forked from OSchip/llvm-project
111 lines
4.1 KiB
TableGen
111 lines
4.1 KiB
TableGen
//===- WebAssemblyInstrControl.td-WebAssembly control-flow ------*- tablegen -*-
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
///
|
|
/// \file
|
|
/// \brief WebAssembly control-flow code-gen constructs.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
let Defs = [ARGUMENTS] in {
|
|
|
|
let isBranch = 1, isTerminator = 1, hasCtrlDep = 1 in {
|
|
// The condition operand is a boolean value which WebAssembly represents as i32.
|
|
def BR_IF : I<(outs), (ins bb_op:$dst, I32:$cond),
|
|
[(brcond I32:$cond, bb:$dst)],
|
|
"br_if \t$dst, $cond">;
|
|
let isCodeGenOnly = 1 in
|
|
def BR_UNLESS : I<(outs), (ins bb_op:$dst, I32:$cond), [],
|
|
"br_unless\t$dst, $cond">;
|
|
let isBarrier = 1 in {
|
|
def BR : I<(outs), (ins bb_op:$dst),
|
|
[(br bb:$dst)],
|
|
"br \t$dst">;
|
|
} // isBarrier = 1
|
|
} // isBranch = 1, isTerminator = 1, hasCtrlDep = 1
|
|
|
|
} // Defs = [ARGUMENTS]
|
|
|
|
def : Pat<(brcond (i32 (setne I32:$cond, 0)), bb:$dst),
|
|
(BR_IF bb_op:$dst, I32:$cond)>;
|
|
def : Pat<(brcond (i32 (seteq I32:$cond, 0)), bb:$dst),
|
|
(BR_UNLESS bb_op:$dst, I32:$cond)>;
|
|
|
|
let Defs = [ARGUMENTS] in {
|
|
|
|
// TODO: SelectionDAG's lowering insists on using a pointer as the index for
|
|
// jump tables, so in practice we don't ever use BR_TABLE_I64 in wasm32 mode
|
|
// currently.
|
|
// Set TSFlags{0} to 1 to indicate that the variable_ops are immediates.
|
|
// Set TSFlags{1} to 1 to indicate that the immediates represent labels.
|
|
let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
|
|
def BR_TABLE_I32 : I<(outs), (ins I32:$index, variable_ops),
|
|
[(WebAssemblybr_table I32:$index)],
|
|
"br_table \t$index"> {
|
|
let TSFlags{0} = 1;
|
|
let TSFlags{1} = 1;
|
|
}
|
|
def BR_TABLE_I64 : I<(outs), (ins I64:$index, variable_ops),
|
|
[(WebAssemblybr_table I64:$index)],
|
|
"br_table \t$index"> {
|
|
let TSFlags{0} = 1;
|
|
let TSFlags{1} = 1;
|
|
}
|
|
} // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
|
|
|
|
// Placemarkers to indicate the start or end of a block or loop scope. These
|
|
// use/clobber EXPR_STACK to prevent them from being moved into the middle of
|
|
// an expression tree.
|
|
let Uses = [EXPR_STACK], Defs = [EXPR_STACK] in {
|
|
def BLOCK : I<(outs), (ins), [], "block">;
|
|
def LOOP : I<(outs), (ins), [], "loop">;
|
|
def END_BLOCK : I<(outs), (ins), [], "end_block">;
|
|
def END_LOOP : I<(outs), (ins), [], "end_loop">;
|
|
} // Uses = [EXPR_STACK], Defs = [EXPR_STACK]
|
|
|
|
multiclass RETURN<WebAssemblyRegClass vt> {
|
|
def RETURN_#vt : I<(outs), (ins vt:$val), [(WebAssemblyreturn vt:$val)],
|
|
"return \t$val">;
|
|
// Equivalent to RETURN_#vt, for use at the end of a function when wasm
|
|
// semantics return by falling off the end of the block.
|
|
let isCodeGenOnly = 1 in
|
|
def FALLTHROUGH_RETURN_#vt : I<(outs), (ins vt:$val), []>;
|
|
}
|
|
|
|
multiclass SIMD_RETURN<ValueType vt> {
|
|
def RETURN_#vt : SIMD_I<(outs), (ins V128:$val),
|
|
[(WebAssemblyreturn (vt V128:$val))],
|
|
"return \t$val">;
|
|
// Equivalent to RETURN_#vt, for use at the end of a function when wasm
|
|
// semantics return by falling off the end of the block.
|
|
let isCodeGenOnly = 1 in
|
|
def FALLTHROUGH_RETURN_#vt : SIMD_I<(outs), (ins V128:$val), []>;
|
|
}
|
|
|
|
let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
|
|
let isReturn = 1 in {
|
|
defm : RETURN<I32>;
|
|
defm : RETURN<I64>;
|
|
defm : RETURN<F32>;
|
|
defm : RETURN<F64>;
|
|
defm : SIMD_RETURN<v16i8>;
|
|
defm : SIMD_RETURN<v8i16>;
|
|
defm : SIMD_RETURN<v4i32>;
|
|
defm : SIMD_RETURN<v4f32>;
|
|
|
|
def RETURN_VOID : I<(outs), (ins), [(WebAssemblyreturn)], "return">;
|
|
|
|
// This is to RETURN_VOID what FALLTHROUGH_RETURN_#vt is to RETURN_#vt.
|
|
let isCodeGenOnly = 1 in
|
|
def FALLTHROUGH_RETURN_VOID : I<(outs), (ins), []>;
|
|
} // isReturn = 1
|
|
def UNREACHABLE : I<(outs), (ins), [(trap)], "unreachable">;
|
|
} // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
|
|
|
|
} // Defs = [ARGUMENTS]
|