[PATCH] D86393: [GISel] Add combines for unary FP instrs with constant operand

[Michael Kitzan via Phabricator via llvm-commits]

mkitzan created this revision.
mkitzan added reviewers: aditya_nandakumar, dsanders, arsenm, jpaquette, volkan.
mkitzan added a project: LLVM.
Herald added subscribers: llvm-commits, hiraditya, kristof.beyls.
Herald added a reviewer: paquette.
mkitzan requested review of this revision.
Herald added a subscriber: wdng.

Patch adds five new `GICombinerRules`, one for each of the following unary FP instrs: `G_FNEG`, `G_FABS`, `G_FPTRUNC`, `G_FSQRT`, and `G_FLOG2`. The combine rules perform the FP operation on the constant operand and replace the original instr with the result. Patch additionally adds new combiner tests for the AArch64 target to test these new combiner rules.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86393

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-fabs.mir
  llvm/test/CodeGen/AArch64/GlobalISel/combine-flog2.mir
  llvm/test/CodeGen/AArch64/GlobalISel/combine-fneg.mir
  llvm/test/CodeGen/AArch64/GlobalISel/combine-fptrunc.mir
  llvm/test/CodeGen/AArch64/GlobalISel/combine-fsqrt.mir

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