// and shared across all compilations.
type Config struct {
	arch           string // "amd64", etc.
	PtrSize        int64  // 4 or 8; copy of cmd/internal/sys.Arch.PtrSize
	RegSize        int64  // 4 or 8; copy of cmd/internal/sys.Arch.RegSize
	Types          Types
	lowerBlock     blockRewriter  // block lowering function, first round
	lowerValue     valueRewriter  // value lowering function, first round

	case TINT32, TUINT32:
		w = 4
		t.intRegs = 1

	case TINT64, TUINT64:
		w = 8
		t.align = uint8(RegSize)
		t.intRegs = uint8(8 / RegSize)

	case TFLOAT32:
		w = 4
		t.floatRegs = 1
		t.setAlg(AFLOAT32)

	case TFLOAT64:
		w = 8
		t.align = uint8(RegSize)
		t.floatRegs = 1
		t.setAlg(AFLOAT64)

	case TCOMPLEX64:
		w = 8
		t.align = 4
		t.floatRegs = 2

			sh.Entsize = uint64(ctxt.Arch.RegSize)
			sh.Addralign = uint64(ctxt.Arch.RegSize)
			shsym(sh, ldr, ldr.Lookup(".got", 0))

			sh = elfshname(".got.plt")
			sh.Type = uint32(elf.SHT_PROGBITS)
			sh.Flags = uint64(elf.SHF_ALLOC + elf.SHF_WRITE)
			sh.Entsize = uint64(ctxt.Arch.RegSize)
			sh.Addralign = uint64(ctxt.Arch.RegSize)
			shsym(sh, ldr, ldr.Lookup(".got.plt", 0))
		}

func (d TestFrontend) Func() *ir.Func {
	return d.f
}

var testTypes Types

func init() {
	// TODO(mdempsky): Push into types.InitUniverse or typecheck.InitUniverse.
	types.PtrSize = 8
	types.RegSize = 8
	types.MaxWidth = 1 << 50

	base.Ctxt = &obj.Link{Arch: &obj.LinkArch{Arch: &sys.Arch{Alignment: 1, CanMergeLoads: true}}}
	typecheck.InitUniverse()
	testTypes.SetTypPtrs()

		for _, v := range order {
			if v.Op != OpStore { // already rewritten
				continue
			}

			size := v.Aux.(*types.Type).Size()
			if size >= f.Config.RegSize || size == 0 {
				continue
			}

			for n := f.Config.RegSize / size; n > 1; n /= 2 {
				if combineStores(v, n) {
					continue
				}
			}
		}
	}
}

// Try to combine the n stores ending in root.

	default:
		base.FatalfAt(n.Pos(), "%v has unexpected Class %v", n, n.Class)
		return false
	}
}

func (s *ssafn) AllocFrame(f *ssa.Func) {
	s.stksize = 0
	s.stkptrsize = 0
	s.stkalign = int64(types.RegSize)
	fn := s.curfn

	// Mark the PAUTO's unused.
	for _, ln := range fn.Dcl {
		if ln.OpenDeferSlot() {
			// Open-coded defer slots have indices that were assigned

(Div16u x (Const16 [c])) && umagicOK16(c) && config.RegSize == 8 =>
  (Trunc64to16
    (Rsh64Ux64 <typ.UInt64>
      (Mul64 <typ.UInt64>
        (Const64 <typ.UInt64> [int64(1<<16+umagic16(c).m)])
        (ZeroExt16to64 x))
      (Const64 <typ.UInt64> [16+umagic16(c).s])))

// For 16-bit divides on 32-bit machines
(Div16u x (Const16 [c])) && umagicOK16(c) && config.RegSize == 4 && umagic16(c).m&1 == 0 =>
  (Trunc32to16

	}

	ir.InitLSym(fn, true)

	setupWasmABI(fn)

	pp := objw.NewProgs(fn, 0)
	defer pp.Free()
	pp.Text.To.Type = obj.TYPE_TEXTSIZE
	pp.Text.To.Val = int32(types.RoundUp(fn.Type().ArgWidth(), int64(types.RegSize)))
	// Wrapper functions never need their own stack frame
	pp.Text.To.Offset = 0
	pp.Flush()

	return true
}

	// cond: umagicOK16(c) && config.RegSize == 8
	// result: (Trunc64to16 (Rsh64Ux64 <typ.UInt64> (Mul64 <typ.UInt64> (Const64 <typ.UInt64> [int64(1<<16+umagic16(c).m)]) (ZeroExt16to64 x)) (Const64 <typ.UInt64> [16+umagic16(c).s])))
	for {
		x := v_0
		if v_1.Op != OpConst16 {
			break
		}
		c := auxIntToInt16(v_1.AuxInt)
		if !(umagicOK16(c) && config.RegSize == 8) {
			break
		}

			d.newrefattr(fld, dwarf.DW_AT_type, d.defptrto(d.dtolsym(dwhb.Sym)))
			newmemberoffsetattr(fld, abi.MapBucketCount+abi.MapBucketCount*(int32(keysize)+int32(valsize)))
			if d.arch.RegSize > d.arch.PtrSize {
				fld = d.newdie(dwhb, dwarf.DW_ABRV_STRUCTFIELD, "pad")
				d.newrefattr(fld, dwarf.DW_AT_type, d.uintptrInfoSym)