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Revamp the "ConstantStruct::get" methods. Previously, these were scattered

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all over the place in different styles and variants.  Standardize on two
preferred entrypoints: one that takes a StructType and ArrayRef, and one that
takes StructType and varargs.

In cases where there isn't a struct type convenient, we now add a
ConstantStruct::getAnon method (whose name will make more sense after a few
more patches land).  

It would be "really really nice" if the ConstantStruct::get and 
ConstantVector::get methods didn't make temporary std::vectors.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133412 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-06-20 04:01:31 +00:00
parent 5d6fa7f2ac
commit b065b06c12
13 changed files with 145 additions and 114 deletions
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16
lib/CodeGen/ShadowStackGC.cpp
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@ -194,7 +194,7 @@ Constant *ShadowStackGC::GetFrameMap(Function &F) {
// Truncate the ShadowStackDescriptor if some metadata is null.
unsigned NumMeta = 0;
SmallVector<Constant*,16> Metadata;
SmallVector<Constant*, 16> Metadata;
for (unsigned I = 0; I != Roots.size(); ++I) {
Constant *C = cast<Constant>(Roots[I].first->getArgOperand(1));
if (!C->isNullValue())
@ -202,19 +202,23 @@ Constant *ShadowStackGC::GetFrameMap(Function &F) {
Metadata.push_back(ConstantExpr::getBitCast(C, VoidPtr));
}
const Type *Int32Ty = Type::getInt32Ty(F.getContext());
Constant *BaseElts[] = {
ConstantInt::get(Type::getInt32Ty(F.getContext()), Roots.size(), false),
ConstantInt::get(Type::getInt32Ty(F.getContext()), NumMeta, false),
ConstantInt::get(Int32Ty, Roots.size(), false),
ConstantInt::get(Int32Ty, NumMeta, false),
};
Constant *DescriptorElts[] = {
ConstantStruct::get(F.getContext(), BaseElts, 2, false),
ConstantStruct::get(StructType::get(Int32Ty, Int32Ty, NULL), BaseElts),
ConstantArray::get(ArrayType::get(VoidPtr, NumMeta),
Metadata.begin(), NumMeta)
};
Constant *FrameMap = ConstantStruct::get(F.getContext(), DescriptorElts, 2,
false);
Constant *FrameMap =
ConstantStruct::get(StructType::get(DescriptorElts[0]->getType(),
DescriptorElts[1]->getType(), NULL),
DescriptorElts);
std::string TypeName("gc_map.");
TypeName += utostr(NumMeta);