}
	for i, v := range tests {
		result := mergePPC64ClrlsldiSrw(int64(v.clrlsldi), v.srw)
		if v.valid && result == 0 {
			t.Errorf("mergePPC64ClrlsldiSrw(Test %d) did not merge", i)
		} else if !v.valid && result != 0 {
			t.Errorf("mergePPC64ClrlsldiSrw(Test %d) should return 0", i)
		} else if r, _, _, m := DecodePPC64RotateMask(result); v.rotate != r || v.mask != m {

// Merge shift right + shift left and clear left (e.g for a table lookup)
(CLRLSLDI [c] (SRWconst [s] x)) && mergePPC64ClrlsldiSrw(int64(c),s) != 0 => (RLWINM [mergePPC64ClrlsldiSrw(int64(c),s)] x)
(CLRLSLDI [c] (SRDconst [s] x)) && mergePPC64ClrlsldiSrd(int64(c),s) != 0 => (RLWINM [mergePPC64ClrlsldiSrd(int64(c),s)] x)

}

// Test if a word shift right feeding into a CLRLSLDI can be merged into RLWINM.
// Return the encoded RLWINM constant, or 0 if they cannot be merged.
func mergePPC64ClrlsldiSrw(sld, srw int64) int64 {
	mask_1 := uint64(0xFFFFFFFF >> uint(srw))
	// for CLRLSLDI, it's more convenient to think of it as a mask left bits then rotate left.

	v_0 := v.Args[0]
	// match: (CLRLSLDI [c] (SRWconst [s] x))
	// cond: mergePPC64ClrlsldiSrw(int64(c),s) != 0
	// result: (RLWINM [mergePPC64ClrlsldiSrw(int64(c),s)] x)
	for {
		c := auxIntToInt32(v.AuxInt)
		if v_0.Op != OpPPC64SRWconst {
			break
		}
		s := auxIntToInt64(v_0.AuxInt)
		x := v_0.Args[0]
		if !(mergePPC64ClrlsldiSrw(int64(c), s) != 0) {
			break
		}
		v.reset(OpPPC64RLWINM)