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-rw-r--r--lib/Transforms/Utils/LowerInvoke.cpp56
1 files changed, 31 insertions, 25 deletions
diff --git a/lib/Transforms/Utils/LowerInvoke.cpp b/lib/Transforms/Utils/LowerInvoke.cpp
index 1417f10e64..9f20f3954d 100644
--- a/lib/Transforms/Utils/LowerInvoke.cpp
+++ b/lib/Transforms/Utils/LowerInvoke.cpp
@@ -115,35 +115,35 @@ FunctionPass *llvm::createLowerInvokePass(const TargetLowering *TLI) {
// doInitialization - Make sure that there is a prototype for abort in the
// current module.
bool LowerInvoke::doInitialization(Module &M) {
- Context = &M.getContext();
+ LLVMContext &Context = M.getContext();
- const Type *VoidPtrTy = Context->getPointerTypeUnqual(Type::Int8Ty);
+ const Type *VoidPtrTy = Context.getPointerTypeUnqual(Type::Int8Ty);
AbortMessage = 0;
if (ExpensiveEHSupport) {
// Insert a type for the linked list of jump buffers.
unsigned JBSize = TLI ? TLI->getJumpBufSize() : 0;
JBSize = JBSize ? JBSize : 200;
- const Type *JmpBufTy = Context->getArrayType(VoidPtrTy, JBSize);
+ const Type *JmpBufTy = Context.getArrayType(VoidPtrTy, JBSize);
{ // The type is recursive, so use a type holder.
std::vector<const Type*> Elements;
Elements.push_back(JmpBufTy);
- OpaqueType *OT = Context->getOpaqueType();
- Elements.push_back(Context->getPointerTypeUnqual(OT));
- PATypeHolder JBLType(Context->getStructType(Elements));
+ OpaqueType *OT = Context.getOpaqueType();
+ Elements.push_back(Context.getPointerTypeUnqual(OT));
+ PATypeHolder JBLType(Context.getStructType(Elements));
OT->refineAbstractTypeTo(JBLType.get()); // Complete the cycle.
JBLinkTy = JBLType.get();
M.addTypeName("llvm.sjljeh.jmpbufty", JBLinkTy);
}
- const Type *PtrJBList = Context->getPointerTypeUnqual(JBLinkTy);
+ const Type *PtrJBList = Context.getPointerTypeUnqual(JBLinkTy);
// Now that we've done that, insert the jmpbuf list head global, unless it
// already exists.
if (!(JBListHead = M.getGlobalVariable("llvm.sjljeh.jblist", PtrJBList))) {
JBListHead = new GlobalVariable(M, PtrJBList, false,
GlobalValue::LinkOnceAnyLinkage,
- Context->getNullValue(PtrJBList),
+ Context.getNullValue(PtrJBList),
"llvm.sjljeh.jblist");
}
@@ -177,30 +177,32 @@ bool LowerInvoke::doInitialization(Module &M) {
}
void LowerInvoke::createAbortMessage(Module *M) {
+ LLVMContext &Context = M->getContext();
+
if (ExpensiveEHSupport) {
// The abort message for expensive EH support tells the user that the
// program 'unwound' without an 'invoke' instruction.
Constant *Msg =
- Context->getConstantArray("ERROR: Exception thrown, but not caught!\n");
+ Context.getConstantArray("ERROR: Exception thrown, but not caught!\n");
AbortMessageLength = Msg->getNumOperands()-1; // don't include \0
GlobalVariable *MsgGV = new GlobalVariable(*M, Msg->getType(), true,
GlobalValue::InternalLinkage,
Msg, "abortmsg");
- std::vector<Constant*> GEPIdx(2, Context->getNullValue(Type::Int32Ty));
- AbortMessage = Context->getConstantExprGetElementPtr(MsgGV, &GEPIdx[0], 2);
+ std::vector<Constant*> GEPIdx(2, Context.getNullValue(Type::Int32Ty));
+ AbortMessage = Context.getConstantExprGetElementPtr(MsgGV, &GEPIdx[0], 2);
} else {
// The abort message for cheap EH support tells the user that EH is not
// enabled.
Constant *Msg =
- Context->getConstantArray("Exception handler needed, but not enabled."
+ Context.getConstantArray("Exception handler needed, but not enabled."
"Recompile program with -enable-correct-eh-support.\n");
AbortMessageLength = Msg->getNumOperands()-1; // don't include \0
GlobalVariable *MsgGV = new GlobalVariable(*M, Msg->getType(), true,
GlobalValue::InternalLinkage,
Msg, "abortmsg");
- std::vector<Constant*> GEPIdx(2, Context->getNullValue(Type::Int32Ty));
+ std::vector<Constant*> GEPIdx(2, Context.getNullValue(Type::Int32Ty));
AbortMessage = ConstantExpr::getGetElementPtr(MsgGV, &GEPIdx[0], 2);
}
}
@@ -221,6 +223,7 @@ void LowerInvoke::writeAbortMessage(Instruction *IB) {
}
bool LowerInvoke::insertCheapEHSupport(Function &F) {
+ LLVMContext &Context = F.getContext();
bool Changed = false;
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
if (InvokeInst *II = dyn_cast<InvokeInst>(BB->getTerminator())) {
@@ -253,7 +256,7 @@ bool LowerInvoke::insertCheapEHSupport(Function &F) {
// Insert a return instruction. This really should be a "barrier", as it
// is unreachable.
ReturnInst::Create(F.getReturnType() == Type::VoidTy ? 0 :
- Context->getNullValue(F.getReturnType()), UI);
+ Context.getNullValue(F.getReturnType()), UI);
// Remove the unwind instruction now.
BB->getInstList().erase(UI);
@@ -268,7 +271,8 @@ bool LowerInvoke::insertCheapEHSupport(Function &F) {
void LowerInvoke::rewriteExpensiveInvoke(InvokeInst *II, unsigned InvokeNo,
AllocaInst *InvokeNum,
SwitchInst *CatchSwitch) {
- ConstantInt *InvokeNoC = Context->getConstantInt(Type::Int32Ty, InvokeNo);
+ LLVMContext &Context = II->getContext();
+ ConstantInt *InvokeNoC = Context.getConstantInt(Type::Int32Ty, InvokeNo);
// If the unwind edge has phi nodes, split the edge.
if (isa<PHINode>(II->getUnwindDest()->begin())) {
@@ -287,7 +291,7 @@ void LowerInvoke::rewriteExpensiveInvoke(InvokeInst *II, unsigned InvokeNo,
BasicBlock::iterator NI = II->getNormalDest()->getFirstNonPHI();
// nonvolatile.
- new StoreInst(Context->getNullValue(Type::Int32Ty), InvokeNum, false, NI);
+ new StoreInst(Context.getNullValue(Type::Int32Ty), InvokeNum, false, NI);
// Add a switch case to our unwind block.
CatchSwitch->addCase(InvokeNoC, II->getUnwindDest());
@@ -429,6 +433,8 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
std::vector<UnwindInst*> Unwinds;
std::vector<InvokeInst*> Invokes;
+ LLVMContext &Context = F.getContext();
+
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
if (ReturnInst *RI = dyn_cast<ReturnInst>(BB->getTerminator())) {
// Remember all return instructions in case we insert an invoke into this
@@ -476,8 +482,8 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
"jblink", F.begin()->begin());
std::vector<Value*> Idx;
- Idx.push_back(Context->getNullValue(Type::Int32Ty));
- Idx.push_back(Context->getConstantInt(Type::Int32Ty, 1));
+ Idx.push_back(Context.getNullValue(Type::Int32Ty));
+ Idx.push_back(Context.getConstantInt(Type::Int32Ty, 1));
OldJmpBufPtr = GetElementPtrInst::Create(JmpBuf, Idx.begin(), Idx.end(),
"OldBuf",
EntryBB->getTerminator());
@@ -498,7 +504,7 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
// executing. For normal calls it contains zero.
AllocaInst *InvokeNum = new AllocaInst(Type::Int32Ty, 0,
"invokenum",EntryBB->begin());
- new StoreInst(Context->getConstantInt(Type::Int32Ty, 0), InvokeNum, true,
+ new StoreInst(Context.getConstantInt(Type::Int32Ty, 0), InvokeNum, true,
EntryBB->getTerminator());
// Insert a load in the Catch block, and a switch on its value. By default,
@@ -517,7 +523,7 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
BasicBlock *ContBlock = EntryBB->splitBasicBlock(EntryBB->getTerminator(),
"setjmp.cont");
- Idx[1] = Context->getConstantInt(Type::Int32Ty, 0);
+ Idx[1] = Context.getConstantInt(Type::Int32Ty, 0);
Value *JmpBufPtr = GetElementPtrInst::Create(JmpBuf, Idx.begin(), Idx.end(),
"TheJmpBuf",
EntryBB->getTerminator());
@@ -529,7 +535,7 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
// Compare the return value to zero.
Value *IsNormal = new ICmpInst(EntryBB->getTerminator(),
ICmpInst::ICMP_EQ, SJRet,
- Context->getNullValue(SJRet->getType()),
+ Context.getNullValue(SJRet->getType()),
"notunwind");
// Nuke the uncond branch.
EntryBB->getTerminator()->eraseFromParent();
@@ -563,20 +569,20 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
// Load the JBList, if it's null, then there was no catch!
Value *NotNull = new ICmpInst(*UnwindHandler, ICmpInst::ICMP_NE, BufPtr,
- Context->getNullValue(BufPtr->getType()),
+ Context.getNullValue(BufPtr->getType()),
"notnull");
BranchInst::Create(UnwindBlock, TermBlock, NotNull, UnwindHandler);
// Create the block to do the longjmp.
// Get a pointer to the jmpbuf and longjmp.
std::vector<Value*> Idx;
- Idx.push_back(Context->getNullValue(Type::Int32Ty));
- Idx.push_back(Context->getConstantInt(Type::Int32Ty, 0));
+ Idx.push_back(Context.getNullValue(Type::Int32Ty));
+ Idx.push_back(Context.getConstantInt(Type::Int32Ty, 0));
Idx[0] = GetElementPtrInst::Create(BufPtr, Idx.begin(), Idx.end(), "JmpBuf",
UnwindBlock);
Idx[0] = new BitCastInst(Idx[0], PointerType::getUnqual(Type::Int8Ty),
"tmp", UnwindBlock);
- Idx[1] = Context->getConstantInt(Type::Int32Ty, 1);
+ Idx[1] = Context.getConstantInt(Type::Int32Ty, 1);
CallInst::Create(LongJmpFn, Idx.begin(), Idx.end(), "", UnwindBlock);
new UnreachableInst(UnwindBlock);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-13 16:03:20 +0000