[PATCH] D4276: Added llvm.is.constant intrinsic

[James Y Knight via Phabricator via llvm-commits]

jyknight updated this revision to Diff 142433.
jyknight added a comment.
Herald added a subscriber: hiraditya.

Rewrote patch significantly.

- Added support for other types.
- Deleted SelectionDAG-side IS_CONSTANT as unneeded.
- Added support in CodeGenPrepare to lower to false, as ISel cannot eliminate unreachable blocks. (similar to llvm.objectsize)

Updated and added more tests;


https://reviews.llvm.org/D4276

Files:
  llvm/docs/LangRef.rst
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/include/llvm/IR/Intrinsics.td
  llvm/lib/Analysis/ConstantFolding.cpp
  llvm/lib/CodeGen/CodeGenPrepare.cpp
  llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
  llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/Transforms/Scalar/SCCP.cpp
  llvm/test/CodeGen/Generic/is-constant.ll
  llvm/test/CodeGen/X86/is-constant.ll

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