// Second, if ContentErr==nil, the content should match Content.
	// If content is large, an alternative to setting Content is to set File,
	// which names a file in the testdata/ directory containing the
	// uncompressed expected content.
	// If content is very large, an alternative to setting Content or File
	// is to set Size, which will then be checked against the header-reported size

	ADDW	$0x10001000, R1               // ADDW	$268439552, R1              // fb83043221001b0b
	ADDW	$0x22220000, RSP, R3          // ADDW	$572653568, RSP, R3         // 5b44a452e3433b0b

// move a large constant to a Vd.
	VMOVS	$0x80402010, V11                                      // VMOVS	$2151686160, V11
	VMOVD	$0x8040201008040201, V20                              // VMOVD	$-9205322385119247871, V20

			"-fno-builtin",
		)
	}

	c = append(c, p.GccOptions...)
	c = append(c, p.gccMachine()...)
	if goos == "aix" {
		c = append(c, "-maix64")
		c = append(c, "-mcmodel=large")
	}
	// disable LTO so we get an object whose symbols we can read
	c = append(c, "-fno-lto")
	c = append(c, "-") //read input from standard input
	return c
}