[PATCH] D83216: [Intrinsic] Add sshl.sat/ushl.sat, saturated shift intrinsics.

[Bevin Hansson via Phabricator via llvm-commits]

ebevhan created this revision.
ebevhan added reviewers: leonardchan, craig.topper, bjope.
Herald added subscribers: llvm-commits, jdoerfert, hiraditya.
Herald added a reviewer: jdoerfert.
Herald added a project: LLVM.

This patch adds two intrinsics, llvm.sshl.sat and llvm.ushl.sat,
which perform signed and unsigned saturating left shift,
respectively.

These are needed for implementing the Embedded-C fixed point
support in Clang.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D83216

Files:
  llvm/docs/LangRef.rst
  llvm/include/llvm/CodeGen/ISDOpcodes.h
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/include/llvm/IR/Intrinsics.td
  llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
  llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/lib/CodeGen/TargetLoweringBase.cpp
  llvm/lib/IR/Verifier.cpp
  llvm/test/CodeGen/X86/sshl_sat.ll
  llvm/test/CodeGen/X86/ushl_sat.ll

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