tree 4bcc635ad0c494119140dd9cbefa225832b46a4f
parent 55066b83612b6bcc8c38ef6a84e5230ad116730f
author Jonas Paulsson <paulson1@linux.ibm.com> 1745485551 -0600
committer GitHub <noreply@github.com> 1745485551 +0200
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[SystemZ] Add DAGCombine for FCOPYSIGN to remove rounding. (#136131)

Add a DAGCombine for FCOPYSIGN that removes the rounding which is never
needed as the sign bit is already in the correct place. This helps in particular the
rounding to f16 case which needs a libcall.

Also remove the roundings for other FP VTs and simplify the CPSDR
patterns correspondingly.

fp-copysign-03.ll test updated, now also covering the other FP VT
combinations.