[PATCH] D126774: [InstCombine] Use +0.0 instead of -0.0 as the FP identity for some folds

[David Sherwood via Phabricator via llvm-commits]

david-arm updated this revision to Diff 434763.
david-arm added a comment.

- Added more pattern matches for MVE targets so we detect splats of +0.0 as well as -0.0.
- Added new ConstantFP::getZero interface.
- Added more flags to the tests for more coverage.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D126774/new/

https://reviews.llvm.org/D126774

Files:
  llvm/include/llvm/IR/Constants.h
  llvm/lib/IR/Constants.cpp
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
  llvm/test/CodeGen/Thumb2/mve-pred-selectop3.ll
  llvm/test/Transforms/InstCombine/select-binop-foldable-floating-point.ll

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