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Change the interface to Module::getOrInsertFunction to be easier to use,to resolve PR1088, and to help PR411.

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This simplifies many clients also


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32989 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2007-01-07 08:12:01 +00:00
parent 70d130516a
commit b76efb71d4
4 changed files with 118 additions and 255 deletions
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66
lib/Transforms/Utils/LowerInvoke.cpp
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@ -60,15 +60,15 @@ static cl::opt<bool> ExpensiveEHSupport("enable-correct-eh-support",
namespace {
class VISIBILITY_HIDDEN LowerInvoke : public FunctionPass {
// Used for both models.
Function *WriteFn;
Function *AbortFn;
Constant *WriteFn;
Constant *AbortFn;
Value *AbortMessage;
unsigned AbortMessageLength;
// Used for expensive EH support.
const Type *JBLinkTy;
GlobalVariable *JBListHead;
Function *SetJmpFn, *LongJmpFn;
Constant *SetJmpFn, *LongJmpFn;
// We peek in TLI to grab the target's jmp_buf size and alignment
const TargetLowering *TLI;
@ -87,7 +87,7 @@ namespace {
}
private:
void createAbortMessage();
void createAbortMessage(Module *M);
void writeAbortMessage(Instruction *IB);
bool insertCheapEHSupport(Function &F);
void splitLiveRangesLiveAcrossInvokes(std::vector<InvokeInst*> &Invokes);
@ -148,29 +148,12 @@ bool LowerInvoke::doInitialization(Module &M) {
// We need the 'write' and 'abort' functions for both models.
AbortFn = M.getOrInsertFunction("abort", Type::VoidTy, (Type *)0);
// Unfortunately, 'write' can end up being prototyped in several different
// ways. If the user defines a three (or more) operand function named 'write'
// we will use their prototype. We _do not_ want to insert another instance
// of a write prototype, because we don't know that the funcresolve pass will
// run after us. If there is a definition of a write function, but it's not
// suitable for our uses, we just don't emit write calls. If there is no
// write prototype at all, we just add one.
if (Function *WF = M.getNamedFunction("write")) {
if (WF->getFunctionType()->getNumParams() > 3 ||
WF->getFunctionType()->isVarArg())
WriteFn = WF;
else
WriteFn = 0;
} else {
WriteFn = M.getOrInsertFunction("write", Type::VoidTy, Type::Int32Ty,
VoidPtrTy, Type::Int32Ty, (Type *)0);
}
WriteFn = M.getOrInsertFunction("write", Type::VoidTy, Type::Int32Ty,
VoidPtrTy, Type::Int32Ty, (Type *)0);
return true;
}
void LowerInvoke::createAbortMessage() {
Module &M = *WriteFn->getParent();
void LowerInvoke::createAbortMessage(Module *M) {
if (ExpensiveEHSupport) {
// The abort message for expensive EH support tells the user that the
// program 'unwound' without an 'invoke' instruction.
@ -180,7 +163,7 @@ void LowerInvoke::createAbortMessage() {
GlobalVariable *MsgGV = new GlobalVariable(Msg->getType(), true,
GlobalValue::InternalLinkage,
Msg, "abortmsg", &M);
Msg, "abortmsg", M);
std::vector<Constant*> GEPIdx(2, Constant::getNullValue(Type::Int32Ty));
AbortMessage = ConstantExpr::getGetElementPtr(MsgGV, GEPIdx);
} else {
@ -193,7 +176,7 @@ void LowerInvoke::createAbortMessage() {
GlobalVariable *MsgGV = new GlobalVariable(Msg->getType(), true,
GlobalValue::InternalLinkage,
Msg, "abortmsg", &M);
Msg, "abortmsg", M);
std::vector<Constant*> GEPIdx(2, Constant::getNullValue(Type::Int32Ty));
AbortMessage = ConstantExpr::getGetElementPtr(MsgGV, GEPIdx);
}
@ -201,30 +184,15 @@ void LowerInvoke::createAbortMessage() {
void LowerInvoke::writeAbortMessage(Instruction *IB) {
if (WriteFn) {
if (AbortMessage == 0) createAbortMessage();
if (AbortMessage == 0)
createAbortMessage(IB->getParent()->getParent()->getParent());
// These are the arguments we WANT...
std::vector<Value*> Args;
Args.push_back(ConstantInt::get(Type::Int32Ty, 2));
Args.push_back(AbortMessage);
Args.push_back(ConstantInt::get(Type::Int32Ty, AbortMessageLength));
// If the actual declaration of write disagrees, insert casts as
// appropriate.
const FunctionType *FT = WriteFn->getFunctionType();
unsigned NumArgs = FT->getNumParams();
for (unsigned i = 0; i != 3; ++i)
if (i < NumArgs && FT->getParamType(i) != Args[i]->getType())
if (Args[i]->getType()->isInteger())
Args[i] = ConstantExpr::getIntegerCast(cast<Constant>(Args[i]),
FT->getParamType(i), true);
else
Args[i] = ConstantExpr::getBitCast(cast<Constant>(Args[i]),
FT->getParamType(i));
(new CallInst(WriteFn, Args, "", IB))->setTailCall();
}
// These are the arguments we WANT...
std::vector<Value*> Args;
Args.push_back(ConstantInt::get(Type::Int32Ty, 2));
Args.push_back(AbortMessage);
Args.push_back(ConstantInt::get(Type::Int32Ty, AbortMessageLength));
(new CallInst(WriteFn, Args, "", IB))->setTailCall();
}
bool LowerInvoke::insertCheapEHSupport(Function &F) {