optimization/5478: Internal compiler error in `change_address', at emit-rtl.c:1608

[maltieri@nergal.it]

>Number:         5478
>Category:       optimization
>Synopsis:       Internal compiler error in `change_address', at emit-rtl.c:1608
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 24 08:16:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Marco Altieri
>Release:        gcc version 3.0, gcc version 2.95.3
>Organization:
>Environment:
Linux Redhat 7.0
Windows 2000 Cygwin 2.78.2.3
>Description:
To expand a BIT_FIELD_REF or a COMPONENT_REF node,
expand_expr makes the assumption that the first operand
is a REG or A MEM, but in this case the operand is a
CONCAT.
>How-To-Repeat:
compile rs.c using optimizations:

gcc -O rs.c
gcc -O1 rs.c
gcc -O2 rs.c
gcc -O3 rs.c
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="rs.c"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="rs.c"

c3RydWN0IGNvbXBsZXh2YWxvcmkKewogIF9fY29tcGxleF9fICBpbnQgcDE7Cn07CgpzdHJ1Y3Qg
Y29tcGxleHZhbG9yaSBmdW56ICh2b2lkKQp7CiAgc3RydWN0IGNvbXBsZXh2YWxvcmkgcml0b3Ju
b19lcXVhemlvbmVfY29tcGxleDsKCiAgX19yZWFsX18gcml0b3Jub19lcXVhemlvbmVfY29tcGxl
eC5wMSA9IDMwOwogIAogIHJldHVybiByaXRvcm5vX2VxdWF6aW9uZV9jb21wbGV4Owp9Cg==