forked from OSchip/llvm-project
372 lines
18 KiB
TableGen
372 lines
18 KiB
TableGen
// WebAssemblyInstrMemory.td-WebAssembly Memory codegen support -*- 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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/// \file
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/// WebAssembly Memory operand code-gen constructs.
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///
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//===----------------------------------------------------------------------===//
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// TODO:
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// - HasAddr64
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// - WebAssemblyTargetLowering having to do with atomics
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// - Each has optional alignment.
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// WebAssembly has i8/i16/i32/i64/f32/f64 memory types, but doesn't have i8/i16
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// local types. These memory-only types instead zero- or sign-extend into local
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// types when loading, and truncate when storing.
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// WebAssembly constant offsets are performed as unsigned with infinite
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// precision, so we need to check for NoUnsignedWrap so that we don't fold an
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// offset for an add that needs wrapping.
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def regPlusImm : PatFrag<(ops node:$addr, node:$off),
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(add node:$addr, node:$off),
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[{ return N->getFlags().hasNoUnsignedWrap(); }]>;
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// Treat an 'or' node as an 'add' if the or'ed bits are known to be zero.
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def or_is_add : PatFrag<(ops node:$lhs, node:$rhs), (or node:$lhs, node:$rhs),[{
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if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N->getOperand(1)))
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return CurDAG->MaskedValueIsZero(N->getOperand(0), CN->getAPIntValue());
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KnownBits Known0 = CurDAG->computeKnownBits(N->getOperand(0), 0);
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KnownBits Known1 = CurDAG->computeKnownBits(N->getOperand(1), 0);
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return (~Known0.Zero & ~Known1.Zero) == 0;
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}]>;
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// GlobalAddresses are conceptually unsigned values, so we can also fold them
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// into immediate values as long as the add is 'nuw'.
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// TODO: We'd like to also match GA offsets but there are cases where the
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// register can have a negative value. Find out what more we can do.
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def regPlusGA : PatFrag<(ops node:$addr, node:$off),
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(add node:$addr, node:$off),
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[{
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return N->getFlags().hasNoUnsignedWrap();
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}]>;
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// We don't need a regPlusES because external symbols never have constant
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// offsets folded into them, so we can just use add.
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// Defines atomic and non-atomic loads, regular and extending.
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multiclass WebAssemblyLoad<WebAssemblyRegClass rc, string Name, int Opcode> {
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let mayLoad = 1, UseNamedOperandTable = 1 in
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defm "": I<(outs rc:$dst),
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(ins P2Align:$p2align, offset32_op:$off, I32:$addr),
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(outs), (ins P2Align:$p2align, offset32_op:$off),
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[], !strconcat(Name, "\t$dst, ${off}(${addr})${p2align}"),
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!strconcat(Name, "\t${off}${p2align}"), Opcode>;
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}
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// Basic load.
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// FIXME: When we can break syntax compatibility, reorder the fields in the
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// asmstrings to match the binary encoding.
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defm LOAD_I32 : WebAssemblyLoad<I32, "i32.load", 0x28>;
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defm LOAD_I64 : WebAssemblyLoad<I64, "i64.load", 0x29>;
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defm LOAD_F32 : WebAssemblyLoad<F32, "f32.load", 0x2a>;
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defm LOAD_F64 : WebAssemblyLoad<F64, "f64.load", 0x2b>;
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// Select loads with no constant offset.
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class LoadPatNoOffset<ValueType ty, PatFrag kind, NI inst> :
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Pat<(ty (kind I32:$addr)), (inst 0, 0, I32:$addr)>;
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def : LoadPatNoOffset<i32, load, LOAD_I32>;
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def : LoadPatNoOffset<i64, load, LOAD_I64>;
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def : LoadPatNoOffset<f32, load, LOAD_F32>;
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def : LoadPatNoOffset<f64, load, LOAD_F64>;
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// Select loads with a constant offset.
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// Pattern with address + immediate offset
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class LoadPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
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Pat<(ty (kind (operand I32:$addr, imm:$off))), (inst 0, imm:$off, I32:$addr)>;
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def : LoadPatImmOff<i32, load, regPlusImm, LOAD_I32>;
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def : LoadPatImmOff<i64, load, regPlusImm, LOAD_I64>;
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def : LoadPatImmOff<f32, load, regPlusImm, LOAD_F32>;
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def : LoadPatImmOff<f64, load, regPlusImm, LOAD_F64>;
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def : LoadPatImmOff<i32, load, or_is_add, LOAD_I32>;
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def : LoadPatImmOff<i64, load, or_is_add, LOAD_I64>;
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def : LoadPatImmOff<f32, load, or_is_add, LOAD_F32>;
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def : LoadPatImmOff<f64, load, or_is_add, LOAD_F64>;
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class LoadPatGlobalAddr<ValueType ty, PatFrag kind, NI inst> :
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Pat<(ty (kind (regPlusGA I32:$addr, (WebAssemblywrapper tglobaladdr:$off)))),
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(inst 0, tglobaladdr:$off, I32:$addr)>, Requires<[IsNotPIC]>;
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def : LoadPatGlobalAddr<i32, load, LOAD_I32>;
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def : LoadPatGlobalAddr<i64, load, LOAD_I64>;
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def : LoadPatGlobalAddr<f32, load, LOAD_F32>;
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def : LoadPatGlobalAddr<f64, load, LOAD_F64>;
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// Select loads with just a constant offset.
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class LoadPatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
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Pat<(ty (kind imm:$off)), (inst 0, imm:$off, (CONST_I32 0))>;
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def : LoadPatOffsetOnly<i32, load, LOAD_I32>;
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def : LoadPatOffsetOnly<i64, load, LOAD_I64>;
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def : LoadPatOffsetOnly<f32, load, LOAD_F32>;
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def : LoadPatOffsetOnly<f64, load, LOAD_F64>;
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class LoadPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
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Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off))),
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(inst 0, tglobaladdr:$off, (CONST_I32 0))>, Requires<[IsNotPIC]>;
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def : LoadPatGlobalAddrOffOnly<i32, load, LOAD_I32>;
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def : LoadPatGlobalAddrOffOnly<i64, load, LOAD_I64>;
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def : LoadPatGlobalAddrOffOnly<f32, load, LOAD_F32>;
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def : LoadPatGlobalAddrOffOnly<f64, load, LOAD_F64>;
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// Extending load.
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defm LOAD8_S_I32 : WebAssemblyLoad<I32, "i32.load8_s", 0x2c>;
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defm LOAD8_U_I32 : WebAssemblyLoad<I32, "i32.load8_u", 0x2d>;
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defm LOAD16_S_I32 : WebAssemblyLoad<I32, "i32.load16_s", 0x2e>;
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defm LOAD16_U_I32 : WebAssemblyLoad<I32, "i32.load16_u", 0x2f>;
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defm LOAD8_S_I64 : WebAssemblyLoad<I64, "i64.load8_s", 0x30>;
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defm LOAD8_U_I64 : WebAssemblyLoad<I64, "i64.load8_u", 0x31>;
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defm LOAD16_S_I64 : WebAssemblyLoad<I64, "i64.load16_s", 0x32>;
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defm LOAD16_U_I64 : WebAssemblyLoad<I64, "i64.load16_u", 0x33>;
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defm LOAD32_S_I64 : WebAssemblyLoad<I64, "i64.load32_s", 0x34>;
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defm LOAD32_U_I64 : WebAssemblyLoad<I64, "i64.load32_u", 0x35>;
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// Select extending loads with no constant offset.
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def : LoadPatNoOffset<i32, sextloadi8, LOAD8_S_I32>;
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def : LoadPatNoOffset<i32, zextloadi8, LOAD8_U_I32>;
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def : LoadPatNoOffset<i32, sextloadi16, LOAD16_S_I32>;
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def : LoadPatNoOffset<i32, zextloadi16, LOAD16_U_I32>;
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def : LoadPatNoOffset<i64, sextloadi8, LOAD8_S_I64>;
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def : LoadPatNoOffset<i64, zextloadi8, LOAD8_U_I64>;
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def : LoadPatNoOffset<i64, sextloadi16, LOAD16_S_I64>;
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def : LoadPatNoOffset<i64, zextloadi16, LOAD16_U_I64>;
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def : LoadPatNoOffset<i64, sextloadi32, LOAD32_S_I64>;
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def : LoadPatNoOffset<i64, zextloadi32, LOAD32_U_I64>;
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// Select extending loads with a constant offset.
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def : LoadPatImmOff<i32, sextloadi8, regPlusImm, LOAD8_S_I32>;
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def : LoadPatImmOff<i32, zextloadi8, regPlusImm, LOAD8_U_I32>;
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def : LoadPatImmOff<i32, sextloadi16, regPlusImm, LOAD16_S_I32>;
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def : LoadPatImmOff<i32, zextloadi16, regPlusImm, LOAD16_U_I32>;
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def : LoadPatImmOff<i64, sextloadi8, regPlusImm, LOAD8_S_I64>;
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def : LoadPatImmOff<i64, zextloadi8, regPlusImm, LOAD8_U_I64>;
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def : LoadPatImmOff<i64, sextloadi16, regPlusImm, LOAD16_S_I64>;
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def : LoadPatImmOff<i64, zextloadi16, regPlusImm, LOAD16_U_I64>;
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def : LoadPatImmOff<i64, sextloadi32, regPlusImm, LOAD32_S_I64>;
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def : LoadPatImmOff<i64, zextloadi32, regPlusImm, LOAD32_U_I64>;
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def : LoadPatImmOff<i32, sextloadi8, or_is_add, LOAD8_S_I32>;
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def : LoadPatImmOff<i32, zextloadi8, or_is_add, LOAD8_U_I32>;
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def : LoadPatImmOff<i32, sextloadi16, or_is_add, LOAD16_S_I32>;
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def : LoadPatImmOff<i32, zextloadi16, or_is_add, LOAD16_U_I32>;
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def : LoadPatImmOff<i64, sextloadi8, or_is_add, LOAD8_S_I64>;
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def : LoadPatImmOff<i64, zextloadi8, or_is_add, LOAD8_U_I64>;
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def : LoadPatImmOff<i64, sextloadi16, or_is_add, LOAD16_S_I64>;
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def : LoadPatImmOff<i64, zextloadi16, or_is_add, LOAD16_U_I64>;
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def : LoadPatImmOff<i64, sextloadi32, or_is_add, LOAD32_S_I64>;
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def : LoadPatImmOff<i64, zextloadi32, or_is_add, LOAD32_U_I64>;
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def : LoadPatGlobalAddr<i32, sextloadi8, LOAD8_S_I32>;
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def : LoadPatGlobalAddr<i32, zextloadi8, LOAD8_U_I32>;
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def : LoadPatGlobalAddr<i32, sextloadi16, LOAD16_S_I32>;
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def : LoadPatGlobalAddr<i32, zextloadi8, LOAD16_U_I32>;
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def : LoadPatGlobalAddr<i64, sextloadi8, LOAD8_S_I64>;
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def : LoadPatGlobalAddr<i64, zextloadi8, LOAD8_U_I64>;
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def : LoadPatGlobalAddr<i64, sextloadi16, LOAD16_S_I64>;
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def : LoadPatGlobalAddr<i64, zextloadi16, LOAD16_U_I64>;
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def : LoadPatGlobalAddr<i64, sextloadi32, LOAD32_S_I64>;
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def : LoadPatGlobalAddr<i64, zextloadi32, LOAD32_U_I64>;
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// Select extending loads with just a constant offset.
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def : LoadPatOffsetOnly<i32, sextloadi8, LOAD8_S_I32>;
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def : LoadPatOffsetOnly<i32, zextloadi8, LOAD8_U_I32>;
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def : LoadPatOffsetOnly<i32, sextloadi16, LOAD16_S_I32>;
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def : LoadPatOffsetOnly<i32, zextloadi16, LOAD16_U_I32>;
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def : LoadPatOffsetOnly<i64, sextloadi8, LOAD8_S_I64>;
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def : LoadPatOffsetOnly<i64, zextloadi8, LOAD8_U_I64>;
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def : LoadPatOffsetOnly<i64, sextloadi16, LOAD16_S_I64>;
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def : LoadPatOffsetOnly<i64, zextloadi16, LOAD16_U_I64>;
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def : LoadPatOffsetOnly<i64, sextloadi32, LOAD32_S_I64>;
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def : LoadPatOffsetOnly<i64, zextloadi32, LOAD32_U_I64>;
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def : LoadPatGlobalAddrOffOnly<i32, sextloadi8, LOAD8_S_I32>;
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def : LoadPatGlobalAddrOffOnly<i32, zextloadi8, LOAD8_U_I32>;
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def : LoadPatGlobalAddrOffOnly<i32, sextloadi16, LOAD16_S_I32>;
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def : LoadPatGlobalAddrOffOnly<i32, zextloadi16, LOAD16_U_I32>;
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def : LoadPatGlobalAddrOffOnly<i64, sextloadi8, LOAD8_S_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, zextloadi8, LOAD8_U_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, sextloadi16, LOAD16_S_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, zextloadi16, LOAD16_U_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, sextloadi32, LOAD32_S_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, zextloadi32, LOAD32_U_I64>;
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// Resolve "don't care" extending loads to zero-extending loads. This is
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// somewhat arbitrary, but zero-extending is conceptually simpler.
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// Select "don't care" extending loads with no constant offset.
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def : LoadPatNoOffset<i32, extloadi8, LOAD8_U_I32>;
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def : LoadPatNoOffset<i32, extloadi16, LOAD16_U_I32>;
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def : LoadPatNoOffset<i64, extloadi8, LOAD8_U_I64>;
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def : LoadPatNoOffset<i64, extloadi16, LOAD16_U_I64>;
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def : LoadPatNoOffset<i64, extloadi32, LOAD32_U_I64>;
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// Select "don't care" extending loads with a constant offset.
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def : LoadPatImmOff<i32, extloadi8, regPlusImm, LOAD8_U_I32>;
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def : LoadPatImmOff<i32, extloadi16, regPlusImm, LOAD16_U_I32>;
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def : LoadPatImmOff<i64, extloadi8, regPlusImm, LOAD8_U_I64>;
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def : LoadPatImmOff<i64, extloadi16, regPlusImm, LOAD16_U_I64>;
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def : LoadPatImmOff<i64, extloadi32, regPlusImm, LOAD32_U_I64>;
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def : LoadPatImmOff<i32, extloadi8, or_is_add, LOAD8_U_I32>;
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def : LoadPatImmOff<i32, extloadi16, or_is_add, LOAD16_U_I32>;
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def : LoadPatImmOff<i64, extloadi8, or_is_add, LOAD8_U_I64>;
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def : LoadPatImmOff<i64, extloadi16, or_is_add, LOAD16_U_I64>;
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def : LoadPatImmOff<i64, extloadi32, or_is_add, LOAD32_U_I64>;
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def : LoadPatGlobalAddr<i32, extloadi8, LOAD8_U_I32>;
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def : LoadPatGlobalAddr<i32, extloadi16, LOAD16_U_I32>;
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def : LoadPatGlobalAddr<i64, extloadi8, LOAD8_U_I64>;
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def : LoadPatGlobalAddr<i64, extloadi16, LOAD16_U_I64>;
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def : LoadPatGlobalAddr<i64, extloadi32, LOAD32_U_I64>;
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// Select "don't care" extending loads with just a constant offset.
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def : LoadPatOffsetOnly<i32, extloadi8, LOAD8_U_I32>;
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def : LoadPatOffsetOnly<i32, extloadi16, LOAD16_U_I32>;
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def : LoadPatOffsetOnly<i64, extloadi8, LOAD8_U_I64>;
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def : LoadPatOffsetOnly<i64, extloadi16, LOAD16_U_I64>;
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def : LoadPatOffsetOnly<i64, extloadi32, LOAD32_U_I64>;
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def : LoadPatGlobalAddrOffOnly<i32, extloadi8, LOAD8_U_I32>;
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def : LoadPatGlobalAddrOffOnly<i32, extloadi16, LOAD16_U_I32>;
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def : LoadPatGlobalAddrOffOnly<i64, extloadi8, LOAD8_U_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, extloadi16, LOAD16_U_I64>;
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def : LoadPatGlobalAddrOffOnly<i64, extloadi32, LOAD32_U_I64>;
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// Defines atomic and non-atomic stores, regular and truncating
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multiclass WebAssemblyStore<WebAssemblyRegClass rc, string Name, int Opcode> {
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let mayStore = 1, UseNamedOperandTable = 1 in
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defm "" : I<(outs),
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(ins P2Align:$p2align, offset32_op:$off, I32:$addr, rc:$val),
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(outs),
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(ins P2Align:$p2align, offset32_op:$off), [],
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!strconcat(Name, "\t${off}(${addr})${p2align}, $val"),
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!strconcat(Name, "\t${off}${p2align}"), Opcode>;
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}
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// Basic store.
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// Note: WebAssembly inverts SelectionDAG's usual operand order.
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defm STORE_I32 : WebAssemblyStore<I32, "i32.store", 0x36>;
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defm STORE_I64 : WebAssemblyStore<I64, "i64.store", 0x37>;
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defm STORE_F32 : WebAssemblyStore<F32, "f32.store", 0x38>;
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defm STORE_F64 : WebAssemblyStore<F64, "f64.store", 0x39>;
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// Select stores with no constant offset.
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class StorePatNoOffset<ValueType ty, PatFrag node, NI inst> :
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Pat<(node ty:$val, I32:$addr), (inst 0, 0, I32:$addr, ty:$val)>;
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def : StorePatNoOffset<i32, store, STORE_I32>;
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def : StorePatNoOffset<i64, store, STORE_I64>;
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def : StorePatNoOffset<f32, store, STORE_F32>;
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def : StorePatNoOffset<f64, store, STORE_F64>;
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// Select stores with a constant offset.
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class StorePatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
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Pat<(kind ty:$val, (operand I32:$addr, imm:$off)),
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(inst 0, imm:$off, I32:$addr, ty:$val)>;
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def : StorePatImmOff<i32, store, regPlusImm, STORE_I32>;
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def : StorePatImmOff<i64, store, regPlusImm, STORE_I64>;
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def : StorePatImmOff<f32, store, regPlusImm, STORE_F32>;
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def : StorePatImmOff<f64, store, regPlusImm, STORE_F64>;
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def : StorePatImmOff<i32, store, or_is_add, STORE_I32>;
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def : StorePatImmOff<i64, store, or_is_add, STORE_I64>;
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def : StorePatImmOff<f32, store, or_is_add, STORE_F32>;
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def : StorePatImmOff<f64, store, or_is_add, STORE_F64>;
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class StorePatGlobalAddr<ValueType ty, PatFrag kind, NI inst> :
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Pat<(kind ty:$val,
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(regPlusGA I32:$addr, (WebAssemblywrapper tglobaladdr:$off))),
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(inst 0, tglobaladdr:$off, I32:$addr, ty:$val)>, Requires<[IsNotPIC]>;
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def : StorePatGlobalAddr<i32, store, STORE_I32>;
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def : StorePatGlobalAddr<i64, store, STORE_I64>;
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def : StorePatGlobalAddr<f32, store, STORE_F32>;
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def : StorePatGlobalAddr<f64, store, STORE_F64>;
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// Select stores with just a constant offset.
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class StorePatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
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Pat<(kind ty:$val, imm:$off), (inst 0, imm:$off, (CONST_I32 0), ty:$val)>;
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def : StorePatOffsetOnly<i32, store, STORE_I32>;
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def : StorePatOffsetOnly<i64, store, STORE_I64>;
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def : StorePatOffsetOnly<f32, store, STORE_F32>;
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def : StorePatOffsetOnly<f64, store, STORE_F64>;
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class StorePatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
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Pat<(kind ty:$val, (WebAssemblywrapper tglobaladdr:$off)),
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(inst 0, tglobaladdr:$off, (CONST_I32 0), ty:$val)>, Requires<[IsNotPIC]>;
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def : StorePatGlobalAddrOffOnly<i32, store, STORE_I32>;
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def : StorePatGlobalAddrOffOnly<i64, store, STORE_I64>;
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def : StorePatGlobalAddrOffOnly<f32, store, STORE_F32>;
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def : StorePatGlobalAddrOffOnly<f64, store, STORE_F64>;
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// Truncating store.
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defm STORE8_I32 : WebAssemblyStore<I32, "i32.store8", 0x3a>;
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defm STORE16_I32 : WebAssemblyStore<I32, "i32.store16", 0x3b>;
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defm STORE8_I64 : WebAssemblyStore<I64, "i64.store8", 0x3c>;
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defm STORE16_I64 : WebAssemblyStore<I64, "i64.store16", 0x3d>;
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defm STORE32_I64 : WebAssemblyStore<I64, "i64.store32", 0x3e>;
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// Select truncating stores with no constant offset.
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def : StorePatNoOffset<i32, truncstorei8, STORE8_I32>;
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def : StorePatNoOffset<i32, truncstorei16, STORE16_I32>;
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def : StorePatNoOffset<i64, truncstorei8, STORE8_I64>;
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def : StorePatNoOffset<i64, truncstorei16, STORE16_I64>;
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def : StorePatNoOffset<i64, truncstorei32, STORE32_I64>;
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// Select truncating stores with a constant offset.
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def : StorePatImmOff<i32, truncstorei8, regPlusImm, STORE8_I32>;
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def : StorePatImmOff<i32, truncstorei16, regPlusImm, STORE16_I32>;
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def : StorePatImmOff<i64, truncstorei8, regPlusImm, STORE8_I64>;
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def : StorePatImmOff<i64, truncstorei16, regPlusImm, STORE16_I64>;
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def : StorePatImmOff<i64, truncstorei32, regPlusImm, STORE32_I64>;
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def : StorePatImmOff<i32, truncstorei8, or_is_add, STORE8_I32>;
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def : StorePatImmOff<i32, truncstorei16, or_is_add, STORE16_I32>;
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def : StorePatImmOff<i64, truncstorei8, or_is_add, STORE8_I64>;
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def : StorePatImmOff<i64, truncstorei16, or_is_add, STORE16_I64>;
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def : StorePatImmOff<i64, truncstorei32, or_is_add, STORE32_I64>;
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def : StorePatGlobalAddr<i32, truncstorei8, STORE8_I32>;
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def : StorePatGlobalAddr<i32, truncstorei16, STORE16_I32>;
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def : StorePatGlobalAddr<i64, truncstorei8, STORE8_I64>;
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def : StorePatGlobalAddr<i64, truncstorei16, STORE16_I64>;
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def : StorePatGlobalAddr<i64, truncstorei32, STORE32_I64>;
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// Select truncating stores with just a constant offset.
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def : StorePatOffsetOnly<i32, truncstorei8, STORE8_I32>;
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def : StorePatOffsetOnly<i32, truncstorei16, STORE16_I32>;
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def : StorePatOffsetOnly<i64, truncstorei8, STORE8_I64>;
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def : StorePatOffsetOnly<i64, truncstorei16, STORE16_I64>;
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def : StorePatOffsetOnly<i64, truncstorei32, STORE32_I64>;
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def : StorePatGlobalAddrOffOnly<i32, truncstorei8, STORE8_I32>;
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def : StorePatGlobalAddrOffOnly<i32, truncstorei16, STORE16_I32>;
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def : StorePatGlobalAddrOffOnly<i64, truncstorei8, STORE8_I64>;
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def : StorePatGlobalAddrOffOnly<i64, truncstorei16, STORE16_I64>;
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def : StorePatGlobalAddrOffOnly<i64, truncstorei32, STORE32_I64>;
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// Current memory size.
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defm MEMORY_SIZE_I32 : I<(outs I32:$dst), (ins i32imm:$flags),
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(outs), (ins i32imm:$flags),
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[(set I32:$dst,
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(int_wasm_memory_size (i32 imm:$flags)))],
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"memory.size\t$dst, $flags", "memory.size\t$flags",
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0x3f>,
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Requires<[HasAddr32]>;
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// Grow memory.
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defm MEMORY_GROW_I32 : I<(outs I32:$dst), (ins i32imm:$flags, I32:$delta),
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(outs), (ins i32imm:$flags),
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[(set I32:$dst,
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(int_wasm_memory_grow (i32 imm:$flags),
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I32:$delta))],
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"memory.grow\t$dst, $flags, $delta",
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"memory.grow\t$flags", 0x40>,
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Requires<[HasAddr32]>;
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