Otherwise, in some extreme test case, very long names are created and the
compiler consumes large amount of memory. Size limit is set to a relatively
high value not to disturb debugging.
Compiler flag -non-global-value-max-name-size=<value> can be used to customize
the size.
Differential Revision: https://reviews.llvm.org/D41296
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321886 91177308-0d34-0410-b5e6-96231b3b80d8