[PATCH] tree-optimization: fabs(a+0.0) -> fabs(a) for non trapping case

[Matteo Nicoli]

Dear reviewers, I attached a patch for bug 121595 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121595). I signed it, and added `Reviewed-by: Andrew Pinski  <andrew.pin...@oss.qualcomm.com>` (here in CC). Best regards, Matteo

tree-optimization-121595.patch
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