re PR target/85582 (wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode)

re PR target/85582 (wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode)

	PR target/85582
	* config/i386/i386.md (*ashl<dwi>3_doubleword_mask,
	*ashl<dwi>3_doubleword_mask_1, *<shift_insn><dwi>3_doubleword_mask,
	*<shift_insn><dwi>3_doubleword_mask_1): In condition require that
	the highest significant bit of the shift count mask is clear.  In
	check whether and[sq]i3 is needed verify that all significant bits
	of the shift count other than the highest are set.

	* gcc.c-torture/execute/pr85582-3.c: New test.

From-SVN: r259862