Implement MipsABIInfo::EmitVAArg. This fix enables clang to complete compilation without bailing out when va_arg is an aggregate expression. However,  alignment checking needs to be added in isSafeToEliminateVarargsCast in InstCombineCalls.cpp in order to produce correct mips code (see link below).
Implement MipsABIInfo::EmitVAArg. This fix enables clang to complete compilation
without bailing out when va_arg is an aggregate expression. However, 
alignment checking needs to be added in isSafeToEliminateVarargsCast in
InstCombineCalls.cpp in order to produce correct mips code (see link below).

http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-July/042047.html





git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@136647 91177308-0d34-0410-b5e6-96231b3b80d8

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