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3 Commits

Author SHA1 Message Date
David Majnemer bc02d32f4d MS ABI: Mangle virtual member pointer thunks with the correct CC 
Virtual member pointers are implemented using a thunk.  We assumed that
the calling convention for this thunk was always __thiscall for 32-bit
targets and __cdecl for 64-bit targets.  However, this is not the case.
Mangle in whichever calling convention is appropriate for this member
function thunk.

llvm-svn: 232254
 2015-03-14 06:34:41 +00:00
David Majnemer 8c9cdb6573 MS ABI: Virtual member pointer thunks should be in COMDAT groups 
They can be emitted by multiple translation units and thus belong in a
COMDAT group.

llvm-svn: 226630
 2015-01-21 01:21:31 +00:00
Reid Kleckner c34735148f Make all virtual member pointers use variadic musttail calls 
This avoids encoding information about the function prototype into the
thunk at the cost of some function prototype bitcast gymnastics.

Fixes PR20653.

llvm-svn: 216782
 2014-08-29 21:43:29 +00:00