2cab2431d5
Certain alternatives of *vec_tf_to_v1tf use "v" constraint for its TFmode source operand. Therefore it is assigned to VEC_REGS class, and when it is reloaded using *movtf_64, whose relevant alternatives need FP_REGS, LRA loops and ICE happens. The reason is that register class mismatch causes LRA to emit another reload, which triggers this issue again. Fix by using "f" constraint, which is more appropriate for FP register pairs anyway. gcc/ChangeLog: 2020-09-02 Ilya Leoshkevich <iii@linux.ibm.com> * config/s390/vector.md(*vec_tf_to_v1tf): Use "f" instead of "v" for the source operand. |
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