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Move EVER MORE stuff over to LLVMContext.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75703 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-07-14 23:09:55 +00:00
parent a89b7ea9d6
commit 9adc0abad3
53 changed files with 425 additions and 438 deletions
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lib/CodeGen/ShadowStackGC.cpp
+32 -24
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@@ -62,9 +62,11 @@ namespace {
Constant *GetFrameMap(Function &F);
const Type* GetConcreteStackEntryType(Function &F);
void CollectRoots(Function &F);
static GetElementPtrInst *CreateGEP(IRBuilder<> &B, Value *BasePtr,
static GetElementPtrInst *CreateGEP(LLVMContext *Context,
IRBuilder<> &B, Value *BasePtr,
int Idx1, const char *Name);
static GetElementPtrInst *CreateGEP(IRBuilder<> &B, Value *BasePtr,
static GetElementPtrInst *CreateGEP(LLVMContext *Context,
IRBuilder<> &B, Value *BasePtr,
int Idx1, int Idx2, const char *Name);
};
@@ -186,6 +188,7 @@ ShadowStackGC::ShadowStackGC() : Head(0), StackEntryTy(0) {
Constant *ShadowStackGC::GetFrameMap(Function &F) {
// doInitialization creates the abstract type of this value.
LLVMContext *Context = F.getContext();
Type *VoidPtr = PointerType::getUnqual(Type::Int8Ty);
@@ -200,17 +203,17 @@ Constant *ShadowStackGC::GetFrameMap(Function &F) {
}
Constant *BaseElts[] = {
ConstantInt::get(Type::Int32Ty, Roots.size(), false),
ConstantInt::get(Type::Int32Ty, NumMeta, false),
Context->getConstantInt(Type::Int32Ty, Roots.size(), false),
Context->getConstantInt(Type::Int32Ty, NumMeta, false),
};
Constant *DescriptorElts[] = {
ConstantStruct::get(BaseElts, 2),
ConstantArray::get(ArrayType::get(VoidPtr, NumMeta),
Context->getConstantStruct(BaseElts, 2),
Context->getConstantArray(Context->getArrayType(VoidPtr, NumMeta),
Metadata.begin(), NumMeta)
};
Constant *FrameMap = ConstantStruct::get(DescriptorElts, 2);
Constant *FrameMap = Context->getConstantStruct(DescriptorElts, 2);
std::string TypeName("gc_map.");
TypeName += utostr(NumMeta);
@@ -233,9 +236,9 @@ Constant *ShadowStackGC::GetFrameMap(Function &F) {
GlobalVariable::InternalLinkage,
FrameMap, "__gc_" + F.getName());
Constant *GEPIndices[2] = { ConstantInt::get(Type::Int32Ty, 0),
ConstantInt::get(Type::Int32Ty, 0) };
return ConstantExpr::getGetElementPtr(GV, GEPIndices, 2);
Constant *GEPIndices[2] = { Context->getConstantInt(Type::Int32Ty, 0),
Context->getConstantInt(Type::Int32Ty, 0) };
return Context->getConstantExprGetElementPtr(GV, GEPIndices, 2);
}
const Type* ShadowStackGC::GetConcreteStackEntryType(Function &F) {
@@ -337,11 +340,11 @@ void ShadowStackGC::CollectRoots(Function &F) {
}
GetElementPtrInst *
ShadowStackGC::CreateGEP(IRBuilder<> &B, Value *BasePtr,
ShadowStackGC::CreateGEP(LLVMContext *Context, IRBuilder<> &B, Value *BasePtr,
int Idx, int Idx2, const char *Name) {
Value *Indices[] = { ConstantInt::get(Type::Int32Ty, 0),
ConstantInt::get(Type::Int32Ty, Idx),
ConstantInt::get(Type::Int32Ty, Idx2) };
Value *Indices[] = { Context->getConstantInt(Type::Int32Ty, 0),
Context->getConstantInt(Type::Int32Ty, Idx),
Context->getConstantInt(Type::Int32Ty, Idx2) };
Value* Val = B.CreateGEP(BasePtr, Indices, Indices + 3, Name);
assert(isa<GetElementPtrInst>(Val) && "Unexpected folded constant");
@@ -350,10 +353,10 @@ ShadowStackGC::CreateGEP(IRBuilder<> &B, Value *BasePtr,
}
GetElementPtrInst *
ShadowStackGC::CreateGEP(IRBuilder<> &B, Value *BasePtr,
ShadowStackGC::CreateGEP(LLVMContext *Context, IRBuilder<> &B, Value *BasePtr,
int Idx, const char *Name) {
Value *Indices[] = { ConstantInt::get(Type::Int32Ty, 0),
ConstantInt::get(Type::Int32Ty, Idx) };
Value *Indices[] = { Context->getConstantInt(Type::Int32Ty, 0),
Context->getConstantInt(Type::Int32Ty, Idx) };
Value *Val = B.CreateGEP(BasePtr, Indices, Indices + 2, Name);
assert(isa<GetElementPtrInst>(Val) && "Unexpected folded constant");
@@ -363,6 +366,8 @@ ShadowStackGC::CreateGEP(IRBuilder<> &B, Value *BasePtr,
/// runOnFunction - Insert code to maintain the shadow stack.
bool ShadowStackGC::performCustomLowering(Function &F) {
LLVMContext *Context = F.getContext();
// Find calls to llvm.gcroot.
CollectRoots(F);
@@ -387,13 +392,14 @@ bool ShadowStackGC::performCustomLowering(Function &F) {
// Initialize the map pointer and load the current head of the shadow stack.
Instruction *CurrentHead = AtEntry.CreateLoad(Head, "gc_currhead");
Instruction *EntryMapPtr = CreateGEP(AtEntry, StackEntry,0,1,"gc_frame.map");
Instruction *EntryMapPtr = CreateGEP(Context, AtEntry, StackEntry,
0,1,"gc_frame.map");
AtEntry.CreateStore(FrameMap, EntryMapPtr);
// After all the allocas...
for (unsigned I = 0, E = Roots.size(); I != E; ++I) {
// For each root, find the corresponding slot in the aggregate...
Value *SlotPtr = CreateGEP(AtEntry, StackEntry, 1 + I, "gc_root");
Value *SlotPtr = CreateGEP(Context, AtEntry, StackEntry, 1 + I, "gc_root");
// And use it in lieu of the alloca.
AllocaInst *OriginalAlloca = Roots[I].second;
@@ -409,17 +415,19 @@ bool ShadowStackGC::performCustomLowering(Function &F) {
AtEntry.SetInsertPoint(IP->getParent(), IP);
// Push the entry onto the shadow stack.
Instruction *EntryNextPtr = CreateGEP(AtEntry,StackEntry,0,0,"gc_frame.next");
Instruction *NewHeadVal = CreateGEP(AtEntry,StackEntry, 0, "gc_newhead");
AtEntry.CreateStore(CurrentHead, EntryNextPtr);
AtEntry.CreateStore(NewHeadVal, Head);
Instruction *EntryNextPtr = CreateGEP(Context, AtEntry,
StackEntry,0,0,"gc_frame.next");
Instruction *NewHeadVal = CreateGEP(Context, AtEntry,
StackEntry, 0, "gc_newhead");
AtEntry.CreateStore(CurrentHead, EntryNextPtr);
AtEntry.CreateStore(NewHeadVal, Head);
// For each instruction that escapes...
EscapeEnumerator EE(F, "gc_cleanup");
while (IRBuilder<> *AtExit = EE.Next()) {
// Pop the entry from the shadow stack. Don't reuse CurrentHead from
// AtEntry, since that would make the value live for the entire function.
Instruction *EntryNextPtr2 = CreateGEP(*AtExit, StackEntry, 0, 0,
Instruction *EntryNextPtr2 = CreateGEP(Context, *AtExit, StackEntry, 0, 0,
"gc_frame.next");
Value *SavedHead = AtExit->CreateLoad(EntryNextPtr2, "gc_savedhead");
AtExit->CreateStore(SavedHead, Head);