)
	flagalloc(f.f)
	regalloc(f.f)
	checkFunc(f.f)
	// There should be a spill in loop1, and nowhere else.
	// TODO: resurrect moving spills out of loops? We could put spills at the start of both exit1 and exit2.
	if numSpills(f.blocks["loop1"]) != 1 {
		t.Errorf("spill missing from loop1")
	}
	if numSpills(f.blocks["loop2"]) != 0 {
		t.Errorf("spill present in loop2")
	}
	if numSpills(f.blocks["exit1"]) != 0 {

				stackPtrs.append(1)
			} else {
				stackPtrs.append(0)
			}
		} else {
			spill += goarch.PtrSize
		}
	}
	for i, arg := range t.InSlice() {
		stkStep := in.addArg(arg)
		if stkStep != nil {
			addTypeBits(stackPtrs, stkStep.stkOff, arg)
		} else {
			spill = align(spill, uintptr(arg.Align()))
			spill += arg.Size()
			for _, st := range in.stepsForValue(i) {
				if st.kind == abiStepPointer {

		// Rematerialize instead of loading from the spill location.
		c = v.copyIntoWithXPos(s.curBlock, pos)
	} else {
		// Load v from its spill location.
		spill := s.makeSpill(v, s.curBlock)
		if s.f.pass.debug > logSpills {
			s.f.Warnl(vi.spill.Pos, "load spill for %v from %v", v, spill)
		}
		c = s.curBlock.NewValue1(pos, OpLoadReg, v.Type, spill)
	}

	s.setOrig(c, v)

	if onWasmStack {

			}
			if v.Type.IsFlags() {
				flag = v
			}
		}
		for _, v := range b.ControlValues() {
			if v != flag && v.Type.IsFlags() {
				spill[v.ID] = true
			}
		}
		if v := end[b.ID]; v != nil && v != flag {
			spill[v.ID] = true
		}
	}

	// Add flag spill and recomputation where they are needed.
	var remove []*Value // values that should be checked for possible removal
	var oldSched []*Value

func readUint16le(b []byte) uint64 {
	y := uint64(binary.LittleEndian.Uint16(b))
	nop() // force spill
	return y
}

func readUint16be(b []byte) uint64 {
	y := uint64(binary.BigEndian.Uint16(b))
	nop() // force spill
	return y
}

func readUint32le(b []byte) uint64 {
	y := uint64(binary.LittleEndian.Uint32(b))
	nop() // force spill
	return y
}

func readUint32be(b []byte) uint64 {

	_ = b[1]            // bounds check
	x := *p             // load a byte
	y := uint16(x)      // zero extend to 16 bits
	b[0] = byte(y >> 8) // compute ROLW
	b[1] = byte(y)
	nop()               // spill/restore ROLW
	b[0] = byte(y >> 8) // use ROLW
	b[1] = byte(y)
}

//go:noinline
func f32(p *uint8, b []byte) {
	_ = b[3]             // bounds check
	x := *p              // load a byte

)

// Reader reads a byte stream, validates it, and produces trace events.
type Reader struct {
	r           *bufio.Reader
	lastTs      Time
	gen         *generation
	spill       *spilledBatch
	spillErr    error // error from reading spill
	frontier    []*batchCursor
	cpuSamples  []cpuSample
	order       ordering
	emittedSync bool

	go121Events *oldTraceConverter
}

// NewReader creates a new trace reader.

		evTable: &evTable{
			pcs: make(map[uint64]frame),
		},
		batches: make(map[ThreadID][]batch),
	}
	// Process the spilled batch.
	if spill != nil {
		g.gen = spill.gen
		if err := processBatch(g, *spill.batch); err != nil {
			return nil, nil, err
		}
		spill = nil
	}
	// Read batches one at a time until we either hit EOF or
	// the next generation.
	var spillErr error
	for {
		b, gen, err := readBatch(r)

		// Test case for argument spill slot.
		// If the spill slot was not counted for the frame size, it will (incorrectly) choose
		// call32 as the result has (exactly) 32 bytes. When the argument actually spills,
		// it clobbers the caller's frame (likely the return PC).
		{func(x *int) any { return x }, func(v any) [4]int64 {
			print() // force spill
			finalize(v.(*int))
			return [4]int64{}
		}},
	}

// Notes:
// - 386 fails due to spilling a register
// amd64:"TEXT\t.*, [$]0-"
// arm:"TEXT\t.*, [$]0-" (spills return address)
// arm64:"TEXT\t.*, [$]0-"
// ppc64x:"TEXT\t.*, [$]0-"
// s390x:"TEXT\t.*, [$]0-"
// Note: that 386 currently has to spill a register.
func KeepWanted(t *T) {
	*t = T{A: t.A, B: t.B, C: t.C, D: t.D}
}