Reid Kleckner 1ec250a32f musttail: Only set the inreg flag for fastcall and vectorcall ...

Otherwise we'll attempt to forward ECX, EDX, and EAX for cdecl and
stdcall thunks, leaving us with no scratch registers for indirect call
targets.

Fixes PR22052.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225729 91177308-0d34-0410-b5e6-96231b3b80d8

2015-01-12 23:28:23 +00:00

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