[PATCH] D58863: [X86] Enable 8-bit OR with disjoint bits to conver to LEA

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: spatel, RKSimon.
Herald added a subscriber: jdoerfert.

We already support 8-bits adds in convertToThreeAddress. But we can also support 8-bit OR if the bits are disjoint. We already do this for 16/32/64.


https://reviews.llvm.org/D58863

Files:
  lib/Target/X86/X86InstrCompiler.td
  lib/Target/X86/X86InstrFoldTables.cpp
  lib/Target/X86/X86InstrInfo.cpp
  lib/Target/X86/X86InstrInfo.h
  lib/Target/X86/X86MCInstLower.cpp
  lib/Target/X86/X86MacroFusion.cpp
  test/CodeGen/X86/bitreverse.ll
  test/CodeGen/X86/bool-math.ll
  test/CodeGen/X86/fshl.ll
  test/CodeGen/X86/select.ll
  test/CodeGen/X86/select_const.ll
  test/CodeGen/X86/unfold-masked-merge-scalar-constmask-innerouter.ll
  test/CodeGen/X86/unfold-masked-merge-scalar-constmask-interleavedbits.ll
  test/CodeGen/X86/unfold-masked-merge-scalar-constmask-interleavedbytehalves.ll
  test/CodeGen/X86/unfold-masked-merge-scalar-constmask-lowhigh.ll
  test/CodeGen/X86/vector-bitreverse.ll

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