Jonas Paulsson 94a14f9f0d [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.

2025-04-24 11:05:51 +02:00

424 KiB

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