-    Libcalls.setCmpLibcallCC(Call, CC);
+    CmpLibcallCCs[Call] = CC;
   }
 
   /// Get the CondCode that's to be used to test the result of the comparison
   /// libcall against zero.
   ISD::CondCode getCmpLibcallCC(RTLIB::Libcall Call) const {
-    return Libcalls.getCmpLibcallCC(Call);
+    return CmpLibcallCCs[Call];
   }
 
   /// Set the CallingConv that should be used for the specified libcall.
   void setLibcallCallingConv(RTLIB::Libcall Call, CallingConv::ID CC) {
-    Libcalls.setLibcallCallingConv(Call, CC);
+    LibcallCallingConvs[Call] = CC;
   }
 
   /// Get the CallingConv that should be used for the specified libcall.
   CallingConv::ID getLibcallCallingConv(RTLIB::Libcall Call) const {
-    return Libcalls.getLibcallCallingConv(Call);
+    return LibcallCallingConvs[Call];
   }
 
   /// Execute target specific actions to finalize target lowering.
@@ -3627,8 +3630,18 @@ private:
   std::map<std::pair<unsigned, MVT::SimpleValueType>, MVT::SimpleValueType>
     PromoteToType;
 
-  /// The list of libcalls that the target will use.
-  RTLIB::RuntimeLibcallsInfo Libcalls;
+  /// Stores the name each libcall.
+  const char *LibcallRoutineNames[RTLIB::UNKNOWN_LIBCALL + 1];
+
+  /// The ISD::CondCode that should be used to test the result of each of the
+  /// comparison libcall against zero.
+  ISD::CondCode CmpLibcallCCs[RTLIB::UNKNOWN_LIBCALL];
+
+  /// Stores the CallingConv that should be used for each libcall.
+  CallingConv::ID LibcallCallingConvs[RTLIB::UNKNOWN_LIBCALL];
+
+  /// Set default libcall names and calling conventions.
+  void InitLibcalls(const Triple &TT);
 
   /// The bits of IndexedModeActions used to store the legalisation actions
   /// We store the data as   | ML | MS |  L |  S | each taking 4 bits.
diff --git a/llvm/include/llvm/IR/RuntimeLibcalls.h b/llvm/include/llvm/IR/RuntimeLibcalls.h
deleted file mode 100644
index 3057bff..0000000
--- a/llvm/include/llvm/IR/RuntimeLibcalls.h
+++ /dev/null
@@ -1,126 +0,0 @@
-//===- RuntimeLibcalls.h - Interface for runtime libcalls -------*- 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements a common interface to work with library calls into a
-// runtime that may be emitted by a given backend.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_IR_RUNTIME_LIBCALLS_H
-#define LLVM_IR_RUNTIME_LIBCALLS_H
-
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/CodeGen/ISDOpcodes.h"
-#include "llvm/IR/CallingConv.h"
-#include "llvm/Support/AtomicOrdering.h"
-#include "llvm/TargetParser/Triple.h"
-
-namespace llvm {
-namespace RTLIB {
-
-/// RTLIB::Libcall enum - This enum defines all of the runtime library calls
-/// the backend can emit.  The various long double types cannot be merged,
-/// because 80-bit library functions use "xf" and 128-bit use "tf".
-///
-/// When adding PPCF128 functions here, note that their names generally need
-/// to be overridden for Darwin with the xxx$LDBL128 form.  See
-/// PPCISelLowering.cpp.
-///
-enum Libcall {
-#define HANDLE_LIBCALL(code, name) code,
-#include "llvm/IR/RuntimeLibcalls.def"
-#undef HANDLE_LIBCALL
-};
-
-/// A simple container for information about the supported runtime calls.
-struct RuntimeLibcallsInfo {
-  explicit RuntimeLibcallsInfo(const Triple &TT) {
-    initLibcalls(TT);
-    initCmpLibcallCCs();
-  }
-
-  /// Rename the default libcall routine name for the specified libcall.
-  void setLibcallName(RTLIB::Libcall Call, const char *Name) {
-    LibcallRoutineNames[Call] = Name;
-  }
-
-  void setLibcallName(ArrayRef<RTLIB::Libcall> Calls, const char *Name) {
-    for (auto Call : Calls)
-      setLibcallName(Call, Name);
-  }
-
-  /// Get the libcall routine name for the specified libcall.
-  const char *getLibcallName(RTLIB::Libcall Call) const {
-    return LibcallRoutineNames[Call];
-  }
-
-  /// Override the default CondCode to be used to test the result of the
-  /// comparison libcall against zero.
-  void setCmpLibcallCC(RTLIB::Libcall Call, ISD::CondCode CC) {
-    CmpLibcallCCs[Call] = CC;
-  }
-
-  /// Get the CondCode that's to be used to test the result of the comparison
-  /// libcall against zero.
-  ISD::CondCode getCmpLibcallCC(RTLIB::Libcall Call) const {
-    return CmpLibcallCCs[Call];
-  }
-
-  /// Set the CallingConv that should be used for the specified libcall.
-  void setLibcallCallingConv(RTLIB::Libcall Call, CallingConv::ID CC) {
-    LibcallCallingConvs[Call] = CC;
-  }
-
-  /// Get the CallingConv that should be used for the specified libcall.
-  CallingConv::ID getLibcallCallingConv(RTLIB::Libcall Call) const {
-    return LibcallCallingConvs[Call];
-  }
-
-  iterator_range<const char **> getLibcallNames() {
-    return llvm::make_range(LibcallRoutineNames,
-                            LibcallRoutineNames + RTLIB::UNKNOWN_LIBCALL);
-  }
-
-private:
-  /// Stores the name each libcall.
-  const char *LibcallRoutineNames[RTLIB::UNKNOWN_LIBCALL + 1];
-
-  /// The ISD::CondCode that should be used to test the result of each of the
-  /// comparison libcall against zero.
-  ISD::CondCode CmpLibcallCCs[RTLIB::UNKNOWN_LIBCALL];
-
-  /// Stores the CallingConv that should be used for each libcall.
-  CallingConv::ID LibcallCallingConvs[RTLIB::UNKNOWN_LIBCALL];
-
-  static bool darwinHasSinCos(const Triple &TT) {
-    assert(TT.isOSDarwin() && "should be called with darwin triple");
-    // Don't bother with 32 bit x86.
-    if (TT.getArch() == Triple::x86)
-      return false;
-    // Macos < 10.9 has no sincos_stret.
-    if (TT.isMacOSX())
-      return !TT.isMacOSXVersionLT(10, 9) && TT.isArch64Bit();
-    // iOS < 7.0 has no sincos_stret.
-    if (TT.isiOS())
-      return !TT.isOSVersionLT(7, 0);
-    // Any other darwin such as WatchOS/TvOS is new enough.
-    return true;
-  }
-
-  /// Sets default libcall calling conventions.
-  void initCmpLibcallCCs();
-
-  /// Set default libcall names. If a target wants to opt-out of a libcall it
-  /// should be placed here.
-  void initLibcalls(const Triple &TT);
-};
-
-} // namespace RTLIB
-} // namespace llvm
-
-#endif // LLVM_IR_RUNTIME_LIBCALLS_H
diff --git a/llvm/include/llvm/LTO/LTO.h b/llvm/include/llvm/LTO/LTO.h
index 30eda34..94996ae 100644
--- a/llvm/include/llvm/LTO/LTO.h
+++ b/llvm/include/llvm/LTO/LTO.h
@@ -301,7 +301,7 @@ public:
 
   /// Static method that returns a list of libcall symbols that can be generated
   /// by LTO but might not be visible from bitcode symbol table.
-  static SmallVector<const char *> getRuntimeLibcallSymbols(const Triple &TT);
+  static ArrayRef<const char*> getRuntimeLibcallSymbols();
 
 private:
   Config Conf;
diff --git a/llvm/lib/CodeGen/AtomicExpandPass.cpp b/llvm/lib/CodeGen/AtomicExpandPass.cpp
index ebcf761..cea09bc 100644
--- a/llvm/lib/CodeGen/AtomicExpandPass.cpp
+++ b/llvm/lib/CodeGen/AtomicExpandPass.cpp
@@ -21,7 +21,7 @@
 #include "llvm/Analysis/OptimizationRemarkEmitter.h"
 #include "llvm/CodeGen/AtomicExpand.h"
 #include "llvm/CodeGen/AtomicExpandUtils.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/TargetLowering.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/CodeGen/TargetSubtargetInfo.h"
diff --git a/llvm/lib/CodeGen/DwarfEHPrepare.cpp b/llvm/lib/CodeGen/DwarfEHPrepare.cpp
index 324329c..09e7cfb 100644
--- a/llvm/lib/CodeGen/DwarfEHPrepare.cpp
+++ b/llvm/lib/CodeGen/DwarfEHPrepare.cpp
@@ -18,7 +18,7 @@
 #include "llvm/Analysis/CFG.h"
 #include "llvm/Analysis/DomTreeUpdater.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/TargetLowering.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/CodeGen/TargetSubtargetInfo.h"
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index 68a8a27..b10d51a 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -38,7 +38,7 @@
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/StackProtector.h"
 #include "llvm/CodeGen/SwitchLoweringUtils.h"
 #include "llvm/CodeGen/TargetFrameLowering.h"
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 640a425..b8653af 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -25,7 +25,7 @@
 #include "llvm/CodeGen/MachineConstantPool.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/TargetFrameLowering.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"
 #include "llvm/CodeGen/TargetLowering.h"
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 9b2153c..b584aa5 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -37,7 +37,7 @@
 #include "llvm/CodeGen/ISDOpcodes.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SDPatternMatch.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGAddressAnalysis.h"
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 7f5b46a..9f51573 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -25,7 +25,7 @@
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineJumpTableInfo.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetFrameLowering.h"
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 02d44cd..0ccae50 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -36,7 +36,7 @@
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SDPatternMatch.h"
 #include "llvm/CodeGen/SelectionDAGAddressAnalysis.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 98a795e..c179c97 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -44,7 +44,7 @@
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGTargetInfo.h"
 #include "llvm/CodeGen/StackMaps.h"
diff --git a/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
index 4268da8..671ec84fb 100644
--- a/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
@@ -26,7 +26,7 @@
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/StackMaps.h"
diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp
index 8040f1e..f0fa6aa 100644
--- a/llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -28,7 +28,7 @@
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/StackMaps.h"
 #include "llvm/CodeGen/TargetLowering.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
@@ -98,6 +98,350 @@ static cl::opt<bool> DisableStrictNodeMutation("disable-strictnode-mutation",
        cl::desc("Don't mutate strict-float node to a legalize node"),
        cl::init(false), cl::Hidden);
 
+static bool darwinHasSinCos(const Triple &TT) {
+  assert(TT.isOSDarwin() && "should be called with darwin triple");
+  // Don't bother with 32 bit x86.
+  if (TT.getArch() == Triple::x86)
+    return false;
+  // Macos < 10.9 has no sincos_stret.
+  if (TT.isMacOSX())
+    return !TT.isMacOSXVersionLT(10, 9) && TT.isArch64Bit();
+  // iOS < 7.0 has no sincos_stret.
+  if (TT.isiOS())
+    return !TT.isOSVersionLT(7, 0);
+  // Any other darwin such as WatchOS/TvOS is new enough.
+  return true;
+}
+
+void TargetLoweringBase::InitLibcalls(const Triple &TT) {
+#define HANDLE_LIBCALL(code, name) \
+  setLibcallName(RTLIB::code, name);
+#include "llvm/IR/RuntimeLibcalls.def"
+#undef HANDLE_LIBCALL
+  // Initialize calling conventions to their default.
+  for (int LC = 0; LC < RTLIB::UNKNOWN_LIBCALL; ++LC)
+    setLibcallCallingConv((RTLIB::Libcall)LC, CallingConv::C);
+
+  // Use the f128 variants of math functions on x86_64
+  if (TT.getArch() == Triple::ArchType::x86_64 && TT.isGNUEnvironment()) {
+    setLibcallName(RTLIB::REM_F128, "fmodf128");
+    setLibcallName(RTLIB::FMA_F128, "fmaf128");
+    setLibcallName(RTLIB::SQRT_F128, "sqrtf128");
+    setLibcallName(RTLIB::CBRT_F128, "cbrtf128");
+    setLibcallName(RTLIB::LOG_F128, "logf128");
+    setLibcallName(RTLIB::LOG_FINITE_F128, "__logf128_finite");
+    setLibcallName(RTLIB::LOG2_F128, "log2f128");
+    setLibcallName(RTLIB::LOG2_FINITE_F128, "__log2f128_finite");
+    setLibcallName(RTLIB::LOG10_F128, "log10f128");
+    setLibcallName(RTLIB::LOG10_FINITE_F128, "__log10f128_finite");
+    setLibcallName(RTLIB::EXP_F128, "expf128");
+    setLibcallName(RTLIB::EXP_FINITE_F128, "__expf128_finite");
+    setLibcallName(RTLIB::EXP2_F128, "exp2f128");
+    setLibcallName(RTLIB::EXP2_FINITE_F128, "__exp2f128_finite");
+    setLibcallName(RTLIB::EXP10_F128, "exp10f128");
+    setLibcallName(RTLIB::SIN_F128, "sinf128");
+    setLibcallName(RTLIB::COS_F128, "cosf128");
+    setLibcallName(RTLIB::TAN_F128, "tanf128");
+    setLibcallName(RTLIB::SINCOS_F128, "sincosf128");
+    setLibcallName(RTLIB::ASIN_F128, "asinf128");
+    setLibcallName(RTLIB::ACOS_F128, "acosf128");
+    setLibcallName(RTLIB::ATAN_F128, "atanf128");
+    setLibcallName(RTLIB::SINH_F128, "sinhf128");
+    setLibcallName(RTLIB::COSH_F128, "coshf128");
+    setLibcallName(RTLIB::TANH_F128, "tanhf128");
+    setLibcallName(RTLIB::POW_F128, "powf128");
+    setLibcallName(RTLIB::POW_FINITE_F128, "__powf128_finite");
+    setLibcallName(RTLIB::CEIL_F128, "ceilf128");
+    setLibcallName(RTLIB::TRUNC_F128, "truncf128");
+    setLibcallName(RTLIB::RINT_F128, "rintf128");
+    setLibcallName(RTLIB::NEARBYINT_F128, "nearbyintf128");
+    setLibcallName(RTLIB::ROUND_F128, "roundf128");
+    setLibcallName(RTLIB::ROUNDEVEN_F128, "roundevenf128");
+    setLibcallName(RTLIB::FLOOR_F128, "floorf128");
+    setLibcallName(RTLIB::COPYSIGN_F128, "copysignf128");
+    setLibcallName(RTLIB::FMIN_F128, "fminf128");
+    setLibcallName(RTLIB::FMAX_F128, "fmaxf128");
+    setLibcallName(RTLIB::LROUND_F128, "lroundf128");
+    setLibcallName(RTLIB::LLROUND_F128, "llroundf128");
+    setLibcallName(RTLIB::LRINT_F128, "lrintf128");
+    setLibcallName(RTLIB::LLRINT_F128, "llrintf128");
+    setLibcallName(RTLIB::LDEXP_F128, "ldexpf128");
+    setLibcallName(RTLIB::FREXP_F128, "frexpf128");
+  }
+
+  // For IEEE quad-precision libcall names, PPC uses "kf" instead of "tf".
+  if (TT.isPPC()) {
+    setLibcallName(RTLIB::ADD_F128, "__addkf3");
+    setLibcallName(RTLIB::SUB_F128, "__subkf3");
+    setLibcallName(RTLIB::MUL_F128, "__mulkf3");
+    setLibcallName(RTLIB::DIV_F128, "__divkf3");
+    setLibcallName(RTLIB::POWI_F128, "__powikf2");
+    setLibcallName(RTLIB::FPEXT_F32_F128, "__extendsfkf2");
+    setLibcallName(RTLIB::FPEXT_F64_F128, "__extenddfkf2");
+    setLibcallName(RTLIB::FPROUND_F128_F32, "__trunckfsf2");
+    setLibcallName(RTLIB::FPROUND_F128_F64, "__trunckfdf2");
+    setLibcallName(RTLIB::FPTOSINT_F128_I32, "__fixkfsi");
+    setLibcallName(RTLIB::FPTOSINT_F128_I64, "__fixkfdi");
+    setLibcallName(RTLIB::FPTOSINT_F128_I128, "__fixkfti");
+    setLibcallName(RTLIB::FPTOUINT_F128_I32, "__fixunskfsi");
+    setLibcallName(RTLIB::FPTOUINT_F128_I64, "__fixunskfdi");
+    setLibcallName(RTLIB::FPTOUINT_F128_I128, "__fixunskfti");
+    setLibcallName(RTLIB::SINTTOFP_I32_F128, "__floatsikf");
+    setLibcallName(RTLIB::SINTTOFP_I64_F128, "__floatdikf");
+    setLibcallName(RTLIB::SINTTOFP_I128_F128, "__floattikf");
+    setLibcallName(RTLIB::UINTTOFP_I32_F128, "__floatunsikf");
+    setLibcallName(RTLIB::UINTTOFP_I64_F128, "__floatundikf");
+    setLibcallName(RTLIB::UINTTOFP_I128_F128, "__floatuntikf");
+    setLibcallName(RTLIB::OEQ_F128, "__eqkf2");
+    setLibcallName(RTLIB::UNE_F128, "__nekf2");
+    setLibcallName(RTLIB::OGE_F128, "__gekf2");
+    setLibcallName(RTLIB::OLT_F128, "__ltkf2");
+    setLibcallName(RTLIB::OLE_F128, "__lekf2");
+    setLibcallName(RTLIB::OGT_F128, "__gtkf2");
+    setLibcallName(RTLIB::UO_F128, "__unordkf2");
+  }
+
+  // A few names are different on particular architectures or environments.
+  if (TT.isOSDarwin()) {
+    // For f16/f32 conversions, Darwin uses the standard naming scheme, instead
+    // of the gnueabi-style __gnu_*_ieee.
+    // FIXME: What about other targets?
+    setLibcallName(RTLIB::FPEXT_F16_F32, "__extendhfsf2");
+    setLibcallName(RTLIB::FPROUND_F32_F16, "__truncsfhf2");
+
+    // Some darwins have an optimized __bzero/bzero function.
+    switch (TT.getArch()) {
+    case Triple::x86:
+    case Triple::x86_64:
+      if (TT.isMacOSX() && !TT.isMacOSXVersionLT(10, 6))
+        setLibcallName(RTLIB::BZERO, "__bzero");
+      break;
+    case Triple::aarch64:
+    case Triple::aarch64_32:
+      setLibcallName(RTLIB::BZERO, "bzero");
+      break;
+    default:
+      break;
+    }
+
+    if (darwinHasSinCos(TT)) {
+      setLibcallName(RTLIB::SINCOS_STRET_F32, "__sincosf_stret");
+      setLibcallName(RTLIB::SINCOS_STRET_F64, "__sincos_stret");
+      if (TT.isWatchABI()) {
+        setLibcallCallingConv(RTLIB::SINCOS_STRET_F32,
+                              CallingConv::ARM_AAPCS_VFP);
+        setLibcallCallingConv(RTLIB::SINCOS_STRET_F64,
+                              CallingConv::ARM_AAPCS_VFP);
+      }
+    }
+
+    switch (TT.getOS()) {
+    case Triple::MacOSX:
+      if (TT.isMacOSXVersionLT(10, 9)) {
+        setLibcallName(RTLIB::EXP10_F32, nullptr);
+        setLibcallName(RTLIB::EXP10_F64, nullptr);
+      } else {
+        setLibcallName(RTLIB::EXP10_F32, "__exp10f");
+        setLibcallName(RTLIB::EXP10_F64, "__exp10");
+      }
+      break;
+    case Triple::IOS:
+      if (TT.isOSVersionLT(7, 0)) {
+        setLibcallName(RTLIB::EXP10_F32, nullptr);
+        setLibcallName(RTLIB::EXP10_F64, nullptr);
+        break;
+      }
+      [[fallthrough]];
+    case Triple::TvOS:
+    case Triple::WatchOS:
+    case Triple::XROS:
+      setLibcallName(RTLIB::EXP10_F32, "__exp10f");
+      setLibcallName(RTLIB::EXP10_F64, "__exp10");
+      break;
+    default:
+      break;
+    }
+  } else {
+    setLibcallName(RTLIB::FPEXT_F16_F32, "__gnu_h2f_ieee");
+    setLibcallName(RTLIB::FPROUND_F32_F16, "__gnu_f2h_ieee");
+  }
+
+  if (TT.isGNUEnvironment() || TT.isOSFuchsia() ||
+      (TT.isAndroid() && !TT.isAndroidVersionLT(9))) {
+    setLibcallName(RTLIB::SINCOS_F32, "sincosf");
+    setLibcallName(RTLIB::SINCOS_F64, "sincos");
+    setLibcallName(RTLIB::SINCOS_F80, "sincosl");
+    setLibcallName(RTLIB::SINCOS_F128, "sincosl");
+    setLibcallName(RTLIB::SINCOS_PPCF128, "sincosl");
+  }
+
+  if (TT.isPS()) {
+    setLibcallName(RTLIB::SINCOS_F32, "sincosf");
+    setLibcallName(RTLIB::SINCOS_F64, "sincos");
+  }
+
+  if (TT.isOSOpenBSD()) {
+    setLibcallName(RTLIB::STACKPROTECTOR_CHECK_FAIL, nullptr);
+  }
+
+  if (TT.isOSWindows() && !TT.isOSCygMing()) {
+    setLibcallName(RTLIB::LDEXP_F32, nullptr);
+    setLibcallName(RTLIB::LDEXP_F80, nullptr);
+    setLibcallName(RTLIB::LDEXP_F128, nullptr);
+    setLibcallName(RTLIB::LDEXP_PPCF128, nullptr);
+
+    setLibcallName(RTLIB::FREXP_F32, nullptr);
+    setLibcallName(RTLIB::FREXP_F80, nullptr);
+    setLibcallName(RTLIB::FREXP_F128, nullptr);
+    setLibcallName(RTLIB::FREXP_PPCF128, nullptr);
+  }
+
+  if (TT.isAArch64()) {
+    if (TT.isOSMSVCRT()) {
+      // MSVCRT doesn't have powi; fall back to pow
+      setLibcallName(RTLIB::POWI_F32, nullptr);
+      setLibcallName(RTLIB::POWI_F64, nullptr);
+    }
+  }
+
+  // Disable most libcalls on AMDGPU.
+  if (TT.isAMDGPU()) {
+    for (int I = 0; I < RTLIB::UNKNOWN_LIBCALL; ++I) {
+      if (I < RTLIB::ATOMIC_LOAD || I > RTLIB::ATOMIC_FETCH_NAND_16)
+        setLibcallName(static_cast<RTLIB::Libcall>(I), nullptr);
+    }
+  }
+
+  // Disable most libcalls on NVPTX.
+  if (TT.isNVPTX()) {
+    for (int I = 0; I < RTLIB::UNKNOWN_LIBCALL; ++I)
+      if (I < RTLIB::ATOMIC_LOAD || I > RTLIB::ATOMIC_FETCH_NAND_16)
+        setLibcallName(static_cast<RTLIB::Libcall>(I), nullptr);
+  }
+
+  if (TT.isARM() || TT.isThumb()) {
+    // These libcalls are not available in 32-bit.
+    setLibcallName(RTLIB::SHL_I128, nullptr);
+    setLibcallName(RTLIB::SRL_I128, nullptr);
+    setLibcallName(RTLIB::SRA_I128, nullptr);
+    setLibcallName(RTLIB::MUL_I128, nullptr);
+    setLibcallName(RTLIB::MULO_I64, nullptr);
+    setLibcallName(RTLIB::MULO_I128, nullptr);
+
+    if (TT.isOSMSVCRT()) {
+      // MSVCRT doesn't have powi; fall back to pow
+      setLibcallName(RTLIB::POWI_F32, nullptr);
+      setLibcallName(RTLIB::POWI_F64, nullptr);
+    }
+  }
+
+  if (TT.getArch() == Triple::ArchType::avr) {
+    // Division rtlib functions (not supported), use divmod functions instead
+    setLibcallName(RTLIB::SDIV_I8, nullptr);
+    setLibcallName(RTLIB::SDIV_I16, nullptr);
+    setLibcallName(RTLIB::SDIV_I32, nullptr);
+    setLibcallName(RTLIB::UDIV_I8, nullptr);
+    setLibcallName(RTLIB::UDIV_I16, nullptr);
+    setLibcallName(RTLIB::UDIV_I32, nullptr);
+
+    // Modulus rtlib functions (not supported), use divmod functions instead
+    setLibcallName(RTLIB::SREM_I8, nullptr);
+    setLibcallName(RTLIB::SREM_I16, nullptr);
+    setLibcallName(RTLIB::SREM_I32, nullptr);
+    setLibcallName(RTLIB::UREM_I8, nullptr);
+    setLibcallName(RTLIB::UREM_I16, nullptr);
+    setLibcallName(RTLIB::UREM_I32, nullptr);
+  }
+
+  if (TT.getArch() == Triple::ArchType::hexagon) {
+    // These cause problems when the shift amount is non-constant.
+    setLibcallName(RTLIB::SHL_I128, nullptr);
+    setLibcallName(RTLIB::SRL_I128, nullptr);
+    setLibcallName(RTLIB::SRA_I128, nullptr);
+  }
+
+  if (TT.isLoongArch()) {
+    if (!TT.isLoongArch64()) {
+      // Set libcalls.
+      setLibcallName(RTLIB::MUL_I128, nullptr);
+      // The MULO libcall is not part of libgcc, only compiler-rt.
+      setLibcallName(RTLIB::MULO_I64, nullptr);
+    }
+    // The MULO libcall is not part of libgcc, only compiler-rt.
+    setLibcallName(RTLIB::MULO_I128, nullptr);
+  }
+
+  if (TT.isMIPS32()) {
+    // These libcalls are not available in 32-bit.
+    setLibcallName(RTLIB::SHL_I128, nullptr);
+    setLibcallName(RTLIB::SRL_I128, nullptr);
+    setLibcallName(RTLIB::SRA_I128, nullptr);
+    setLibcallName(RTLIB::MUL_I128, nullptr);
+    setLibcallName(RTLIB::MULO_I64, nullptr);
+    setLibcallName(RTLIB::MULO_I128, nullptr);
+  }
+
+  if (TT.isPPC()) {
+    if (!TT.isPPC64()) {
+      // These libcalls are not available in 32-bit.
+      setLibcallName(RTLIB::SHL_I128, nullptr);
+      setLibcallName(RTLIB::SRL_I128, nullptr);
+      setLibcallName(RTLIB::SRA_I128, nullptr);
+      setLibcallName(RTLIB::MUL_I128, nullptr);
+      setLibcallName(RTLIB::MULO_I64, nullptr);
+    }
+    setLibcallName(RTLIB::MULO_I128, nullptr);
+  }
+
+  if (TT.isRISCV32()) {
+    // These libcalls are not available in 32-bit.
+    setLibcallName(RTLIB::SHL_I128, nullptr);
+    setLibcallName(RTLIB::SRL_I128, nullptr);
+    setLibcallName(RTLIB::SRA_I128, nullptr);
+    setLibcallName(RTLIB::MUL_I128, nullptr);
+    setLibcallName(RTLIB::MULO_I64, nullptr);
+  }
+
+  if (TT.isSPARC()) {
+    if (!TT.isSPARC64()) {
+      // These libcalls are not available in 32-bit.
+      setLibcallName(RTLIB::MULO_I64, nullptr);
+      setLibcallName(RTLIB::MUL_I128, nullptr);
+      setLibcallName(RTLIB::SHL_I128, nullptr);
+      setLibcallName(RTLIB::SRL_I128, nullptr);
+      setLibcallName(RTLIB::SRA_I128, nullptr);
+    }
+    setLibcallName(RTLIB::MULO_I128, nullptr);
+  }
+
+  if (TT.isSystemZ()) {
+    setLibcallName(RTLIB::SRL_I128, nullptr);
+    setLibcallName(RTLIB::SHL_I128, nullptr);
+    setLibcallName(RTLIB::SRA_I128, nullptr);
+  }
+
+  if (TT.isX86()) {
+    if (TT.getArch() == Triple::ArchType::x86) {
+      // These libcalls are not available in 32-bit.
+      setLibcallName(RTLIB::SHL_I128, nullptr);
+      setLibcallName(RTLIB::SRL_I128, nullptr);
+      setLibcallName(RTLIB::SRA_I128, nullptr);
+      setLibcallName(RTLIB::MUL_I128, nullptr);
+      // The MULO libcall is not part of libgcc, only compiler-rt.
+      setLibcallName(RTLIB::MULO_I64, nullptr);
+    }
+
+    // The MULO libcall is not part of libgcc, only compiler-rt.
+    setLibcallName(RTLIB::MULO_I128, nullptr);
+
+    if (TT.isOSMSVCRT()) {
+      // MSVCRT doesn't have powi; fall back to pow
+      setLibcallName(RTLIB::POWI_F32, nullptr);
+      setLibcallName(RTLIB::POWI_F64, nullptr);
+    }
+  }
+}
+
 /// GetFPLibCall - Helper to return the right libcall for the given floating
 /// point type, or UNKNOWN_LIBCALL if there is none.
 RTLIB::Libcall RTLIB::getFPLibCall(EVT VT,
@@ -574,9 +918,41 @@ RTLIB::Libcall RTLIB::getMEMSET_ELEMENT_UNORDERED_ATOMIC(uint64_t ElementSize) {
   }
 }
 
+/// InitCmpLibcallCCs - Set default comparison libcall CC.
+static void InitCmpLibcallCCs(ISD::CondCode *CCs) {
+  std::fill(CCs, CCs + RTLIB::UNKNOWN_LIBCALL, ISD::SETCC_INVALID);
+  CCs[RTLIB::OEQ_F32] = ISD::SETEQ;
+  CCs[RTLIB::OEQ_F64] = ISD::SETEQ;
+  CCs[RTLIB::OEQ_F128] = ISD::SETEQ;
+  CCs[RTLIB::OEQ_PPCF128] = ISD::SETEQ;
+  CCs[RTLIB::UNE_F32] = ISD::SETNE;
+  CCs[RTLIB::UNE_F64] = ISD::SETNE;
+  CCs[RTLIB::UNE_F128] = ISD::SETNE;
+  CCs[RTLIB::UNE_PPCF128] = ISD::SETNE;
+  CCs[RTLIB::OGE_F32] = ISD::SETGE;
+  CCs[RTLIB::OGE_F64] = ISD::SETGE;
+  CCs[RTLIB::OGE_F128] = ISD::SETGE;
+  CCs[RTLIB::OGE_PPCF128] = ISD::SETGE;
+  CCs[RTLIB::OLT_F32] = ISD::SETLT;
+  CCs[RTLIB::OLT_F64] = ISD::SETLT;
+  CCs[RTLIB::OLT_F128] = ISD::SETLT;
+  CCs[RTLIB::OLT_PPCF128] = ISD::SETLT;
+  CCs[RTLIB::OLE_F32] = ISD::SETLE;
+  CCs[RTLIB::OLE_F64] = ISD::SETLE;
+  CCs[RTLIB::OLE_F128] = ISD::SETLE;
+  CCs[RTLIB::OLE_PPCF128] = ISD::SETLE;
+  CCs[RTLIB::OGT_F32] = ISD::SETGT;
+  CCs[RTLIB::OGT_F64] = ISD::SETGT;
+  CCs[RTLIB::OGT_F128] = ISD::SETGT;
+  CCs[RTLIB::OGT_PPCF128] = ISD::SETGT;
+  CCs[RTLIB::UO_F32] = ISD::SETNE;
+  CCs[RTLIB::UO_F64] = ISD::SETNE;
+  CCs[RTLIB::UO_F128] = ISD::SETNE;
+  CCs[RTLIB::UO_PPCF128] = ISD::SETNE;
+}
+
 /// NOTE: The TargetMachine owns TLOF.
-TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm)
-    : TM(tm), Libcalls(TM.getTargetTriple()) {
+TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm) : TM(tm) {
   initActions();
 
   // Perform these initializations only once.
@@ -608,6 +984,11 @@ TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm)
 
   MinCmpXchgSizeInBits = 0;
   SupportsUnalignedAtomics = false;
+
+  std::fill(std::begin(LibcallRoutineNames), std::end(LibcallRoutineNames), nullptr);
+
+  InitLibcalls(TM.getTargetTriple());
+  InitCmpLibcallCCs(CmpLibcallCCs);
 }
 
 void TargetLoweringBase::initActions() {
diff --git a/llvm/lib/IR/CMakeLists.txt b/llvm/lib/IR/CMakeLists.txt
index 8bf199f..4eb08f6 100644
--- a/llvm/lib/IR/CMakeLists.txt
+++ b/llvm/lib/IR/CMakeLists.txt
@@ -73,7 +73,6 @@ add_llvm_component_library(LLVMCore
   VectorBuilder.cpp
   Verifier.cpp
   VFABIDemangler.cpp
-  RuntimeLibcalls.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${LLVM_MAIN_INCLUDE_DIR}/llvm/IR
diff --git a/llvm/lib/IR/RuntimeLibcalls.cpp b/llvm/lib/IR/RuntimeLibcalls.cpp
deleted file mode 100644
index de3db55..0000000
--- a/llvm/lib/IR/RuntimeLibcalls.cpp
+++ /dev/null
@@ -1,379 +0,0 @@
-//===- RuntimeLibcalls.cpp - Interface for runtime libcalls -----*- 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
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/IR/RuntimeLibcalls.h"
-
-using namespace llvm;
-using namespace RTLIB;
-
-/// Set default libcall names. If a target wants to opt-out of a libcall it
-/// should be placed here.
-void RuntimeLibcallsInfo::initLibcalls(const Triple &TT) {
-  std::fill(std::begin(LibcallRoutineNames), std::end(LibcallRoutineNames),
-            nullptr);
-
-#define HANDLE_LIBCALL(code, name) setLibcallName(RTLIB::code, name);
-#include "llvm/IR/RuntimeLibcalls.def"
-#undef HANDLE_LIBCALL
-
-  // Initialize calling conventions to their default.
-  for (int LC = 0; LC < RTLIB::UNKNOWN_LIBCALL; ++LC)
-    setLibcallCallingConv((RTLIB::Libcall)LC, CallingConv::C);
-
-  // Use the f128 variants of math functions on x86_64
-  if (TT.getArch() == Triple::ArchType::x86_64 && TT.isGNUEnvironment()) {
-    setLibcallName(RTLIB::REM_F128, "fmodf128");
-    setLibcallName(RTLIB::FMA_F128, "fmaf128");
-    setLibcallName(RTLIB::SQRT_F128, "sqrtf128");
-    setLibcallName(RTLIB::CBRT_F128, "cbrtf128");
-    setLibcallName(RTLIB::LOG_F128, "logf128");
-    setLibcallName(RTLIB::LOG_FINITE_F128, "__logf128_finite");
-    setLibcallName(RTLIB::LOG2_F128, "log2f128");
-    setLibcallName(RTLIB::LOG2_FINITE_F128, "__log2f128_finite");
-    setLibcallName(RTLIB::LOG10_F128, "log10f128");
-    setLibcallName(RTLIB::LOG10_FINITE_F128, "__log10f128_finite");
-    setLibcallName(RTLIB::EXP_F128, "expf128");
-    setLibcallName(RTLIB::EXP_FINITE_F128, "__expf128_finite");
-    setLibcallName(RTLIB::EXP2_F128, "exp2f128");
-    setLibcallName(RTLIB::EXP2_FINITE_F128, "__exp2f128_finite");
-    setLibcallName(RTLIB::EXP10_F128, "exp10f128");
-    setLibcallName(RTLIB::SIN_F128, "sinf128");
-    setLibcallName(RTLIB::COS_F128, "cosf128");
-    setLibcallName(RTLIB::TAN_F128, "tanf128");
-    setLibcallName(RTLIB::SINCOS_F128, "sincosf128");
-    setLibcallName(RTLIB::ASIN_F128, "asinf128");
-    setLibcallName(RTLIB::ACOS_F128, "acosf128");
-    setLibcallName(RTLIB::ATAN_F128, "atanf128");
-    setLibcallName(RTLIB::SINH_F128, "sinhf128");
-    setLibcallName(RTLIB::COSH_F128, "coshf128");
-    setLibcallName(RTLIB::TANH_F128, "tanhf128");
-    setLibcallName(RTLIB::POW_F128, "powf128");
-    setLibcallName(RTLIB::POW_FINITE_F128, "__powf128_finite");
-    setLibcallName(RTLIB::CEIL_F128, "ceilf128");
-    setLibcallName(RTLIB::TRUNC_F128, "truncf128");
-    setLibcallName(RTLIB::RINT_F128, "rintf128");
-    setLibcallName(RTLIB::NEARBYINT_F128, "nearbyintf128");
-    setLibcallName(RTLIB::ROUND_F128, "roundf128");
-    setLibcallName(RTLIB::ROUNDEVEN_F128, "roundevenf128");
-    setLibcallName(RTLIB::FLOOR_F128, "floorf128");
-    setLibcallName(RTLIB::COPYSIGN_F128, "copysignf128");
-    setLibcallName(RTLIB::FMIN_F128, "fminf128");
-    setLibcallName(RTLIB::FMAX_F128, "fmaxf128");
-    setLibcallName(RTLIB::LROUND_F128, "lroundf128");
-    setLibcallName(RTLIB::LLROUND_F128, "llroundf128");
-    setLibcallName(RTLIB::LRINT_F128, "lrintf128");
-    setLibcallName(RTLIB::LLRINT_F128, "llrintf128");
-    setLibcallName(RTLIB::LDEXP_F128, "ldexpf128");
-    setLibcallName(RTLIB::FREXP_F128, "frexpf128");
-  }
-
-  // For IEEE quad-precision libcall names, PPC uses "kf" instead of "tf".
-  if (TT.isPPC()) {
-    setLibcallName(RTLIB::ADD_F128, "__addkf3");
-    setLibcallName(RTLIB::SUB_F128, "__subkf3");
-    setLibcallName(RTLIB::MUL_F128, "__mulkf3");
-    setLibcallName(RTLIB::DIV_F128, "__divkf3");
-    setLibcallName(RTLIB::POWI_F128, "__powikf2");
-    setLibcallName(RTLIB::FPEXT_F32_F128, "__extendsfkf2");
-    setLibcallName(RTLIB::FPEXT_F64_F128, "__extenddfkf2");
-    setLibcallName(RTLIB::FPROUND_F128_F32, "__trunckfsf2");
-    setLibcallName(RTLIB::FPROUND_F128_F64, "__trunckfdf2");
-    setLibcallName(RTLIB::FPTOSINT_F128_I32, "__fixkfsi");
-    setLibcallName(RTLIB::FPTOSINT_F128_I64, "__fixkfdi");
-    setLibcallName(RTLIB::FPTOSINT_F128_I128, "__fixkfti");
-    setLibcallName(RTLIB::FPTOUINT_F128_I32, "__fixunskfsi");
-    setLibcallName(RTLIB::FPTOUINT_F128_I64, "__fixunskfdi");
-    setLibcallName(RTLIB::FPTOUINT_F128_I128, "__fixunskfti");
-    setLibcallName(RTLIB::SINTTOFP_I32_F128, "__floatsikf");
-    setLibcallName(RTLIB::SINTTOFP_I64_F128, "__floatdikf");
-    setLibcallName(RTLIB::SINTTOFP_I128_F128, "__floattikf");
-    setLibcallName(RTLIB::UINTTOFP_I32_F128, "__floatunsikf");
-    setLibcallName(RTLIB::UINTTOFP_I64_F128, "__floatundikf");
-    setLibcallName(RTLIB::UINTTOFP_I128_F128, "__floatuntikf");
-    setLibcallName(RTLIB::OEQ_F128, "__eqkf2");
-    setLibcallName(RTLIB::UNE_F128, "__nekf2");
-    setLibcallName(RTLIB::OGE_F128, "__gekf2");
-    setLibcallName(RTLIB::OLT_F128, "__ltkf2");
-    setLibcallName(RTLIB::OLE_F128, "__lekf2");
-    setLibcallName(RTLIB::OGT_F128, "__gtkf2");
-    setLibcallName(RTLIB::UO_F128, "__unordkf2");
-  }
-
-  // A few names are different on particular architectures or environments.
-  if (TT.isOSDarwin()) {
-    // For f16/f32 conversions, Darwin uses the standard naming scheme,
-    // instead of the gnueabi-style __gnu_*_ieee.
-    // FIXME: What about other targets?
-    setLibcallName(RTLIB::FPEXT_F16_F32, "__extendhfsf2");
-    setLibcallName(RTLIB::FPROUND_F32_F16, "__truncsfhf2");
-
-    // Some darwins have an optimized __bzero/bzero function.
-    switch (TT.getArch()) {
-    case Triple::x86:
-    case Triple::x86_64:
-      if (TT.isMacOSX() && !TT.isMacOSXVersionLT(10, 6))
-        setLibcallName(RTLIB::BZERO, "__bzero");
-      break;
-    case Triple::aarch64:
-    case Triple::aarch64_32:
-      setLibcallName(RTLIB::BZERO, "bzero");
-      break;
-    default:
-      break;
-    }
-
-    if (darwinHasSinCos(TT)) {
-      setLibcallName(RTLIB::SINCOS_STRET_F32, "__sincosf_stret");
-      setLibcallName(RTLIB::SINCOS_STRET_F64, "__sincos_stret");
-      if (TT.isWatchABI()) {
-        setLibcallCallingConv(RTLIB::SINCOS_STRET_F32,
-                              CallingConv::ARM_AAPCS_VFP);
-        setLibcallCallingConv(RTLIB::SINCOS_STRET_F64,
-                              CallingConv::ARM_AAPCS_VFP);
-      }
-    }
-
-    switch (TT.getOS()) {
-    case Triple::MacOSX:
-      if (TT.isMacOSXVersionLT(10, 9)) {
-        setLibcallName(RTLIB::EXP10_F32, nullptr);
-        setLibcallName(RTLIB::EXP10_F64, nullptr);
-      } else {
-        setLibcallName(RTLIB::EXP10_F32, "__exp10f");
-        setLibcallName(RTLIB::EXP10_F64, "__exp10");
-      }
-      break;
-    case Triple::IOS:
-      if (TT.isOSVersionLT(7, 0)) {
-        setLibcallName(RTLIB::EXP10_F32, nullptr);
-        setLibcallName(RTLIB::EXP10_F64, nullptr);
-        break;
-      }
-      [[fallthrough]];
-    case Triple::TvOS:
-    case Triple::WatchOS:
-    case Triple::XROS:
-      setLibcallName(RTLIB::EXP10_F32, "__exp10f");
-      setLibcallName(RTLIB::EXP10_F64, "__exp10");
-      break;
-    default:
-      break;
-    }
-  } else {
-    setLibcallName(RTLIB::FPEXT_F16_F32, "__gnu_h2f_ieee");
-    setLibcallName(RTLIB::FPROUND_F32_F16, "__gnu_f2h_ieee");
-  }
-
-  if (TT.isGNUEnvironment() || TT.isOSFuchsia() ||
-      (TT.isAndroid() && !TT.isAndroidVersionLT(9))) {
-    setLibcallName(RTLIB::SINCOS_F32, "sincosf");
-    setLibcallName(RTLIB::SINCOS_F64, "sincos");
-    setLibcallName(RTLIB::SINCOS_F80, "sincosl");
-    setLibcallName(RTLIB::SINCOS_F128, "sincosl");
-    setLibcallName(RTLIB::SINCOS_PPCF128, "sincosl");
-  }
-
-  if (TT.isPS()) {
-    setLibcallName(RTLIB::SINCOS_F32, "sincosf");
-    setLibcallName(RTLIB::SINCOS_F64, "sincos");
-  }
-
-  if (TT.isOSOpenBSD()) {
-    setLibcallName(RTLIB::STACKPROTECTOR_CHECK_FAIL, nullptr);
-  }
-
-  if (TT.isOSWindows() && !TT.isOSCygMing()) {
-    setLibcallName(RTLIB::LDEXP_F32, nullptr);
-    setLibcallName(RTLIB::LDEXP_F80, nullptr);
-    setLibcallName(RTLIB::LDEXP_F128, nullptr);
-    setLibcallName(RTLIB::LDEXP_PPCF128, nullptr);
-
-    setLibcallName(RTLIB::FREXP_F32, nullptr);
-    setLibcallName(RTLIB::FREXP_F80, nullptr);
-    setLibcallName(RTLIB::FREXP_F128, nullptr);
-    setLibcallName(RTLIB::FREXP_PPCF128, nullptr);
-  }
-
-  if (TT.isAArch64()) {
-    if (TT.isOSMSVCRT()) {
-      // MSVCRT doesn't have powi; fall back to pow
-      setLibcallName(RTLIB::POWI_F32, nullptr);
-      setLibcallName(RTLIB::POWI_F64, nullptr);
-    }
-  }
-
-  // Disable most libcalls on AMDGPU.
-  if (TT.isAMDGPU()) {
-    for (int I = 0; I < RTLIB::UNKNOWN_LIBCALL; ++I) {
-      if (I < RTLIB::ATOMIC_LOAD || I > RTLIB::ATOMIC_FETCH_NAND_16)
-        setLibcallName(static_cast<RTLIB::Libcall>(I), nullptr);
-    }
-  }
-
-  // Disable most libcalls on NVPTX.
-  if (TT.isNVPTX()) {
-    for (int I = 0; I < RTLIB::UNKNOWN_LIBCALL; ++I)
-      if (I < RTLIB::ATOMIC_LOAD || I > RTLIB::ATOMIC_FETCH_NAND_16)
-        setLibcallName(static_cast<RTLIB::Libcall>(I), nullptr);
-  }
-
-  if (TT.isARM() || TT.isThumb()) {
-    // These libcalls are not available in 32-bit.
-    setLibcallName(RTLIB::SHL_I128, nullptr);
-    setLibcallName(RTLIB::SRL_I128, nullptr);
-    setLibcallName(RTLIB::SRA_I128, nullptr);
-    setLibcallName(RTLIB::MUL_I128, nullptr);
-    setLibcallName(RTLIB::MULO_I64, nullptr);
-    setLibcallName(RTLIB::MULO_I128, nullptr);
-
-    if (TT.isOSMSVCRT()) {
-      // MSVCRT doesn't have powi; fall back to pow
-      setLibcallName(RTLIB::POWI_F32, nullptr);
-      setLibcallName(RTLIB::POWI_F64, nullptr);
-    }
-  }
-
-  if (TT.getArch() == Triple::ArchType::avr) {
-    // Division rtlib functions (not supported), use divmod functions instead
-    setLibcallName(RTLIB::SDIV_I8, nullptr);
-    setLibcallName(RTLIB::SDIV_I16, nullptr);
-    setLibcallName(RTLIB::SDIV_I32, nullptr);
-    setLibcallName(RTLIB::UDIV_I8, nullptr);
-    setLibcallName(RTLIB::UDIV_I16, nullptr);
-    setLibcallName(RTLIB::UDIV_I32, nullptr);
-
-    // Modulus rtlib functions (not supported), use divmod functions instead
-    setLibcallName(RTLIB::SREM_I8, nullptr);
-    setLibcallName(RTLIB::SREM_I16, nullptr);
-    setLibcallName(RTLIB::SREM_I32, nullptr);
-    setLibcallName(RTLIB::UREM_I8, nullptr);
-    setLibcallName(RTLIB::UREM_I16, nullptr);
-    setLibcallName(RTLIB::UREM_I32, nullptr);
-  }
-
-  if (TT.getArch() == Triple::ArchType::hexagon) {
-    // These cause problems when the shift amount is non-constant.
-    setLibcallName(RTLIB::SHL_I128, nullptr);
-    setLibcallName(RTLIB::SRL_I128, nullptr);
-    setLibcallName(RTLIB::SRA_I128, nullptr);
-  }
-
-  if (TT.isLoongArch()) {
-    if (!TT.isLoongArch64()) {
-      // Set libcalls.
-      setLibcallName(RTLIB::MUL_I128, nullptr);
-      // The MULO libcall is not part of libgcc, only compiler-rt.
-      setLibcallName(RTLIB::MULO_I64, nullptr);
-    }
-    // The MULO libcall is not part of libgcc, only compiler-rt.
-    setLibcallName(RTLIB::MULO_I128, nullptr);
-  }
-
-  if (TT.isMIPS32()) {
-    // These libcalls are not available in 32-bit.
-    setLibcallName(RTLIB::SHL_I128, nullptr);
-    setLibcallName(RTLIB::SRL_I128, nullptr);
-    setLibcallName(RTLIB::SRA_I128, nullptr);
-    setLibcallName(RTLIB::MUL_I128, nullptr);
-    setLibcallName(RTLIB::MULO_I64, nullptr);
-    setLibcallName(RTLIB::MULO_I128, nullptr);
-  }
-
-  if (TT.isPPC()) {
-    if (!TT.isPPC64()) {
-      // These libcalls are not available in 32-bit.
-      setLibcallName(RTLIB::SHL_I128, nullptr);
-      setLibcallName(RTLIB::SRL_I128, nullptr);
-      setLibcallName(RTLIB::SRA_I128, nullptr);
-      setLibcallName(RTLIB::MUL_I128, nullptr);
-      setLibcallName(RTLIB::MULO_I64, nullptr);
-    }
-    setLibcallName(RTLIB::MULO_I128, nullptr);
-  }
-
-  if (TT.isRISCV32()) {
-    // These libcalls are not available in 32-bit.
-    setLibcallName(RTLIB::SHL_I128, nullptr);
-    setLibcallName(RTLIB::SRL_I128, nullptr);
-    setLibcallName(RTLIB::SRA_I128, nullptr);
-    setLibcallName(RTLIB::MUL_I128, nullptr);
-    setLibcallName(RTLIB::MULO_I64, nullptr);
-  }
-
-  if (TT.isSPARC()) {
-    if (!TT.isSPARC64()) {
-      // These libcalls are not available in 32-bit.
-      setLibcallName(RTLIB::MULO_I64, nullptr);
-      setLibcallName(RTLIB::MUL_I128, nullptr);
-      setLibcallName(RTLIB::SHL_I128, nullptr);
-      setLibcallName(RTLIB::SRL_I128, nullptr);
-      setLibcallName(RTLIB::SRA_I128, nullptr);
-    }
-    setLibcallName(RTLIB::MULO_I128, nullptr);
-  }
-
-  if (TT.isSystemZ()) {
-    setLibcallName(RTLIB::SRL_I128, nullptr);
-    setLibcallName(RTLIB::SHL_I128, nullptr);
-    setLibcallName(RTLIB::SRA_I128, nullptr);
-  }
-
-  if (TT.isX86()) {
-    if (TT.getArch() == Triple::ArchType::x86) {
-      // These libcalls are not available in 32-bit.
-      setLibcallName(RTLIB::SHL_I128, nullptr);
-      setLibcallName(RTLIB::SRL_I128, nullptr);
-      setLibcallName(RTLIB::SRA_I128, nullptr);
-      setLibcallName(RTLIB::MUL_I128, nullptr);
-      // The MULO libcall is not part of libgcc, only compiler-rt.
-      setLibcallName(RTLIB::MULO_I64, nullptr);
-    }
-
-    // The MULO libcall is not part of libgcc, only compiler-rt.
-    setLibcallName(RTLIB::MULO_I128, nullptr);
-
-    if (TT.isOSMSVCRT()) {
-      // MSVCRT doesn't have powi; fall back to pow
-      setLibcallName(RTLIB::POWI_F32, nullptr);
-      setLibcallName(RTLIB::POWI_F64, nullptr);
-    }
-  }
-}
-
-void RuntimeLibcallsInfo::initCmpLibcallCCs() {
-  std::fill(CmpLibcallCCs, CmpLibcallCCs + RTLIB::UNKNOWN_LIBCALL,
-            ISD::SETCC_INVALID);
-  CmpLibcallCCs[RTLIB::OEQ_F32] = ISD::SETEQ;
-  CmpLibcallCCs[RTLIB::OEQ_F64] = ISD::SETEQ;
-  CmpLibcallCCs[RTLIB::OEQ_F128] = ISD::SETEQ;
-  CmpLibcallCCs[RTLIB::OEQ_PPCF128] = ISD::SETEQ;
-  CmpLibcallCCs[RTLIB::UNE_F32] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::UNE_F64] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::UNE_F128] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::UNE_PPCF128] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::OGE_F32] = ISD::SETGE;
-  CmpLibcallCCs[RTLIB::OGE_F64] = ISD::SETGE;
-  CmpLibcallCCs[RTLIB::OGE_F128] = ISD::SETGE;
-  CmpLibcallCCs[RTLIB::OGE_PPCF128] = ISD::SETGE;
-  CmpLibcallCCs[RTLIB::OLT_F32] = ISD::SETLT;
-  CmpLibcallCCs[RTLIB::OLT_F64] = ISD::SETLT;
-  CmpLibcallCCs[RTLIB::OLT_F128] = ISD::SETLT;
-  CmpLibcallCCs[RTLIB::OLT_PPCF128] = ISD::SETLT;
-  CmpLibcallCCs[RTLIB::OLE_F32] = ISD::SETLE;
-  CmpLibcallCCs[RTLIB::OLE_F64] = ISD::SETLE;
-  CmpLibcallCCs[RTLIB::OLE_F128] = ISD::SETLE;
-  CmpLibcallCCs[RTLIB::OLE_PPCF128] = ISD::SETLE;
-  CmpLibcallCCs[RTLIB::OGT_F32] = ISD::SETGT;
-  CmpLibcallCCs[RTLIB::OGT_F64] = ISD::SETGT;
-  CmpLibcallCCs[RTLIB::OGT_F128] = ISD::SETGT;
-  CmpLibcallCCs[RTLIB::OGT_PPCF128] = ISD::SETGT;
-  CmpLibcallCCs[RTLIB::UO_F32] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::UO_F64] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::UO_F128] = ISD::SETNE;
-  CmpLibcallCCs[RTLIB::UO_PPCF128] = ISD::SETNE;
-}
diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index d303f22..4ffacbb 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -30,7 +30,6 @@
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/Mangler.h"
 #include "llvm/IR/Metadata.h"
-#include "llvm/IR/RuntimeLibcalls.h"
 #include "llvm/LTO/LTOBackend.h"
 #include "llvm/LTO/SummaryBasedOptimizations.h"
 #include "llvm/Linker/IRMover.h"
@@ -1358,13 +1357,14 @@ Error LTO::runRegularLTO(AddStreamFn AddStream) {
   return finalizeOptimizationRemarks(std::move(DiagnosticOutputFile));
 }
 
-SmallVector<const char *> LTO::getRuntimeLibcallSymbols(const Triple &TT) {
-  RTLIB::RuntimeLibcallsInfo Libcalls(TT);
+static const char *libcallRoutineNames[] = {
+#define HANDLE_LIBCALL(code, name) name,
+#include "llvm/IR/RuntimeLibcalls.def"
+#undef HANDLE_LIBCALL
+};
 
-  SmallVector<const char *> LibcallSymbols;
-  copy_if(Libcalls.getLibcallNames(), std::back_inserter(LibcallSymbols),
-          [](const char *Name) { return Name; });
-  return LibcallSymbols;
+ArrayRef<const char*> LTO::getRuntimeLibcallSymbols() {
+  return ArrayRef(libcallRoutineNames);
 }
 
 /// This class defines the interface to the ThinLTO backend.
diff --git a/llvm/lib/Object/IRSymtab.cpp b/llvm/lib/Object/IRSymtab.cpp
index 2a2b235..7e29da4 100644
--- a/llvm/lib/Object/IRSymtab.cpp
+++ b/llvm/lib/Object/IRSymtab.cpp
@@ -22,7 +22,6 @@
 #include "llvm/IR/Mangler.h"
 #include "llvm/IR/Metadata.h"
 #include "llvm/IR/Module.h"
-#include "llvm/IR/RuntimeLibcalls.h"
 #include "llvm/MC/StringTableBuilder.h"
 #include "llvm/Object/ModuleSymbolTable.h"
 #include "llvm/Object/SymbolicFile.h"
@@ -47,6 +46,9 @@ static cl::opt<bool> DisableBitcodeVersionUpgrade(
     cl::desc("Disable automatic bitcode upgrade for version mismatch"));
 
 static const char *PreservedSymbols[] = {
+#define HANDLE_LIBCALL(code, name) name,
+#include "llvm/IR/RuntimeLibcalls.def"
+#undef HANDLE_LIBCALL
     // There are global variables, so put it here instead of in
     // RuntimeLibcalls.def.
     // TODO: Are there similar such variables?
@@ -213,16 +215,9 @@ Expected<int> Builder::getComdatIndex(const Comdat *C, const Module *M) {
   return P.first->second;
 }
 
-static DenseSet<StringRef> buildPreservedSymbolsSet(const Triple &TT) {
-  DenseSet<StringRef> PreservedSymbolSet(std::begin(PreservedSymbols),
-                                         std::end(PreservedSymbols));
-
-  RTLIB::RuntimeLibcallsInfo Libcalls(TT);
-  for (const char *Name : Libcalls.getLibcallNames()) {
-    if (Name)
-      PreservedSymbolSet.insert(Name);
-  }
-  return PreservedSymbolSet;
+static DenseSet<StringRef> buildPreservedSymbolsSet() {
+  return DenseSet<StringRef>(std::begin(PreservedSymbols),
+                             std::end(PreservedSymbols));
 }
 
 Error Builder::addSymbol(const ModuleSymbolTable &Msymtab,
@@ -281,8 +276,7 @@ Error Builder::addSymbol(const ModuleSymbolTable &Msymtab,
   setStr(Sym.IRName, GV->getName());
 
   static const DenseSet<StringRef> PreservedSymbolsSet =
-      buildPreservedSymbolsSet(
-          llvm::Triple(GV->getParent()->getTargetTriple()));
+      buildPreservedSymbolsSet();
   bool IsPreservedSymbol = PreservedSymbolsSet.contains(GV->getName());
 
   if (Used.count(GV) || IsPreservedSymbol)
diff --git a/llvm/lib/Target/AArch64/AArch64FastISel.cpp b/llvm/lib/Target/AArch64/AArch64FastISel.cpp
index 527496f..e3c5a14 100644
--- a/llvm/lib/Target/AArch64/AArch64FastISel.cpp
+++ b/llvm/lib/Target/AArch64/AArch64FastISel.cpp
@@ -35,7 +35,7 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/CodeGenTypes/MachineValueType.h"
 #include "llvm/IR/Argument.h"
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index 84de1ee..dbaf311 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -48,7 +48,7 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetCallingConv.h"
diff --git a/llvm/lib/Target/ARM/ARMFastISel.cpp b/llvm/lib/Target/ARM/ARMFastISel.cpp
index 1cc21da..61d2928 100644
--- a/llvm/lib/Target/ARM/ARMFastISel.cpp
+++ b/llvm/lib/Target/ARM/ARMFastISel.cpp
@@ -40,7 +40,7 @@
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"
 #include "llvm/CodeGen/TargetLowering.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 75d16a4..2683b57 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -53,7 +53,7 @@
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGAddressAnalysis.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
diff --git a/llvm/lib/Target/ARM/ARMLegalizerInfo.h b/llvm/lib/Target/ARM/ARMLegalizerInfo.h
index 9e10638..d6ce4eb 100644
--- a/llvm/lib/Target/ARM/ARMLegalizerInfo.h
+++ b/llvm/lib/Target/ARM/ARMLegalizerInfo.h
@@ -16,7 +16,7 @@
 #include "llvm/ADT/IndexedMap.h"
 #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
 #include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/IR/Instructions.h"
 
 namespace llvm {
diff --git a/llvm/lib/Target/ARM/ARMSelectionDAGInfo.h b/llvm/lib/Target/ARM/ARMSelectionDAGInfo.h
index 275b1c0..ffa8b50 100644
--- a/llvm/lib/Target/ARM/ARMSelectionDAGInfo.h
+++ b/llvm/lib/Target/ARM/ARMSelectionDAGInfo.h
@@ -14,7 +14,7 @@
 #define LLVM_LIB_TARGET_ARM_ARMSELECTIONDAGINFO_H
 
 #include "MCTargetDesc/ARMAddressingModes.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAGTargetInfo.h"
 
 namespace llvm {
diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
index 7aeaebc..918fc12 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -27,7 +27,7 @@
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/TargetCallingConv.h"
 #include "llvm/CodeGen/ValueTypes.h"
@@ -39,12 +39,12 @@
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalValue.h"
-#include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/InlineAsm.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/IntrinsicsHexagon.h"
+#include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"
diff --git a/llvm/lib/Target/Lanai/LanaiISelLowering.cpp b/llvm/lib/Target/Lanai/LanaiISelLowering.cpp
index f6763a3..c784835 100644
--- a/llvm/lib/Target/Lanai/LanaiISelLowering.cpp
+++ b/llvm/lib/Target/Lanai/LanaiISelLowering.cpp
@@ -27,7 +27,7 @@
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetCallingConv.h"
diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
index 6072e5e..d5d047b 100644
--- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
+++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
@@ -22,7 +22,7 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/CodeGen/ISDOpcodes.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/IntrinsicsLoongArch.h"
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index 0f2047f..8cb64a0 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -40,7 +40,7 @@
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetFrameLowering.h"
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index 898d1f8..564c0f7 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -48,7 +48,7 @@
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
index ba3ab51..53619eaa 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
@@ -21,7 +21,7 @@
 #include "WebAssemblyRuntimeLibcallSignatures.h"
 #include "WebAssemblySubtarget.h"
 #include "WebAssemblyUtilities.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 
 using namespace llvm;
 
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.h b/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.h
index 966b84a..ff6515d 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.h
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.h
@@ -16,7 +16,7 @@
 
 #include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/CodeGen/RuntimeLibcallUtil.h"
+#include "llvm/CodeGen/RuntimeLibcalls.h"
 
 namespace llvm {
 
diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index d68cff8..ece6dd0 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -691,7 +691,7 @@ extern const char *lto_input_get_dependent_library(lto_input_t input,
 }
 
 extern const char *const *lto_runtime_lib_symbols_list(size_t *size) {
-  auto symbols = lto::LTO::getRuntimeLibcallSymbols(Triple());
+  auto symbols = lto::LTO::getRuntimeLibcallSymbols();
   *size = symbols.size();
   return symbols.data();
 }