[PATCH] D40969: [DAG] Elide overlapping store

[Nirav Dave via Phabricator via llvm-commits]

niravd created this revision.
Herald added subscribers: hiraditya, javed.absar.

Extend overlapping store elision to handle overwrites of stores by
larger stores.

Nontemporal tests have been modified to add memory dependencies to
prevent store elision.


https://reviews.llvm.org/D40969

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AArch64/ldst-paired-aliasing.ll
  llvm/test/CodeGen/X86/avx2-nontemporal.ll
  llvm/test/CodeGen/X86/avx512-nontemporal.ll
  llvm/test/CodeGen/X86/avx512vl-nontemporal.ll
  llvm/test/CodeGen/X86/nontemporal.ll

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