ada: Call memcmp instead of Compare_Array_Unsigned_8 and...

... implement support for ordering comparisons of discrete array types.

This extends the Support_Composite_Compare_On_Target feature to ordering
comparisons of discrete array types as specified by RM 4.5.2(26/3), when
the component type is a byte (unsigned).

Implement support for ordering comparisons of discrete array types
with a two-pronged approach: for types with a size known at compile time,
this lets the gimplifier generate the call to memcmp (or else an optimize
version of it); otherwise, this directly generates the call to memcmp.

gcc/ada/

	* exp_ch4.adb (Expand_Array_Comparison): Remove the obsolete byte
	addressibility test. If Support_Composite_Compare_On_Target is true,
	immediately return for a component size of 8, an unsigned component
	type and aligned operands. Disable when Unnest_Subprogram_Mode is
	true (for LLVM).
	(Expand_N_Op_Eq): Adjust comment.
	* targparm.ads (Support_Composite_Compare_On_Target): Replace bit by
	byte in description and document support for ordering comparisons.
	* gcc-interface/utils2.cc (compare_arrays): Rename into...
	(compare_arrays_for_equality): ...this.  Remove redundant lines.
	(compare_arrays_for_ordering): New function.
	(build_binary_op) <comparisons>: Call compare_arrays_for_ordering
	to implement ordering comparisons for arrays.

0 files changed, 0 insertions, 0 deletions