forked from OSchip/llvm-project
88 lines
3.3 KiB
TableGen
88 lines
3.3 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 Defs = [ARGUMENTS] in {
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let isBranch = 1, isTerminator = 1, hasCtrlDep = 1 in {
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// The condition operand is a boolean value which WebAssembly represents as i32.
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def BR_IF : I<(outs), (ins bb_op:$dst, I32:$cond),
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[(brcond I32:$cond, bb:$dst)],
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"br_if \t$dst, $cond">;
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let isCodeGenOnly = 1 in
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def BR_UNLESS : I<(outs), (ins bb_op:$dst, I32:$cond), [],
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"br_unless\t$dst, $cond">;
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let isBarrier = 1 in {
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def BR : I<(outs), (ins bb_op:$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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} // Defs = [ARGUMENTS]
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def : Pat<(brcond (i32 (setne I32:$cond, 0)), bb:$dst),
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(BR_IF bb_op:$dst, I32:$cond)>;
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def : Pat<(brcond (i32 (seteq I32:$cond, 0)), bb:$dst),
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(BR_UNLESS bb_op:$dst, I32:$cond)>;
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let Defs = [ARGUMENTS] in {
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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 TABLESWITCH_I64 in wasm32 mode
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// currently.
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// Set TSFlags{0} to 1 to indicate that the variable_ops are immediates.
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// Set TSFlags{1} to 1 to indicate that the immediates represent labels.
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let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
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def TABLESWITCH_I32 : I<(outs), (ins I32:$index, bb_op:$default, variable_ops),
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[(WebAssemblytableswitch I32:$index, bb:$default)],
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"tableswitch\t$index, $default"> {
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let TSFlags{0} = 1;
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let TSFlags{1} = 1;
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}
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def TABLESWITCH_I64 : I<(outs), (ins I64:$index, bb_op:$default, variable_ops),
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[(WebAssemblytableswitch I64:$index, bb:$default)],
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"tableswitch\t$index, $default"> {
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let TSFlags{0} = 1;
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let TSFlags{1} = 1;
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}
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} // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
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// Placemarkers to indicate the start or end of a block or loop scope. These
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// use/clobber EXPR_STACK to prevent them from being moved into the middle of
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// an expression tree.
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let Uses = [EXPR_STACK], Defs = [EXPR_STACK] in {
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def BLOCK : I<(outs), (ins), [], "block">;
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def LOOP : I<(outs), (ins), [], "loop">;
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def END_BLOCK : I<(outs), (ins), [], "end_block">;
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def END_LOOP : I<(outs), (ins), [], "end_loop">;
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} // Uses = [EXPR_STACK], Defs = [EXPR_STACK]
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multiclass RETURN<WebAssemblyRegClass vt> {
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def RETURN_#vt : I<(outs), (ins vt:$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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} // Defs = [ARGUMENTS]
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