[all-commits] [llvm/llvm-project] 9e1969: [Attributor] Derive better alignment for accessed ...

[Johannes Doerfert via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 9e19693994dce2f3f897ee90aa25296bc0e786c0
      https://github.com/llvm/llvm-project/commit/9e19693994dce2f3f897ee90aa25296bc0e786c0
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2020-04-01 (Wed, 01 Apr 2020)

  Changed paths:
    M llvm/lib/Transforms/IPO/Attributor.cpp
    M llvm/test/Transforms/Attributor/ArgumentPromotion/2008-07-02-array-indexing.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/X86/min-legal-vector-width.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/attrs.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/byval-2.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/chained.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/musttail.ll
    M llvm/test/Transforms/Attributor/ArgumentPromotion/sret.ll
    M llvm/test/Transforms/Attributor/callbacks.ll
    M llvm/test/Transforms/Attributor/dereferenceable-1.ll
    M llvm/test/Transforms/Attributor/dereferenceable-2.ll
    M llvm/test/Transforms/Attributor/heap_to_stack.ll
    M llvm/test/Transforms/Attributor/misc.ll
    M llvm/test/Transforms/Attributor/range.ll
    M llvm/test/Transforms/Attributor/readattrs.ll
    M llvm/test/Transforms/Attributor/value-simplify.ll

  Log Message:
  -----------
  [Attributor] Derive better alignment for accessed pointers

Use DL & ABI information for better alignment deduction, e.g., if a type
is accessed and the ABI specifies an alignment requirement for such an
access we can use it. This is based on a patch by @lebedev.ri and
inspired by getBaseAlign in Loads.cpp.

Depends on D76673.

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D76674