#include "llvm/AutoUpgrade.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/CallSite.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.");
StringRef Name = F->getName();
if (Name.size() <= 8 || !Name.startswith("llvm."))
return false;
Name = Name.substr(5);
FunctionType *FTy = F->getFunctionType();
Module *M = F->getParent();
switch (Name[0]) {
default: break;
case 'p':
if (Name == "prefetch") {
if (FTy->getNumParams() == 4)
break;
assert(FTy->getNumParams() == 3 && "old prefetch takes 3 args!");
std::string NameTmp = F->getName();
F->setName("");
NewFn = cast<Function>(M->getOrInsertFunction(NameTmp,
FTy->getReturnType(),
FTy->getParamType(0),
FTy->getParamType(1),
FTy->getParamType(2),
FTy->getParamType(2),
(Type*)0));
return true;
}
break;
case 'x': {
const char *NewFnName = NULL;
if (Name == "x86.sse42.crc32.8")
NewFnName = "llvm.x86.sse42.crc32.32.8";
else if (Name == "x86.sse42.crc32.16")
NewFnName = "llvm.x86.sse42.crc32.32.16";
else if (Name == "x86.sse42.crc32.32")
NewFnName = "llvm.x86.sse42.crc32.32.32";
else if (Name == "x86.sse42.crc64.8")
NewFnName = "llvm.x86.sse42.crc32.64.8";
else if (Name == "x86.sse42.crc64.64")
NewFnName = "llvm.x86.sse42.crc32.64.64";
if (NewFnName) {
F->setName(NewFnName);
NewFn = F;
return true;
}
if (Name == "x86.sse.loadu.ps" || Name == "x86.sse2.loadu.dq" ||
Name == "x86.sse2.loadu.pd")
return true;
if (Name == "x86.sse.movnt.ps" || Name == "x86.sse2.movnt.dq" ||
Name == "x86.sse2.movnt.pd" || Name == "x86.sse2.movnt.i")
return true;
break;
}
}
return false;
}
bool llvm::UpgradeIntrinsicFunction(Function *F, Function *&NewFn) {
NewFn = 0;
bool Upgraded = UpgradeIntrinsicFunction1(F, NewFn);
if (NewFn)
F = NewFn;
if (unsigned id = F->getIntrinsicID())
F->setAttributes(Intrinsic::getAttributes((Intrinsic::ID)id));
return Upgraded;
}
bool llvm::UpgradeGlobalVariable(GlobalVariable *GV) {
return false;
}
void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
Function *F = CI->getCalledFunction();
LLVMContext &C = CI->getContext();
ImmutableCallSite CS(CI);
assert(F && "CallInst has no function associated with it.");
if (!NewFn) {
if (F->getName() == "llvm.x86.sse.loadu.ps" ||
F->getName() == "llvm.x86.sse2.loadu.dq" ||
F->getName() == "llvm.x86.sse2.loadu.pd") {
Type *VecTy = CI->getType();
Type *IntTy = IntegerType::get(C, 128);
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
Value *BC = Builder.CreateBitCast(CI->getArgOperand(0),
PointerType::getUnqual(IntTy),
"cast");
LoadInst *LI = Builder.CreateLoad(BC, CI->getName());
LI->setAlignment(1); BC = Builder.CreateBitCast(LI, VecTy, "new.cast");
if (!CI->use_empty())
CI->replaceAllUsesWith(BC);
CI->eraseFromParent();
} else if (F->getName() == "llvm.x86.sse.movnt.ps" ||
F->getName() == "llvm.x86.sse2.movnt.dq" ||
F->getName() == "llvm.x86.sse2.movnt.pd" ||
F->getName() == "llvm.x86.sse2.movnt.i") {
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
Module *M = F->getParent();
SmallVector<Value *, 1> Elts;
Elts.push_back(ConstantInt::get(Type::getInt32Ty(C), 1));
MDNode *Node = MDNode::get(C, Elts);
Value *Arg0 = CI->getArgOperand(0);
Value *Arg1 = CI->getArgOperand(1);
Value *BC = Builder.CreateBitCast(Arg0,
PointerType::getUnqual(Arg1->getType()),
"cast");
StoreInst *SI = Builder.CreateStore(Arg1, BC);
SI->setMetadata(M->getMDKindID("nontemporal"), Node);
SI->setAlignment(16);
CI->eraseFromParent();
} else {
llvm_unreachable("Unknown function for CallInst upgrade.");
}
return;
}
switch (NewFn->getIntrinsicID()) {
case Intrinsic::prefetch: {
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
llvm::Type *I32Ty = llvm::Type::getInt32Ty(CI->getContext());
Value *Operands[4] = { CI->getArgOperand(0), CI->getArgOperand(1),
CI->getArgOperand(2),
llvm::ConstantInt::get(I32Ty, 1) };
CallInst *NewCI = CallInst::Create(NewFn, Operands,
CI->getName(), CI);
NewCI->setTailCall(CI->isTailCall());
NewCI->setCallingConv(CI->getCallingConv());
if (!CI->use_empty())
CI->replaceAllUsesWith(NewCI);
CI->eraseFromParent();
break;
}
}
}
void llvm::UpgradeCallsToIntrinsic(Function* F) {
assert(F && "Illegal attempt to upgrade a non-existent intrinsic.");
Function *NewFn;
if (UpgradeIntrinsicFunction(F, NewFn)) {
if (NewFn != F) {
for (Value::use_iterator UI = F->use_begin(), UE = F->use_end();
UI != UE; ) {
if (CallInst *CI = dyn_cast<CallInst>(*UI++))
UpgradeIntrinsicCall(CI, NewFn);
}
F->eraseFromParent();
}
}
}
void llvm::CheckDebugInfoIntrinsics(Module *M) {
if (Function *FuncStart = M->getFunction("llvm.dbg.func.start")) {
while (!FuncStart->use_empty())
cast<CallInst>(FuncStart->use_back())->eraseFromParent();
FuncStart->eraseFromParent();
}
if (Function *StopPoint = M->getFunction("llvm.dbg.stoppoint")) {
while (!StopPoint->use_empty())
cast<CallInst>(StopPoint->use_back())->eraseFromParent();
StopPoint->eraseFromParent();
}
if (Function *RegionStart = M->getFunction("llvm.dbg.region.start")) {
while (!RegionStart->use_empty())
cast<CallInst>(RegionStart->use_back())->eraseFromParent();
RegionStart->eraseFromParent();
}
if (Function *RegionEnd = M->getFunction("llvm.dbg.region.end")) {
while (!RegionEnd->use_empty())
cast<CallInst>(RegionEnd->use_back())->eraseFromParent();
RegionEnd->eraseFromParent();
}
if (Function *Declare = M->getFunction("llvm.dbg.declare")) {
if (!Declare->use_empty()) {
DbgDeclareInst *DDI = cast<DbgDeclareInst>(Declare->use_back());
if (!isa<MDNode>(DDI->getArgOperand(0)) ||
!isa<MDNode>(DDI->getArgOperand(1))) {
while (!Declare->use_empty()) {
CallInst *CI = cast<CallInst>(Declare->use_back());
CI->eraseFromParent();
}
Declare->eraseFromParent();
}
}
}
}