mirror of git://gcc.gnu.org/git/gcc.git
f22d79731a
This patch rewrites the SVE comparison handling so that it uses UNSPEC_MERGE_PTRUE for comparisons that are known to be predicated on a PTRUE, for consistency with other patterns. Specific unspecs are then only needed for truly predicated floating-point comparisons, such as those used in the expansion of UNEQ for flag_trapping_math. The patch also makes sure that the comparison expanders attach a REG_EQUAL note to instructions that use UNSPEC_MERGE_PTRUE, so passes can use that as an alternative to the unspec pattern. (This happens automatically for optabs. The problem was that this code emits instruction patterns directly.) No specific benefit on its own, but it lays the groundwork for the next patch. 2018-05-08 Richard Sandiford <richard.sandiford@linaro.org> gcc/ * config/aarch64/iterators.md (UNSPEC_COND_LO, UNSPEC_COND_LS) (UNSPEC_COND_HI, UNSPEC_COND_HS, UNSPEC_COND_UO): Delete. (SVE_INT_CMP, SVE_FP_CMP): New code iterators. (cmp_op, sve_imm_con): New code attributes. (SVE_COND_INT_CMP, imm_con): Delete. (cmp_op): Remove above unspecs from int attribute. * config/aarch64/aarch64-sve.md (*vec_cmp<cmp_op>_<mode>): Rename to... (*cmp<cmp_op><mode>): ...this. Use UNSPEC_MERGE_PTRUE instead of comparison-specific unspecs. (*vec_cmp<cmp_op>_<mode>_ptest): Rename to... (*cmp<cmp_op><mode>_ptest): ...this and adjust likewise. (*vec_cmp<cmp_op>_<mode>_cc): Rename to... (*cmp<cmp_op><mode>_cc): ...this and adjust likewise. (*vec_fcm<cmp_op><mode>): Rename to... (*fcm<cmp_op><mode>): ...this and adjust likewise. (*vec_fcmuo<mode>): Rename to... (*fcmuo<mode>): ...this and adjust likewise. (*pred_fcm<cmp_op><mode>): New pattern. * config/aarch64/aarch64.c (aarch64_emit_unop, aarch64_emit_binop) (aarch64_emit_sve_ptrue_op, aarch64_emit_sve_ptrue_op_cc): New functions. (aarch64_unspec_cond_code): Remove handling of LTU, GTU, LEU, GEU and UNORDERED. (aarch64_gen_unspec_cond, aarch64_emit_unspec_cond): Delete. (aarch64_emit_sve_predicated_cond): New function. (aarch64_expand_sve_vec_cmp_int): Use aarch64_emit_sve_ptrue_op_cc. (aarch64_emit_unspec_cond_or): Replace with... (aarch64_emit_sve_or_conds): ...this new function. Use aarch64_emit_sve_ptrue_op for the individual comparisons and aarch64_emit_binop to OR them together. (aarch64_emit_inverted_unspec_cond): Replace with... (aarch64_emit_sve_inverted_cond): ...this new function. Use aarch64_emit_sve_ptrue_op for the comparison and aarch64_emit_unop to invert the result. (aarch64_expand_sve_vec_cmp_float): Update after the above changes. Use aarch64_emit_sve_ptrue_op for native comparisons. From-SVN: r260029 |
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