[PATCH] D136396: [X86] Enable reassociation for ADD instructions

[Guozhi Wei via Phabricator via llvm-commits]

Carrot created this revision.
Carrot added reviewers: spatel, craig.topper.
Herald added subscribers: StephenFan, pengfei, hiraditya.
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ADD is an associative and commutative operation, so we can do reassociation for it.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136396

Files:
  llvm/lib/Target/X86/X86InstrInfo.cpp
  llvm/test/CodeGen/X86/2009-03-23-MultiUseSched.ll
  llvm/test/CodeGen/X86/DynamicCalleeSavedRegisters.ll
  llvm/test/CodeGen/X86/add-sub-bool.ll
  llvm/test/CodeGen/X86/alias-static-alloca.ll
  llvm/test/CodeGen/X86/avx512-intrinsics-x86_64.ll
  llvm/test/CodeGen/X86/avx512-intrinsics.ll
  llvm/test/CodeGen/X86/avx512-regcall-Mask.ll
  llvm/test/CodeGen/X86/avx512-regcall-NoMask.ll
  llvm/test/CodeGen/X86/avx512bw-intrinsics-upgrade.ll
  llvm/test/CodeGen/X86/div-rem-pair-recomposition-signed.ll
  llvm/test/CodeGen/X86/div-rem-pair-recomposition-unsigned.ll
  llvm/test/CodeGen/X86/divide-by-constant.ll
  llvm/test/CodeGen/X86/divmod128.ll
  llvm/test/CodeGen/X86/fold-add.ll
  llvm/test/CodeGen/X86/fold-tied-op.ll
  llvm/test/CodeGen/X86/h-registers-1.ll
  llvm/test/CodeGen/X86/hipe-cc.ll
  llvm/test/CodeGen/X86/hipe-cc64.ll
  llvm/test/CodeGen/X86/imul.ll
  llvm/test/CodeGen/X86/lea-opt-cse4.ll
  llvm/test/CodeGen/X86/lea-opt2.ll
  llvm/test/CodeGen/X86/lrshrink.ll
  llvm/test/CodeGen/X86/midpoint-int.ll
  llvm/test/CodeGen/X86/misched-balance.ll
  llvm/test/CodeGen/X86/misched-matrix.ll
  llvm/test/CodeGen/X86/mul-constant-i16.ll
  llvm/test/CodeGen/X86/mul-constant-i32.ll
  llvm/test/CodeGen/X86/mul-constant-i64.ll
  llvm/test/CodeGen/X86/mul-i1024.ll
  llvm/test/CodeGen/X86/mul-i256.ll
  llvm/test/CodeGen/X86/mul-i512.ll
  llvm/test/CodeGen/X86/mul128.ll
  llvm/test/CodeGen/X86/mul64.ll
  llvm/test/CodeGen/X86/muloti.ll
  llvm/test/CodeGen/X86/popcnt.ll
  llvm/test/CodeGen/X86/pr34080-2.ll
  llvm/test/CodeGen/X86/pr36865.ll
  llvm/test/CodeGen/X86/reassociate-add.ll
  llvm/test/CodeGen/X86/smul-with-overflow.ll
  llvm/test/CodeGen/X86/smul_fix.ll
  llvm/test/CodeGen/X86/smul_fix_sat.ll
  llvm/test/CodeGen/X86/smulo-128-legalisation-lowering.ll
  llvm/test/CodeGen/X86/sse-regcall.ll
  llvm/test/CodeGen/X86/stack-clash-large.ll
  llvm/test/CodeGen/X86/statepoint-live-in.ll
  llvm/test/CodeGen/X86/statepoint-regs.ll
  llvm/test/CodeGen/X86/swift-return.ll
  llvm/test/CodeGen/X86/twoaddr-lea.ll
  llvm/test/CodeGen/X86/umul-with-overflow.ll
  llvm/test/CodeGen/X86/umul_fix.ll
  llvm/test/CodeGen/X86/urem-seteq-nonzero.ll
  llvm/test/CodeGen/X86/vec_smulo.ll
  llvm/test/CodeGen/X86/vp2intersect_multiple_pairs.ll
  llvm/test/CodeGen/X86/win-smallparams.ll
  llvm/test/CodeGen/X86/x86-cmov-converter.ll
  llvm/test/CodeGen/X86/x86-no_caller_saved_registers-preserve.ll
  llvm/test/CodeGen/X86/xmulo.ll