To restore powerpc bootstrap.

2019-11-19  Richard Sandiford  <richard.sandiford@arm.com>
gcc/
	Revert:
	2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

	* cse.c (cse_insn): Delete no-op register moves too.
	* simplify-rtx.c (comparison_to_mask): Handle unsigned comparisons.
	Take a second comparison to control the value for NE.
	(mask_to_comparison): Handle unsigned comparisons.
	(simplify_logical_relational_operation): Likewise.  Update call
	to comparison_to_mask.  Handle AND if !HONOR_NANs.
	(simplify_binary_operation_1): Call the above for AND too.

gcc/testsuite/
	Revert:
	2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

	* gcc.target/aarch64/sve/acle/asm/ptest_pmore.c: New test.

From-SVN: r278455