#include "llvm/LLVMContext.h"
#include "llvm/Module.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 <cstring>
using namespace llvm;
+// Upgrade the declarations of the SSE4.1 functions whose arguments have
+// changed their type from v4f32 to v2i64.
+static bool UpgradeSSE41Function(Function* F, Intrinsic::ID IID,
+ Function *&NewFn) {
+ // Check whether this is an old version of the function, which received
+ // v4f32 arguments.
+ Type *Arg0Type = F->getFunctionType()->getParamType(0);
+ if (Arg0Type != VectorType::get(Type::getFloatTy(F->getContext()), 4))
+ return false;
+
+ // Yes, it's old, replace it with new version.
+ F->setName(F->getName() + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(), IID);
+ return true;
+}
static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
assert(F && "Illegal to upgrade a non-existent Function.");
return false;
Name = Name.substr(5); // Strip off "llvm."
- FunctionType *FTy = F->getFunctionType();
- Module *M = F->getParent();
-
switch (Name[0]) {
default: break;
- case 'p':
- // This upgrades the llvm.prefetch intrinsic to accept one more parameter,
- // which is a instruction / data cache identifier. The old version only
- // implicitly accepted the data version.
- if (Name == "prefetch") {
- // Don't do anything if it has the correct number of arguments already
- if (FTy->getNumParams() == 4)
- break;
-
- assert(FTy->getNumParams() == 3 && "old prefetch takes 3 args!");
- // 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.
- 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));
+ 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;
+ }
+ 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;
+ }
case 'x': {
- const char *NewFnName = NULL;
- // This fixes the poorly named crc32 intrinsics.
- 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;
+ if (Name.startswith("x86.sse2.pcmpeq.") ||
+ Name.startswith("x86.sse2.pcmpgt.") ||
+ Name.startswith("x86.avx2.pcmpeq.") ||
+ Name.startswith("x86.avx2.pcmpgt.") ||
+ Name.startswith("x86.avx.vpermil.") ||
+ Name == "x86.avx.movnt.dq.256" ||
+ Name == "x86.avx.movnt.pd.256" ||
+ Name == "x86.avx.movnt.ps.256" ||
+ (Name.startswith("x86.xop.vpcom") && F->arg_size() == 2)) {
+ NewFn = 0;
return true;
}
-
- // Calls to these instructions are transformed into unaligned loads.
- if (Name == "x86.sse.loadu.ps" || Name == "x86.sse2.loadu.dq" ||
- Name == "x86.sse2.loadu.pd")
+ // SSE4.1 ptest functions may have an old signature.
+ if (Name.startswith("x86.sse41.ptest")) {
+ if (Name == "x86.sse41.ptestc")
+ return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestc, NewFn);
+ if (Name == "x86.sse41.ptestz")
+ return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestz, NewFn);
+ if (Name == "x86.sse41.ptestnzc")
+ return UpgradeSSE41Function(F, Intrinsic::x86_sse41_ptestnzc, NewFn);
+ }
+ // frcz.ss/sd may need to have an argument dropped
+ if (Name.startswith("x86.xop.vfrcz.ss") && F->arg_size() == 2) {
+ F->setName(Name + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(),
+ Intrinsic::x86_xop_vfrcz_ss);
return true;
-
- // Calls to these instructions are transformed into nontemporal stores.
- if (Name == "x86.sse.movnt.ps" || Name == "x86.sse2.movnt.dq" ||
- Name == "x86.sse2.movnt.pd" || Name == "x86.sse2.movnt.i")
+ }
+ if (Name.startswith("x86.xop.vfrcz.sd") && F->arg_size() == 2) {
+ F->setName(Name + ".old");
+ NewFn = Intrinsic::getDeclaration(F->getParent(),
+ Intrinsic::x86_xop_vfrcz_sd);
return true;
-
+ }
+ // Fix the FMA4 intrinsics to remove the 4
+ if (Name.startswith("x86.fma4.")) {
+ F->setName("llvm.x86.fma" + Name.substr(8));
+ NewFn = F;
+ 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
- // upgraded form of the intrinsic. We should perhaps have two separate
+ // 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 false;
}
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
+// 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 &C = CI->getContext();
- ImmutableCallSite CS(CI);
+ IRBuilder<> Builder(C);
+ Builder.SetInsertPoint(CI->getParent(), CI);
- assert(F && "CallInst has no function associated with it.");
+ assert(F && "Intrinsic call is not direct?");
if (!NewFn) {
- if (F->getName() == "llvm.x86.sse.loadu.ps" ||
- F->getName() == "llvm.x86.sse2.loadu.dq" ||
- F->getName() == "llvm.x86.sse2.loadu.pd") {
- // Convert to a native, unaligned load.
- 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); // Unaligned load.
- BC = Builder.CreateBitCast(LI, VecTy, "new.cast");
-
- // Fix up all the uses with our new load.
- if (!CI->use_empty())
- CI->replaceAllUsesWith(BC);
-
- // Remove intrinsic.
- 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") {
+ // Get the Function's name.
+ StringRef Name = F->getName();
+
+ Value *Rep;
+ // Upgrade packed integer vector compares intrinsics to compare instructions
+ if (Name.startswith("llvm.x86.sse2.pcmpeq.") ||
+ Name.startswith("llvm.x86.avx2.pcmpeq.")) {
+ Rep = Builder.CreateICmpEQ(CI->getArgOperand(0), CI->getArgOperand(1),
+ "pcmpeq");
+ // need to sign extend since icmp returns vector of i1
+ Rep = Builder.CreateSExt(Rep, CI->getType(), "");
+ } else if (Name.startswith("llvm.x86.sse2.pcmpgt.") ||
+ Name.startswith("llvm.x86.avx2.pcmpgt.")) {
+ Rep = Builder.CreateICmpSGT(CI->getArgOperand(0), CI->getArgOperand(1),
+ "pcmpgt");
+ // need to sign extend since icmp returns vector of i1
+ Rep = Builder.CreateSExt(Rep, CI->getType(), "");
+ } else if (Name == "llvm.x86.avx.movnt.dq.256" ||
+ Name == "llvm.x86.avx.movnt.ps.256" ||
+ Name == "llvm.x86.avx.movnt.pd.256") {
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
// Remove intrinsic.
CI->eraseFromParent();
+ return;
+ } else if (Name.startswith("llvm.x86.xop.vpcom")) {
+ Intrinsic::ID intID;
+ if (Name.endswith("ub"))
+ intID = Intrinsic::x86_xop_vpcomub;
+ else if (Name.endswith("uw"))
+ intID = Intrinsic::x86_xop_vpcomuw;
+ else if (Name.endswith("ud"))
+ intID = Intrinsic::x86_xop_vpcomud;
+ else if (Name.endswith("uq"))
+ intID = Intrinsic::x86_xop_vpcomuq;
+ else if (Name.endswith("b"))
+ intID = Intrinsic::x86_xop_vpcomb;
+ else if (Name.endswith("w"))
+ intID = Intrinsic::x86_xop_vpcomw;
+ else if (Name.endswith("d"))
+ intID = Intrinsic::x86_xop_vpcomd;
+ else if (Name.endswith("q"))
+ intID = Intrinsic::x86_xop_vpcomq;
+ else
+ llvm_unreachable("Unknown suffix");
+
+ Name = Name.substr(18); // strip off "llvm.x86.xop.vpcom"
+ unsigned Imm;
+ if (Name.startswith("lt"))
+ Imm = 0;
+ else if (Name.startswith("le"))
+ Imm = 1;
+ else if (Name.startswith("gt"))
+ Imm = 2;
+ else if (Name.startswith("ge"))
+ Imm = 3;
+ else if (Name.startswith("eq"))
+ Imm = 4;
+ else if (Name.startswith("ne"))
+ Imm = 5;
+ else if (Name.startswith("true"))
+ Imm = 6;
+ else if (Name.startswith("false"))
+ Imm = 7;
+ else
+ llvm_unreachable("Unknown condition");
+
+ Function *VPCOM = Intrinsic::getDeclaration(F->getParent(), intID);
+ Rep = Builder.CreateCall3(VPCOM, CI->getArgOperand(0),
+ CI->getArgOperand(1), Builder.getInt8(Imm));
} else {
- llvm_unreachable("Unknown function for CallInst upgrade.");
+ bool PD128 = false, PD256 = false, PS128 = false, PS256 = false;
+ if (Name == "llvm.x86.avx.vpermil.pd.256")
+ PD256 = true;
+ else if (Name == "llvm.x86.avx.vpermil.pd")
+ PD128 = true;
+ else if (Name == "llvm.x86.avx.vpermil.ps.256")
+ PS256 = true;
+ else if (Name == "llvm.x86.avx.vpermil.ps")
+ PS128 = true;
+
+ if (PD256 || PD128 || PS256 || PS128) {
+ Value *Op0 = CI->getArgOperand(0);
+ unsigned Imm = cast<ConstantInt>(CI->getArgOperand(1))->getZExtValue();
+ SmallVector<Constant*, 8> Idxs;
+
+ if (PD128)
+ for (unsigned i = 0; i != 2; ++i)
+ Idxs.push_back(Builder.getInt32((Imm >> i) & 0x1));
+ else if (PD256)
+ for (unsigned l = 0; l != 4; l+=2)
+ for (unsigned i = 0; i != 2; ++i)
+ Idxs.push_back(Builder.getInt32(((Imm >> (l+i)) & 0x1) + l));
+ else if (PS128)
+ for (unsigned i = 0; i != 4; ++i)
+ Idxs.push_back(Builder.getInt32((Imm >> (2 * i)) & 0x3));
+ else if (PS256)
+ for (unsigned l = 0; l != 8; l+=4)
+ for (unsigned i = 0; i != 4; ++i)
+ Idxs.push_back(Builder.getInt32(((Imm >> (2 * i)) & 0x3) + l));
+ else
+ llvm_unreachable("Unexpected function");
+
+ Rep = Builder.CreateShuffleVector(Op0, Op0, ConstantVector::get(Idxs));
+ } else {
+ llvm_unreachable("Unknown function for CallInst upgrade.");
+ }
}
+
+ CI->replaceAllUsesWith(Rep);
+ CI->eraseFromParent();
return;
}
+ StringRef Name = CI->getName();
+
switch (NewFn->getIntrinsicID()) {
- case Intrinsic::prefetch: {
- IRBuilder<> Builder(C);
- Builder.SetInsertPoint(CI->getParent(), CI);
- llvm::Type *I32Ty = llvm::Type::getInt32Ty(CI->getContext());
-
- // Add the extra "data cache" argument
- 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());
- // 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.
+ default:
+ llvm_unreachable("Unknown function for CallInst upgrade.");
+
+ case Intrinsic::ctlz:
+ case Intrinsic::cttz:
+ assert(CI->getNumArgOperands() == 1 &&
+ "Mismatch between function args and call args");
+ CI->setName(Name + ".old");
+ CI->replaceAllUsesWith(Builder.CreateCall2(NewFn, CI->getArgOperand(0),
+ Builder.getFalse(), Name));
CI->eraseFromParent();
- break;
+ return;
+
+ case Intrinsic::x86_xop_vfrcz_ss:
+ case Intrinsic::x86_xop_vfrcz_sd:
+ CI->replaceAllUsesWith(Builder.CreateCall(NewFn, CI->getArgOperand(1),
+ Name));
+ CI->eraseFromParent();
+ return;
+
+ case Intrinsic::x86_sse41_ptestc:
+ case Intrinsic::x86_sse41_ptestz:
+ case Intrinsic::x86_sse41_ptestnzc: {
+ // The arguments for these intrinsics used to be v4f32, and changed
+ // to v2i64. This is purely a nop, since those are bitwise intrinsics.
+ // So, the only thing required is a bitcast for both arguments.
+ // First, check the arguments have the old type.
+ Value *Arg0 = CI->getArgOperand(0);
+ if (Arg0->getType() != VectorType::get(Type::getFloatTy(C), 4))
+ return;
+
+ // Old intrinsic, add bitcasts
+ Value *Arg1 = CI->getArgOperand(1);
+
+ Value *BC0 =
+ Builder.CreateBitCast(Arg0,
+ VectorType::get(Type::getInt64Ty(C), 2),
+ "cast");
+ Value *BC1 =
+ Builder.CreateBitCast(Arg1,
+ VectorType::get(Type::getInt64Ty(C), 2),
+ "cast");
+
+ CallInst* NewCall = Builder.CreateCall2(NewFn, BC0, BC1, Name);
+ CI->replaceAllUsesWith(NewCall);
+ CI->eraseFromParent();
+ return;
}
}
}
}
}
-/// This function strips all debug info intrinsics, except for llvm.dbg.declare.
-/// If an llvm.dbg.declare intrinsic is invalid, then this function simply
-/// strips that use.
-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();
- }
- }
- }
-}
-
-/// FindExnAndSelIntrinsics - Find the eh_exception and eh_selector intrinsic
-/// calls reachable from the unwind basic block.
-static void FindExnAndSelIntrinsics(BasicBlock *BB, CallInst *&Exn,
- CallInst *&Sel,
- SmallPtrSet<BasicBlock*, 8> &Visited) {
- if (!Visited.insert(BB)) return;
-
- for (BasicBlock::iterator
- I = BB->begin(), E = BB->end(); I != E; ++I) {
- if (CallInst *CI = dyn_cast<CallInst>(I)) {
- switch (CI->getCalledFunction()->getIntrinsicID()) {
- default: break;
- case Intrinsic::eh_exception:
- assert(!Exn && "Found more than one eh.exception call!");
- Exn = CI;
- break;
- case Intrinsic::eh_selector:
- assert(!Sel && "Found more than one eh.selector call!");
- Sel = CI;
- break;
- }
-
- if (Exn && Sel) return;
- }
- }
-
- if (Exn && Sel) return;
-
- for (succ_iterator I = succ_begin(BB), E = succ_end(BB); I != E; ++I) {
- FindExnAndSelIntrinsics(*I, Exn, Sel, Visited);
- if (Exn && Sel) return;
- }
-}
-
-/// TransferClausesToLandingPadInst - Transfer the exception handling clauses
-/// from the eh_selector call to the new landingpad instruction.
-static void TransferClausesToLandingPadInst(LandingPadInst *LPI,
- CallInst *EHSel) {
- LLVMContext &Context = LPI->getContext();
- unsigned N = EHSel->getNumArgOperands();
-
- for (unsigned i = N - 1; i > 1; --i) {
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(EHSel->getArgOperand(i))){
- unsigned FilterLength = CI->getZExtValue();
- unsigned FirstCatch = i + FilterLength + !FilterLength;
- assert(FirstCatch <= N && "Invalid filter length");
-
- if (FirstCatch < N)
- for (unsigned j = FirstCatch; j < N; ++j) {
- Value *Val = EHSel->getArgOperand(j);
- if (!Val->hasName() || Val->getName() != "llvm.eh.catch.all.value") {
- LPI->addClause(EHSel->getArgOperand(j));
- } else {
- GlobalVariable *GV = cast<GlobalVariable>(Val);
- LPI->addClause(GV->getInitializer());
- }
- }
-
- if (!FilterLength) {
- // Cleanup.
- LPI->setCleanup(true);
- } else {
- // Filter.
- SmallVector<Constant *, 4> TyInfo;
- TyInfo.reserve(FilterLength - 1);
- for (unsigned j = i + 1; j < FirstCatch; ++j)
- TyInfo.push_back(cast<Constant>(EHSel->getArgOperand(j)));
- ArrayType *AType =
- ArrayType::get(!TyInfo.empty() ? TyInfo[0]->getType() :
- PointerType::getUnqual(Type::getInt8Ty(Context)),
- TyInfo.size());
- LPI->addClause(ConstantArray::get(AType, TyInfo));
- }
-
- N = i;
- }
- }
-
- if (N > 2)
- for (unsigned j = 2; j < N; ++j) {
- Value *Val = EHSel->getArgOperand(j);
- if (!Val->hasName() || Val->getName() != "llvm.eh.catch.all.value") {
- LPI->addClause(EHSel->getArgOperand(j));
- } else {
- GlobalVariable *GV = cast<GlobalVariable>(Val);
- LPI->addClause(GV->getInitializer());
- }
- }
-}
-
-/// This function upgrades the old pre-3.0 exception handling system to the new
-/// one. N.B. This will be removed in 3.1.
-void llvm::UpgradeExceptionHandling(Module *M) {
- Function *EHException = M->getFunction("llvm.eh.exception");
- Function *EHSelector = M->getFunction("llvm.eh.selector");
- if (!EHException || !EHSelector)
- return;
-
- LLVMContext &Context = M->getContext();
- Type *ExnTy = PointerType::getUnqual(Type::getInt8Ty(Context));
- Type *SelTy = Type::getInt32Ty(Context);
- Type *LPadSlotTy = StructType::get(ExnTy, SelTy, NULL);
-
- // This map links the invoke instruction with the eh.exception and eh.selector
- // calls associated with it.
- DenseMap<InvokeInst*, std::pair<Value*, Value*> > InvokeToIntrinsicsMap;
- for (Module::iterator
- I = M->begin(), E = M->end(); I != E; ++I) {
- Function &F = *I;
-
- for (Function::iterator
- II = F.begin(), IE = F.end(); II != IE; ++II) {
- BasicBlock *BB = &*II;
- InvokeInst *Inst = dyn_cast<InvokeInst>(BB->getTerminator());
- if (!Inst) continue;
- BasicBlock *UnwindDest = Inst->getUnwindDest();
- if (UnwindDest->isLandingPad()) continue; // Already converted.
-
- SmallPtrSet<BasicBlock*, 8> Visited;
- CallInst *Exn = 0;
- CallInst *Sel = 0;
- FindExnAndSelIntrinsics(UnwindDest, Exn, Sel, Visited);
- assert(Exn && Sel && "Cannot find eh.exception and eh.selector calls!");
- InvokeToIntrinsicsMap[Inst] = std::make_pair(Exn, Sel);
- }
- }
-
- // This map stores the slots where the exception object and selector value are
- // stored within a function.
- DenseMap<Function*, std::pair<Value*, Value*> > FnToLPadSlotMap;
-
- // This maps the old intrinsic calls (eh.exception & eh.selector) to the new
- // landingpad instruction(s).
- DenseMap<std::pair<CallInst*, CallInst*>,
- SmallVector<std::pair<Value*, Value*>, 8> > OldExnToNewExnMap;
-
- SmallPtrSet<Instruction*, 32> DeadInsts;
- for (DenseMap<InvokeInst*, std::pair<Value*, Value*> >::iterator
- I = InvokeToIntrinsicsMap.begin(), E = InvokeToIntrinsicsMap.end();
- I != E; ++I) {
- InvokeInst *Invoke = I->first;
- BasicBlock *UnwindDest = Invoke->getUnwindDest();
- Function *F = UnwindDest->getParent();
- std::pair<Value*, Value*> EHIntrinsics = I->second;
- CallInst *Exn = cast<CallInst>(EHIntrinsics.first);
- CallInst *Sel = cast<CallInst>(EHIntrinsics.second);
-
- // Store the exception object and selector value in the entry block.
- Value *ExnSlot = 0;
- Value *SelSlot = 0;
- if (!FnToLPadSlotMap[F].first) {
- BasicBlock *Entry = &F->front();
- ExnSlot = new AllocaInst(ExnTy, "exn", Entry->getTerminator());
- SelSlot = new AllocaInst(SelTy, "sel", Entry->getTerminator());
- FnToLPadSlotMap[F] = std::make_pair(ExnSlot, SelSlot);
- } else {
- ExnSlot = FnToLPadSlotMap[F].first;
- SelSlot = FnToLPadSlotMap[F].second;
- }
-
- if (!UnwindDest->getSinglePredecessor()) {
- // The unwind destination doesn't have a single predecessor. Create an
- // unwind destination which has only one predecessor.
- BasicBlock *NewBB = BasicBlock::Create(Context, "new.lpad",
- UnwindDest->getParent());
- BranchInst::Create(UnwindDest, NewBB);
- Invoke->setUnwindDest(NewBB);
-
- // Fix up any PHIs in the original unwind destination block.
- for (BasicBlock::iterator
- II = UnwindDest->begin(); isa<PHINode>(II); ++II) {
- PHINode *PN = cast<PHINode>(II);
- int Idx = PN->getBasicBlockIndex(Invoke->getParent());
- if (Idx == -1) continue;
- PN->setIncomingBlock(Idx, NewBB);
- }
-
- UnwindDest = NewBB;
- }
-
- IRBuilder<> Builder(Context);
- Builder.SetInsertPoint(UnwindDest, UnwindDest->getFirstInsertionPt());
-
- Value *PersFn = Sel->getArgOperand(1);
- LandingPadInst *LPI = Builder.CreateLandingPad(LPadSlotTy, PersFn, 0);
- Value *LPExn = Builder.CreateExtractValue(LPI, 0);
- Value *LPSel = Builder.CreateExtractValue(LPI, 1);
- Builder.CreateStore(LPExn, ExnSlot);
- Builder.CreateStore(LPSel, SelSlot);
-
- TransferClausesToLandingPadInst(LPI, Sel);
-
- OldExnToNewExnMap[std::make_pair(Exn, Sel)].
- push_back(std::make_pair(LPExn, LPSel));
-
- DeadInsts.insert(Exn);
- DeadInsts.insert(Sel);
- }
-
- // Replace the old intrinsic calls with the new (possibly PHI'ed) values.
- for (DenseMap<std::pair<CallInst*, CallInst*>,
- SmallVector<std::pair<Value*, Value*>, 8> >::iterator
- I = OldExnToNewExnMap.begin(), E = OldExnToNewExnMap.end();
- I != E; ++I) {
- std::pair<CallInst*, CallInst*> OldExnSel = I->first;
- CallInst *Exn = OldExnSel.first;
- CallInst *Sel = OldExnSel.second;
- SmallVector<std::pair<Value*, Value*>, 8> &LPExnSel = I->second;
- unsigned Size = LPExnSel.size();
- Value *LPExn = LPExnSel[0].first;
- Value *LPSel = LPExnSel[0].second;
-
- if (Size != 1) {
- BasicBlock *Parent = Exn->getParent();
- IRBuilder<> Builder(Context);
- Builder.SetInsertPoint(Parent, Parent->getFirstInsertionPt());
-
- PHINode *PN = Builder.CreatePHI(Exn->getType(), Size, "exn.phi");
- for (SmallVector<std::pair<Value*, Value*>, 8>::iterator
- II = LPExnSel.begin(), IE = LPExnSel.end(); II != IE; ++II)
- PN->addIncoming(II->first, cast<Instruction>(II->first)->getParent());
-
- LPExn = PN;
-
- Parent = Sel->getParent();
- Builder.SetInsertPoint(Parent, Parent->getFirstInsertionPt());
-
- PN = Builder.CreatePHI(Sel->getType(), Size, "sel.phi");
- for (SmallVector<std::pair<Value*, Value*>, 8>::iterator
- II = LPExnSel.begin(), IE = LPExnSel.end(); II != IE; ++II)
- PN->addIncoming(II->second, cast<Instruction>(II->second)->getParent());
-
- LPSel = PN;
- }
-
- Exn->replaceAllUsesWith(LPExn);
- Sel->replaceAllUsesWith(LPSel);
- }
-
- // Remove the dead instructions.
- for (SmallPtrSet<Instruction*, 32>::iterator
- I = DeadInsts.begin(), E = DeadInsts.end(); I != E; ++I) {
- Instruction *Inst = *I;
- Inst->eraseFromParent();
- }
-
- // Replace calls to "llvm.eh.resume" with the 'resume' instruction. Load the
- // exception and selector values from the stored place.
- Function *EHResume = M->getFunction("llvm.eh.resume");
- if (!EHResume) return;
-
- while (!EHResume->use_empty()) {
- CallInst *Resume = cast<CallInst>(EHResume->use_back());
- BasicBlock *BB = Resume->getParent();
- Function *Fn = BB->getParent();
- std::pair<Value*, Value*> &ExnSel = FnToLPadSlotMap[Fn];
- IRBuilder<> Builder(Context);
- Builder.SetInsertPoint(BB, Resume);
-
- Value *Exn = Builder.CreateLoad(ExnSel.first, "exn");
- Value *Sel = Builder.CreateLoad(ExnSel.second, "sel");
-
- Value *LPadVal =
- Builder.CreateInsertValue(UndefValue::get(LPadSlotTy),
- Exn, 0, "lpad.val");
- LPadVal = Builder.CreateInsertValue(LPadVal, Sel, 1, "lpad.val");
- Builder.CreateResume(LPadVal);
-
- // Remove all instructions after the 'resume.'
- BasicBlock::iterator I = Resume;
- while (I != BB->end()) {
- Instruction *Inst = &*I++;
- Inst->eraseFromParent();
- }
- }
-}
projects / oota-llvm.git / blobdiff