From 51342f1fd7f38153003f9780d83babc222139bb1 Mon Sep 17 00:00:00 2001
From: Josh Stone <jistone@redhat.com>
Date: Thu, 30 Nov 2017 17:28:28 -0800
Subject: [PATCH] rustllvm: Remove conditional code for LLVM < 3.9

We bumped the minimum LLVM to 3.9 in #45326.  This just cleans up the
conditional code in the rustllvm C++ wrappers to assume at least 3.9.
---
 src/rustllvm/ArchiveWrapper.cpp | 49 ---------------------
 src/rustllvm/PassWrapper.cpp    | 21 ---------
 src/rustllvm/RustWrapper.cpp    | 75 +--------------------------------
 src/rustllvm/rustllvm.h         |  4 --
 4 files changed, 1 insertion(+), 148 deletions(-)

diff --git a/src/rustllvm/ArchiveWrapper.cpp b/src/rustllvm/ArchiveWrapper.cpp
index 591ebdc9ddb2..b110013ceaed 100644
--- a/src/rustllvm/ArchiveWrapper.cpp
+++ b/src/rustllvm/ArchiveWrapper.cpp
@@ -24,11 +24,7 @@ struct RustArchiveMember {
 
   RustArchiveMember()
       : Filename(nullptr), Name(nullptr),
-#if LLVM_VERSION_GE(3, 8)
         Child(nullptr, nullptr, nullptr)
-#else
-        Child(nullptr, nullptr)
-#endif
   {
   }
   ~RustArchiveMember() {}
@@ -38,13 +34,9 @@ struct RustArchiveIterator {
   bool First;
   Archive::child_iterator Cur;
   Archive::child_iterator End;
-#if LLVM_VERSION_GE(3, 9)
   Error Err;
 
   RustArchiveIterator() : First(true), Err(Error::success()) {}
-#else
-  RustArchiveIterator() : First(true) {}
-#endif
 };
 
 enum class LLVMRustArchiveKind {
@@ -84,19 +76,11 @@ extern "C" LLVMRustArchiveRef LLVMRustOpenArchive(char *Path) {
     return nullptr;
   }
 
-#if LLVM_VERSION_LE(3, 8)
-  ErrorOr<std::unique_ptr<Archive>> ArchiveOr =
-#else
   Expected<std::unique_ptr<Archive>> ArchiveOr =
-#endif
       Archive::create(BufOr.get()->getMemBufferRef());
 
   if (!ArchiveOr) {
-#if LLVM_VERSION_LE(3, 8)
-    LLVMRustSetLastError(ArchiveOr.getError().message().c_str());
-#else
     LLVMRustSetLastError(toString(ArchiveOr.takeError()).c_str());
-#endif
     return nullptr;
   }
 
@@ -114,16 +98,12 @@ extern "C" LLVMRustArchiveIteratorRef
 LLVMRustArchiveIteratorNew(LLVMRustArchiveRef RustArchive) {
   Archive *Archive = RustArchive->getBinary();
   RustArchiveIterator *RAI = new RustArchiveIterator();
-#if LLVM_VERSION_LE(3, 8)
-  RAI->Cur = Archive->child_begin();
-#else
   RAI->Cur = Archive->child_begin(RAI->Err);
   if (RAI->Err) {
     LLVMRustSetLastError(toString(std::move(RAI->Err)).c_str());
     delete RAI;
     return nullptr;
   }
-#endif
   RAI->End = Archive->child_end();
   return RAI;
 }
@@ -141,12 +121,10 @@ LLVMRustArchiveIteratorNext(LLVMRustArchiveIteratorRef RAI) {
   // but instead advance it *before* fetching the child in all later calls.
   if (!RAI->First) {
     ++RAI->Cur;
-#if LLVM_VERSION_GE(3, 9)
     if (RAI->Err) {
       LLVMRustSetLastError(toString(std::move(RAI->Err)).c_str());
       return nullptr;
     }
-#endif
   } else {
     RAI->First = false;
   }
@@ -154,16 +132,7 @@ LLVMRustArchiveIteratorNext(LLVMRustArchiveIteratorRef RAI) {
   if (RAI->Cur == RAI->End)
     return nullptr;
 
-#if LLVM_VERSION_EQ(3, 8)
-  const ErrorOr<Archive::Child> *Cur = RAI->Cur.operator->();
-  if (!*Cur) {
-    LLVMRustSetLastError(Cur->getError().message().c_str());
-    return nullptr;
-  }
-  const Archive::Child &Child = Cur->get();
-#else
   const Archive::Child &Child = *RAI->Cur.operator->();
-#endif
   Archive::Child *Ret = new Archive::Child(Child);
 
   return Ret;
@@ -239,18 +208,13 @@ LLVMRustWriteArchive(char *Dst, size_t NumMembers,
                      const LLVMRustArchiveMemberRef *NewMembers,
                      bool WriteSymbtab, LLVMRustArchiveKind RustKind) {
 
-#if LLVM_VERSION_LE(3, 8)
-  std::vector<NewArchiveIterator> Members;
-#else
   std::vector<NewArchiveMember> Members;
-#endif
   auto Kind = fromRust(RustKind);
 
   for (size_t I = 0; I < NumMembers; I++) {
     auto Member = NewMembers[I];
     assert(Member->Name);
     if (Member->Filename) {
-#if LLVM_VERSION_GE(3, 9)
       Expected<NewArchiveMember> MOrErr =
           NewArchiveMember::getFile(Member->Filename, true);
       if (!MOrErr) {
@@ -261,15 +225,7 @@ LLVMRustWriteArchive(char *Dst, size_t NumMembers,
       MOrErr->MemberName = sys::path::filename(MOrErr->MemberName);
 #endif
       Members.push_back(std::move(*MOrErr));
-#elif LLVM_VERSION_EQ(3, 8)
-      Members.push_back(NewArchiveIterator(Member->Filename));
-#else
-      Members.push_back(NewArchiveIterator(Member->Filename, Member->Name));
-#endif
     } else {
-#if LLVM_VERSION_LE(3, 8)
-      Members.push_back(NewArchiveIterator(Member->Child, Member->Name));
-#else
       Expected<NewArchiveMember> MOrErr =
           NewArchiveMember::getOldMember(Member->Child, true);
       if (!MOrErr) {
@@ -277,14 +233,9 @@ LLVMRustWriteArchive(char *Dst, size_t NumMembers,
         return LLVMRustResult::Failure;
       }
       Members.push_back(std::move(*MOrErr));
-#endif
     }
   }
-#if LLVM_VERSION_GE(3, 8)
   auto Pair = writeArchive(Dst, Members, WriteSymbtab, Kind, true, false);
-#else
-  auto Pair = writeArchive(Dst, Members, WriteSymbtab, Kind, true);
-#endif
   if (!Pair.second)
     return LLVMRustResult::Success;
   LLVMRustSetLastError(Pair.second.message().c_str());
diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index 4a359fb3ad30..402516add79a 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -58,9 +58,6 @@ extern "C" void LLVMInitializePasses() {
   initializeVectorization(Registry);
   initializeIPO(Registry);
   initializeAnalysis(Registry);
-#if LLVM_VERSION_EQ(3, 7)
-  initializeIPA(Registry);
-#endif
   initializeTransformUtils(Registry);
   initializeInstCombine(Registry);
   initializeInstrumentation(Registry);
@@ -272,18 +269,10 @@ enum class LLVMRustRelocMode {
   ROPIRWPI,
 };
 
-#if LLVM_VERSION_LE(3, 8)
-static Reloc::Model fromRust(LLVMRustRelocMode RustReloc) {
-#else
 static Optional<Reloc::Model> fromRust(LLVMRustRelocMode RustReloc) {
-#endif
   switch (RustReloc) {
   case LLVMRustRelocMode::Default:
-#if LLVM_VERSION_LE(3, 8)
-    return Reloc::Default;
-#else
     return None;
-#endif
   case LLVMRustRelocMode::Static:
     return Reloc::Static;
   case LLVMRustRelocMode::PIC:
@@ -389,9 +378,6 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
   }
 
   TargetOptions Options;
-#if LLVM_VERSION_LE(3, 8)
-  Options.PositionIndependentExecutable = PositionIndependentExecutable;
-#endif
 
   Options.FloatABIType = FloatABI::Default;
   if (UseSoftFloat) {
@@ -719,10 +705,6 @@ extern "C" void LLVMRustRunRestrictionPass(LLVMModuleRef M, char **Symbols,
                                            size_t Len) {
   llvm::legacy::PassManager passes;
 
-#if LLVM_VERSION_LE(3, 8)
-  ArrayRef<const char *> Ref(Symbols, Len);
-  passes.add(llvm::createInternalizePass(Ref));
-#else
   auto PreserveFunctions = [=](const GlobalValue &GV) {
     for (size_t I = 0; I < Len; I++) {
       if (GV.getName() == Symbols[I]) {
@@ -733,7 +715,6 @@ extern "C" void LLVMRustRunRestrictionPass(LLVMModuleRef M, char **Symbols,
   };
 
   passes.add(llvm::createInternalizePass(PreserveFunctions));
-#endif
 
   passes.run(*unwrap(M));
 }
@@ -769,9 +750,7 @@ extern "C" LLVMTargetDataRef LLVMRustGetModuleDataLayout(LLVMModuleRef M) {
 }
 
 extern "C" void LLVMRustSetModulePIELevel(LLVMModuleRef M) {
-#if LLVM_VERSION_GE(3, 9)
   unwrap(M)->setPIELevel(PIELevel::Level::Large);
-#endif
 }
 
 extern "C" bool
diff --git a/src/rustllvm/RustWrapper.cpp b/src/rustllvm/RustWrapper.cpp
index 424b226bcf77..ee48d49da469 100644
--- a/src/rustllvm/RustWrapper.cpp
+++ b/src/rustllvm/RustWrapper.cpp
@@ -609,9 +609,6 @@ LLVMRustDIBuilderCreateSubroutineType(LLVMRustDIBuilderRef Builder,
                                       LLVMMetadataRef File,
                                       LLVMMetadataRef ParameterTypes) {
   return wrap(Builder->createSubroutineType(
-#if LLVM_VERSION_EQ(3, 7)
-      unwrapDI<DIFile>(File),
-#endif
       DITypeRefArray(unwrap<MDTuple>(ParameterTypes))));
 }
 
@@ -621,7 +618,6 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateFunction(
     LLVMMetadataRef Ty, bool IsLocalToUnit, bool IsDefinition,
     unsigned ScopeLine, LLVMRustDIFlags Flags, bool IsOptimized,
     LLVMValueRef Fn, LLVMMetadataRef TParam, LLVMMetadataRef Decl) {
-#if LLVM_VERSION_GE(3, 8)
   DITemplateParameterArray TParams =
       DITemplateParameterArray(unwrap<MDTuple>(TParam));
   DISubprogram *Sub = Builder->createFunction(
@@ -631,13 +627,6 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateFunction(
       unwrapDIPtr<DISubprogram>(Decl));
   unwrap<Function>(Fn)->setSubprogram(Sub);
   return wrap(Sub);
-#else
-  return wrap(Builder->createFunction(
-      unwrapDI<DIScope>(Scope), Name, LinkageName, unwrapDI<DIFile>(File),
-      LineNo, unwrapDI<DISubroutineType>(Ty), IsLocalToUnit, IsDefinition,
-      ScopeLine, fromRust(Flags), IsOptimized, unwrap<Function>(Fn),
-      unwrapDIPtr<MDNode>(TParam), unwrapDIPtr<MDNode>(Decl)));
-#endif
 }
 
 extern "C" LLVMMetadataRef
@@ -741,7 +730,6 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateVariable(
     const char *Name, LLVMMetadataRef File, unsigned LineNo,
     LLVMMetadataRef Ty, bool AlwaysPreserve, LLVMRustDIFlags Flags,
     unsigned ArgNo, uint32_t AlignInBits) {
-#if LLVM_VERSION_GE(3, 8)
   if (Tag == 0x100) { // DW_TAG_auto_variable
     return wrap(Builder->createAutoVariable(
         unwrapDI<DIDescriptor>(Scope), Name, unwrapDI<DIFile>(File), LineNo,
@@ -756,11 +744,6 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateVariable(
         unwrapDI<DIDescriptor>(Scope), Name, ArgNo, unwrapDI<DIFile>(File),
         LineNo, unwrapDI<DIType>(Ty), AlwaysPreserve, fromRust(Flags)));
   }
-#else
-  return wrap(Builder->createLocalVariable(
-      Tag, unwrapDI<DIDescriptor>(Scope), Name, unwrapDI<DIFile>(File), LineNo,
-      unwrapDI<DIType>(Ty), AlwaysPreserve, fromRust(Flags), ArgNo));
-#endif
 }
 
 extern "C" LLVMMetadataRef
@@ -935,11 +918,8 @@ extern "C" bool LLVMRustLinkInExternalBitcode(LLVMModuleRef DstRef, char *BC,
   DiagnosticPrinterRawOStream DP(Stream);
 #if LLVM_VERSION_GE(4, 0)
   if (Linker::linkModules(*Dst, std::move(Src))) {
-#elif LLVM_VERSION_GE(3, 8)
-  if (Linker::linkModules(*Dst, std::move(Src.get()))) {
 #else
-  if (Linker::LinkModules(Dst, Src->get(),
-                          [&](const DiagnosticInfo &DI) { DI.print(DP); })) {
+  if (Linker::linkModules(*Dst, std::move(Src.get()))) {
 #endif
     LLVMRustSetLastError(Err.c_str());
     return false;
@@ -1086,20 +1066,14 @@ static LLVMRustDiagnosticKind toRust(DiagnosticKind Kind) {
     return LLVMRustDiagnosticKind::OptimizationRemarkMissed;
   case DK_OptimizationRemarkAnalysis:
     return LLVMRustDiagnosticKind::OptimizationRemarkAnalysis;
-#if LLVM_VERSION_GE(3, 8)
   case DK_OptimizationRemarkAnalysisFPCommute:
     return LLVMRustDiagnosticKind::OptimizationRemarkAnalysisFPCommute;
   case DK_OptimizationRemarkAnalysisAliasing:
     return LLVMRustDiagnosticKind::OptimizationRemarkAnalysisAliasing;
-#endif
   default:
-#if LLVM_VERSION_GE(3, 9)
     return (Kind >= DK_FirstRemark && Kind <= DK_LastRemark)
                ? LLVMRustDiagnosticKind::OptimizationRemarkOther
                : LLVMRustDiagnosticKind::Other;
-#else
-    return LLVMRustDiagnosticKind::Other;
-#endif
   }
 }
 
@@ -1144,10 +1118,8 @@ extern "C" LLVMTypeKind LLVMRustGetTypeKind(LLVMTypeRef Ty) {
     return LLVMVectorTypeKind;
   case Type::X86_MMXTyID:
     return LLVMX86_MMXTypeKind;
-#if LLVM_VERSION_GE(3, 8)
   case Type::TokenTyID:
     return LLVMTokenTypeKind;
-#endif
   }
   report_fatal_error("Unhandled TypeID.");
 }
@@ -1184,7 +1156,6 @@ extern "C" LLVMValueRef LLVMRustBuildCleanupPad(LLVMBuilderRef B,
                                                 unsigned ArgCount,
                                                 LLVMValueRef *LLArgs,
                                                 const char *Name) {
-#if LLVM_VERSION_GE(3, 8)
   Value **Args = unwrap(LLArgs);
   if (ParentPad == nullptr) {
     Type *Ty = Type::getTokenTy(unwrap(B)->getContext());
@@ -1192,43 +1163,28 @@ extern "C" LLVMValueRef LLVMRustBuildCleanupPad(LLVMBuilderRef B,
   }
   return wrap(unwrap(B)->CreateCleanupPad(
       unwrap(ParentPad), ArrayRef<Value *>(Args, ArgCount), Name));
-#else
-  return nullptr;
-#endif
 }
 
 extern "C" LLVMValueRef LLVMRustBuildCleanupRet(LLVMBuilderRef B,
                                                 LLVMValueRef CleanupPad,
                                                 LLVMBasicBlockRef UnwindBB) {
-#if LLVM_VERSION_GE(3, 8)
   CleanupPadInst *Inst = cast<CleanupPadInst>(unwrap(CleanupPad));
   return wrap(unwrap(B)->CreateCleanupRet(Inst, unwrap(UnwindBB)));
-#else
-  return nullptr;
-#endif
 }
 
 extern "C" LLVMValueRef
 LLVMRustBuildCatchPad(LLVMBuilderRef B, LLVMValueRef ParentPad,
                       unsigned ArgCount, LLVMValueRef *LLArgs, const char *Name) {
-#if LLVM_VERSION_GE(3, 8)
   Value **Args = unwrap(LLArgs);
   return wrap(unwrap(B)->CreateCatchPad(
       unwrap(ParentPad), ArrayRef<Value *>(Args, ArgCount), Name));
-#else
-  return nullptr;
-#endif
 }
 
 extern "C" LLVMValueRef LLVMRustBuildCatchRet(LLVMBuilderRef B,
                                               LLVMValueRef Pad,
                                               LLVMBasicBlockRef BB) {
-#if LLVM_VERSION_GE(3, 8)
   return wrap(unwrap(B)->CreateCatchRet(cast<CatchPadInst>(unwrap(Pad)),
                                               unwrap(BB)));
-#else
-  return nullptr;
-#endif
 }
 
 extern "C" LLVMValueRef LLVMRustBuildCatchSwitch(LLVMBuilderRef B,
@@ -1236,27 +1192,20 @@ extern "C" LLVMValueRef LLVMRustBuildCatchSwitch(LLVMBuilderRef B,
                                                  LLVMBasicBlockRef BB,
                                                  unsigned NumHandlers,
                                                  const char *Name) {
-#if LLVM_VERSION_GE(3, 8)
   if (ParentPad == nullptr) {
     Type *Ty = Type::getTokenTy(unwrap(B)->getContext());
     ParentPad = wrap(Constant::getNullValue(Ty));
   }
   return wrap(unwrap(B)->CreateCatchSwitch(unwrap(ParentPad), unwrap(BB),
                                                  NumHandlers, Name));
-#else
-  return nullptr;
-#endif
 }
 
 extern "C" void LLVMRustAddHandler(LLVMValueRef CatchSwitchRef,
                                    LLVMBasicBlockRef Handler) {
-#if LLVM_VERSION_GE(3, 8)
   Value *CatchSwitch = unwrap(CatchSwitchRef);
   cast<CatchSwitchInst>(CatchSwitch)->addHandler(unwrap(Handler));
-#endif
 }
 
-#if LLVM_VERSION_GE(3, 8)
 extern "C" OperandBundleDef *LLVMRustBuildOperandBundleDef(const char *Name,
                                                            LLVMValueRef *Inputs,
                                                            unsigned NumInputs) {
@@ -1288,28 +1237,6 @@ LLVMRustBuildInvoke(LLVMBuilderRef B, LLVMValueRef Fn, LLVMValueRef *Args,
                                       makeArrayRef(unwrap(Args), NumArgs),
                                       Bundles, Name));
 }
-#else
-extern "C" void *LLVMRustBuildOperandBundleDef(const char *Name,
-                                               LLVMValueRef *Inputs,
-                                               unsigned NumInputs) {
-  return nullptr;
-}
-
-extern "C" void LLVMRustFreeOperandBundleDef(void *Bundle) {}
-
-extern "C" LLVMValueRef LLVMRustBuildCall(LLVMBuilderRef B, LLVMValueRef Fn,
-                                          LLVMValueRef *Args, unsigned NumArgs,
-                                          void *Bundle, const char *Name) {
-  return LLVMBuildCall(B, Fn, Args, NumArgs, Name);
-}
-
-extern "C" LLVMValueRef
-LLVMRustBuildInvoke(LLVMBuilderRef B, LLVMValueRef Fn, LLVMValueRef *Args,
-                    unsigned NumArgs, LLVMBasicBlockRef Then,
-                    LLVMBasicBlockRef Catch, void *Bundle, const char *Name) {
-  return LLVMBuildInvoke(B, Fn, Args, NumArgs, Then, Catch, Name);
-}
-#endif
 
 extern "C" void LLVMRustPositionBuilderAtStart(LLVMBuilderRef B,
                                                LLVMBasicBlockRef BB) {
diff --git a/src/rustllvm/rustllvm.h b/src/rustllvm/rustllvm.h
index 20816af2f1c2..8c2f855c226b 100644
--- a/src/rustllvm/rustllvm.h
+++ b/src/rustllvm/rustllvm.h
@@ -57,11 +57,7 @@
 
 #define LLVM_VERSION_LT(major, minor) (!LLVM_VERSION_GE((major), (minor)))
 
-#if LLVM_VERSION_GE(3, 7)
 #include "llvm/IR/LegacyPassManager.h"
-#else
-#include "llvm/PassManager.h"
-#endif
 
 #if LLVM_VERSION_GE(4, 0)
 #include "llvm/Bitcode/BitcodeReader.h"