Know some identities about tokenfactor nodes.

[oota-llvm.git] / lib / CodeGen / IntrinsicLowering.cpp

diff --git a/lib/CodeGen/IntrinsicLowering.cpp b/lib/CodeGen/IntrinsicLowering.cpp
index b199ad383311117f97717af885b172e85d203d39..63ff815291381b682516a1df70af21de4e472a54 100644 (file)
--- a/lib/CodeGen/IntrinsicLowering.cpp
+++ b/lib/CodeGen/IntrinsicLowering.cpp
@@ -11,13 +11,27 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/IntrinsicLowering.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Module.h"
-#include "llvm/iOther.h"
+#include "llvm/Instructions.h"
+#include <iostream>
+
 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
@@ -39,7 +53,7 @@ static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
       FCache = M->getOrInsertFunction(NewFn,
                                      FunctionType::get(RetTy, ParamTys, false));
     }
-  }
+   }
 
   const FunctionType *FT = FCache->getFunctionType();
   std::vector<Value*> Operands;
@@ -57,16 +71,53 @@ static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
 
   std::string Name = CI->getName(); CI->setName("");
   if (FT->getReturnType() == Type::VoidTy) Name.clear();
-  return new CallInst(FCache, Operands, Name, CI);
+  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!");
   
-  Module *M = Callee->getParent();
-
   switch (Callee->getIntrinsicID()) {
   case Intrinsic::not_intrinsic:
     std::cerr << "Cannot lower a call to a non-intrinsic function '"
@@ -94,18 +145,20 @@ void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
        CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
      break;
 
-  case Intrinsic::longjmp:
+  case Intrinsic::longjmp: {
     static Function *LongjmpFCache = 0;
     ReplaceCallWith("longjmp", CI, CI->op_begin()+1, CI->op_end(),
                     Type::VoidTy, LongjmpFCache);
     break;
+  }
 
-  case Intrinsic::siglongjmp:
+  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:
@@ -125,21 +178,23 @@ void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
       CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
     break;    // Simply strip out debugging intrinsics
 
-  case Intrinsic::memcpy:
+  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:
+  }
+  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:
+  }
+  case Intrinsic::memset: {
     // The memset intrinsic take an extra alignment argument that the memset
     // libc function does not.
     static Function *MemsetFCache = 0;
@@ -147,6 +202,13 @@ void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
                     (*(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!");