// SRDconst on PPC64 is an extended mnemonic of RLDICL. If the input to an
// RLDICL is an SRDconst, and the RLDICL does not rotate its value, the two
// operations can be combined. This functions assumes the two opcodes can
// be merged, and returns an encoded rotate+mask value of the combined RLDICL.
func mergePPC64RLDICLandSRDconst(encoded, s int64) int64 {
	mb := s
	r := 64 - s
	// A larger mb is a smaller mask.
	if (encoded>>8)&0xFF < mb {

func testName(pkg, variant string) string {
	name := pkg
	if variant != "" {
		name += ":" + variant
	}
	return name
}

// goTest represents all options to a "go test" command. The final command will
// combine configuration from goTest and tester flags.
type goTest struct {
	timeout  time.Duration // If non-zero, override timeout
	short    bool          // If true, force -short
	tags     []string      // Build tags

	// Marshal metadata
	crc := hashDeterministicBytes(c.MetaSys)
	c.MetaSys = nil
	if bts, err := c.MarshalMsg(metaDataPoolGet()); err == nil {
		crc ^= xxhash.Sum64(bts)
		metaDataPoolPut(bts)
	}

	// Combine upper and lower part
	var tmp [4]byte
	binary.LittleEndian.PutUint32(tmp[:], uint32(crc^(crc>>32)))
	return tmp
}

// UsesDataDir returns true if this object version uses its data directory for

        ":with_tpu_support_define",
        ":with_tpu_support_flag",
    ],
    visibility = ["//visibility:public"],
)

# Specifies via a config setting if this is a mobile build or not, makes
# it easier to combine settings later.
selects.config_setting_group(
    name = "mobile",
    match_any = [
        ":android",
        ":chromiumos",

(Sub(Ptr|64|32|16|8) ...) => (SUB ...)
(Sub32F ...) => (FSUBS ...)
(Sub64F ...) => (FSUB ...)

(Min(32|64)F x y) && buildcfg.GOPPC64 >= 9 => (XSMINJDP x y)
(Max(32|64)F x y) && buildcfg.GOPPC64 >= 9 => (XSMAXJDP x y)

// Combine 64 bit integer multiply and adds
(ADD l:(MULLD x y) z) && buildcfg.GOPPC64 >= 9 && l.Uses == 1 && clobber(l) => (MADDLD x y z)

(Mod16 x y) => (Mod32 (SignExt16to32 x) (SignExt16to32 y))

    /**
     * <p>Creates a new {@code FileTree} which contains the contents of the given ZIP file. The given zipPath path is
     * evaluated as per {@link #file(Object)}. You can combine this method with the {@link #copy(Action)}
     * method to unzip a ZIP file.</p>
     *
     * <p>The returned file tree is lazy, so that it scans for files only when the contents of the file tree are

	// xor with seed
	PXOR	X0, X2
	PXOR	X1, X3

	// scramble 3 times
	AESENC	X2, X2
	AESENC	X3, X3
	AESENC	X2, X2
	AESENC	X3, X3
	AESENC	X2, X2
	AESENC	X3, X3

	// combine results
	PXOR	X3, X2
	MOVQ	X2, AX	// return X2
	RET

aes33to64:
	// make 3 more starting seeds
	MOVO	X1, X2
	MOVO	X1, X3
	PXOR	runtime·aeskeysched+16(SB), X1

====

You can also see at the end of the example _how to combine file collections_ using the `+` and `-` operators to merge and subtract them.
An important feature of the resulting file collections is that they are _live_.
In other words, when you combine file collections this way, the result always reflects what's currently in the source file collections, even if they change during the build.

// Lowers ResizeNearestNeighbor to an indices computations with a gather along
// the combined spatial dimensions. Generating the indices along the
// width/height index could be used to gather along each of W and H dimension
// of the input image array. To reduce to a single gather, these indices are
// combined, so a single gather can be performed along the combined spatial
// dimensions.
//

      throw new UnsupportedOperationException("Not available on ImmutableSortedMap.Builder");
    }

    @CanIgnoreReturnValue
    Builder<K, V> combine(ImmutableSortedMap.Builder<K, V> other) {
      ensureCapacity(size + other.size);
      System.arraycopy(other.keys, 0, this.keys, this.size, other.size);