maxOutIdx = out.idx
					}
					outRegs[out.idx] = r
					used |= regMask(1) << r
					s.tmpused |= regMask(1) << r
				}
				// Record register choices
				if v.Type.IsTuple() {
					var outLocs LocPair
					if r := outRegs[0]; r != noRegister {
						outLocs[0] = &s.registers[r]
					}
					if r := outRegs[1]; r != noRegister {
						outLocs[1] = &s.registers[r]
					}