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# 05782218 30-Aug-2017 Adrian Prantl <[email protected]>

Canonicalize the representation of empty an expression in DIGlobalVariableExpression

This change simplifies code that has to deal with
DIGlobalVariableExpression and mirrors how we treat DIExpressio

Canonicalize the representation of empty an expression in 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

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Revision tags: llvmorg-5.0.0-rc4, llvmorg-5.0.0-rc3, llvmorg-5.0.0-rc2, llvmorg-5.0.0-rc1, llvmorg-4.0.1, llvmorg-4.0.1-rc3, llvmorg-4.0.1-rc2, llvmorg-4.0.1-rc1, llvmorg-4.0.0, llvmorg-4.0.0-rc4, llvmorg-4.0.0-rc3, llvmorg-4.0.0-rc2
# a5bf2d70 08-Feb-2017 Adrian Prantl <[email protected]>

Fix bitcode upgrade for DIGlobalVariables with a var: field.

This is a follow-up to https://reviews.llvm.org/D29349. It turns out
that NeedUpgradeToDIGlobalVariableExpression is always necessary wh

Fix bitcode upgrade for DIGlobalVariables with a var: field.

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

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