1//=- AArch64Combine.td - Define AArch64 Combine Rules ---------*-tablegen -*-=// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// 10//===----------------------------------------------------------------------===// 11 12include "llvm/Target/GlobalISel/Combine.td" 13 14def fconstant_to_constant : GICombineRule< 15 (defs root:$root), 16 (match (wip_match_opcode G_FCONSTANT):$root, 17 [{ return matchFConstantToConstant(*${root}, MRI); }]), 18 (apply [{ applyFConstantToConstant(*${root}); }])>; 19 20def icmp_redundant_trunc_matchdata : GIDefMatchData<"Register">; 21def icmp_redundant_trunc : GICombineRule< 22 (defs root:$root, icmp_redundant_trunc_matchdata:$matchinfo), 23 (match (wip_match_opcode G_ICMP):$root, 24 [{ return matchICmpRedundantTrunc(*${root}, MRI, Helper.getKnownBits(), ${matchinfo}); }]), 25 (apply [{ applyICmpRedundantTrunc(*${root}, MRI, B, Observer, ${matchinfo}); }])>; 26 27// AArch64-specific offset folding for G_GLOBAL_VALUE. 28def fold_global_offset_matchdata : GIDefMatchData<"std::pair<uint64_t, uint64_t>">; 29def fold_global_offset : GICombineRule< 30 (defs root:$root, fold_global_offset_matchdata:$matchinfo), 31 (match (wip_match_opcode G_GLOBAL_VALUE):$root, 32 [{ return matchFoldGlobalOffset(*${root}, MRI, ${matchinfo}); }]), 33 (apply [{ applyFoldGlobalOffset(*${root}, MRI, B, Observer, ${matchinfo});}]) 34>; 35 36// Boolean: 0 = G_ZEXT, 1 = G_SEXT 37def ext_addv_to_udot_addv_matchinfo : GIDefMatchData<"std::tuple<Register, Register, bool>">; 38let Predicates = [HasDotProd] in { 39def ext_addv_to_udot_addv : GICombineRule< 40 (defs root:$root, ext_addv_to_udot_addv_matchinfo:$matchinfo), 41 (match (wip_match_opcode G_VECREDUCE_ADD):$root, 42 [{ return matchExtAddvToUdotAddv(*${root}, MRI, STI, ${matchinfo}); }]), 43 (apply [{ applyExtAddvToUdotAddv(*${root}, MRI, B, Observer, STI, ${matchinfo}); }]) 44>; 45} 46 47def ext_uaddv_to_uaddlv_matchinfo : GIDefMatchData<"std::pair<Register, bool>">; 48def ext_uaddv_to_uaddlv : GICombineRule< 49 (defs root:$root, ext_uaddv_to_uaddlv_matchinfo:$matchinfo), 50 (match (wip_match_opcode G_VECREDUCE_ADD):$root, 51 [{ return matchExtUaddvToUaddlv(*${root}, MRI, ${matchinfo}); }]), 52 (apply [{ applyExtUaddvToUaddlv(*${root}, MRI, B, Observer, ${matchinfo}); }]) 53>; 54 55class push_opcode_through_ext<Instruction opcode, Instruction extOpcode> : GICombineRule < 56 (defs root:$root), 57 (match (extOpcode $ext1, $src1):$ExtMI, 58 (extOpcode $ext2, $src2), 59 (opcode $dst, $ext1, $ext2):$root, 60 [{ return matchPushAddSubExt(*${root}, MRI, ${dst}.getReg(), ${src1}.getReg(), ${src2}.getReg()); }]), 61 (apply [{ applyPushAddSubExt(*${root}, MRI, B, ${ExtMI}->getOpcode() == TargetOpcode::G_SEXT, ${dst}.getReg(), ${src1}.getReg(), ${src2}.getReg()); }])>; 62 63def push_sub_through_zext : push_opcode_through_ext<G_SUB, G_ZEXT>; 64def push_add_through_zext : push_opcode_through_ext<G_ADD, G_ZEXT>; 65def push_sub_through_sext : push_opcode_through_ext<G_SUB, G_SEXT>; 66def push_add_through_sext : push_opcode_through_ext<G_ADD, G_SEXT>; 67 68def AArch64PreLegalizerCombiner: GICombiner< 69 "AArch64PreLegalizerCombinerImpl", [all_combines, 70 fconstant_to_constant, 71 icmp_redundant_trunc, 72 fold_global_offset, 73 shuffle_to_extract, 74 ext_addv_to_udot_addv, 75 ext_uaddv_to_uaddlv, 76 push_sub_through_zext, 77 push_add_through_zext, 78 push_sub_through_sext, 79 push_add_through_sext]> { 80 let CombineAllMethodName = "tryCombineAllImpl"; 81} 82 83def AArch64O0PreLegalizerCombiner: GICombiner< 84 "AArch64O0PreLegalizerCombinerImpl", [optnone_combines]> { 85 let CombineAllMethodName = "tryCombineAllImpl"; 86} 87 88// Matchdata for combines which replace a G_SHUFFLE_VECTOR with a 89// target-specific opcode. 90def shuffle_matchdata : GIDefMatchData<"ShuffleVectorPseudo">; 91 92def rev : GICombineRule< 93 (defs root:$root, shuffle_matchdata:$matchinfo), 94 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 95 [{ return matchREV(*${root}, MRI, ${matchinfo}); }]), 96 (apply [{ applyShuffleVectorPseudo(*${root}, ${matchinfo}); }]) 97>; 98 99def zip : GICombineRule< 100 (defs root:$root, shuffle_matchdata:$matchinfo), 101 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 102 [{ return matchZip(*${root}, MRI, ${matchinfo}); }]), 103 (apply [{ applyShuffleVectorPseudo(*${root}, ${matchinfo}); }]) 104>; 105 106def uzp : GICombineRule< 107 (defs root:$root, shuffle_matchdata:$matchinfo), 108 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 109 [{ return matchUZP(*${root}, MRI, ${matchinfo}); }]), 110 (apply [{ applyShuffleVectorPseudo(*${root}, ${matchinfo}); }]) 111>; 112 113def dup: GICombineRule < 114 (defs root:$root, shuffle_matchdata:$matchinfo), 115 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 116 [{ return matchDup(*${root}, MRI, ${matchinfo}); }]), 117 (apply [{ applyShuffleVectorPseudo(*${root}, ${matchinfo}); }]) 118>; 119 120def trn : GICombineRule< 121 (defs root:$root, shuffle_matchdata:$matchinfo), 122 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 123 [{ return matchTRN(*${root}, MRI, ${matchinfo}); }]), 124 (apply [{ applyShuffleVectorPseudo(*${root}, ${matchinfo}); }]) 125>; 126 127def ext: GICombineRule < 128 (defs root:$root, shuffle_matchdata:$matchinfo), 129 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 130 [{ return matchEXT(*${root}, MRI, ${matchinfo}); }]), 131 (apply [{ applyEXT(*${root}, ${matchinfo}); }]) 132>; 133 134def insertelt_nonconst: GICombineRule < 135 (defs root:$root, shuffle_matchdata:$matchinfo), 136 (match (wip_match_opcode G_INSERT_VECTOR_ELT):$root, 137 [{ return matchNonConstInsert(*${root}, MRI); }]), 138 (apply [{ applyNonConstInsert(*${root}, MRI, B); }]) 139>; 140 141def shuf_to_ins_matchdata : GIDefMatchData<"std::tuple<Register, int, Register, int>">; 142def shuf_to_ins: GICombineRule < 143 (defs root:$root, shuf_to_ins_matchdata:$matchinfo), 144 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 145 [{ return matchINS(*${root}, MRI, ${matchinfo}); }]), 146 (apply [{ applyINS(*${root}, MRI, B, ${matchinfo}); }]) 147>; 148 149def vashr_vlshr_imm_matchdata : GIDefMatchData<"int64_t">; 150def vashr_vlshr_imm : GICombineRule< 151 (defs root:$root, vashr_vlshr_imm_matchdata:$matchinfo), 152 (match (wip_match_opcode G_ASHR, G_LSHR):$root, 153 [{ return matchVAshrLshrImm(*${root}, MRI, ${matchinfo}); }]), 154 (apply [{ applyVAshrLshrImm(*${root}, MRI, ${matchinfo}); }]) 155>; 156 157def form_duplane_matchdata : 158 GIDefMatchData<"std::pair<unsigned, int>">; 159def form_duplane : GICombineRule < 160 (defs root:$root, form_duplane_matchdata:$matchinfo), 161 (match (wip_match_opcode G_SHUFFLE_VECTOR):$root, 162 [{ return matchDupLane(*${root}, MRI, ${matchinfo}); }]), 163 (apply [{ applyDupLane(*${root}, MRI, B, ${matchinfo}); }]) 164>; 165 166def shuffle_vector_lowering : GICombineGroup<[dup, rev, ext, zip, uzp, trn, 167 form_duplane, shuf_to_ins]>; 168 169// Turn G_UNMERGE_VALUES -> G_EXTRACT_VECTOR_ELT's 170def vector_unmerge_lowering : GICombineRule < 171 (defs root:$root), 172 (match (wip_match_opcode G_UNMERGE_VALUES):$root, 173 [{ return matchScalarizeVectorUnmerge(*${root}, MRI); }]), 174 (apply [{ applyScalarizeVectorUnmerge(*${root}, MRI, B); }]) 175>; 176 177def adjust_icmp_imm_matchdata : 178 GIDefMatchData<"std::pair<uint64_t, CmpInst::Predicate>">; 179def adjust_icmp_imm : GICombineRule < 180 (defs root:$root, adjust_icmp_imm_matchdata:$matchinfo), 181 (match (wip_match_opcode G_ICMP):$root, 182 [{ return matchAdjustICmpImmAndPred(*${root}, MRI, ${matchinfo}); }]), 183 (apply [{ applyAdjustICmpImmAndPred(*${root}, ${matchinfo}, B, Observer); }]) 184>; 185 186def swap_icmp_operands : GICombineRule < 187 (defs root:$root), 188 (match (wip_match_opcode G_ICMP):$root, 189 [{ return trySwapICmpOperands(*${root}, MRI); }]), 190 (apply [{ applySwapICmpOperands(*${root}, Observer); }]) 191>; 192 193def icmp_lowering : GICombineGroup<[adjust_icmp_imm, swap_icmp_operands]>; 194 195def extractvecelt_pairwise_add_matchdata : GIDefMatchData<"std::tuple<unsigned, LLT, Register>">; 196def extractvecelt_pairwise_add : GICombineRule< 197 (defs root:$root, extractvecelt_pairwise_add_matchdata:$matchinfo), 198 (match (wip_match_opcode G_EXTRACT_VECTOR_ELT):$root, 199 [{ return matchExtractVecEltPairwiseAdd(*${root}, MRI, ${matchinfo}); }]), 200 (apply [{ applyExtractVecEltPairwiseAdd(*${root}, MRI, B, ${matchinfo}); }]) 201>; 202 203def mul_const_matchdata : GIDefMatchData<"std::function<void(MachineIRBuilder&, Register)>">; 204def mul_const : GICombineRule< 205 (defs root:$root, mul_const_matchdata:$matchinfo), 206 (match (wip_match_opcode G_MUL):$root, 207 [{ return matchAArch64MulConstCombine(*${root}, MRI, ${matchinfo}); }]), 208 (apply [{ applyAArch64MulConstCombine(*${root}, MRI, B, ${matchinfo}); }]) 209>; 210 211def lower_mull : GICombineRule< 212 (defs root:$root), 213 (match (wip_match_opcode G_MUL):$root, 214 [{ return matchExtMulToMULL(*${root}, MRI); }]), 215 (apply [{ applyExtMulToMULL(*${root}, MRI, B, Observer); }]) 216>; 217 218def build_vector_to_dup : GICombineRule< 219 (defs root:$root), 220 (match (wip_match_opcode G_BUILD_VECTOR):$root, 221 [{ return matchBuildVectorToDup(*${root}, MRI); }]), 222 (apply [{ applyBuildVectorToDup(*${root}, MRI, B); }]) 223>; 224 225def build_vector_lowering : GICombineGroup<[build_vector_to_dup]>; 226 227def lower_vector_fcmp : GICombineRule< 228 (defs root:$root), 229 (match (wip_match_opcode G_FCMP):$root, 230 [{ return matchLowerVectorFCMP(*${root}, MRI, B); }]), 231 (apply [{ applyLowerVectorFCMP(*${root}, MRI, B); }])>; 232 233def form_truncstore_matchdata : GIDefMatchData<"Register">; 234def form_truncstore : GICombineRule< 235 (defs root:$root, form_truncstore_matchdata:$matchinfo), 236 (match (wip_match_opcode G_STORE):$root, 237 [{ return matchFormTruncstore(*${root}, MRI, ${matchinfo}); }]), 238 (apply [{ applyFormTruncstore(*${root}, MRI, B, Observer, ${matchinfo}); }]) 239>; 240 241def fold_merge_to_zext : GICombineRule< 242 (defs root:$d), 243 (match (wip_match_opcode G_MERGE_VALUES):$d, 244 [{ return matchFoldMergeToZext(*${d}, MRI); }]), 245 (apply [{ applyFoldMergeToZext(*${d}, MRI, B, Observer); }]) 246>; 247 248def mutate_anyext_to_zext : GICombineRule< 249 (defs root:$d), 250 (match (wip_match_opcode G_ANYEXT):$d, 251 [{ return matchMutateAnyExtToZExt(*${d}, MRI); }]), 252 (apply [{ applyMutateAnyExtToZExt(*${d}, MRI, B, Observer); }]) 253>; 254 255def split_store_zero_128 : GICombineRule< 256 (defs root:$d), 257 (match (wip_match_opcode G_STORE):$d, 258 [{ return matchSplitStoreZero128(*${d}, MRI); }]), 259 (apply [{ applySplitStoreZero128(*${d}, MRI, B, Observer); }]) 260>; 261 262def vector_sext_inreg_to_shift : GICombineRule< 263 (defs root:$d), 264 (match (wip_match_opcode G_SEXT_INREG):$d, 265 [{ return matchVectorSextInReg(*${d}, MRI); }]), 266 (apply [{ applyVectorSextInReg(*${d}, MRI, B, Observer); }]) 267>; 268 269def unmerge_ext_to_unmerge_matchdata : GIDefMatchData<"Register">; 270def unmerge_ext_to_unmerge : GICombineRule< 271 (defs root:$d, unmerge_ext_to_unmerge_matchdata:$matchinfo), 272 (match (wip_match_opcode G_UNMERGE_VALUES):$d, 273 [{ return matchUnmergeExtToUnmerge(*${d}, MRI, ${matchinfo}); }]), 274 (apply [{ applyUnmergeExtToUnmerge(*${d}, MRI, B, Observer, ${matchinfo}); }]) 275>; 276 277def regtriple_matchdata : GIDefMatchData<"std::tuple<Register, Register, Register>">; 278def or_to_bsp: GICombineRule < 279 (defs root:$root, regtriple_matchdata:$matchinfo), 280 (match (wip_match_opcode G_OR):$root, 281 [{ return matchOrToBSP(*${root}, MRI, ${matchinfo}); }]), 282 (apply [{ applyOrToBSP(*${root}, MRI, B, ${matchinfo}); }]) 283>; 284 285// Combines Mul(And(Srl(X, 15), 0x10001), 0xffff) into CMLTz 286def combine_mul_cmlt : GICombineRule< 287 (defs root:$root, register_matchinfo:$matchinfo), 288 (match (wip_match_opcode G_MUL):$root, 289 [{ return matchCombineMulCMLT(*${root}, MRI, ${matchinfo}); }]), 290 (apply [{ applyCombineMulCMLT(*${root}, MRI, B, ${matchinfo}); }]) 291>; 292 293// Post-legalization combines which should happen at all optimization levels. 294// (E.g. ones that facilitate matching for the selector) For example, matching 295// pseudos. 296def AArch64PostLegalizerLowering 297 : GICombiner<"AArch64PostLegalizerLoweringImpl", 298 [shuffle_vector_lowering, vashr_vlshr_imm, 299 icmp_lowering, build_vector_lowering, 300 lower_vector_fcmp, form_truncstore, 301 vector_sext_inreg_to_shift, 302 unmerge_ext_to_unmerge, lower_mull, 303 vector_unmerge_lowering, insertelt_nonconst]> { 304} 305 306// Post-legalization combines which are primarily optimizations. 307def AArch64PostLegalizerCombiner 308 : GICombiner<"AArch64PostLegalizerCombinerImpl", 309 [copy_prop, combines_for_extload, 310 combine_indexed_load_store, 311 sext_trunc_sextload, mutate_anyext_to_zext, 312 hoist_logic_op_with_same_opcode_hands, 313 redundant_and, xor_of_and_with_same_reg, 314 extractvecelt_pairwise_add, redundant_or, 315 mul_const, redundant_sext_inreg, 316 form_bitfield_extract, rotate_out_of_range, 317 icmp_to_true_false_known_bits, merge_unmerge, 318 select_combines, fold_merge_to_zext, 319 constant_fold_binops, identity_combines, 320 ptr_add_immed_chain, overlapping_and, 321 split_store_zero_128, undef_combines, 322 select_to_minmax, or_to_bsp, combine_concat_vector, 323 commute_constant_to_rhs, 324 push_freeze_to_prevent_poison_from_propagating, 325 combine_mul_cmlt]> { 326} 327