d1d20a49a7
This patch adds support for fully-masking loops that require peeling for gaps. It peels exactly one scalar iteration and uses the masked loop to handle the rest. Previously we would fall back on using a standard unmasked loop instead. 2018-01-13 Richard Sandiford <richard.sandiford@linaro.org> Alan Hayward <alan.hayward@arm.com> David Sherwood <david.sherwood@arm.com> gcc/ * tree-vect-loop-manip.c (vect_gen_scalar_loop_niters): Replace vfm1 with a bound_epilog parameter. (vect_do_peeling): Update calls accordingly, and move the prologue call earlier in the function. Treat the base bound_epilog as 0 for fully-masked loops and retain vf - 1 for other loops. Add 1 to this base when peeling for gaps. * tree-vect-loop.c (vect_analyze_loop_2): Allow peeling for gaps with fully-masked loops. (vect_estimate_min_profitable_iters): Handle the single peeled iteration in that case. gcc/testsuite/ * gcc.target/aarch64/sve/struct_vect_18.c: Check the number of branches. * gcc.target/aarch64/sve/struct_vect_19.c: Likewise. * gcc.target/aarch64/sve/struct_vect_20.c: New test. * gcc.target/aarch64/sve/struct_vect_20_run.c: Likewise. * gcc.target/aarch64/sve/struct_vect_21.c: Likewise. * gcc.target/aarch64/sve/struct_vect_21_run.c: Likewise. * gcc.target/aarch64/sve/struct_vect_22.c: Likewise. * gcc.target/aarch64/sve/struct_vect_22_run.c: Likewise. * gcc.target/aarch64/sve/struct_vect_23.c: Likewise. * gcc.target/aarch64/sve/struct_vect_23_run.c: Likewise. Co-Authored-By: Alan Hayward <alan.hayward@arm.com> Co-Authored-By: David Sherwood <david.sherwood@arm.com> From-SVN: r256635 |
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