c++/6212: g++ testsuite EH regressions for irix6 -mabi=64

[David.Billinghurst@riotinto.com]

>Number:         6212
>Category:       c++
>Synopsis:       g++ testsuite EH regressions for irix6 -mabi=64
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 06 22:56:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     David Billinghurst
>Release:        3.1 and 3.2
>Organization:
>Environment:
mips-sgi-irix6.5
mips-sgi-irix6.2
>Description:
There are around 100 failures in g++ testsuite with 3.1 on 
irix 6.5.  They are runtime failures consistent with broken 
exception handling.

Looking back through gcc-testresults
 - 20010529 is OK (http://gcc.gnu.org/ml/gcc-testresults/2001-05/msg00714.html)
 - 20010611 fails (http://gcc.gnu.org/ml/gcc-testresults/2001-06/msg00276.html)


There was some discussion at the time:
 - http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00894.html
 - http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg01005.html
 - http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg01489.html

which pointed to patch:

Sat Jun  2 06:53:50 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>

	* tree.h (struct record_layout_info_s): New field unpadded_align.
	(set_lang_adjust_rli): New declaration.
	* stor-layout.c (layout_decl): If DECL is packed, but at alignment
	it would have if not packed, do not downgrade DECL_ALIGN.
	(lang_adjust_rli, set_lang_adjust_rli): New.
	(start_record_layout): Initialize new field unpadded_align.
	(debug_rli): Display it.
	(place_union_field, place_field): Set it.
	(layout_type, case RECORD_TYPE): Call via lang_adjust_rli if set.

	* print-tree.c (print_node): Don't print "regdecl" when bit doesn't
	mean that; use proper names instead.
	Print DECL_NO_STATIC_CHAIN.

	* except.c (expand_builtin_frob_return_addr): Add missing call
	to convert_memory_address #ifdef POINTERS_EXTEND_UNSIGNED.
	(expand_builtin_eh_return): Likewise.
	(expand_eh_return): Clean up ptr_mode != Pmode cases.

>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: