Hi Reid,

This commit from May 2014 causes a really bad regression when compiling
PowerPC code.  I have submitted a bug report here:

https://llvm.org/bugs/show_bug.cgi?id=23097

I have checked and can confirm that reverting this commit fixes the
problem for me.  But, since my understanding of this code is not great,
I really don't know what else might now be broken.

I assume there is a better fix than to revert your commit.  Any ideas?

Thanks
Andy


Author: rnk
Date: Tue May 13 17:05:45 2014
New Revision: 208733

URL: http://llvm.org/viewvc/llvm-project?rev=208733&view=rev
Log:
Push record return type classification into CGCXXABI

In the Microsoft C++ ABI, instance methods always return records
indirectly via the second hidden parameter.  This was implemented in
X86_32ABIInfo, but not WinX86_64ABIInfo.

Rather than exposing a handful of boolean methods in the CGCXXABI
interface, we can expose a single method that applies C++ ABI return
value classification rules.

Modified:
   cfe/trunk/lib/CodeGen/CGCXXABI.h
   cfe/trunk/lib/CodeGen/ItaniumCXXABI.cpp
   cfe/trunk/lib/CodeGen/MicrosoftCXXABI.cpp
   cfe/trunk/lib/CodeGen/TargetInfo.cpp
   cfe/trunk/test/CodeGenCXX/microsoft-abi-sret-and-byval.cpp

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