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Commit 642a0acc authored by Manman Ren's avatar Manman Ren
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Debug Info: code clean up. 

Remove unnecessary creation of LexicalScope in collectDeadVariables.
The created LexicialScope was only used to get isAbstractScope, which
should be false from the creation:
"new LexicalScope(NULL, DIDescriptor(SP), NULL, false);".

We can also remove a DenseMap that holds the created LexicalScopes.

llvm-svn: 193196
parent 9a02765b
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