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57 lines
2.1 KiB
TableGen
57 lines
2.1 KiB
TableGen
//===- WebAssemblyInstrControl.td-WebAssembly control-flow ------*- tablegen -*-
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief WebAssembly control-flow code-gen constructs.
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///
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//===----------------------------------------------------------------------===//
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let isBranch = 1, isTerminator = 1, hasCtrlDep = 1 in {
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def BR_IF : I<(outs), (ins I32:$a, bb_op:$dst),
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[(brcond I32:$a, bb:$dst)],
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"br_if \t$a, $dst">;
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let isBarrier = 1 in {
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def BR : I<(outs), (ins bb_op:$dst),
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[(br bb:$dst)],
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"br \t$dst">;
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} // isBarrier = 1
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} // isBranch = 1, isTerminator = 1, hasCtrlDep = 1
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// TODO: SelectionDAG's lowering insists on using a pointer as the index for
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// jump tables, so in practice we don't ever use SWITCH_I64 in wasm32 mode
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// currently.
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let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
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def SWITCH_I32 : I<(outs), (ins I32:$index, variable_ops),
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[(WebAssemblyswitch I32:$index)],
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"switch \t$index">;
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def SWITCH_I64 : I<(outs), (ins I64:$index, variable_ops),
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[(WebAssemblyswitch I64:$index)],
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"switch \t$index">;
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} // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
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// Placemarkers to indicate the start of a block or loop scope.
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def BLOCK : I<(outs), (ins bb_op:$dst), [], "block \t$dst">;
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def LOOP : I<(outs), (ins bb_op:$dst), [], "loop \t$dst">;
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multiclass RETURN<WebAssemblyRegClass vt> {
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def RETURN_#vt : I<(outs), (ins vt:$val), [(WebAssemblyreturn vt:$val)],
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"return \t$val">;
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}
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let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
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let isReturn = 1 in {
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defm : RETURN<I32>;
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defm : RETURN<I64>;
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defm : RETURN<F32>;
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defm : RETURN<F64>;
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def RETURN_VOID : I<(outs), (ins), [(WebAssemblyreturn)], "return">;
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} // isReturn = 1
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def UNREACHABLE : I<(outs), (ins), [(trap)], "unreachable">;
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} // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
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