[Bug c/11639] New: -Os produces unrecognizable insn

["seffendi at web dot de" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11639

           Summary: -Os produces unrecognizable insn
           Product: gcc
           Version: 3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: seffendi at web dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i486-suse-linux
  GCC host triplet: i486-suse-linux
GCC target triplet: i486-suse-linux

Compiling 'busybox-1.00-pre1* I found a compiler bug as stated in 'compiler_fail 
ed_message'. It is caused by the optimization option (-Os). 
 
 
gcc -Wall -c src/dump.c  -I src/include/ -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOUR 
CE -D_FILE_OFFSET_BITS=64 -Wall -Wstrict-prototypes -march=i386 -mpreferred-stac 
k-boundary=2 -falign-functions=0 -falign-jumps=0 -falign-loops=0 -fomit-frame-po 
inter -D_GNU_SOURCE -DNDEBUG -Wshadow -Os --save-temps -v 
 
Reading specs from /usr/lib/gcc-lib/i486-suse-linux/3.3/specs 
Configured with: ../configure --enable-threads=posix --prefix=/usr --with-local- 
prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/us 
r/lib --enable-languages=c,c++,f77,objc,java,ada --disable-checking --enable-lib 
gcj --with-gxx-include-dir=/usr/include/g++ --with-slibdir=/lib --with-system-zl 
ib --enable-shared --enable-__cxa_atexit i486-suse-linux 
Thread model: posix 
gcc version 3.3 20030226 (prerelease) (SuSE Linux) 
 /usr/lib/gcc-lib/i486-suse-linux/3.3/cc1 -E -quiet -v -I src/include/ -D__GNUC_ 
_=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=0 -D_LARGEFILE_SOURCE 
-D_LARGEFILE6 
4_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -DNDEBUG src/dump.c 
-march=i386 -m 
preferred-stack-boundary=2 -Wall -Wall -Wstrict-prototypes -Wshadow -falign-func 
tions=0 -falign-jumps=0 -falign-loops=0 -fomit-frame-pointer -Os dump.i 
#include "..." search starts here: 
#include <...> search starts here: 
 src/include 
 /usr/local/include 
 /usr/lib/gcc-lib/i486-suse-linux/3.3/include 
 /usr/i486-suse-linux/include 
 /usr/include 
End of search list. 
 /usr/lib/gcc-lib/i486-suse-linux/3.3/cc1 -fpreprocessed dump.i -quiet -dumpbase 
 dump.c -march=i386 -mpreferred-stack-boundary=2 -auxbase dump -Os -Wall -Wall - 
Wstrict-prototypes -Wshadow -version -falign-functions=0 -falign-jumps=0 -falign 
-loops=0 -fomit-frame-pointer -o dump.s 
GGC heuristics: --param ggc-min-expand=63 --param ggc-min-heapsize=62211 
GNU C version 3.3 20030226 (prerelease) (SuSE Linux) (i486-suse-linux) 
        compiled by GNU C version 3.3 20030226 (prerelease) (SuSE Linux). 
src/dump.c: In function `rewrite': 
src/dump.c:307: error: unrecognizable insn: 
(insn:HI 1046 915 1047 33 0x404c491c (set (reg:CC 17 flags) 
        (compare:CC (const:SI (plus:SI (symbol_ref:SI ("lcc")) 
                    (const_int 1 [0x1]))) 
            (reg/f:SI 116))) -1 (nil) 
    (expr_list:REG_DEAD (reg/f:SI 116) 
        (nil))) 
src/dump.c:307: internal compiler error: in extract_insn, at recog.c:2175 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.