[Diffusion] rGb53d44fe4741: [EarlyCSE][ConstantFolding] add tests for atan/atan2; NFC

[Mohammed Nurul Hoque via Phabricator via llvm-commits]

mohammed-nurulhoque added a comment.

This is the failing test

  define float @callatan0() {
  ; CHECK-LABEL: @callatan0(
  ; CHECK-NEXT:    [[CALL:%.*]] = call float @atanf(float -0.000000e+00)
  ; CHECK-NEXT:    ret float -0.000000e+00
  ;
    %call = call float @atanf(float -0.0)
    ret float %call
  }

The aix-ppc64 clang is producing `ret float 0.000000e+00` (+0.0 instead of -0.0). As per the quoted rule above from POSIX, the result should be -0.0.


BRANCHES
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Users:
  mohammed-nurulhoque (Author)
  spatel (Committer)

https://reviews.llvm.org/rGb53d44fe4741