// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package ssa

type T struct{}

func (T) foo() {}

type fooer interface {
	foo()
}

func Works(v interface{}) {
	switch v.(type) {
	case interface{}:
		v.(fooer).foo()
	}
}

func Panics(v interface{}) {
	switch v.(type) {
	case interface{}:

	switch v.Op {
	case ssa.OpWasmI64Eqz, ssa.OpWasmI64Eq, ssa.OpWasmI64Ne, ssa.OpWasmI64LtS, ssa.OpWasmI64LtU, ssa.OpWasmI64GtS, ssa.OpWasmI64GtU, ssa.OpWasmI64LeS, ssa.OpWasmI64LeU, ssa.OpWasmI64GeS, ssa.OpWasmI64GeU,
		ssa.OpWasmF32Eq, ssa.OpWasmF32Ne, ssa.OpWasmF32Lt, ssa.OpWasmF32Gt, ssa.OpWasmF32Le, ssa.OpWasmF32Ge,
		ssa.OpWasmF64Eq, ssa.OpWasmF64Ne, ssa.OpWasmF64Lt, ssa.OpWasmF64Gt, ssa.OpWasmF64Le, ssa.OpWasmF64Ge:
		return true

	// 2-address opcode arithmetic
	case ssa.Op386SUBL,
		ssa.Op386MULL,
		ssa.Op386ANDL,
		ssa.Op386ORL,
		ssa.Op386XORL,
		ssa.Op386SHLL,
		ssa.Op386SHRL, ssa.Op386SHRW, ssa.Op386SHRB,
		ssa.Op386SARL, ssa.Op386SARW, ssa.Op386SARB,
		ssa.Op386ROLL, ssa.Op386ROLW, ssa.Op386ROLB,
		ssa.Op386ADDSS, ssa.Op386ADDSD, ssa.Op386SUBSS, ssa.Op386SUBSD,
		ssa.Op386MULSS, ssa.Op386MULSD, ssa.Op386DIVSS, ssa.Op386DIVSD,
		ssa.Op386PXOR,

		ssa.OpS390XCFEBRA, ssa.OpS390XCFDBRA, ssa.OpS390XCGEBRA, ssa.OpS390XCGDBRA,
		ssa.OpS390XCELFBR, ssa.OpS390XCDLFBR, ssa.OpS390XCELGBR, ssa.OpS390XCDLGBR,
		ssa.OpS390XCLFEBR, ssa.OpS390XCLFDBR, ssa.OpS390XCLGEBR, ssa.OpS390XCLGDBR,
		ssa.OpS390XLDEBR, ssa.OpS390XLEDBR,
		ssa.OpS390XFNEG, ssa.OpS390XFNEGS,
		ssa.OpS390XLPDFR, ssa.OpS390XLNDFR:
		opregreg(s, v.Op.Asm(), v.Reg(), v.Args[0].Reg())

	if isStmt {
		return s.curBlock.NewValue1A(s.peekPos(), op, t, aux, arg)
	}
	return s.curBlock.NewValue1A(s.peekPos().WithNotStmt(), op, t, aux, arg)
}

// newValue1I adds a new value with one argument and an auxint value to the current block.
func (s *state) newValue1I(op ssa.Op, t *types.Type, aux int64, arg *ssa.Value) *ssa.Value {

		ssa.OpPPC64MULLD, ssa.OpPPC64MULLW, ssa.OpPPC64DIVDU, ssa.OpPPC64DIVWU,
		ssa.OpPPC64SRAD, ssa.OpPPC64SRAW, ssa.OpPPC64SRD, ssa.OpPPC64SRW, ssa.OpPPC64SLD, ssa.OpPPC64SLW,
		ssa.OpPPC64ROTL, ssa.OpPPC64ROTLW,
		ssa.OpPPC64MULHD, ssa.OpPPC64MULHW, ssa.OpPPC64MULHDU, ssa.OpPPC64MULHWU,
		ssa.OpPPC64FMUL, ssa.OpPPC64FMULS, ssa.OpPPC64FDIV, ssa.OpPPC64FDIVS, ssa.OpPPC64FCPSGN,

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package ssa

type T struct{}

func (T) foo() {}

type fooer interface {
	foo()
}

func Unused(v interface{}) {
	v.(fooer).foo()
	v.(interface{ foo() }).foo()

	s         *state                   // SSA state
	f         *ssa.Func                // function to work on
	fwdrefs   []*ssa.Value             // list of FwdRefs to be processed
	defvars   []map[ir.Node]*ssa.Value // defined variables at end of each block
	reachable []bool                   // which blocks are reachable
}

func (s *simplePhiState) insertPhis() {
	s.reachable = ssa.ReachableBlocks(s.f)

	// Find FwdRef ops.

	SSAMarkMoves func(*State, *ssa.Block)

	// SSAGenValue emits Prog(s) for the Value.
	SSAGenValue func(*State, *ssa.Value)

	// SSAGenBlock emits end-of-block Progs. SSAGenValue should be called
	// for all values in the block before SSAGenBlock.
	SSAGenBlock func(s *State, b, next *ssa.Block)

	// LoadRegResult emits instructions that loads register-assigned result

//   - ssa/check/on enables checking after each phase
//   - ssa/all/time enables time reporting for all phases
//
// See gc/lex.go for dissection of the option string.
// Example uses:
//
// GO_GCFLAGS=-d=ssa/generic_cse/time,ssa/generic_cse/stats,ssa/generic_cse/debug=3 ./make.bash
//
// BOOT_GO_GCFLAGS=-d='ssa/~^.*scc$/off' GO_GCFLAGS='-d=ssa/~^.*scc$/off' ./make.bash