Handle overflow of 64-bit loop conditions.
[oota-llvm.git] / lib / VMCore / AutoUpgrade.cpp
index 63ffdf664b1dcb53c018f6ab72b445a00ccbff62..dd366071b76b7b328209ec236362d75cb71a56e5 100644 (file)
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Chandler Carruth and is distributed under the 
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -16,8 +16,9 @@
 #include "llvm/Function.h"
 #include "llvm/Module.h"
 #include "llvm/Instructions.h"
-#include "llvm/ParameterAttributes.h"
 #include "llvm/Intrinsics.h"
+#include "llvm/ADT/SmallVector.h"
+#include <cstring>
 using namespace llvm;
 
 
@@ -38,6 +39,44 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
   Module *M = F->getParent();
   switch (Name[5]) {
   default: break;
+  case 'a':
+    // This upgrades the llvm.atomic.lcs, llvm.atomic.las, llvm.atomic.lss,
+    // and atomics with default address spaces to their new names to their new
+    // function name (e.g. llvm.atomic.add.i32 => llvm.atomic.add.i32.p0i32)
+    if (Name.compare(5,7,"atomic.",7) == 0) {
+      if (Name.compare(12,3,"lcs",3) == 0) {
+        std::string::size_type delim = Name.find('.',12);
+        F->setName("llvm.atomic.cmp.swap" + Name.substr(delim) +
+                   ".p0" + Name.substr(delim+1));
+        NewFn = F;
+        return true;
+      }
+      else if (Name.compare(12,3,"las",3) == 0) {
+        std::string::size_type delim = Name.find('.',12);
+        F->setName("llvm.atomic.load.add"+Name.substr(delim)
+                   + ".p0" + Name.substr(delim+1));
+        NewFn = F;
+        return true;
+      }
+      else if (Name.compare(12,3,"lss",3) == 0) {
+        std::string::size_type delim = Name.find('.',12);
+        F->setName("llvm.atomic.load.sub"+Name.substr(delim)
+                   + ".p0" + Name.substr(delim+1));
+        NewFn = F;
+        return true;
+      }
+      else if (Name.rfind(".p") == std::string::npos) {
+        // We don't have an address space qualifier so this has be upgraded
+        // to the new name.  Copy the type name at the end of the intrinsic
+        // and add to it
+        std::string::size_type delim = Name.find_last_of('.');
+        assert(delim != std::string::npos && "can not find type");
+        F->setName(Name + ".p0" + Name.substr(delim+1));
+        NewFn = F;
+        return true;
+      }
+    }
+    break;
   case 'b':
     //  This upgrades the name of the llvm.bswap intrinsic function to only use 
     //  a single type name for overloading. We only care about the old format
@@ -121,7 +160,7 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
     if (Name.compare(5,10,"x86.mmx.ps",10) == 0 &&
         (Name.compare(13,4,"psll", 4) == 0 ||
          Name.compare(13,4,"psra", 4) == 0 ||
-         Name.compare(13,4,"psrl", 4) == 0)) {
+         Name.compare(13,4,"psrl", 4) == 0) && Name[17] != 'i') {
       
       const llvm::Type *VT = VectorType::get(IntegerType::get(64), 1);
       
@@ -147,8 +186,16 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
                                                     VT,
                                                     (Type *)0));
       return true;
-    } else if (Name.compare(5,16,"x86.sse2.movl.dq",16) == 0) {
-      // Calls to this intrinsic are transformed into ShuffleVector's.
+    } else if (Name.compare(5,17,"x86.sse2.loadh.pd",17) == 0 ||
+               Name.compare(5,17,"x86.sse2.loadl.pd",17) == 0 ||
+               Name.compare(5,16,"x86.sse2.movl.dq",16) == 0 ||
+               Name.compare(5,15,"x86.sse2.movs.d",15) == 0 ||
+               Name.compare(5,16,"x86.sse2.shuf.pd",16) == 0 ||
+               Name.compare(5,18,"x86.sse2.unpckh.pd",18) == 0 ||
+               Name.compare(5,18,"x86.sse2.unpckl.pd",18) == 0 ||
+               Name.compare(5,20,"x86.sse2.punpckh.qdq",20) == 0 ||
+               Name.compare(5,20,"x86.sse2.punpckl.qdq",20) == 0) {
+      // Calls to these intrinsics are transformed into ShuffleVector's.
       NewFn = 0;
       return true;
     }
@@ -170,8 +217,8 @@ bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
   // Upgrade intrinsic attributes.  This does not change the function.
   if (NewFn)
     F = NewFn;
-  if (unsigned id = F->getIntrinsicID(true))
-    F->setParamAttrs(Intrinsic::getParamAttrs((Intrinsic::ID)id));
+  if (unsigned id = F->getIntrinsicID())
+    F->setAttributes(Intrinsic::getAttributes((Intrinsic::ID)id));
   return Upgraded;
 }
 
@@ -183,23 +230,92 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
   assert(F && "CallInst has no function associated with it.");
 
   if (!NewFn) {
-    if (strcmp(F->getNameStart(), "llvm.x86.sse2.movl.dq") == 0) {
+    bool isLoadH = false, isLoadL = false, isMovL = false;
+    bool isMovSD = false, isShufPD = false;
+    bool isUnpckhPD = false, isUnpcklPD = false;
+    bool isPunpckhQPD = false, isPunpcklQPD = false;
+    if (strcmp(F->getNameStart(), "llvm.x86.sse2.loadh.pd") == 0)
+      isLoadH = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.loadl.pd") == 0)
+      isLoadL = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.movl.dq") == 0)
+      isMovL = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.movs.d") == 0)
+      isMovSD = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.shuf.pd") == 0)
+      isShufPD = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.unpckh.pd") == 0)
+      isUnpckhPD = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.unpckl.pd") == 0)
+      isUnpcklPD = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.punpckh.qdq") == 0)
+      isPunpckhQPD = true;
+    else if (strcmp(F->getNameStart(), "llvm.x86.sse2.punpckl.qdq") == 0)
+      isPunpcklQPD = true;
+
+    if (isLoadH || isLoadL || isMovL || isMovSD || isShufPD ||
+        isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
       std::vector<Constant*> Idxs;
-      Constant *Zero = ConstantInt::get(Type::Int32Ty, 0);
-      Idxs.push_back(Zero);
-      Idxs.push_back(Zero);
-      Idxs.push_back(Zero);
-      Idxs.push_back(Zero);
-      Value *ZeroV = ConstantVector::get(Idxs);
-
-      Idxs.clear(); 
-      Idxs.push_back(ConstantInt::get(Type::Int32Ty, 4));
-      Idxs.push_back(ConstantInt::get(Type::Int32Ty, 5));
-      Idxs.push_back(ConstantInt::get(Type::Int32Ty, 2));
-      Idxs.push_back(ConstantInt::get(Type::Int32Ty, 3));
-      Value *Mask = ConstantVector::get(Idxs);
-      ShuffleVectorInst *SI = new ShuffleVectorInst(ZeroV, CI->getOperand(1),
-                                                    Mask, "upgraded", CI);
+      Value *Op0 = CI->getOperand(1);
+      ShuffleVectorInst *SI = NULL;
+      if (isLoadH || isLoadL) {
+        Value *Op1 = UndefValue::get(Op0->getType());
+        Value *Addr = new BitCastInst(CI->getOperand(2), 
+                                      PointerType::getUnqual(Type::DoubleTy),
+                                      "upgraded.", CI);
+        Value *Load = new LoadInst(Addr, "upgraded.", false, 8, CI);
+        Value *Idx = ConstantInt::get(Type::Int32Ty, 0);
+        Op1 = InsertElementInst::Create(Op1, Load, Idx, "upgraded.", CI);
+
+        if (isLoadH) {
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 0));
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 2));
+        } else {
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 2));
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 1));
+        }
+        Value *Mask = ConstantVector::get(Idxs);
+        SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
+      } else if (isMovL) {
+        Constant *Zero = ConstantInt::get(Type::Int32Ty, 0);
+        Idxs.push_back(Zero);
+        Idxs.push_back(Zero);
+        Idxs.push_back(Zero);
+        Idxs.push_back(Zero);
+        Value *ZeroV = ConstantVector::get(Idxs);
+
+        Idxs.clear(); 
+        Idxs.push_back(ConstantInt::get(Type::Int32Ty, 4));
+        Idxs.push_back(ConstantInt::get(Type::Int32Ty, 5));
+        Idxs.push_back(ConstantInt::get(Type::Int32Ty, 2));
+        Idxs.push_back(ConstantInt::get(Type::Int32Ty, 3));
+        Value *Mask = ConstantVector::get(Idxs);
+        SI = new ShuffleVectorInst(ZeroV, Op0, Mask, "upgraded.", CI);
+      } else if (isMovSD ||
+                 isUnpckhPD || isUnpcklPD || isPunpckhQPD || isPunpcklQPD) {
+        Value *Op1 = CI->getOperand(2);
+        if (isMovSD) {
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 2));
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 1));
+        } else if (isUnpckhPD || isPunpckhQPD) {
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 1));
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 3));
+        } else {
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 0));
+          Idxs.push_back(ConstantInt::get(Type::Int32Ty, 2));
+        }
+        Value *Mask = ConstantVector::get(Idxs);
+        SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
+      } else if (isShufPD) {
+        Value *Op1 = CI->getOperand(2);
+        unsigned MaskVal = cast<ConstantInt>(CI->getOperand(3))->getZExtValue();
+        Idxs.push_back(ConstantInt::get(Type::Int32Ty, MaskVal & 1));
+        Idxs.push_back(ConstantInt::get(Type::Int32Ty, ((MaskVal >> 1) & 1)+2));
+        Value *Mask = ConstantVector::get(Idxs);
+        SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
+      }
+
+      assert(SI && "Unexpected!");
 
       // Handle any uses of the old CallInst.
       if (!CI->use_empty())
@@ -215,7 +331,7 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
     return;
   }
 
-  switch(NewFn->getIntrinsicID()) {
+  switch (NewFn->getIntrinsicID()) {
   default:  assert(0 && "Unknown function for CallInst upgrade.");
   case Intrinsic::x86_mmx_psll_d:
   case Intrinsic::x86_mmx_psll_q:
@@ -225,19 +341,19 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
   case Intrinsic::x86_mmx_psrl_d:
   case Intrinsic::x86_mmx_psrl_q:
   case Intrinsic::x86_mmx_psrl_w: {
-    SmallVector<Value*, 2> Operands;
+    Value *Operands[2];
     
-    Operands.push_back(CI->getOperand(1));
+    Operands[0] = CI->getOperand(1);
     
     // Cast the second parameter to the correct type.
     BitCastInst *BC = new BitCastInst(CI->getOperand(2), 
                                       NewFn->getFunctionType()->getParamType(1),
-                                      "upgraded", CI);
-    Operands.push_back(BC);
+                                      "upgraded.", CI);
+    Operands[1] = BC;
     
     //  Construct a new CallInst
-    CallInst *NewCI = new CallInst(NewFn, Operands.begin(), Operands.end()
-                                   "upgraded."+CI->getName(), CI);
+    CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+2
+                                       "upgraded."+CI->getName(), CI);
     NewCI->setTailCall(CI->isTailCall());
     NewCI->setCallingConv(CI->getCallingConv());
     
@@ -253,27 +369,25 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
   }        
   case Intrinsic::ctlz:
   case Intrinsic::ctpop:
-  case Intrinsic::cttz:
+  case Intrinsic::cttz: {
     //  Build a small vector of the 1..(N-1) operands, which are the 
     //  parameters.
-    SmallVector<Value*, 8>   Operands(CI->op_begin()+1, CI->op_end());
+    SmallVector<Value*, 8> Operands(CI->op_begin()+1, CI->op_end());
 
     //  Construct a new CallInst
-    CallInst *NewCI = new CallInst(NewFn, Operands.begin(), Operands.end(), 
-                                   "upgraded."+CI->getName(), CI);
+    CallInst *NewCI = CallInst::Create(NewFn, Operands.begin(), Operands.end(),
+                                       "upgraded."+CI->getName(), CI);
     NewCI->setTailCall(CI->isTailCall());
     NewCI->setCallingConv(CI->getCallingConv());
 
     //  Handle any uses of the old CallInst.
     if (!CI->use_empty()) {
       //  Check for sign extend parameter attributes on the return values.
-      bool SrcSExt = NewFn->getParamAttrs() &&
-                     NewFn->getParamAttrs()->paramHasAttr(0,ParamAttr::SExt);
-      bool DestSExt = F->getParamAttrs() &&
-                      F->getParamAttrs()->paramHasAttr(0,ParamAttr::SExt);
+      bool SrcSExt = NewFn->getAttributes().paramHasAttr(0, Attribute::SExt);
+      bool DestSExt = F->getAttributes().paramHasAttr(0, Attribute::SExt);
       
       //  Construct an appropriate cast from the new return type to the old.
-      CastInst *RetCast = CastInst::create(
+      CastInst *RetCast = CastInst::Create(
                             CastInst::getCastOpcode(NewCI, SrcSExt,
                                                     F->getReturnType(),
                                                     DestSExt),
@@ -288,7 +402,8 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
 
     //  Clean up the old call now that it has been completely upgraded.
     CI->eraseFromParent();
-    break;
+  }
+  break;
   }
 }
 
@@ -313,4 +428,3 @@ void llvm::UpgradeCallsToIntrinsic(Function* F) {
     }
   }
 }
-