llvm dev - Dec 2021 - Structure transformations (splitting/peeling, field reordering) in LLVM

Hello!
I want to implement data layout optimizations, such as structure
splitting/peeling, field reordering, etc. I know that such optimizations
have not been implemented in LLVM (despite several research works in this
field). But maybe somebody knows, whether at least transformations
themselves (I mean splitting/peeling/reordering) are implemented in LLVM? I
feel that some time ago I saw somewhere these transformations were
implemented, maybe in some experimental part of LLVM, but now I can't find
it despite my best efforts.
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Hi,

   AFAIK, there is SROA pass in LLVM to split structure. But I don't
remember there are pass to reorder fields.

Thanks,
Chuanqi


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From:llvm-dev <llvm-dev at lists.llvm.org>
Send Time:2021年12月14日(星期二) 16:47
To:llvm-dev <llvm-dev at lists.llvm.org>
Subject:[llvm-dev] Structure transformations (splitting/peeling, field
reordering) in LLVM

Hello! 
I want to implement data layout optimizations, such as structure
splitting/peeling, field reordering, etc. I know that such optimizations have
not been implemented in LLVM (despite several research works in this field). But
maybe somebody knows, whether at least transformations themselves (I mean
splitting/peeling/reordering) are implemented in LLVM? I feel that some time ago
I saw somewhere these transformations were implemented, maybe in some
experimental part of LLVM, but now I can't find it despite my best efforts.

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