o0 |= uint32(p.To.Reg&0x1f) << 21      // T
	o0 |= uint32(p.From.Offset&0x1f) << 11 // UIM
	out[0] = o0
}

// lxvp XTp,DQ(RA)
func type_lxvp(c *ctxt9, p *obj.Prog, t *Optab, out *[5]uint32) {
	o0 := GenOpcodes[p.As-AXXSETACCZ]
	o0 |= uint32((p.To.Reg>>5)&0x1) << 21       // TX
	o0 |= uint32((p.To.Reg>>1)&0xf) << 22       // Tp
	o0 |= uint32((p.From.Offset>>4)&0xfff) << 4 // DQ
	o0 |= uint32(p.From.Reg&0x1f) << 16         // RA

				ldr.Errorf(s, "TLS offset out of range %d", v)
			}

			var o0, o1 uint32
			if target.IsBigEndian() {
				o0 = uint32(val >> 32)
				o1 = uint32(val)
			} else {
				o0 = uint32(val)
				o1 = uint32(val >> 32)
			}

			// R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
			// turn ADRP to MOVZ
			o0 = 0xd2a00000 | uint32(o0&0x1f) | (uint32((v>>16)&0xffff) << 5)
			// R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC

00000050  11 ff 01 00 01 00 00 0b  00 04 03 00 01 02 00 17  |................|
00000060  00 00 16 03 03 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|
00000090  86 f7 0d 01 01 0b 05 00  30 1f 31 0b 30 09 06 03  |........0.1.0...|

00000050  11 ff 01 00 01 00 00 0b  00 04 03 00 01 02 00 17  |................|
00000060  00 00 16 03 03 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|
00000090  86 f7 0d 01 01 0b 05 00  30 1f 31 0b 30 09 06 03  |........0.1.0...|

00000050  11 ff 01 00 01 00 00 0b  00 04 03 00 01 02 00 17  |................|
00000060  00 00 16 03 01 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|
00000090  86 f7 0d 01 01 0b 05 00  30 1f 31 0b 30 09 06 03  |........0.1.0...|

00000050  11 ff 01 00 01 00 00 0b  00 04 03 00 01 02 00 17  |................|
00000060  00 00 16 03 03 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|
00000090  86 f7 0d 01 01 0b 05 00  30 1f 31 0b 30 09 06 03  |........0.1.0...|

	}

	c3 := WithValue(c2, k3, "c3k3")
	check(c3, "c2", "c1k1", "c2k2", "c3k3")

	c4 := WithValue(c3, k1, nil)
	check(c4, "c4", "", "c2k2", "c3k3")

	o0 := otherContext{Background()}
	check(o0, "o0", "", "", "")

	o1 := otherContext{WithValue(Background(), k1, "c1k1")}
	check(o1, "o1", "c1k1", "", "")

	o2 := WithValue(o1, k2, "o2k2")
	check(o2, "o2", "c1k1", "o2k2", "")

		if a.Uses == 0 {
			x.invalidateRecursively(a)
		}
	}

	return
}

func (x *expandState) decomposePair(pos src.XPos, b *Block, a, mem *Value, t0, t1 *types.Type, o0, o1 Op, rc *registerCursor) *Value {
	e := b.NewValue1(pos, o0, t0, a)
	pos = pos.WithNotStmt()
	mem = x.decomposeAsNecessary(pos, b, e, mem, rc.next(t0))
	e = b.NewValue1(pos, o1, t1, a)
	mem = x.decomposeAsNecessary(pos, b, e, mem, rc.next(t1))

//
// - arg_prfop_Rt:
//     prefectch operation encoded in the "Rt"
//
// - arg_sysreg_o0_op1_CRn_CRm_op2:
//     system register name encoded in the "o0:op1:CRn:CRm:op2"
//
// - arg_pstatefield_op1_op2__SPSel_05__DAIFSet_36__DAIFClr_37:
//     PSTATE field name encoded in the "op1:op2" field
//

>L\251\223=\211\257\224\267]uj\275y7\277\2701\310\361:\006\366\021\276<]\0167\201\276(\274\373\0132=\034\027d\273 l\n?\206[\350\267\250\242R\267glz\2654O-\276\374\010\211>\277\007\004?\277S\206\272\2437D\276\305\255\230\275\330\204#\276\326\271\302>o0\260>\307\206\201\271\231\335\335>^\262\004\271\304:\365\275\3054\276\270U\306\376<;HI<\2070\237\2671a\035>\300R\032=\237FD\267I\233\30298)x7v\025\017\276\316\014\343>H \261\267\226V\350\276\310\006\257>\207RM\274\315\372\360\274\271%\233\267\366Ld8...