[PATCH] Fix PR target/10142 (SPARC64)

[Eric Botcazou]

Hi,

GCC currently (all 3.x releases I tested) doesn't correctly pass by value 
structures whose size is 8 < s <=16 on SPARC64. The 64-bit ABI requires such 
structures to be passed in registers if possible, (partially) on the stack 
otherwise. It turns out that, if a structure contains an "integer" field and 
the six integer slots have already been filled, the "integer" field is 
simply not passed at all.

Bootstrapped/regtested (c,c++,objc,f77 mainine) on sparc64-sun-solaris2.9.

No testcase because the patch fixes

FAIL: gcc.dg/compat/struct-by-value-2 c_compat_x_tst.o-c_compat_y_tst.o 
execute 
FAIL: gcc.dg/compat/struct-by-value-4 c_compat_x_tst.o-c_compat_y_tst.o 
execute 
FAIL: gcc.dg/compat/struct-by-value-8 c_compat_x_tst.o-c_compat_y_tst.o 
execute

against self as well as against the Sun Forte C compiler on mainline.

Ok for mainline? What about the 3.3 branch?

-- 
Eric Botcazou


2003-06-11  Eric Botcazou  <ebotcazou@libertysurf.fr>
               Christian Ehrhardt <ehrhardt@mathematik.uni-ulm.de>

	PR target/10142
	* config/sparc/sparc.c (function_arg_record_value_parms): Add
	new 'stack' field.
	(function_arg_record_value_1): Set 'stack' to 1 if we run out of
	integer slots for an integer field.
	(function_arg_record_value_3): Shift vector index.
	(function_arg_record_value_2): Likewise.
	(function_arg_record_value): Initialize 'stack' to 0.
	Set 'stack' to 1 if we run out of integer slots for an integer field.
	Generate (parallel [(expr_list (nil) ...) ...]) if 'stack' is set to 1.
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