John McCall 0217dfc2ba Perform zero-initialization of virtual base classes when emitting ...

a zero constant for a complete class.  rdar://problem/8424975

To make this happen, track the field indexes for virtual bases
in the complete object.  I'm curious whether we might be better
off making CGRecordLayoutBuilder *much* more reliant on
ASTRecordLayout;  we're currently duplicating an awful lot of the ABI
layout logic.

llvm-svn: 125555

2011-02-15 06:40:56 +00:00

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