backport: re PR target/90547 (ICE in gen_lowpart_general, at rtlhooks.c:63)

backport: re PR target/90547 (ICE in gen_lowpart_general, at rtlhooks.c:63)

	Backported from mainline
	2019-05-21  Uroš Bizjak  <ubizjak@gmail.com>

	* config/i386/cpuid.h (__cpuid): For 32bit targets, zero
	%ebx and %ecx bafore calling cpuid with leaf 1 or
	non-constant leaf argument.

	2019-05-21  Uroš Bizjak  <ubizjak@gmail.com>

	PR target/90547
	* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
	Avoid calling gen_lowpart with CONST operand.

testsuite/ChangeLog:

	Backported from mainline
	2019-05-21  Uroš Bizjak  <ubizjak@gmail.com>

	PR target/90547
	* gcc.target/i386/pr90547.c: New test.

From-SVN: r271537