[llvm-dev] UD and DU chains for LLVM IR before running mem2reg

[David Chisnall via llvm-dev]

On 25 May 2017, at 12:54, Jajoo, Malhar via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> The use-def and def-use chains provided by llvm::Value class ,
> would they work for IR that has not been optimized by the "mem2reg" pass ?
> ( ie, IR code that contains memory interactions and is not in SSA form yet )

It depends on what you mean by ‘work’.  They will exist and will link instructions, but all loads and stores to an alloca will appear as uses of that alloca.

David