Commit Graph

3 Commits

Author SHA1 Message Date
David Majnemer 040fa34bec MS ABI: Use '1' (instead of '0') relative scope discriminators
This changes the scope discriminator's behavior to start at '1' instead
of '0'.  Symbol table diffing, for ABI compatibility testing, kept
finding these as false positives.

llvm-svn: 219075
2014-10-05 06:44:53 +00:00
David Majnemer 2e1e0491b7 MS ABI: Support mangling of return-types deducing to local types
The MS ABI forces us into catch-22 when it comes to functions which
return types which are local:

 - A function is mangled with it's return type.
 - A type is mangled with it's surrounding context.

Avoid this by mangling auto and decltype(autp) directly into the
function's return type.  Using this mangling has the double advantage of
being compatible with the C++ standard without crashing the compiler.

N.B. For the curious, the MSVC mangling leads to collisions amongst
template functions and either crashes when faced with local types or is
otherwise incapable of returning them.

llvm-svn: 205282
2014-04-01 05:29:46 +00:00
David Majnemer 8f77453f7c MS ABI: Mangle variable templates properly
We wouldn't recognize variable templates as being templates leading us
to leave the template arguments off of the mangled name.  This would
allow two unrelated templates to map to the same mangled name.

N.B.  While MSVC doesn't support variable templates as of this date,
this mangling is the most likely thing they will choose to use.  Their
demangler can successfully demangle our manglings with the template
arguments shown.

llvm-svn: 202789
2014-03-04 05:38:05 +00:00