Re: c/2035: Internal compiler error on complex casts. Only with optimisation.

Re: c/2035: Internal compiler error on complex casts. Only with optimisation.

[jsm28]

Synopsis: Internal compiler error on complex casts. Only with optimisation.

State-Changed-From-To: open->feedback
State-Changed-By: jsm28
State-Changed-When: Fri Jun 22 03:43:02 2001
State-Changed-Why:
    Does this problem still occur with GCC 3.0?

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=2035&database=gcc

Re: c/2035: Internal compiler error on complex casts. Only with optimisation.

[jsm28]

Synopsis: Internal compiler error on complex casts. Only with optimisation.

State-Changed-From-To: feedback->analyzed
State-Changed-By: jsm28
State-Changed-When: Mon Jun 25 00:00:28 2001
State-Changed-Why:
    Submitter comfirms problem still present in GCC 3.0.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=2035&database=gcc

c/2035: Internal compiler error on complex casts. Only with optimisation.

[emmerik]

>Number:         2035
>Category:       c
>Synopsis:       Internal compiler error on complex casts. Only with optimisation.
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 19 23:06:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Mike Van Emmerik
>Release:        unknown-1.0
>Organization:
>Environment:
Sparc solaris 2.8
 $ gcc -v
Reading specs from /opt/local/stow/gcc-2.95.2.1/lib/gcc-lib/sparc-sun-solaris2.8/2.95.2.1/specs
gcc version 2.95.2.1 19991024 (release)
>Description:
ICE on legal code. Note: compiles OK with no optimisations. Works with Sun C compiler.

I strongly suspect this line:
 *(int32*)&d65.f.f35= *((int32*)(((int*)(&v8))+(1)));
This unusual but correct code is machine generated (!).

$ make
gcc -w -O4    -c -o main.o main.c
main.c: In function `main':
main.c:64: Internal compiler error in `extract_bit_field', at expmed.c:1081
Please submit a full bug report.
See <URL: http://www.gnu.org/software/gcc/faq.html#bugreport > for instructions.

Note that the URL given is redirected now.
>How-To-Repeat:
gcc -w -O4    -c -o main.o main.c
Withiut the -O4, compiles fine.
Working program should output:
"Two thirds is 0.666666666667"

Probably offending line is:
 *(int32*)&d65.f.f35= *((int32*)(((int*)(&v8))+(1)));
>Fix:

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