[llvm-dev] LLVM IR allocation optimisation

Mehdi Amini via llvm-dev llvm-dev at lists.llvm.org
Wed Aug 17 00:05:52 PDT 2016

Looks like you should refer to: http://llvm.org/docs/Frontend/PerformanceTips.html#use-of-allocas <http://llvm.org/docs/Frontend/PerformanceTips.html#use-of-allocas>


> On Aug 16, 2016, at 11:55 PM, Paul Hancock via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> I couldn't find any straight answers about this, but is modern LLVM (3.7.1 in my case) "smart enough" to automatically handle "temporary variable" allocations as efficiently as possible without me needing to put them all at the very start of the function? or is building IR with allocations as they are in the original code (ie; scattered throughout the function's code) still "problematic" when it comes to performance?
> - Paul
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