6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-16 00:33:10 +00:00
Code Issues Projects Releases Wiki Activity

Remove unused code

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105293 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-06-01 21:56:30 +00:00
parent f2e7767624
commit 23d3d4595c
1 changed files with 0 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
lib/Transforms/Utils/LowerInvoke.cpp
View File

@ -63,10 +63,7 @@ static cl::opt<bool> ExpensiveEHSupport("enable-correct-eh-support",
namespace { namespace {
class LowerInvoke : public FunctionPass { class LowerInvoke : public FunctionPass {
// Used for both models. // Used for both models.
Constant *WriteFn;
Constant *AbortFn; Constant *AbortFn;
Value *AbortMessage;
unsigned AbortMessageLength;
// Used for expensive EH support. // Used for expensive EH support.
const Type *JBLinkTy; const Type *JBLinkTy;
@ -93,8 +90,6 @@ namespace {
} }
private: private:
void createAbortMessage(Module *M);
void writeAbortMessage(Instruction *IB);
bool insertCheapEHSupport(Function &F); bool insertCheapEHSupport(Function &F);
void splitLiveRangesLiveAcrossInvokes(SmallVectorImpl<InvokeInst*>&Invokes); void splitLiveRangesLiveAcrossInvokes(SmallVectorImpl<InvokeInst*>&Invokes);
void rewriteExpensiveInvoke(InvokeInst *II, unsigned InvokeNo, void rewriteExpensiveInvoke(InvokeInst *II, unsigned InvokeNo,
@ -124,7 +119,6 @@ FunctionPass *llvm::createLowerInvokePass(const TargetLowering *TLI,
bool LowerInvoke::doInitialization(Module &M) { bool LowerInvoke::doInitialization(Module &M) {
const Type *VoidPtrTy = const Type *VoidPtrTy =
Type::getInt8PtrTy(M.getContext()); Type::getInt8PtrTy(M.getContext());
AbortMessage = 0;
if (useExpensiveEHSupport) { if (useExpensiveEHSupport) {
// Insert a type for the linked list of jump buffers. // Insert a type for the linked list of jump buffers.
unsigned JBSize = TLI ? TLI->getJumpBufSize() : 0; unsigned JBSize = TLI ? TLI->getJumpBufSize() : 0;
@ -176,61 +170,9 @@ bool LowerInvoke::doInitialization(Module &M) {
// We need the 'write' and 'abort' functions for both models. // We need the 'write' and 'abort' functions for both models.
AbortFn = M.getOrInsertFunction("abort", Type::getVoidTy(M.getContext()), AbortFn = M.getOrInsertFunction("abort", Type::getVoidTy(M.getContext()),
(Type *)0); (Type *)0);
#if 0 // "write" is Unix-specific.. code is going away soon anyway.
WriteFn = M.getOrInsertFunction("write", Type::VoidTy, Type::Int32Ty,
VoidPtrTy, Type::Int32Ty, (Type *)0);
#else
WriteFn = 0;
#endif
return true; return true;
} }
void LowerInvoke::createAbortMessage(Module *M) {
Constant *Null32 = Constant::getNullValue(Type::getInt32Ty(M->getContext()));
Constant *GEPIdx[2] = { Null32, Null32 };
if (useExpensiveEHSupport) {
// The abort message for expensive EH support tells the user that the
// program 'unwound' without an 'invoke' instruction.
Constant *Msg =
ConstantArray::get(M->getContext(),
"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");
AbortMessage = ConstantExpr::getGetElementPtr(MsgGV, &GEPIdx[0], 2);
} else {
// The abort message for cheap EH support tells the user that EH is not
// enabled.
Constant *Msg =
ConstantArray::get(M->getContext(),
"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");
AbortMessage = ConstantExpr::getGetElementPtr(MsgGV, &GEPIdx[0], 2);
}
}
void LowerInvoke::writeAbortMessage(Instruction *IB) {
#if 0
if (AbortMessage == 0)
createAbortMessage(IB->getParent()->getParent()->getParent());
// These are the arguments we WANT...
Value* Args[3];
Args[0] = ConstantInt::get(Type::Int32Ty, 2);
Args[1] = AbortMessage;
Args[2] = ConstantInt::get(Type::Int32Ty, AbortMessageLength);
(new CallInst(WriteFn, Args, 3, "", IB))->setTailCall();
#endif
}
bool LowerInvoke::insertCheapEHSupport(Function &F) { bool LowerInvoke::insertCheapEHSupport(Function &F) {
bool Changed = false; bool Changed = false;
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
@ -256,9 +198,6 @@ bool LowerInvoke::insertCheapEHSupport(Function &F) {
++NumInvokes; Changed = true; ++NumInvokes; Changed = true;
} else if (UnwindInst *UI = dyn_cast<UnwindInst>(BB->getTerminator())) { } else if (UnwindInst *UI = dyn_cast<UnwindInst>(BB->getTerminator())) {
// Insert a new call to write(2, AbortMessage, AbortMessageLength);
writeAbortMessage(UI);
// Insert a call to abort() // Insert a call to abort()
CallInst::Create(AbortFn, "", UI)->setTailCall(); CallInst::Create(AbortFn, "", UI)->setTailCall();
@ -634,9 +573,6 @@ bool LowerInvoke::insertExpensiveEHSupport(Function &F) {
// Set up the term block ("throw without a catch"). // Set up the term block ("throw without a catch").
new UnreachableInst(F.getContext(), TermBlock); new UnreachableInst(F.getContext(), TermBlock);
// Insert a new call to write(2, AbortMessage, AbortMessageLength);
writeAbortMessage(TermBlock->getTerminator());
// Insert a call to abort() // Insert a call to abort()
CallInst::Create(AbortFn, "", CallInst::Create(AbortFn, "",
TermBlock->getTerminator())->setTailCall(); TermBlock->getTerminator())->setTailCall();