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Add support for a temporary forward decl type. We want this so we
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
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@ -341,6 +341,10 @@ namespace llvm {
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DIType createTemporaryType();
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DIType createTemporaryType(DIFile F);
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/// createForwardDecl - Create a temporary forward-declared type.
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DIType createForwardDecl(unsigned Tag, StringRef Name, DIFile F,
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unsigned Line);
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/// retainType - Retain DIType in a module even if it is not referenced
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/// through debug info anchors.
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void retainType(DIType T);
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@ -669,6 +669,28 @@ DIType DIBuilder::createTemporaryType(DIFile F) {
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return DIType(Node);
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}
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/// createForwardDecl - Create a temporary forward-declared type that
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/// can be RAUW'd if the full type is seen.
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DIType DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIFile F,
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unsigned Line) {
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// Create a temporary MDNode.
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Value *Elts[] = {
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GetTagConstant(VMContext, Tag),
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NULL, // TheCU
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MDString::get(VMContext, Name),
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F,
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ConstantInt::get(Type::getInt32Ty(VMContext), Line),
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// To ease transition include sizes etc of 0.
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ConstantInt::get(Type::getInt32Ty(VMContext), 0),
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ConstantInt::get(Type::getInt32Ty(VMContext), 0),
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ConstantInt::get(Type::getInt32Ty(VMContext), 0),
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ConstantInt::get(Type::getInt32Ty(VMContext),
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DIDescriptor::FlagFwdDecl)
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};
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MDNode *Node = MDNode::getTemporary(VMContext, Elts);
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return DIType(Node);
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}
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/// getOrCreateArray - Get a DIArray, create one if required.
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DIArray DIBuilder::getOrCreateArray(ArrayRef<Value *> Elements) {
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if (Elements.empty()) {
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