//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
+// This file was developed by Chandler Carruth and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//===----------------------------------------------------------------------===//
-#include "llvm/Assembly/AutoUpgrade.h"
-#include "llvm/DerivedTypes.h"
+#include "llvm/AutoUpgrade.h"
#include "llvm/Function.h"
#include "llvm/Module.h"
#include "llvm/Instructions.h"
+#include "llvm/ParameterAttributes.h"
#include "llvm/Intrinsics.h"
-#include "llvm/SymbolTable.h"
-#include <iostream>
-
using namespace llvm;
-// Utility function for getting the correct suffix given a type
-static inline const char *getTypeSuffix(const Type* Ty) {
- switch (Ty->getTypeID()) {
- case Type::ULongTyID: return ".i64";
- case Type::UIntTyID: return ".i32";
- case Type::UShortTyID: return ".i16";
- case Type::UByteTyID: return ".i8";
- case Type::FloatTyID: return ".f32";
- case Type::DoubleTyID: return ".f64";
- default: break;
- }
- return 0;
-}
-static Function *getUpgradedUnaryFn(Function *F) {
- std::string Name = F->getName()+getTypeSuffix(F->getReturnType());
- Module *M = F->getParent();
- switch (F->getReturnType()->getTypeID()) {
- default: return 0;
- case Type::UByteTyID:
- case Type::SByteTyID:
- return M->getOrInsertFunction(Name,
- Type::UByteTy, Type::UByteTy, NULL);
- case Type::UShortTyID:
- case Type::ShortTyID:
- return M->getOrInsertFunction(Name,
- Type::UShortTy, Type::UShortTy, NULL);
- case Type::UIntTyID:
- case Type::IntTyID:
- return M->getOrInsertFunction(Name,
- Type::UIntTy, Type::UIntTy, NULL);
- case Type::ULongTyID:
- case Type::LongTyID:
- return M->getOrInsertFunction(Name,
- Type::ULongTy, Type::ULongTy, NULL);
-}
-}
-
-static Function *getUpgradedIntrinsic(Function *F) {
- // If there's no function, we can't get the argument type.
- if (!F) return 0;
+Function* llvm::UpgradeIntrinsicFunction(Function *F) {
+ assert(F && "Illegal to upgrade a non-existent Function.");
// Get the Function's name.
const std::string& Name = F->getName();
+ // Convenience
+ const FunctionType *FTy = F->getFunctionType();
+
// Quickly eliminate it, if it's not a candidate.
if (Name.length() <= 8 || Name[0] != 'l' || Name[1] != 'l' ||
Name[2] != 'v' || Name[3] != 'm' || Name[4] != '.')
switch (Name[5]) {
default: break;
case 'b':
- if (Name == "llvm.bswap") return getUpgradedUnaryFn(F);
- break;
- case 'c':
- if (Name == "llvm.ctpop" || Name == "llvm.ctlz" || Name == "llvm.cttz")
- return getUpgradedUnaryFn(F);
- break;
- case 'i':
- if (Name == "llvm.isunordered" && F->arg_begin() != F->arg_end()) {
- if (F->arg_begin()->getType() == Type::FloatTy)
- return M->getOrInsertFunction(Name+".f32", F->getFunctionType());
- if (F->arg_begin()->getType() == Type::DoubleTy)
- return M->getOrInsertFunction(Name+".f64", F->getFunctionType());
+ // 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
+ // 'llvm.bswap.i*.i*', so check for 'bswap.' and then for there being
+ // a '.' after 'bswap.'
+ if (Name.compare(5,6,"bswap.",6) == 0) {
+ std::string::size_type delim = Name.find('.',11);
+
+ if (delim != std::string::npos) {
+ // Construct the new name as 'llvm.bswap' + '.i*'
+ F->setName(Name.substr(0,10)+Name.substr(delim));
+ return F;
+ }
}
break;
- case 'm':
- if (Name == "llvm.memcpy" || Name == "llvm.memset" ||
- Name == "llvm.memmove") {
- if (F->getFunctionType()->getParamType(2) == Type::UIntTy)
- return M->getOrInsertFunction(Name+".i32", F->getFunctionType());
- if (F->getFunctionType()->getParamType(2) == Type::ULongTy)
- return M->getOrInsertFunction(Name+".i64", F->getFunctionType());
+
+ case 'c':
+ // We only want to fix the 'llvm.ct*' intrinsics which do not have the
+ // correct return type, so we check for the name, and then check if the
+ // return type does not match the parameter type.
+ if ( (Name.compare(5,5,"ctpop",5) == 0 ||
+ Name.compare(5,4,"ctlz",4) == 0 ||
+ Name.compare(5,4,"cttz",4) == 0) &&
+ FTy->getReturnType() != FTy->getParamType(0)) {
+ // We first need to change the name of the old (bad) intrinsic, because
+ // its type is incorrect, but we cannot overload that name. We
+ // arbitrarily unique it here allowing us to construct a correctly named
+ // and typed function below.
+ F->setName("");
+
+ // Now construct the new intrinsic with the correct name and type. We
+ // leave the old function around in order to query its type, whatever it
+ // may be, and correctly convert up to the new type.
+ return cast<Function>(M->getOrInsertFunction(Name,
+ FTy->getParamType(0),
+ FTy->getParamType(0),
+ (Type *)0));
}
break;
- case 's':
- if (Name == "llvm.sqrt")
- return getUpgradedUnaryFn(F);
- break;
- }
- return 0;
-}
-
-// This assumes the Function is one of the intrinsics we upgraded.
-static inline const Type* getTypeFromFunction(Function *F) {
- const Type* Ty = F->getReturnType();
- if (Ty->isFloatingPoint())
- return Ty;
- if (Ty->isSigned())
- return Ty->getUnsignedVersion();
- if (Ty->isInteger())
- return Ty;
- if (Ty == Type::BoolTy) {
- Function::const_arg_iterator ArgIt = F->arg_begin();
- if (ArgIt != F->arg_end())
- return ArgIt->getType();
- }
- return 0;
-}
-
-// UpgradeIntrinsicFunction - Convert overloaded intrinsic function names to
-// their non-overloaded variants by appending the appropriate suffix based on
-// the argument types.
-Function *llvm::UpgradeIntrinsicFunction(Function* F) {
- // See if its one of the name's we're interested in.
- if (Function *R = getUpgradedIntrinsic(F)) {
- std::cerr << "WARNING: change " << F->getName() << " to "
- << R->getName() << "\n";
- return R;
- }
- return 0;
-}
+ case 'p':
+ // This upgrades the llvm.part.select overloaded intrinsic names to only
+ // use one type specifier in the name. We only care about the old format
+ // 'llvm.part.select.i*.i*', and solve as above with bswap.
+ if (Name.compare(5,12,"part.select.",12) == 0) {
+ std::string::size_type delim = Name.find('.',17);
+
+ if (delim != std::string::npos) {
+ // Construct a new name as 'llvm.part.select' + '.i*'
+ F->setName(Name.substr(0,16)+Name.substr(delim));
+ return F;
+ }
+ break;
+ }
-Instruction* llvm::MakeUpgradedCall(Function *F,
- const std::vector<Value*> &Params,
- BasicBlock *BB, bool isTailCall,
- unsigned CallingConv) {
- assert(F && "Need a Function to make a CallInst");
- assert(BB && "Need a BasicBlock to make a CallInst");
-
- // Convert the params
- bool signedArg = false;
- std::vector<Value*> Oprnds;
- for (std::vector<Value*>::const_iterator PI = Params.begin(),
- PE = Params.end(); PI != PE; ++PI) {
- const Type* opTy = (*PI)->getType();
- if (opTy->isSigned()) {
- signedArg = true;
- CastInst* cast =
- new CastInst(*PI,opTy->getUnsignedVersion(), "autoupgrade_cast");
- BB->getInstList().push_back(cast);
- Oprnds.push_back(cast);
+ // This upgrades the llvm.part.set intrinsics similarly as above, however
+ // we care about 'llvm.part.set.i*.i*.i*', but only the first two types
+ // must match. There is an additional type specifier after these two
+ // matching types that we must retain when upgrading. Thus, we require
+ // finding 2 periods, not just one, after the intrinsic name.
+ if (Name.compare(5,9,"part.set.",9) == 0) {
+ std::string::size_type delim = Name.find('.',14);
+
+ if (delim != std::string::npos &&
+ Name.find('.',delim+1) != std::string::npos) {
+ // Construct a new name as 'llvm.part.select' + '.i*.i*'
+ F->setName(Name.substr(0,13)+Name.substr(delim));
+ return F;
+ }
+ break;
}
- else
- Oprnds.push_back(*PI);
- }
- Instruction *result = new CallInst(F, Oprnds);
- if (result->getType() != Type::VoidTy) result->setName("autoupgrade_call");
- if (isTailCall) cast<CallInst>(result)->setTailCall();
- if (CallingConv) cast<CallInst>(result)->setCallingConv(CallingConv);
- if (signedArg) {
- const Type* newTy = F->getReturnType()->getUnsignedVersion();
- CastInst* final = new CastInst(result, newTy, "autoupgrade_uncast");
- BB->getInstList().push_back(result);
- result = final;
+ break;
}
- return result;
+
+ // This may not belong here. This function is effectively being overloaded
+ // to both detect an intrinsic which needs upgrading, and to provide the
+ // upgraded form of the intrinsic. We should perhaps have two separate
+ // functions for this.
+ return 0;
}
-// UpgradeIntrinsicCall - In the BC reader, change a call to some intrinsic to
-// be a called to the specified intrinsic. We expect the callees to have the
-// same number of arguments, but their types may be different.
+// UpgradeIntrinsicCall - Upgrade a call to an old intrinsic to be a call the
+// upgraded intrinsic. All argument and return casting must be provided in
+// order to seamlessly integrate with existing context.
void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
+ assert(NewFn && "Cannot upgrade an intrinsic call without a new function.");
+
Function *F = CI->getCalledFunction();
+ assert(F && "CallInst has no function associated with it.");
+ const FunctionType *FTy = F->getFunctionType();
const FunctionType *NewFnTy = NewFn->getFunctionType();
- std::vector<Value*> Oprnds;
- for (unsigned i = 1, e = CI->getNumOperands(); i != e; ++i) {
- Value *V = CI->getOperand(i);
- if (V->getType() != NewFnTy->getParamType(i-1))
- V = new CastInst(V, NewFnTy->getParamType(i-1), V->getName(), CI);
- Oprnds.push_back(V);
- }
- CallInst *NewCI = new CallInst(NewFn, Oprnds, CI->getName(), CI);
- NewCI->setTailCall(CI->isTailCall());
- NewCI->setCallingConv(CI->getCallingConv());
- if (!CI->use_empty()) {
- Instruction *RetVal = NewCI;
- if (F->getReturnType() != NewFn->getReturnType()) {
- RetVal = new CastInst(NewCI, NewFn->getReturnType(),
+ switch(NewFn->getIntrinsicID()) {
+ default: assert(0 && "Unknown function for CallInst upgrade.");
+ case Intrinsic::ctlz:
+ case Intrinsic::ctpop:
+ 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());
+
+ // Construct a new CallInst
+ CallInst *NewCI = new CallInst(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 = NewFnTy->getParamAttrs() &&
+ NewFnTy->getParamAttrs()->paramHasAttr(0,ParamAttr::SExt);
+ bool DestSExt = FTy->getParamAttrs() &&
+ FTy->getParamAttrs()->paramHasAttr(0,ParamAttr::SExt);
+
+ // Construct an appropriate cast from the new return type to the old.
+ CastInst *RetCast = CastInst::create(
+ CastInst::getCastOpcode(NewCI, SrcSExt,
+ F->getReturnType(),
+ DestSExt),
+ NewCI, F->getReturnType(),
NewCI->getName(), CI);
- NewCI->moveBefore(RetVal);
+ NewCI->moveBefore(RetCast);
+
+ // Replace all uses of the old call with the new cast which has the
+ // correct type.
+ CI->replaceAllUsesWith(RetCast);
}
- CI->replaceAllUsesWith(RetVal);
+
+ // Clean up the old call now that it has been completely upgraded.
+ CI->eraseFromParent();
+ break;
}
- CI->eraseFromParent();
}
-bool llvm::UpgradeCallsToIntrinsic(Function* F) {
- if (Function* newF = UpgradeIntrinsicFunction(F)) {
- for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
- UI != UE; ) {
- if (CallInst* CI = dyn_cast<CallInst>(*UI++)) {
- std::vector<Value*> Oprnds;
- User::op_iterator OI = CI->op_begin();
- ++OI;
- for (User::op_iterator OE = CI->op_end(); OI != OE; ++OI) {
- const Type* opTy = OI->get()->getType();
- if (opTy->isSigned()) {
- Oprnds.push_back(
- new CastInst(OI->get(),opTy->getUnsignedVersion(),
- "autoupgrade_cast",CI));
- } else {
- Oprnds.push_back(*OI);
- }
- }
- CallInst* newCI = new CallInst(newF, Oprnds,
- CI->hasName() ? "autoupcall" : "", CI);
- newCI->setTailCall(CI->isTailCall());
- newCI->setCallingConv(CI->getCallingConv());
- if (CI->use_empty()) {
- // noop
- } else if (CI->getType() != newCI->getType()) {
- CastInst *final = new CastInst(newCI, CI->getType(),
- "autoupgrade_uncast", newCI);
- newCI->moveBefore(final);
- CI->replaceAllUsesWith(final);
- } else {
- CI->replaceAllUsesWith(newCI);
- }
- CI->eraseFromParent();
+// This tests each Function to determine if it needs upgrading. When we find
+// one we are interested in, we then upgrade all calls to reflect the new
+// function.
+void llvm::UpgradeCallsToIntrinsic(Function* F) {
+ assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
+
+ // Upgrade the function and check if it is a totaly new function.
+ if (Function* NewFn = UpgradeIntrinsicFunction(F)) {
+ if (NewFn != F) {
+ // Replace all uses to the old function with the new one if necessary.
+ for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
+ UI != UE; ) {
+ if (CallInst* CI = dyn_cast<CallInst>(*UI++))
+ UpgradeIntrinsicCall(CI, NewFn);
}
- }
- if (newF != F)
+ // Remove old function, no longer used, from the module.
F->eraseFromParent();
- return true;
+ }
}
- return false;
}
+
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