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Add a new wrapper node for a DILexicalBlock that encapsulates it and a

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file. Since it should only be used when necessary propagate it through
the backend code generation and tweak testcases accordingly.

This helps with code like in clang's test/CodeGen/debug-info-line.c where
we have multiple #line directives within a single lexical block and want
to generate only a single block that contains each file change.

Part of rdar://10246360

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141729 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2011-10-11 22:59:11 +00:00
parent 5ba7b501fd
commit 6618a241f7
10 changed files with 115 additions and 10 deletions
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12
lib/Analysis/DIBuilder.cpp
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@ -851,6 +851,18 @@ DINameSpace DIBuilder::createNameSpace(DIDescriptor Scope, StringRef Name,
return DINameSpace(MDNode::get(VMContext, Elts));
}
/// createLexicalBlockFile - This creates a new MDNode that encapsulates
/// an existing scope with a new filename.
DILexicalBlockFile DIBuilder::createLexicalBlockFile(DIDescriptor Scope,
DIFile File) {
Value *Elts[] = {
GetTagConstant(VMContext, dwarf::DW_TAG_lexical_block),
Scope,
File
};
return DILexicalBlockFile(MDNode::get(VMContext, Elts));
}
DILexicalBlock DIBuilder::createLexicalBlock(DIDescriptor Scope, DIFile File,
unsigned Line, unsigned Col) {
// Defeat MDNode uniqing for lexical blocks by using unique id.