[cfe-dev] llvm::sort - A new wrapper to std::sort

[Grang, Mandeep Singh via cfe-dev]

r327219 added a new wrapper function called *llvm::sort*. If 
EXPENSIVE_CHECKS is enabled, llvm::sort will randomly shuffle the 
container before invoking std::sort. This will help uncover 
non-deterministic ordering of objects having the same key.

All occurrences of std::sort have been changed to llvm::sort in 
llvm/clang/polly repos.

Going forward please make sure to avoid use of std::sort and instead use 
llvm::sort. Maybe we should add a note on the usage of llvm::sort to the 
LLVM Coding Standards?

Thanks,
Mandeep

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