For the 20th anniversary of https://gcc.gnu.org/gcc-3.4/sparc-abi.html, a new 
calling convention incompatibility with the vendor compiler (and the ABI) has 
been discovered in 64-bit mode, affecting small structures containing arrays 
of floating-point components.  The decision has been made to fix it on Solaris 
only at this point.

Bootstrapped/regtested on SPARC/Solaris 11.4 and SPARC64/Linux by Rainer (many 
thanks again) and applied on the mainline.


2024-04-25  Eric Botcazou  <ebotcazou@adacore.com>

	PR target/114416
	* config/sparc/sparc.h (SUN_V9_ABI_COMPATIBILITY): New macro.
	* config/sparc/sol2.h (SUN_V9_ABI_COMPATIBILITY): Redefine it.
	* config/sparc/sparc.cc (fp_type_for_abi): New predicate.
	(traverse_record_type): Use it to spot floating-point types.
	(compute_fp_layout): Also deal with array types.


2024-04-25  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc.target/sparc/small-struct-1.c: New test.

-- 
Eric Botcazou