IntrinsicLowering.cpp now lives in lib/CodeGen/

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14269 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/IntrinsicLowering.cpp b/lib/VMCore/IntrinsicLowering.cpp
deleted file mode 100644 (file)
index 6af333e..0000000
--- a/lib/VMCore/IntrinsicLowering.cpp
+++ /dev/null
@@ -1,214 +0,0 @@
-//===-- IntrinsicLowering.cpp - Intrinsic Lowering default implementation -===//
-// 
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
-//===----------------------------------------------------------------------===//
-//
-// This file implements the default intrinsic lowering implementation.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/IntrinsicLowering.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Module.h"
-#include "llvm/iOther.h"
-using namespace llvm;
-
-template <class ArgIt>
-static Function *EnsureFunctionExists(Module &M, const char *Name,
-                                      ArgIt ArgBegin, ArgIt ArgEnd,
-                                      const Type *RetTy) {
-  if (Function *F = M.getNamedFunction(Name)) return F;
-  // It doesn't already exist in the program, insert a new definition now.
-  std::vector<const Type *> ParamTys;
-  for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
-    ParamTys.push_back(I->getType());
-  return M.getOrInsertFunction(Name, FunctionType::get(RetTy, ParamTys, false));
-}
-
-/// ReplaceCallWith - This function is used when we want to lower an intrinsic
-/// call to a call of an external function.  This handles hard cases such as
-/// when there was already a prototype for the external function, and if that
-/// prototype doesn't match the arguments we expect to pass in.
-template <class ArgIt>
-static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
-                                 ArgIt ArgBegin, ArgIt ArgEnd,
-                                 const Type *RetTy, Function *&FCache) {
-  if (!FCache) {
-    // If we haven't already looked up this function, check to see if the
-    // program already contains a function with this name.
-    Module *M = CI->getParent()->getParent()->getParent();
-    FCache = M->getNamedFunction(NewFn);
-    if (!FCache) {
-      // It doesn't already exist in the program, insert a new definition now.
-      std::vector<const Type *> ParamTys;
-      for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
-        ParamTys.push_back((*I)->getType());
-      FCache = M->getOrInsertFunction(NewFn,
-                                     FunctionType::get(RetTy, ParamTys, false));
-    }
-   }
-
-  const FunctionType *FT = FCache->getFunctionType();
-  std::vector<Value*> Operands;
-  unsigned ArgNo = 0;
-  for (ArgIt I = ArgBegin; I != ArgEnd && ArgNo != FT->getNumParams();
-       ++I, ++ArgNo) {
-    Value *Arg = *I;
-    if (Arg->getType() != FT->getParamType(ArgNo))
-      Arg = new CastInst(Arg, FT->getParamType(ArgNo), Arg->getName(), CI);
-    Operands.push_back(Arg);
-  }
-  // Pass nulls into any additional arguments...
-  for (; ArgNo != FT->getNumParams(); ++ArgNo)
-    Operands.push_back(Constant::getNullValue(FT->getParamType(ArgNo)));
-
-  std::string Name = CI->getName(); CI->setName("");
-  if (FT->getReturnType() == Type::VoidTy) Name.clear();
-  CallInst *NewCI = new CallInst(FCache, Operands, Name, CI);
-  if (!CI->use_empty()) {
-    Value *V = NewCI;
-    if (CI->getType() != NewCI->getType())
-      V = new CastInst(NewCI, CI->getType(), Name, CI);
-    CI->replaceAllUsesWith(V);
-  }
-  return NewCI;
-}
-
-void DefaultIntrinsicLowering::AddPrototypes(Module &M) {
-  for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
-    if (I->isExternal() && !I->use_empty())
-      switch (I->getIntrinsicID()) {
-      default: break;
-      case Intrinsic::setjmp:
-        EnsureFunctionExists(M, "setjmp", I->abegin(), I->aend(), Type::IntTy);
-        break;
-      case Intrinsic::longjmp:
-        EnsureFunctionExists(M, "longjmp", I->abegin(), I->aend(),Type::VoidTy);
-        break;
-      case Intrinsic::siglongjmp:
-        EnsureFunctionExists(M, "abort", I->aend(), I->aend(), Type::VoidTy);
-        break;
-      case Intrinsic::memcpy:
-        EnsureFunctionExists(M, "memcpy", I->abegin(), --I->aend(),
-                             I->abegin()->getType());
-        break;
-      case Intrinsic::memmove:
-        EnsureFunctionExists(M, "memmove", I->abegin(), --I->aend(),
-                             I->abegin()->getType());
-        break;
-      case Intrinsic::memset:
-        EnsureFunctionExists(M, "memset", I->abegin(), --I->aend(),
-                             I->abegin()->getType());
-        break;
-      case Intrinsic::isunordered:
-        EnsureFunctionExists(M, "isunordered", I->abegin(), I->aend(), Type::BoolTy);
-        break;
-      }
-
-}
-
-void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
-  Function *Callee = CI->getCalledFunction();
-  assert(Callee && "Cannot lower an indirect call!");
-  
-  switch (Callee->getIntrinsicID()) {
-  case Intrinsic::not_intrinsic:
-    std::cerr << "Cannot lower a call to a non-intrinsic function '"
-              << Callee->getName() << "'!\n";
-    abort();
-  default:
-    std::cerr << "Error: Code generator does not support intrinsic function '"
-              << Callee->getName() << "'!\n";
-    abort();
-
-    // The setjmp/longjmp intrinsics should only exist in the code if it was
-    // never optimized (ie, right out of the CFE), or if it has been hacked on
-    // by the lowerinvoke pass.  In both cases, the right thing to do is to
-    // convert the call to an explicit setjmp or longjmp call.
-  case Intrinsic::setjmp: {
-    static Function *SetjmpFCache = 0;
-    Value *V = ReplaceCallWith("setjmp", CI, CI->op_begin()+1, CI->op_end(),
-                               Type::IntTy, SetjmpFCache);
-    if (CI->getType() != Type::VoidTy)
-      CI->replaceAllUsesWith(V);
-    break;
-  }
-  case Intrinsic::sigsetjmp: 
-     if (CI->getType() != Type::VoidTy)
-       CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
-     break;
-
-  case Intrinsic::longjmp: {
-    static Function *LongjmpFCache = 0;
-    ReplaceCallWith("longjmp", CI, CI->op_begin()+1, CI->op_end(),
-                    Type::VoidTy, LongjmpFCache);
-    break;
-  }
-
-  case Intrinsic::siglongjmp: {
-    // Insert the call to abort
-    static Function *AbortFCache = 0;
-    ReplaceCallWith("abort", CI, CI->op_end(), CI->op_end(), Type::VoidTy,
-                    AbortFCache);
-    break;
-  }
-
-  case Intrinsic::returnaddress:
-  case Intrinsic::frameaddress:
-    std::cerr << "WARNING: this target does not support the llvm."
-              << (Callee->getIntrinsicID() == Intrinsic::returnaddress ? 
-                  "return" : "frame") << "address intrinsic.\n";
-    CI->replaceAllUsesWith(ConstantPointerNull::get(
-                                            cast<PointerType>(CI->getType())));
-    break;
-
-  case Intrinsic::dbg_stoppoint:
-  case Intrinsic::dbg_region_start:
-  case Intrinsic::dbg_region_end:
-  case Intrinsic::dbg_declare:
-  case Intrinsic::dbg_func_start:
-    if (CI->getType() != Type::VoidTy)
-      CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
-    break;    // Simply strip out debugging intrinsics
-
-  case Intrinsic::memcpy: {
-    // The memcpy intrinsic take an extra alignment argument that the memcpy
-    // libc function does not.
-    static Function *MemcpyFCache = 0;
-    ReplaceCallWith("memcpy", CI, CI->op_begin()+1, CI->op_end()-1,
-                    (*(CI->op_begin()+1))->getType(), MemcpyFCache);
-    break;
-  }
-  case Intrinsic::memmove: {
-    // The memmove intrinsic take an extra alignment argument that the memmove
-    // libc function does not.
-    static Function *MemmoveFCache = 0;
-    ReplaceCallWith("memmove", CI, CI->op_begin()+1, CI->op_end()-1,
-                    (*(CI->op_begin()+1))->getType(), MemmoveFCache);
-    break;
-  }
-  case Intrinsic::memset: {
-    // The memset intrinsic take an extra alignment argument that the memset
-    // libc function does not.
-    static Function *MemsetFCache = 0;
-    ReplaceCallWith("memset", CI, CI->op_begin()+1, CI->op_end()-1,
-                    (*(CI->op_begin()+1))->getType(), MemsetFCache);
-    break;
-  }
-  case Intrinsic::isunordered: {
-    static Function *isunorderedFCache = 0;
-    ReplaceCallWith("isunordered", CI, CI->op_begin()+1, CI->op_end(),
-                    Type::BoolTy, isunorderedFCache);
-    break;
-  }
-  }
-  
-  assert(CI->use_empty() &&
-         "Lowering should have eliminated any uses of the intrinsic call!");
-  CI->getParent()->getInstList().erase(CI);
-}