optimization/6822: GCC 3.1.1 - Internal compiler error in extract_insn, at recog.c:2132

[glen@imodulo.com]

>Number:         6822
>Category:       optimization
>Synopsis:       GCC 3.1.1 - Internal compiler error in extract_insn, at recog.c:2132
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Sun May 26 12:16:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Glen Nakamura
>Release:        gcc version 3.1.1 20020526 (prerelease)
>Organization:
>Environment:
i586-pc-linux-gnu
>Description:
Compiling testcase results in the following ICE:

ice.c: In function `main':
ice.c:12: unrecognizable insn:
(insn:QI 59 24 60 (set (reg:CC 17 flags)
        (compare:CC (reg/v:QI 61)
            (const_int 128 [0x80]))) -1 (insn_list 24 (nil))
    (expr_list:REG_DEAD (reg/v:QI 61)
        (nil)))
ice.c:12: Internal compiler error in extract_insn, at recog.c:2132
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.

The testcase compiles fine w/ the GCC 3.1 release.
Possible regression on branch w.r.t. GCC 3.1...
>How-To-Repeat:
gcc -O2 ice.i
>Fix:

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