[PATCH] D150107: [X86] Remove patterns for shift/rotate with immediate 1 and update side effect

[Kan Shengchen via Phabricator via llvm-commits]

skan created this revision.
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Herald added a reviewer: lebedev.ri.
Herald added a reviewer: lebedev.ri.
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skan requested review of this revision.
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1. Do encoding optimization during MC lowering so that we can drop the patterns for shift/rotate with immediate 1
2. Set mayLoad = 1 for shift/rotate with a memory operand


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150107

Files:
  llvm/lib/Target/X86/X86InstrShiftRotate.td
  llvm/lib/Target/X86/X86MCInstLower.cpp
  llvm/test/CodeGen/X86/GlobalISel/ashr-scalar.ll
  llvm/test/CodeGen/X86/GlobalISel/lshr-scalar.ll
  llvm/test/CodeGen/X86/GlobalISel/select-ashr-scalar.mir
  llvm/test/CodeGen/X86/GlobalISel/select-lshr-scalar.mir
  llvm/test/CodeGen/X86/fast-isel-shift.ll
  llvm/test/CodeGen/X86/gpr-to-mask.ll
  llvm/test/CodeGen/X86/is_fpclass.ll
  llvm/test/tools/llvm-mca/X86/AlderlakeP/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Atom/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Barcelona/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/BdVer2/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Broadwell/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/BtVer2/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Generic/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Haswell/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/IceLakeServer/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/SLM/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/SandyBridge/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/SkylakeClient/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/SkylakeServer/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Znver1/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Znver2/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Znver3/resources-x86_64.s
  llvm/test/tools/llvm-mca/X86/Znver4/resources-x86_64.s

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