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With this change, most 'g' options are rejected by CompilerInvocation.
They remain only as Driver options. The new way to request debug info
from cc1 is with "-debug-info-kind={line-tables-only|limited|standalone}"
and "-dwarf-version={2|3|4}". In the absence of a command-line option
to specify Dwarf version, the Toolchain decides it, rather than placing
Toolchain-specific logic in CompilerInvocation.

Also fix a bug in the Windows compatibility argument parsing
in which the "rightmost argument wins" principle failed.

Differential Revision: http://reviews.llvm.org/D13221

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Summary: Temporary XFAIL's until patches done.

Reviewers: echristo, adasgupt, colinl

Reviewed By: colinl

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8044

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Emitting inlinable calls without debug locations (in functions with
debug info, to functions with debug info) is problematic for debug info
when inlining occurs. Test specifically that we don't do that in this
case - thus the test isn't simply "don't crash", it's "include debug
location for this call" (granted it's the wrong location - fix for that
is coming)

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Shorter and doesn't need -O2 -- but still suboptimal as it's still doing
-emit-obj.  dblaikie says he'll improve this when he'll reland his change
with a fix.


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PR22096 has several test cases that assert that look fairly different. I'm
adding one of those as an automated test, but when relanding the other cases
should probably be checked as well.


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