c/10201: [3.3/3.4] ICE in int_mode_for_mode, at stor-layout.c

c/10201: [3.3/3.4] ICE in int_mode_for_mode, at stor-layout.c

[zlomj9am]

>Number:         10201
>Category:       c
>Synopsis:       [3.3/3.4] ICE in int_mode_for_mode, at stor-layout.c
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 24 17:56:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     zlomj9am@artax.karlin.mff.cuni.cz
>Release:        3.3/3.4
>Organization:
>Environment:
ia64 linux
>Description:
When compiling a declaration of a structure (after its forward declaration and use) the DECL_RTL of the tree is VOIDmode and it is not updated to BLKmode.
This causes an ICE in int_mode_for_mode(VOIDmode), at stor-layout.c.
The testcase has to be compiled with optimization because then the functions are deferred and compiled after all global vars,  structs,...
Surprisingly I can reproduce it only on ia64 from the platforms I tested.

#0  fancy_abort (file=0x4000000000d0ca98 "../../gcc/stor-layout.c", line=306, function=0x4000000000d0cba8 "int_mode_for_mode") at ../../gcc/diagnostic.c:1367
#1  0x400000000091d790 in int_mode_for_mode (mode=VOIDmode) at ../../gcc/stor-layout.c:306
#2  0x40000000003865f0 in store_bit_field (str_rtx=0x2000000000327120, bitsize=32, bitnum=64, fieldmode=SImode, value=0x20000000003272c0, total_size=24)
    at ../../gcc/expmed.c:384
#3  0x40000000003d5af0 in store_field (target=0x2000000000327120, bitsize=32, bitpos=64, mode=SImode, exp=0x200000000036d080, value_mode=VOIDmode, unsignedp=0, 
    type=0x2000000000368000, alias_set=0) at ../../gcc/expr.c:5611
#4  0x40000000003c37a0 in expand_assignment (to=0x200000000036d050, from=0x200000000036d080, want_value=0, suggest_reg=1) at ../../gcc/expr.c:4186
#5  0x4000000000427c90 in expand_expr (exp=0x200000000036d0b0, target=0x0, tmode=VOIDmode, modifier=EXPAND_NORMAL) at ../../gcc/expr.c:9115
#6  0x40000000008ef2e0 in expand_expr_stmt_value (exp=0x200000000036d0b0, want_value=0, maybe_last=1) at ../../gcc/stmt.c:2197
#7  0x400000000017ace0 in genrtl_expr_stmt_value (expr=0x200000000036d0b0, want_value=0, maybe_last=1) at ../../gcc/c-semantics.c:358
#8  0x40000000001833a0 in expand_stmt (t=0x200000000036d110) at ../../gcc/c-semantics.c:814
#9  0x4000000000181cd0 in genrtl_compound_stmt (t=0x200000000036cea0) at ../../gcc/c-semantics.c:727
#10 0x40000000001834c0 in expand_stmt (t=0x200000000036cea0) at ../../gcc/c-semantics.c:841
#11 0x4000000000097600 in c_expand_body_1 (fndecl=0x2000000000368f70, nested_p=0) at ../../gcc/c-decl.c:6566
#12 0x4000000000098b80 in c_expand_body (fndecl=0x2000000000368f70) at ../../gcc/c-decl.c:6671
#13 0x4000000000096bc0 in c_expand_deferred_function (fndecl=0x2000000000368f70) at ../../gcc/c-decl.c:6513
#14 0x4000000000190fa0 in expand_deferred_fns () at ../../gcc/c-objc-common.c:304
#15 0x4000000000191d30 in c_objc_common_finish_file () at ../../gcc/c-objc-common.c:369
#16 0x4000000000022e70 in finish_file () at ../../gcc/c-lang.c:222
#17 0x40000000000043d0 in yyparse () at c-parse.y:341
#18 0x4000000000164d50 in c_common_parse_file (set_yydebug=0) at ../../gcc/c-opts.c:1630
#19 0x40000000009448c0 in compile_file () at ../../gcc/toplev.c:2197
#20 0x4000000000959530 in do_compile () at ../../gcc/toplev.c:5545
#21 0x40000000009596e0 in toplev_main (argc=3, argv=0x60000fffffffaf58) at ../../gcc/toplev.c:5580
#22 0x40000000001e5050 in main (argc=3, argv=0x60000fffffffaf58) at ../../gcc/main.c:37

>How-To-Repeat:
cc1 -O z.i
>Fix:

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