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This patch adds support for gather loads of partial vectors, where the vector base or offset elements can be wider than the elements being loaded. 2019-11-16 Richard Sandiford <richard.sandiford@arm.com> gcc/ * config/aarch64/iterators.md (SVE_24, SVE_2, SVE_4): New mode iterators. * config/aarch64/aarch64-sve.md (gather_load<SVE_FULL_SD:mode><v_int_equiv>): Extend to... (gather_load<SVE_24:mode><v_int_container>): ...this. (mask_gather_load<SVE_FULL_S:mode><v_int_equiv>): Extend to... (mask_gather_load<SVE_4:mode><v_int_container>): ...this. (mask_gather_load<SVE_FULL_D:mode><v_int_equiv>): Extend to... (mask_gather_load<SVE_2:mode><v_int_container>): ...this. (*mask_gather_load<SVE_2:mode><v_int_container>_<su>xtw_unpacked): New pattern. (*mask_gather_load<SVE_FULL_D:mode><v_int_equiv>_sxtw): Extend to... (*mask_gather_load<SVE_2:mode><v_int_equiv>_sxtw): ...this. Allow the nominal extension predicate to be different from the load predicate. (*mask_gather_load<SVE_FULL_D:mode><v_int_equiv>_uxtw): Extend to... (*mask_gather_load<SVE_2:mode><v_int_equiv>_uxtw): ...this. gcc/testsuite/ * gcc.target/aarch64/sve/gather_load_1.c (TEST_LOOP): Start at 0. (TEST_ALL): Add tests for 8-bit and 16-bit elements. * gcc.target/aarch64/sve/gather_load_2.c: Update accordingly. * gcc.target/aarch64/sve/gather_load_3.c (TEST_LOOP): Start at 0. (TEST_ALL): Add tests for 8-bit and 16-bit elements. * gcc.target/aarch64/sve/gather_load_4.c: Update accordingly. * gcc.target/aarch64/sve/gather_load_5.c (TEST_LOOP): Start at 0. (TEST_ALL): Add tests for 8-bit, 16-bit and 32-bit elements. * gcc.target/aarch64/sve/gather_load_6.c: Add --param aarch64-sve-compare-costs=0. (TEST_LOOP): Start at 0. * gcc.target/aarch64/sve/gather_load_7.c: Add --param aarch64-sve-compare-costs=0. * gcc.target/aarch64/sve/gather_load_8.c: New test. * gcc.target/aarch64/sve/gather_load_9.c: Likewise. * gcc.target/aarch64/sve/mask_gather_load_6.c: Add --param aarch64-sve-compare-costs=0. From-SVN: r278345
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