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Author SHA1 Message Date
Reid Kleckner ab2090d107 MS ABI: Use musttail for vtable thunks that pass arguments by value 
This moves some memptr specific code into the generic thunk emission
codepath.

Fixes PR20053.

Reviewers: majnemer

Differential Revision: http://reviews.llvm.org/D4613

llvm-svn: 214004
 2014-07-26 01:34:32 +00:00
Reid Kleckner 966abe7614 MS ABI: Use musttail for thunk IR generation 
This allows us to perfectly forward non-trivial arguments that use
inalloca.

We still can't forward non-trivial arguments through thunks when we have
a covariant return type with a non-trivial adjustment.  This would
require emitting an extra copy, which is non-conforming anyway.

llvm-svn: 208927
 2014-05-15 23:01:46 +00:00