[PATCH] D49200: [DAGCombine] Improve Load-Store Forwarding

[Nirav Dave via Phabricator via llvm-commits]

niravd created this revision.
niravd added reviewers: RKSimon, rnk, kparzysz.
Herald added subscribers: atanasyan, hiraditya, nemanjai, sdardis.
Herald added a reviewer: javed.absar.

Extend analysis forwarding loads from preceeding stores to work with
extended loads and truncated stores to the same address so long as the
load is fully subsumed by the store.

Hexagon's swp-epilog-phis.ll and swp-memrefs-epilog1.ll test are
deleted as they've no longer seem to be relevant.


Repository:
  rL LLVM

https://reviews.llvm.org/D49200

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AArch64/arm64-ld-from-st.ll
  llvm/test/CodeGen/AArch64/regress-tblgen-chains.ll
  llvm/test/CodeGen/Hexagon/clr_set_toggle.ll
  llvm/test/CodeGen/Hexagon/swp-epilog-phis.ll
  llvm/test/CodeGen/Hexagon/swp-memrefs-epilog1.ll
  llvm/test/CodeGen/Mips/cconv/vector.ll
  llvm/test/CodeGen/Mips/indirect-jump-hazard/jumptables.ll
  llvm/test/CodeGen/Mips/o32_cc_byval.ll
  llvm/test/CodeGen/Mips/o32_cc_vararg.ll
  llvm/test/CodeGen/PowerPC/addi-offset-fold.ll
  llvm/test/CodeGen/PowerPC/pr13891.ll
  llvm/test/CodeGen/SystemZ/store_nonbytesized_vecs.ll
  llvm/test/CodeGen/X86/i386-shrink-wrapping.ll
  llvm/test/CodeGen/X86/pr32108.ll
  llvm/test/CodeGen/X86/win64_vararg.ll

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