TEXT runtime·memequal<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-25
	BEQ	R4, R5, eq
	ADDV	R4, R6, R7
	PCALIGN	$16
loop:
	BNE	R4, R7, test
	MOVV	$1, R4
	RET
test:
	MOVBU	(R4), R9
	ADDV	$1, R4
	MOVBU	(R5), R10
	ADDV	$1, R5
	BEQ	R9, R10, loop

	MOVB    R0, R4
	RET
eq:
	MOVV	$1, R4
	RET

// memequal_varlen(a, b unsafe.Pointer) bool

stdout go1.21.99

# Toolchain target mismatch should be detected.
env TESTGO_VERSION_SWITCH=mismatch
! go version
stderr '^go: toolchain go1.21.1 invoked to provide go1.21.99$'

# Toolchain loop should be detected.
env TESTGO_VERSION_SWITCH=loop
! go version
stderr -count=10 '^go: switching from go1.21.1 to go1.21.99 \[depth 9[0-9]\]$'
stderr -count=1 '^go: switching from go1.21.1 to go1.21.99 \[depth 100\]$'

      "tf.Yield"(%ne) : (tensor<i1>) -> ()
    },
    {
      // loop body
      ^bb0(%barg0: tensor<4xf32>, %barg1: tensor<i32>):
      %add = "tf.Add"(%barg0, %barg0) : (tensor<4xf32>, tensor<4xf32>) -> tensor<4xf32>
      %one = arith.constant dense<1> : tensor<i32>
      %sub = "tf.Sub"(%barg1, %one) : (tensor<i32>, tensor<i32>) -> tensor<i32>

      // Some loop invariant math

			Goto("loop"),
		),
		Bloc("loop",
			Valu("memphi", OpPhi, types.TypeMem, 0, nil, "mem", "call"),
			Valu("call", OpAMD64CALLstatic, types.TypeMem, 0, AuxCallLSym("_"), "memphi"),
			Valu("test", OpAMD64CMPBconst, types.TypeFlags, 0, nil, "cond"),
			Eq("test", "next", "exit"),
		),
		Bloc("next",
			Goto("loop"),
		),
		Bloc("exit",

	// first word
	MOVW.P	4(R2), R6
	MOVW	R6>>R3, R7
	MOVW	R6<<R4, R6
	MOVW	R6, c+28(FP)
	B E6

	// word loop
L6:
	MOVW.P	4(R2), R6
	ORR	R6<<R4, R7
	MOVW.P	R7, 4(R1)
	MOVW	R6>>R3, R7
E6:
	TEQ	R1, R5
	BNE	L6

	MOVW	R7, 0(R1)
	RET

Y6:	// copy loop, because shift 0 == shift 32
	MOVW.P	4(R2), R6
	MOVW.P	R6, 4(R1)
	TEQ R1, R5
	BNE Y6

X6:
	MOVW	$0, R1

	// Reconciler runs a periodic loop to reconcile the desired state of the with
	// the actual state of the world by triggering attach detach operations.
	// This flag enables or disables reconcile.  Is false by default, and thus enabled.
	DisableAttachDetachReconcilerSync bool
	// ReconcilerSyncLoopPeriod is the amount of time the reconciler sync states loop
	// wait between successive executions. Is set to 60 sec by default.

	return fw.result
}

// Stop stops the upstream watch, which will eventually stop this watch.
func (fw *filteredWatch) Stop() {
	fw.incoming.Stop()
}

// loop waits for new values, filters them, and resends them.
func (fw *filteredWatch) loop() {
	defer close(fw.result)
	for event := range fw.incoming.ResultChan() {
		filtered, keep := fw.f(event)
		if keep {
			fw.result <- filtered
		}
	}
}

  // Fourth, add all the inputs to sc_forward(). These all come from the
  // while loop operands or the non_tpu() call that's in the loop body. The
  // loop operands need to be pulled from the "i" (or "2") version of the
  // inputs. The inputs coming from non_tpu() are from the same loop iteration
  // (non_tpu_res_i).
  std::vector<Value> f_operands;

	MOVQ x+24(FP), R8
	MOVQ y+48(FP), R9
	MOVQ z+0(FP), R10

	MOVQ $0, CX		// c = 0
	MOVQ $0, SI		// i = 0

	// s/JL/JMP/ below to disable the unrolled loop
	SUBQ $4, DI		// n -= 4
	JL V1			// if n < 0 goto V1

U1:	// n >= 0
	// regular loop body unrolled 4x
	ADDQ CX, CX		// restore CF
	MOVQ 0(R8)(SI*8), R11
	MOVQ 8(R8)(SI*8), R12
	MOVQ 16(R8)(SI*8), R13
	MOVQ 24(R8)(SI*8), R14
	ADCQ 0(R9)(SI*8), R11

// pause the event loop and spawn a new goroutine.
// Other wrapped functions which are triggered during a call from Go to JavaScript
// get executed on the same goroutine.
//
// As a consequence, if one wrapped function blocks, JavaScript's event loop
// is blocked until that function returns. Hence, calling any async JavaScript
// API, which requires the event loop, like fetch (http.Client), will cause an