[PATCH] D105525: [GISel] Add fpext/fptrunc combines

[Patrick Nappa via Phabricator via llvm-commits]

pnappa created this revision.
pnappa added reviewers: aditya_nandakumar, arsenm, paquette, aemerson.
Herald added subscribers: hiraditya, kristof.beyls.
pnappa requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Adds the following combines, plus AArch64 tests:

- (fptrunc (fpext x)) -> x, when dest and source types match.
- (fptrunc ([us]itofp x)) -> ([us]itofp x)
- (fpext C) -> C
- (fpext ([us]itofp x)) -> ([us]itofp x), when x is 8 bit, or unsafe math is enabled.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D105525

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/combine-ext.mir
  llvm/test/CodeGen/AArch64/GlobalISel/combine-fpext-suitofp.mir
  llvm/test/CodeGen/AArch64/GlobalISel/combine-fptrunc.mir

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