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Age	Commit message (Collapse)	Author
2017-08-30	Canonicalize the representation of empty an expression in ↵	Adrian Prantl
	DIGlobalVariableExpression This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
2017-02-08	Fix bitcode upgrade for DIGlobalVariables with a var: field.	Adrian Prantl
	This is a follow-up to https://reviews.llvm.org/D29349. It turns out that NeedUpgradeToDIGlobalVariableExpression is always necessary when we encountered a version==0 record because it may always be referenced via a list of globals in a DICompileUnit. My tests weren't good enough to catch this though. To trigger this case, we need much older bitcode produced by LLVM around version 3.7. <rdar://problem/30404262> Differential Revision: https://reviews.llvm.org/D29693 llvm-svn: 294488