15b03687ff
Tests if the runtime type of the function pointer matches the static type. If this returns false, calling the function pointer will trap. Uses `@llvm.wasm.ref.test.func` added in #147486. Also adds a "gc" wasm feature to gate the use of the ref.test instruction.
54 lines
2.4 KiB
TableGen
54 lines
2.4 KiB
TableGen
// WebAssemblyInstrRef.td - WebAssembly reference type codegen --*- 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 reference type operand codegen constructs.
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///
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//===----------------------------------------------------------------------===//
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multiclass REF_I<WebAssemblyRegClass rc, ValueType vt, string ht> {
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defm REF_NULL_#rc : I<(outs rc:$dst), (ins),
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(outs), (ins),
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[(set rc:$dst, (!cast<Intrinsic>("int_wasm_ref_null_" # ht)))],
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"ref.null_" # ht # "$dst",
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"ref.null_" # ht,
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!cond(!eq(ht, "func") : 0xd070,
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!eq(ht, "extern") : 0xd06f,
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!eq(ht, "exn") : 0xd069)>,
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Requires<[HasReferenceTypes]>;
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defm SELECT_#rc: I<(outs rc:$dst), (ins rc:$lhs, rc:$rhs, I32:$cond),
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(outs), (ins),
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[(set rc:$dst,
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(select I32:$cond, rc:$lhs, rc:$rhs))],
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vt#".select\t$dst, $lhs, $rhs, $cond",
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vt#".select", 0x1b>,
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Requires<[HasReferenceTypes]>;
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defm REF_IS_NULL_#rc
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: I<(outs I32:$dst), (ins rc:$ref), (outs), (ins),
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[(set I32:$dst, (!cast<Intrinsic>("int_wasm_ref_is_null_" # ht) rc:$ref))],
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"ref.is_null\t$ref",
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"ref.is_null", 0xd1>,
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Requires<[HasReferenceTypes]>;
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}
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defm REF_TEST_FUNCREF : I<(outs I32:$res), (ins TypeIndex:$type, FUNCREF:$ref),
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(outs), (ins TypeIndex:$type), [],
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"ref.test\t$type, $ref", "ref.test $type", 0xfb14>,
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Requires<[HasGC]>;
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defm "" : REF_I<FUNCREF, funcref, "func">;
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defm "" : REF_I<EXTERNREF, externref, "extern">;
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defm "" : REF_I<EXNREF, exnref, "exn">;
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foreach rc = [FUNCREF, EXTERNREF, EXNREF] in {
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def : Pat<(select (i32 (setne I32:$cond, 0)), rc:$lhs, rc:$rhs),
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(!cast<Instruction>("SELECT_"#rc) rc:$lhs, rc:$rhs, I32:$cond)>;
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def : Pat<(select (i32 (seteq I32:$cond, 0)), rc:$lhs, rc:$rhs),
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(!cast<Instruction>("SELECT_"#rc) rc:$rhs, rc:$lhs, I32:$cond)>;
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}
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