fix CreateTempAlloca to not set a name on the alloca for temporaries
in release-assert builds.  For automatic variables, explicitly set
a name with setName that does not make a temporary std::string.

This speeds up -emit-llvm-only -disable-free on PR3810 by 4.6%


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67459 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed