Nico Weber 1359d654e3 Update microsoftDemangle() to work more like itaniumDemangle().
* Use same method of initializing the output stream and its buffer
* Allow a nullptr Status pointer
* Don't print the mangled name on demangling error
* Write to N (if it is non-nullptr)

Differential Revision: https://reviews.llvm.org/D52104

llvm-svn: 342330
2018-09-15 18:24:20 +00:00
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