f31e515fd5
r278235 broke conversions of vector/scalar shifts into vector/vector shifts on targets that only provide the latter. We need to record whether a conversion is required in that case too. Also, the old useless_type_conversion_p condition seemed unnecessarily strong, since the shift amount can have a different signedness from the shifted value and its vector type is never assumed to be identical to vectype. The patch therefore uses tree_nop_conversion_p instead. 2019-11-15 Richard Sandiford <richard.sandiford@arm.com> gcc/ PR tree-optimization/92515 * tree-vect-stmts.c (vectorizable_shift): Record incompatible op1 types when converting a vector/scalar shift into a vector/vector one, using tree_nop_conversion_p instead of useless_type_conversion_p. Move the conversion code to the transform block. From-SVN: r278295 |
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