#include "llvm/AutoUpgrade.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
+#include "llvm/Instruction.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
-#include "llvm/Instructions.h"
-#include "llvm/Intrinsics.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Support/CFG.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/IRBuilder.h"
#include <cstring>
using namespace llvm;
static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
assert(F && "Illegal to upgrade a non-existent Function.");
- LLVMContext* Context = F->getContext();
-
- // 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] != '.')
+ StringRef Name = F->getName();
+ if (Name.size() <= 8 || !Name.startswith("llvm."))
return false;
+ Name = Name.substr(5); // Strip off "llvm."
- Module *M = F->getParent();
- switch (Name[5]) {
+ switch (Name[0]) {
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
- // '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));
- NewFn = F;
- return true;
- }
- }
- break;
-
- 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.
- NewFn = cast<Function>(M->getOrInsertFunction(Name,
- FTy->getParamType(0),
- FTy->getParamType(0),
- (Type *)0));
+ case 'c': {
+ if (Name.startswith("ctlz.") && F->arg_size() == 1) {
+ F->setName(Name + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::ctlz,
+ F->arg_begin()->getType());
return true;
}
- break;
-
- 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));
- NewFn = F;
- return true;
- }
- break;
- }
-
- // 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));
- NewFn = F;
- return true;
- }
- break;
- }
-
- break;
- case 'x':
- // This fixes all MMX shift intrinsic instructions to take a
- // v1i64 instead of a v2i32 as the second parameter.
- 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[17] != 'i') {
-
- const llvm::Type *VT =
- Context->getVectorType(Context->getIntegerType(64), 1);
-
- // We don't have to do anything if the parameter already has
- // the correct type.
- if (FTy->getParamType(1) == VT)
- break;
-
- // 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("");
-
- assert(FTy->getNumParams() == 2 && "MMX shift intrinsics take 2 args!");
-
- // 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.
- NewFn = cast<Function>(M->getOrInsertFunction(Name,
- FTy->getReturnType(),
- FTy->getParamType(0),
- VT,
- (Type *)0));
- return true;
- } 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;
+ if (Name.startswith("cttz.") && F->arg_size() == 1) {
+ F->setName(Name + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::cttz,
+ F->arg_begin()->getType());
return true;
}
-
break;
}
+ }
// This may not belong here. This function is effectively being overloaded
// to both detect an intrinsic which needs upgrading, and to provide the
return Upgraded;
}
+bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
+ // Nothing to do yet.
+ return false;
+}
+
// 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) {
- Function *F = CI->getCalledFunction();
- LLVMContext* Context = F->getContext();
-
- assert(F && "CallInst has no function associated with it.");
-
- if (!NewFn) {
- 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;
- Value *Op0 = CI->getOperand(1);
- ShuffleVectorInst *SI = NULL;
- if (isLoadH || isLoadL) {
- Value *Op1 = Context->getUndef(Op0->getType());
- Value *Addr = new BitCastInst(CI->getOperand(2),
- Context->getPointerTypeUnqual(Type::DoubleTy),
- "upgraded.", CI);
- Value *Load = new LoadInst(Addr, "upgraded.", false, 8, CI);
- Value *Idx = Context->getConstantInt(Type::Int32Ty, 0);
- Op1 = InsertElementInst::Create(Op1, Load, Idx, "upgraded.", CI);
+ assert(CI->getCalledFunction() && "Intrinsic call is not direct?");
+ if (!NewFn) return;
- if (isLoadH) {
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 0));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
- } else {
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 1));
- }
- Value *Mask = Context->getConstantVector(Idxs);
- SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
- } else if (isMovL) {
- Constant *Zero = Context->getConstantInt(Type::Int32Ty, 0);
- Idxs.push_back(Zero);
- Idxs.push_back(Zero);
- Idxs.push_back(Zero);
- Idxs.push_back(Zero);
- Value *ZeroV = Context->getConstantVector(Idxs);
-
- Idxs.clear();
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 4));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 5));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 3));
- Value *Mask = Context->getConstantVector(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(Context->getConstantInt(Type::Int32Ty, 2));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 1));
- } else if (isUnpckhPD || isPunpckhQPD) {
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 1));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 3));
- } else {
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 0));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty, 2));
- }
- Value *Mask = Context->getConstantVector(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(Context->getConstantInt(Type::Int32Ty, MaskVal & 1));
- Idxs.push_back(Context->getConstantInt(Type::Int32Ty,
- ((MaskVal >> 1) & 1)+2));
- Value *Mask = Context->getConstantVector(Idxs);
- SI = new ShuffleVectorInst(Op0, Op1, Mask, "upgraded.", CI);
- }
-
- assert(SI && "Unexpected!");
-
- // Handle any uses of the old CallInst.
- if (!CI->use_empty())
- // Replace all uses of the old call with the new cast which has the
- // correct type.
- CI->replaceAllUsesWith(SI);
-
- // Clean up the old call now that it has been completely upgraded.
- CI->eraseFromParent();
- } else {
- LLVM_UNREACHABLE("Unknown function for CallInst upgrade.");
- }
- return;
- }
+ LLVMContext &C = CI->getContext();
+ IRBuilder<> Builder(C);
+ Builder.SetInsertPoint(CI->getParent(), CI);
switch (NewFn->getIntrinsicID()) {
- default: LLVM_UNREACHABLE("Unknown function for CallInst upgrade.");
- case Intrinsic::x86_mmx_psll_d:
- case Intrinsic::x86_mmx_psll_q:
- case Intrinsic::x86_mmx_psll_w:
- case Intrinsic::x86_mmx_psra_d:
- case Intrinsic::x86_mmx_psra_w:
- case Intrinsic::x86_mmx_psrl_d:
- case Intrinsic::x86_mmx_psrl_q:
- case Intrinsic::x86_mmx_psrl_w: {
- Value *Operands[2];
-
- 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[1] = BC;
-
- // Construct a new CallInst
- CallInst *NewCI = CallInst::Create(NewFn, Operands, Operands+2,
- "upgraded."+CI->getName(), CI);
- NewCI->setTailCall(CI->isTailCall());
- NewCI->setCallingConv(CI->getCallingConv());
-
- // Handle any uses of the old CallInst.
- if (!CI->use_empty())
- // Replace all uses of the old call with the new cast which has the
- // correct type.
- CI->replaceAllUsesWith(NewCI);
-
- // Clean up the old call now that it has been completely upgraded.
- CI->eraseFromParent();
- break;
- }
- 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 = 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->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::getCastOpcode(NewCI, SrcSExt,
- F->getReturnType(),
- DestSExt),
- NewCI, F->getReturnType(),
- NewCI->getName(), CI);
- NewCI->moveBefore(RetCast);
+ default:
+ llvm_unreachable("Unknown function for CallInst upgrade.");
- // Replace all uses of the old call with the new cast which has the
- // correct type.
- CI->replaceAllUsesWith(RetCast);
- }
-
- // Clean up the old call now that it has been completely upgraded.
+ case Intrinsic::ctlz:
+ case Intrinsic::cttz:
+ assert(CI->getNumArgOperands() == 1 &&
+ "Mismatch between function args and call args");
+ StringRef Name = CI->getName();
+ CI->setName(Name + ".old");
+ CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
+ Builder.getFalse(), Name));
CI->eraseFromParent();
- }
- break;
+ return;
}
}
assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
// Upgrade the function and check if it is a totaly new function.
- Function* NewFn;
+ Function *NewFn;
if (UpgradeIntrinsicFunction(F, NewFn)) {
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++))
+ if (CallInst *CI = dyn_cast<CallInst>(*UI++))
UpgradeIntrinsicCall(CI, NewFn);
}
// Remove old function, no longer used, from the module.
}
}
}
+
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