[PATCH] D61331: [SelectionDAG] remove constant folding limitations based on FP exceptions

[Sanjay Patel via Phabricator via llvm-commits]

spatel created this revision.
spatel added reviewers: cameron.mcinally, kpn, greened, mcberg2017, efriedma.
Herald added subscribers: aheejin, hiraditya, jgravelle-google, sbc100, javed.absar, nhaehnle, jvesely, mcrosier, dschuff, arsenm.
Herald added a project: LLVM.

We don't have any FP exception limits in the IR constant folder (apart from strict ops), so I don't think it makes sense to have them here in the DAG either. Nothing else in the backend tries to preserve those (again outside of strict ops), so I don't see how this could have ever worked for real code that cares about FP exceptions.


https://reviews.llvm.org/D61331

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/CodeGen/TargetLoweringBase.cpp
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
  llvm/test/CodeGen/AArch64/fp-const-fold.ll

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