// generates STXV instructions on
		// power9. The Short variation is used
		// if no loop is generated.

		// sizes >= 64 generate a loop as follows:

		// Set up loop counter in CTR, used by BC
		// XXLXOR clears VS32
		//       XXLXOR VS32,VS32,VS32
		//       MOVD len/64,REG_TMP
		//       MOVD REG_TMP,CTR
		//       loop:
		//       STXV VS32,0(R20)
		//       STXV VS32,16(R20)

	// will clobber the test pattern created by the caller
	ADDL	$(1024 * 8), SP

	// Ask signaller to setgid
	MOVL	$1, (BX)

	// Wait for setgid completion
loop:
	PAUSE
	MOVL	(BX), AX
	CMPL	AX, $0
	JNE	loop

	// Restore stack
	SUBL	$(1024 * 8), SP

	// will clobber the test pattern created by the caller
	ADD	$(1024 * 8), R15

	// Ask signaller to setgid
	MOVD	$·Baton(SB), R5
	MOVW	$1, 0(R5)

	// Wait for setgid completion
loop:
	SYNC
	MOVW	·Baton(SB), R3
	CMPBNE	R3, $0, loop

	// Restore stack
	SUB	$(1024 * 8), R15

	MOVBZ  ·useAsm(SB), R4
	LMG    dig+0(FP), R1, R3            // R2 = &p[0], R3 = len(p)
	MOVBZ  $2, R0                       // SHA-256 function code
	CMPBEQ R4, $0, generic

loop:
	KIMD R0, R2      // compute intermediate message digest (KIMD)
	BVS  loop        // continue if interrupted
	RET

generic:

	MOVBZ  ·useAsm(SB), R4
	LMG    dig+0(FP), R1, R3            // R2 = &p[0], R3 = len(p)
	MOVBZ  $3, R0                       // SHA-512 function code
	CMPBEQ R4, $0, generic

loop:
	KIMD R0, R2      // compute intermediate message digest (KIMD)
	BVS  loop        // continue if interrupted
	RET

generic:

    public void visitForLoop(ForStatement forLoop) {
        restrict(forLoop);
    }

    @Override
    public void visitWhileLoop(WhileStatement loop) {
        restrict(loop);
    }

    @Override
    public void visitDoWhileLoop(DoWhileStatement loop) {
        restrict(loop);
    }

    @Override
    public void visitIfElse(IfStatement ifElse) {
        restrict(ifElse);
    }

    @Override

func isOperationRunSerially(ch <-chan interface{}, quit chan<- interface{}) bool {
	defer close(quit)
	numOperationsStarted := 0
loop:
	for {
		select {
		case <-ch:
			numOperationsStarted++
			if numOperationsStarted > 1 {
				return false
			}
		case <-time.After(5 * time.Second):
			break loop
		}
	}
	return true
}

// RUN: tf-opt %s --tf-remove-unused-while-results --split-input-file | FileCheck %s

// Check that we remove the first result and operand from the loop because the
// result is unused and all other conditions are satisfied, that means:
// - the corresponding first block arguments are unused (except for `tf.OpB`
//   which is the defining op of the first result and will be pruned)
// - `tf.OpB` is not stateful

    TF_DeleteBuffer(buf);
    return def.DebugString();
  }

  TF_Status* s_;
  TF_Graph* graph_;
  std::vector<TF_Output> inputs_;   // The inputs to the while loop
  std::vector<TF_Output> outputs_;  // The final outputs of the while loop
  std::unique_ptr<TF_WhileParams> params_;
  std::unique_ptr<CSession> csession_;

 private:
  // Used to verify that errors don't change graph_

func signal_disable(uint32)
func signal_enable(uint32)
func signal_ignore(uint32)
func signal_ignored(uint32) bool
func signal_recv() uint32

func loop() {
	for {
		process(syscall.Signal(signal_recv()))
	}
}

func init() {
	watchSignalLoop = loop
}

const (
	numSig = 65 // max across all systems
)

func signum(sig os.Signal) int {
	switch sig := sig.(type) {
	case syscall.Signal: