r272233 introduced a large number of execution failures on SVE.
The patch hard-coded an IV step of VF, but for SLP groups it needs
to be VF * group size.
Also, iv_precision had type widest_int but only needs to be unsigned int.
2019-06-18 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* tree-vect-loop-manip.c (vect_set_loop_masks_directly): Remove
vf parameter. Restore the previous iv step of nscalars_step,
but give it iv_type rather than compare_type. Tweak code order
to match the comments.
(vect_set_loop_condition_masked): Update accordingly.
* tree-vect-loop.c (vect_verify_full_masking): Use "unsigned int"
for iv_precision. Tweak comment formatting.
From-SVN: r272411
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