217 lines
8.8 KiB
TableGen
217 lines
8.8 KiB
TableGen
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//===- TargetGlobalISel.td - Common code for GlobalISel ----*- tablegen -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the target-independent interfaces used to support
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// SelectionDAG instruction selection patterns (specified in
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// TargetSelectionDAG.td) when generating GlobalISel instruction selectors.
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//
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// This is intended as a compatibility layer, to enable reuse of target
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// descriptions written for SelectionDAG without requiring explicit GlobalISel
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// support. It will eventually supersede SelectionDAG patterns.
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//
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//===----------------------------------------------------------------------===//
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// Declare that a generic Instruction is 'equivalent' to an SDNode, that is,
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// SelectionDAG patterns involving the SDNode can be transformed to match the
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// Instruction instead.
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class GINodeEquiv<Instruction i, SDNode node> {
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Instruction I = i;
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SDNode Node = node;
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// SelectionDAG has separate nodes for atomic and non-atomic memory operations
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// (ISD::LOAD, ISD::ATOMIC_LOAD, ISD::STORE, ISD::ATOMIC_STORE) but GlobalISel
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// stores this information in the MachineMemoryOperand.
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bit CheckMMOIsNonAtomic = false;
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bit CheckMMOIsAtomic = false;
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// SelectionDAG has one node for all loads and uses predicates to
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// differentiate them. GlobalISel on the other hand uses separate opcodes.
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// When this is true, the resulting opcode is G_LOAD/G_SEXTLOAD/G_ZEXTLOAD
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// depending on the predicates on the node.
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Instruction IfSignExtend = ?;
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Instruction IfZeroExtend = ?;
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// SelectionDAG has one setcc for all compares. This differentiates
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// for G_ICMP and G_FCMP.
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Instruction IfFloatingPoint = ?;
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}
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// These are defined in the same order as the G_* instructions.
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def : GINodeEquiv<G_ANYEXT, anyext>;
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def : GINodeEquiv<G_SEXT, sext>;
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def : GINodeEquiv<G_ZEXT, zext>;
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def : GINodeEquiv<G_TRUNC, trunc>;
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def : GINodeEquiv<G_BITCAST, bitconvert>;
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// G_INTTOPTR - SelectionDAG has no equivalent.
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// G_PTRTOINT - SelectionDAG has no equivalent.
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def : GINodeEquiv<G_CONSTANT, imm>;
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def : GINodeEquiv<G_FCONSTANT, fpimm>;
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def : GINodeEquiv<G_IMPLICIT_DEF, undef>;
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def : GINodeEquiv<G_FRAME_INDEX, frameindex>;
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def : GINodeEquiv<G_BLOCK_ADDR, blockaddress>;
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def : GINodeEquiv<G_ADD, add>;
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def : GINodeEquiv<G_SUB, sub>;
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def : GINodeEquiv<G_MUL, mul>;
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def : GINodeEquiv<G_UMULH, mulhu>;
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def : GINodeEquiv<G_SMULH, mulhs>;
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def : GINodeEquiv<G_SDIV, sdiv>;
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def : GINodeEquiv<G_UDIV, udiv>;
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def : GINodeEquiv<G_SREM, srem>;
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def : GINodeEquiv<G_UREM, urem>;
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def : GINodeEquiv<G_AND, and>;
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def : GINodeEquiv<G_OR, or>;
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def : GINodeEquiv<G_XOR, xor>;
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def : GINodeEquiv<G_SHL, shl>;
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def : GINodeEquiv<G_LSHR, srl>;
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def : GINodeEquiv<G_ASHR, sra>;
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def : GINodeEquiv<G_SADDSAT, saddsat>;
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def : GINodeEquiv<G_UADDSAT, uaddsat>;
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def : GINodeEquiv<G_SSUBSAT, ssubsat>;
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def : GINodeEquiv<G_USUBSAT, usubsat>;
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def : GINodeEquiv<G_SSHLSAT, sshlsat>;
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def : GINodeEquiv<G_USHLSAT, ushlsat>;
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def : GINodeEquiv<G_SMULFIX, smulfix>;
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def : GINodeEquiv<G_UMULFIX, umulfix>;
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def : GINodeEquiv<G_SMULFIXSAT, smulfixsat>;
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def : GINodeEquiv<G_UMULFIXSAT, umulfixsat>;
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def : GINodeEquiv<G_SDIVFIX, sdivfix>;
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def : GINodeEquiv<G_UDIVFIX, udivfix>;
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def : GINodeEquiv<G_SDIVFIXSAT, sdivfixsat>;
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def : GINodeEquiv<G_UDIVFIXSAT, udivfixsat>;
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def : GINodeEquiv<G_SELECT, select>;
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def : GINodeEquiv<G_FNEG, fneg>;
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def : GINodeEquiv<G_FPEXT, fpextend>;
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def : GINodeEquiv<G_FPTRUNC, fpround>;
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def : GINodeEquiv<G_FPTOSI, fp_to_sint>;
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def : GINodeEquiv<G_FPTOUI, fp_to_uint>;
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def : GINodeEquiv<G_SITOFP, sint_to_fp>;
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def : GINodeEquiv<G_UITOFP, uint_to_fp>;
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def : GINodeEquiv<G_FADD, fadd>;
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def : GINodeEquiv<G_FSUB, fsub>;
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def : GINodeEquiv<G_FMA, fma>;
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def : GINodeEquiv<G_FMAD, fmad>;
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def : GINodeEquiv<G_FMUL, fmul>;
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def : GINodeEquiv<G_FDIV, fdiv>;
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def : GINodeEquiv<G_FREM, frem>;
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def : GINodeEquiv<G_FPOW, fpow>;
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def : GINodeEquiv<G_FEXP2, fexp2>;
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def : GINodeEquiv<G_FLOG2, flog2>;
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def : GINodeEquiv<G_FCANONICALIZE, fcanonicalize>;
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def : GINodeEquiv<G_INTRINSIC, intrinsic_wo_chain>;
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// ISD::INTRINSIC_VOID can also be handled with G_INTRINSIC_W_SIDE_EFFECTS.
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def : GINodeEquiv<G_INTRINSIC_W_SIDE_EFFECTS, intrinsic_void>;
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def : GINodeEquiv<G_INTRINSIC_W_SIDE_EFFECTS, intrinsic_w_chain>;
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def : GINodeEquiv<G_BR, br>;
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def : GINodeEquiv<G_BSWAP, bswap>;
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def : GINodeEquiv<G_BITREVERSE, bitreverse>;
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def : GINodeEquiv<G_FSHL, fshl>;
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def : GINodeEquiv<G_FSHR, fshr>;
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def : GINodeEquiv<G_CTLZ, ctlz>;
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def : GINodeEquiv<G_CTTZ, cttz>;
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def : GINodeEquiv<G_CTLZ_ZERO_UNDEF, ctlz_zero_undef>;
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def : GINodeEquiv<G_CTTZ_ZERO_UNDEF, cttz_zero_undef>;
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def : GINodeEquiv<G_CTPOP, ctpop>;
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def : GINodeEquiv<G_EXTRACT_VECTOR_ELT, extractelt>;
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def : GINodeEquiv<G_CONCAT_VECTORS, concat_vectors>;
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def : GINodeEquiv<G_BUILD_VECTOR, build_vector>;
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def : GINodeEquiv<G_FCEIL, fceil>;
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def : GINodeEquiv<G_FCOS, fcos>;
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def : GINodeEquiv<G_FSIN, fsin>;
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def : GINodeEquiv<G_FABS, fabs>;
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def : GINodeEquiv<G_FSQRT, fsqrt>;
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def : GINodeEquiv<G_FFLOOR, ffloor>;
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def : GINodeEquiv<G_FRINT, frint>;
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def : GINodeEquiv<G_FNEARBYINT, fnearbyint>;
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def : GINodeEquiv<G_INTRINSIC_TRUNC, ftrunc>;
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def : GINodeEquiv<G_INTRINSIC_ROUND, fround>;
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def : GINodeEquiv<G_INTRINSIC_LRINT, lrint>;
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def : GINodeEquiv<G_FCOPYSIGN, fcopysign>;
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def : GINodeEquiv<G_SMIN, smin>;
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def : GINodeEquiv<G_SMAX, smax>;
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def : GINodeEquiv<G_UMIN, umin>;
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def : GINodeEquiv<G_UMAX, umax>;
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def : GINodeEquiv<G_ABS, abs>;
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def : GINodeEquiv<G_FMINNUM, fminnum>;
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def : GINodeEquiv<G_FMAXNUM, fmaxnum>;
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def : GINodeEquiv<G_FMINNUM_IEEE, fminnum_ieee>;
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def : GINodeEquiv<G_FMAXNUM_IEEE, fmaxnum_ieee>;
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def : GINodeEquiv<G_READCYCLECOUNTER, readcyclecounter>;
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def : GINodeEquiv<G_STRICT_FADD, strict_fadd>;
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def : GINodeEquiv<G_STRICT_FSUB, strict_fsub>;
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def : GINodeEquiv<G_STRICT_FMUL, strict_fmul>;
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def : GINodeEquiv<G_STRICT_FDIV, strict_fdiv>;
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def : GINodeEquiv<G_STRICT_FREM, strict_frem>;
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def : GINodeEquiv<G_STRICT_FMA, strict_fma>;
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def : GINodeEquiv<G_STRICT_FSQRT, strict_fsqrt>;
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// Broadly speaking G_LOAD is equivalent to ISD::LOAD but there are some
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// complications that tablegen must take care of. For example, Predicates such
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// as isSignExtLoad require that this is not a perfect 1:1 mapping since a
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// sign-extending load is (G_SEXTLOAD x) in GlobalISel. Additionally,
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// G_LOAD handles both atomic and non-atomic loads where as SelectionDAG had
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// separate nodes for them. This GINodeEquiv maps the non-atomic loads to
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// G_LOAD with a non-atomic MachineMemOperand.
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def : GINodeEquiv<G_LOAD, ld> {
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let CheckMMOIsNonAtomic = true;
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let IfSignExtend = G_SEXTLOAD;
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let IfZeroExtend = G_ZEXTLOAD;
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}
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def : GINodeEquiv<G_ICMP, setcc> {
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let IfFloatingPoint = G_FCMP;
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}
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// Broadly speaking G_STORE is equivalent to ISD::STORE but there are some
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// complications that tablegen must take care of. For example, predicates such
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// as isTruncStore require that this is not a perfect 1:1 mapping since a
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// truncating store is (G_STORE (G_TRUNCATE x)) in GlobalISel. Additionally,
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// G_STORE handles both atomic and non-atomic stores where as SelectionDAG had
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// separate nodes for them. This GINodeEquiv maps the non-atomic stores to
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// G_STORE with a non-atomic MachineMemOperand.
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def : GINodeEquiv<G_STORE, st> { let CheckMMOIsNonAtomic = true; }
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def : GINodeEquiv<G_LOAD, atomic_load> {
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let CheckMMOIsNonAtomic = false;
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let CheckMMOIsAtomic = true;
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}
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// Operands are swapped for atomic_store vs. regular store
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def : GINodeEquiv<G_STORE, atomic_store> {
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let CheckMMOIsNonAtomic = false;
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let CheckMMOIsAtomic = true;
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}
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def : GINodeEquiv<G_ATOMIC_CMPXCHG, atomic_cmp_swap>;
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def : GINodeEquiv<G_ATOMICRMW_XCHG, atomic_swap>;
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def : GINodeEquiv<G_ATOMICRMW_ADD, atomic_load_add>;
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def : GINodeEquiv<G_ATOMICRMW_SUB, atomic_load_sub>;
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def : GINodeEquiv<G_ATOMICRMW_AND, atomic_load_and>;
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def : GINodeEquiv<G_ATOMICRMW_NAND, atomic_load_nand>;
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def : GINodeEquiv<G_ATOMICRMW_OR, atomic_load_or>;
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def : GINodeEquiv<G_ATOMICRMW_XOR, atomic_load_xor>;
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def : GINodeEquiv<G_ATOMICRMW_MIN, atomic_load_min>;
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def : GINodeEquiv<G_ATOMICRMW_MAX, atomic_load_max>;
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def : GINodeEquiv<G_ATOMICRMW_UMIN, atomic_load_umin>;
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def : GINodeEquiv<G_ATOMICRMW_UMAX, atomic_load_umax>;
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def : GINodeEquiv<G_ATOMICRMW_FADD, atomic_load_fadd>;
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def : GINodeEquiv<G_ATOMICRMW_FSUB, atomic_load_fsub>;
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def : GINodeEquiv<G_FENCE, atomic_fence>;
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// Specifies the GlobalISel equivalents for SelectionDAG's ComplexPattern.
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// Should be used on defs that subclass GIComplexOperandMatcher<>.
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class GIComplexPatternEquiv<ComplexPattern seldag> {
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ComplexPattern SelDAGEquivalent = seldag;
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}
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// Specifies the GlobalISel equivalents for SelectionDAG's SDNodeXForm.
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// Should be used on defs that subclass GICustomOperandRenderer<>.
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class GISDNodeXFormEquiv<SDNodeXForm seldag> {
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SDNodeXForm SelDAGEquivalent = seldag;
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}
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