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71bfc8c33e
This patch adds a shuffle_slide_patterns to expand_vec_perm_const.
It recognizes permutations like
{0, 1, 4, 5}
or
{2, 3, 6, 7}
which can be constructed by a slideup or slidedown of one of the vectors
into the other one.
gcc/ChangeLog:
* config/riscv/riscv-v.cc (shuffle_slide_patterns): New.
(expand_vec_perm_const_1): Call new function.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/vls-vlmax/shuffle-slide-run.c: New test.
* gcc.target/riscv/rvv/autovec/vls-vlmax/shuffle-slide.c: New test.
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