{ir.OOR, types.TINT32}:  ssa.OpOr32,
	{ir.OOR, types.TUINT32}: ssa.OpOr32,
	{ir.OOR, types.TINT64}:  ssa.OpOr64,
	{ir.OOR, types.TUINT64}: ssa.OpOr64,

	{ir.OXOR, types.TINT8}:   ssa.OpXor8,
	{ir.OXOR, types.TUINT8}:  ssa.OpXor8,
	{ir.OXOR, types.TINT16}:  ssa.OpXor16,
	{ir.OXOR, types.TUINT16}: ssa.OpXor16,
	{ir.OXOR, types.TINT32}:  ssa.OpXor32,
	{ir.OXOR, types.TUINT32}: ssa.OpXor32,

	// Windows-specific stuff. Fix that and move this, once we
	// have a way to bundle this into std's net/http somehow.
	if runtime.GOOS == "windows" {
		if oe, ok := err.(*net.OpError); ok && oe.Op == "read" {
			if se, ok := oe.Err.(*os.SyscallError); ok && se.Syscall == "wsarecv" {
				const WSAECONNABORTED = 10053
				const WSAECONNRESET = 10054

		v.Op = OpCopy
		return true
	case OpWB:
		v.Op = Op386LoweredWB
		return true
	case OpXor16:
		v.Op = Op386XORL
		return true
	case OpXor32:
		v.Op = Op386XORL
		return true
	case OpXor8:
		v.Op = Op386XORL
		return true
	case OpZero:
		return rewriteValue386_OpZero(v)
	case OpZeroExt16to32:
		v.Op = Op386MOVWLZX
		return true
	case OpZeroExt8to16:
		v.Op = Op386MOVBLZX

		return true
	case OpXor16:
		v.Op = OpPPC64XOR
		return true
	case OpXor32:
		v.Op = OpPPC64XOR
		return true
	case OpXor64:
		v.Op = OpPPC64XOR
		return true
	case OpXor8:
		v.Op = OpPPC64XOR
		return true
	case OpZero:
		return rewriteValuePPC64_OpZero(v)
	case OpZeroExt16to32:
		v.Op = OpPPC64MOVHZreg
		return true
	case OpZeroExt16to64:
		v.Op = OpPPC64MOVHZreg

		return true
	case OpXor16:
		v.Op = OpS390XXORW
		return true
	case OpXor32:
		v.Op = OpS390XXORW
		return true
	case OpXor64:
		v.Op = OpS390XXOR
		return true
	case OpXor8:
		v.Op = OpS390XXORW
		return true
	case OpZero:
		return rewriteValueS390X_OpZero(v)
	case OpZeroExt16to32:
		v.Op = OpS390XMOVHZreg
		return true
	case OpZeroExt16to64:
		v.Op = OpS390XMOVHZreg

pkg net/http, type Transport struct, ReadBufferSize int
pkg net/http, type Transport struct, WriteBufferSize int
pkg net, method (*DNSConfigError) Unwrap() error
pkg net, method (*OpError) Unwrap() error
pkg net, type DNSError struct, IsNotFound bool
pkg net, type ListenConfig struct, KeepAlive time.Duration
pkg net/url, method (*Error) Unwrap() error
pkg os/exec, method (*Cmd) String() string

		v.Op = OpCopy
		return true
	case OpWB:
		v.Op = OpARMLoweredWB
		return true
	case OpXor16:
		v.Op = OpARMXOR
		return true
	case OpXor32:
		v.Op = OpARMXOR
		return true
	case OpXor8:
		v.Op = OpARMXOR
		return true
	case OpZero:
		return rewriteValueARM_OpZero(v)
	case OpZeroExt16to32:
		v.Op = OpARMMOVHUreg
		return true
	case OpZeroExt8to16:
		v.Op = OpARMMOVBUreg