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Add support for a temporary forward decl type. We want this so we

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can rauw forward declarations if we decide to emit the full type.

Part of rdar://10809898

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150024 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2012-02-08 00:22:26 +00:00
parent 9f99721a18
commit 4fe3457292
2 changed files with 26 additions and 0 deletions
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4
include/llvm/Analysis/DIBuilder.h
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@ -341,6 +341,10 @@ namespace llvm {
DIType createTemporaryType();
DIType createTemporaryType(DIFile F);
/// createForwardDecl - Create a temporary forward-declared type.
DIType createForwardDecl(unsigned Tag, StringRef Name, DIFile F,
unsigned Line);
/// retainType - Retain DIType in a module even if it is not referenced
/// through debug info anchors.
void retainType(DIType T);

22
lib/Analysis/DIBuilder.cpp
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@ -669,6 +669,28 @@ DIType DIBuilder::createTemporaryType(DIFile F) {
return DIType(Node);
}
/// createForwardDecl - Create a temporary forward-declared type that
/// can be RAUW'd if the full type is seen.
DIType DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIFile F,
unsigned Line) {
// Create a temporary MDNode.
Value *Elts[] = {
GetTagConstant(VMContext, Tag),
NULL, // TheCU
MDString::get(VMContext, Name),
F,
ConstantInt::get(Type::getInt32Ty(VMContext), Line),
// To ease transition include sizes etc of 0.
ConstantInt::get(Type::getInt32Ty(VMContext), 0),
ConstantInt::get(Type::getInt32Ty(VMContext), 0),
ConstantInt::get(Type::getInt32Ty(VMContext), 0),
ConstantInt::get(Type::getInt32Ty(VMContext),
DIDescriptor::FlagFwdDecl)
};
MDNode *Node = MDNode::getTemporary(VMContext, Elts);
return DIType(Node);
}
/// getOrCreateArray - Get a DIArray, create one if required.
DIArray DIBuilder::getOrCreateArray(ArrayRef<Value *> Elements) {
if (Elements.empty()) {