1 //===- WebAssemblyInstrCall.td-WebAssembly Call codegen support -*- tablegen -*-
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
10 /// WebAssembly Call operand code-gen constructs.
12 //===----------------------------------------------------------------------===//
14 // TODO: addr64: These currently assume the callee address is 32-bit.
15 // FIXME: add $type to first call_indirect asmstr (and maybe $flags)
17 // Call sequence markers. These have an immediate which represents the amount of
18 // stack space to allocate or free, which is used for varargs lowering.
19 let Uses = [SP32, SP64], Defs = [SP32, SP64], isCodeGenOnly = 1 in {
20 defm ADJCALLSTACKDOWN : NRI<(outs), (ins i32imm:$amt, i32imm:$amt2),
21 [(WebAssemblycallseq_start timm:$amt, timm:$amt2)]>;
22 defm ADJCALLSTACKUP : NRI<(outs), (ins i32imm:$amt, i32imm:$amt2),
23 [(WebAssemblycallseq_end timm:$amt, timm:$amt2)]>;
24 } // Uses = [SP32, SP64], Defs = [SP32, SP64], isCodeGenOnly = 1
27 let Uses = [SP32, SP64], isCall = 1 in {
29 // CALL should take both variadic arguments and produce variadic results, but
30 // this is not possible to model directly. Instead, we select calls to a
31 // CALL_PARAMS taking variadic arguments linked with a CALL_RESULTS that handles
32 // producing the call's variadic results. We recombine the two in a custom
33 // inserter hook after DAG ISel, so passes over MachineInstrs will only ever
34 // observe CALL nodes with all of the expected variadic uses and defs.
37 I<(outs), (ins function32_op:$callee, variable_ops),
38 (outs), (ins function32_op:$callee), [],
39 "call_params\t$callee", "call_params\t$callee", -1>;
41 let variadicOpsAreDefs = 1, usesCustomInserter = 1, isPseudo = 1 in
43 I<(outs), (ins variable_ops), (outs), (ins), [],
44 "call_results", "call_results", -1>;
46 let variadicOpsAreDefs = 1, usesCustomInserter = 1, isPseudo = 1 in
47 defm RET_CALL_RESULTS :
48 I<(outs), (ins variable_ops), (outs), (ins), [],
49 "return_call_results", "return_call_results", -1>;
51 // Note that instructions with variable_ops have custom printers in
52 // WebAssemblyInstPrinter.cpp.
54 let variadicOpsAreDefs = 1 in
56 I<(outs), (ins function32_op:$callee, variable_ops),
57 (outs), (ins function32_op:$callee), [],
58 "call", "call\t$callee", 0x10>;
60 let variadicOpsAreDefs = 1 in
63 (ins TypeIndex:$type, table32_op:$table, variable_ops),
65 (ins TypeIndex:$type, table32_op:$table),
67 "call_indirect", "call_indirect\t$type, $table", 0x11>;
69 let isReturn = 1, isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in
71 I<(outs), (ins function32_op:$callee, variable_ops),
72 (outs), (ins function32_op:$callee), [],
73 "return_call \t$callee", "return_call\t$callee", 0x12>,
74 Requires<[HasTailCall]>;
76 let isReturn = 1, isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in
77 defm RET_CALL_INDIRECT :
78 I<(outs), (ins TypeIndex:$type, table32_op:$table, variable_ops),
79 (outs), (ins TypeIndex:$type, table32_op:$table), [],
80 "return_call_indirect\t", "return_call_indirect\t$type, $table",
82 Requires<[HasTailCall]>;
84 } // Uses = [SP32,SP64], isCall = 1