#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Pass.h"
+#include "llvm/Support/CallSite.h"
#include "llvm/Support/CFG.h"
-#include "llvm/Support/Compiler.h"
#include "llvm/Support/InstVisitor.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/VectorExtras.h"
-#include "llvm/ADT/SmallVector.h"
#include <map>
using namespace llvm;
namespace {
//===--------------------------------------------------------------------===//
// LowerSetJmp pass implementation.
- class VISIBILITY_HIDDEN LowerSetJmp : public ModulePass,
- public InstVisitor<LowerSetJmp> {
+ class LowerSetJmp : public ModulePass, public InstVisitor<LowerSetJmp> {
// LLVM library functions...
Constant *InitSJMap; // __llvm_sjljeh_init_setjmpmap
Constant *DestroySJMap; // __llvm_sjljeh_destroy_setjmpmap
void TransformLongJmpCall(CallInst* Inst);
void TransformSetJmpCall(CallInst* Inst);
- bool IsTransformableFunction(const std::string& Name);
+ bool IsTransformableFunction(StringRef Name);
public:
static char ID; // Pass identification, replacement for typeid
- LowerSetJmp() : ModulePass(&ID) {}
+ LowerSetJmp() : ModulePass(ID) {
+ initializeLowerSetJmpPass(*PassRegistry::getPassRegistry());
+ }
void visitCallInst(CallInst& CI);
void visitInvokeInst(InvokeInst& II);
} // end anonymous namespace
char LowerSetJmp::ID = 0;
-static RegisterPass<LowerSetJmp> X("lowersetjmp", "Lower Set Jump");
+INITIALIZE_PASS(LowerSetJmp, "lowersetjmp", "Lower Set Jump", false, false)
// run - Run the transformation on the program. We grab the function
// prototypes for longjmp and setjmp. If they are used in the program,
// This function is always successful, unless it isn't.
bool LowerSetJmp::doInitialization(Module& M)
{
- const Type *SBPTy = Context->getPointerTypeUnqual(Type::Int8Ty);
- const Type *SBPPTy = Context->getPointerTypeUnqual(SBPTy);
+ const Type *SBPTy = Type::getInt8PtrTy(M.getContext());
+ const Type *SBPPTy = PointerType::getUnqual(SBPTy);
// N.B. See llvm/runtime/GCCLibraries/libexception/SJLJ-Exception.h for
// a description of the following library functions.
// void __llvm_sjljeh_init_setjmpmap(void**)
InitSJMap = M.getOrInsertFunction("__llvm_sjljeh_init_setjmpmap",
- Type::VoidTy, SBPPTy, (Type *)0);
+ Type::getVoidTy(M.getContext()),
+ SBPPTy, (Type *)0);
// void __llvm_sjljeh_destroy_setjmpmap(void**)
DestroySJMap = M.getOrInsertFunction("__llvm_sjljeh_destroy_setjmpmap",
- Type::VoidTy, SBPPTy, (Type *)0);
+ Type::getVoidTy(M.getContext()),
+ SBPPTy, (Type *)0);
// void __llvm_sjljeh_add_setjmp_to_map(void**, void*, unsigned)
AddSJToMap = M.getOrInsertFunction("__llvm_sjljeh_add_setjmp_to_map",
- Type::VoidTy, SBPPTy, SBPTy,
- Type::Int32Ty, (Type *)0);
+ Type::getVoidTy(M.getContext()),
+ SBPPTy, SBPTy,
+ Type::getInt32Ty(M.getContext()),
+ (Type *)0);
// void __llvm_sjljeh_throw_longjmp(int*, int)
ThrowLongJmp = M.getOrInsertFunction("__llvm_sjljeh_throw_longjmp",
- Type::VoidTy, SBPTy, Type::Int32Ty,
+ Type::getVoidTy(M.getContext()), SBPTy,
+ Type::getInt32Ty(M.getContext()),
(Type *)0);
// unsigned __llvm_sjljeh_try_catching_longjmp_exception(void **)
TryCatchLJ =
M.getOrInsertFunction("__llvm_sjljeh_try_catching_longjmp_exception",
- Type::Int32Ty, SBPPTy, (Type *)0);
+ Type::getInt32Ty(M.getContext()), SBPPTy, (Type *)0);
// bool __llvm_sjljeh_is_longjmp_exception()
IsLJException = M.getOrInsertFunction("__llvm_sjljeh_is_longjmp_exception",
- Type::Int1Ty, (Type *)0);
+ Type::getInt1Ty(M.getContext()),
+ (Type *)0);
// int __llvm_sjljeh_get_longjmp_value()
GetLJValue = M.getOrInsertFunction("__llvm_sjljeh_get_longjmp_value",
- Type::Int32Ty, (Type *)0);
+ Type::getInt32Ty(M.getContext()),
+ (Type *)0);
return true;
}
// "llvm.{setjmp,longjmp}" functions and none of the setjmp/longjmp error
// handling functions (beginning with __llvm_sjljeh_...they don't throw
// exceptions).
-bool LowerSetJmp::IsTransformableFunction(const std::string& Name) {
- std::string SJLJEh("__llvm_sjljeh");
-
- if (Name.size() > SJLJEh.size())
- return std::string(Name.begin(), Name.begin() + SJLJEh.size()) != SJLJEh;
-
- return true;
+bool LowerSetJmp::IsTransformableFunction(StringRef Name) {
+ return !Name.startswith("__llvm_sjljeh_");
}
// TransformLongJmpCall - Transform a longjmp call into a call to the
// throwing the exception for us.
void LowerSetJmp::TransformLongJmpCall(CallInst* Inst)
{
- const Type* SBPTy = Context->getPointerTypeUnqual(Type::Int8Ty);
+ const Type* SBPTy = Type::getInt8PtrTy(Inst->getContext());
// Create the call to "__llvm_sjljeh_throw_longjmp". This takes the
// same parameters as "longjmp", except that the buffer is cast to a
// char*. It returns "void", so it doesn't need to replace any of
// Inst's uses and doesn't get a name.
CastInst* CI =
- new BitCastInst(Inst->getOperand(1), SBPTy, "LJBuf", Inst);
- SmallVector<Value *, 2> Args;
- Args.push_back(CI);
- Args.push_back(Inst->getOperand(2));
- CallInst::Create(ThrowLongJmp, Args.begin(), Args.end(), "", Inst);
+ new BitCastInst(Inst->getArgOperand(0), SBPTy, "LJBuf", Inst);
+ Value *Args[] = { CI, Inst->getArgOperand(1) };
+ CallInst::Create(ThrowLongJmp, Args, Args + 2, "", Inst);
SwitchValuePair& SVP = SwitchValMap[Inst->getParent()->getParent()];
if (SVP.first)
BranchInst::Create(SVP.first->getParent(), Inst);
else
- new UnwindInst(Inst);
+ new UnwindInst(Inst->getContext(), Inst);
// Remove all insts after the branch/unwind inst. Go from back to front to
// avoid replaceAllUsesWith if possible.
Removed = &BB->back();
// If the removed instructions have any users, replace them now.
if (!Removed->use_empty())
- Removed->replaceAllUsesWith(Context->getUndef(Removed->getType()));
+ Removed->replaceAllUsesWith(UndefValue::get(Removed->getType()));
Removed->eraseFromParent();
} while (Removed != Inst);
assert(Inst && "Couldn't find even ONE instruction in entry block!");
// Fill in the alloca and call to initialize the SJ map.
- const Type *SBPTy = Context->getPointerTypeUnqual(Type::Int8Ty);
+ const Type *SBPTy =
+ Type::getInt8PtrTy(Func->getContext());
AllocaInst* Map = new AllocaInst(SBPTy, 0, "SJMap", Inst);
CallInst::Create(InitSJMap, Map, "", Inst);
return SJMap[Func] = Map;
// The basic block we're going to jump to if we need to rethrow the
// exception.
- BasicBlock* Rethrow = BasicBlock::Create("RethrowExcept", Func);
+ BasicBlock* Rethrow =
+ BasicBlock::Create(Func->getContext(), "RethrowExcept", Func);
// Fill in the "Rethrow" BB with a call to rethrow the exception. This
// is the last instruction in the BB since at this point the runtime
// should exit this function and go to the next function.
- new UnwindInst(Rethrow);
+ new UnwindInst(Func->getContext(), Rethrow);
return RethrowBBMap[Func] = Rethrow;
}
{
if (SwitchValMap[Func].first) return SwitchValMap[Func];
- BasicBlock* LongJmpPre = BasicBlock::Create("LongJmpBlkPre", Func);
+ BasicBlock* LongJmpPre =
+ BasicBlock::Create(Func->getContext(), "LongJmpBlkPre", Func);
// Keep track of the preliminary basic block for some of the other
// transformations.
// The "decision basic block" gets the number associated with the
// setjmp call returning to switch on and the value returned by
// longjmp.
- BasicBlock* DecisionBB = BasicBlock::Create("LJDecisionBB", Func);
+ BasicBlock* DecisionBB =
+ BasicBlock::Create(Func->getContext(), "LJDecisionBB", Func);
BranchInst::Create(DecisionBB, Rethrow, Cond, LongJmpPre);
Function* Func = ABlock->getParent();
// Add this setjmp to the setjmp map.
- const Type* SBPTy = Context->getPointerTypeUnqual(Type::Int8Ty);
+ const Type* SBPTy =
+ Type::getInt8PtrTy(Inst->getContext());
CastInst* BufPtr =
- new BitCastInst(Inst->getOperand(1), SBPTy, "SBJmpBuf", Inst);
- std::vector<Value*> Args =
- make_vector<Value*>(GetSetJmpMap(Func), BufPtr,
- Context->getConstantInt(Type::Int32Ty,
- SetJmpIDMap[Func]++), 0);
- CallInst::Create(AddSJToMap, Args.begin(), Args.end(), "", Inst);
+ new BitCastInst(Inst->getArgOperand(0), SBPTy, "SBJmpBuf", Inst);
+ Value *Args[] = {
+ GetSetJmpMap(Func), BufPtr,
+ ConstantInt::get(Type::getInt32Ty(Inst->getContext()), SetJmpIDMap[Func]++)
+ };
+ CallInst::Create(AddSJToMap, Args, Args + 3, "", Inst);
// We are guaranteed that there are no values live across basic blocks
// (because we are "not in SSA form" yet), but there can still be values live
// Loop over all of the uses of instruction. If any of them are after the
// call, "spill" the value to the stack.
for (Value::use_iterator UI = II->use_begin(), E = II->use_end();
- UI != E; ++UI)
- if (cast<Instruction>(*UI)->getParent() != ABlock ||
- InstrsAfterCall.count(cast<Instruction>(*UI))) {
+ UI != E; ++UI) {
+ User *U = *UI;
+ if (cast<Instruction>(U)->getParent() != ABlock ||
+ InstrsAfterCall.count(cast<Instruction>(U))) {
DemoteRegToStack(*II);
break;
}
+ }
InstrsAfterCall.clear();
// Change the setjmp call into a branch statement. We'll remove the
// This PHI node will be in the new block created from the
// splitBasicBlock call.
- PHINode* PHI = PHINode::Create(Type::Int32Ty, "SetJmpReturn", Inst);
+ PHINode* PHI = PHINode::Create(Type::getInt32Ty(Inst->getContext()),
+ "SetJmpReturn", Inst);
// Coming from a call to setjmp, the return is 0.
- PHI->addIncoming(Context->getNullValue(Type::Int32Ty), ABlock);
+ PHI->addIncoming(Constant::getNullValue(Type::getInt32Ty(Inst->getContext())),
+ ABlock);
// Add the case for this setjmp's number...
SwitchValuePair SVP = GetSJSwitch(Func, GetRethrowBB(Func));
- SVP.first->addCase(Context->getConstantInt(Type::Int32Ty,
- SetJmpIDMap[Func] - 1),
- SetJmpContBlock);
+ SVP.first->addCase(ConstantInt::get(Type::getInt32Ty(Inst->getContext()),
+ SetJmpIDMap[Func] - 1),
+ SetJmpContBlock);
// Value coming from the handling of the exception.
PHI->addIncoming(SVP.second, SVP.second->getParent());
// Construct the new "invoke" instruction.
TerminatorInst* Term = OldBB->getTerminator();
- std::vector<Value*> Params(CI.op_begin() + 1, CI.op_end());
+ CallSite CS(&CI);
+ std::vector<Value*> Params(CS.arg_begin(), CS.arg_end());
InvokeInst* II =
InvokeInst::Create(CI.getCalledValue(), NewBB, PrelimBBMap[Func],
Params.begin(), Params.end(), CI.getName(), Term);
BasicBlock* ExceptBB = II.getUnwindDest();
Function* Func = BB->getParent();
- BasicBlock* NewExceptBB = BasicBlock::Create("InvokeExcept", Func);
+ BasicBlock* NewExceptBB = BasicBlock::Create(II.getContext(),
+ "InvokeExcept", Func);
// If this is a longjmp exception, then branch to the preliminary BB of
// the longjmp exception handling. Otherwise, go to the old exception.
projects / oota-llvm.git / blobdiff