[PATCH] D106397: [Attributor] Use CFG reasoning to filter potentially interfering writes

[Johannes Doerfert via Phabricator via llvm-commits]

jdoerfert created this revision.
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Since D104432 <https://reviews.llvm.org/D104432> we can look through memory by analyzing all writes that
might interfere with a load. This patch provides some logic to exclude
writes that cannot interfere with a location, due to CFG reasoning.
We make sure to avoid multi-thread write-read situations properly while
we ignore writes that cannot reach a load or writes that will be
overwritten before the load is reached.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106397

Files:
  llvm/include/llvm/Transforms/IPO/Attributor.h
  llvm/lib/Transforms/IPO/AttributorAttributes.cpp
  llvm/test/Transforms/Attributor/ArgumentPromotion/X86/attributes.ll
  llvm/test/Transforms/Attributor/ArgumentPromotion/X86/min-legal-vector-width.ll
  llvm/test/Transforms/Attributor/ArgumentPromotion/attrs.ll
  llvm/test/Transforms/Attributor/ArgumentPromotion/byval.ll
  llvm/test/Transforms/Attributor/IPConstantProp/2009-09-24-byval-ptr.ll
  llvm/test/Transforms/Attributor/heap_to_stack.ll
  llvm/test/Transforms/Attributor/heap_to_stack_gpu.ll
  llvm/test/Transforms/Attributor/misc.ll
  llvm/test/Transforms/Attributor/noalias.ll
  llvm/test/Transforms/Attributor/value-simplify-pointer-info.ll

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