[Bug target/13722] [3.4/3.5 regression] [ia64] ICE in push_secondary_reload

["schwab at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From schwab at suse dot de  2004-01-23 21:32 -------
Subject: Re: PR 13722 candidate fix

"Zack Weinberg" <zack@codesourcery.com> writes:

> Re-revised patch.

Seems to miscompile the stage2 compiler.

$ stage2/xgcc -Bstage2/ -B/usr/local/ia64-suse-linux/bin/ -c -g -O2      -gnatpg -gnata -I- -I. -Iada -I../../gcc/ada ../../gcc/ada/ada.ads -o ada/ada.o -v
Reading specs from stage2/specs
Configured with: ../configure --host=ia64-suse-linux --enable-shared --enable-threads --with-system-zlib
Thread model: posix
gcc version 3.5.0 20040123 (experimental)
 stage2/gnat1 -I- -I. -Iada -I../../gcc/ada -quiet -dumpbase ada.ads -g -gnatpg -gnata -O2 -gnatO ada/ada.o ../../gcc/ada/ada.ads -o /tmp/ccR0NvnR.s
fatal error, run-time library not installed correctly
cannot locate file system.ads
compilation abandoned

strace shows that gnat1 wants to stat() "" three times, whereas the stage1
compiler searches for "./system.ads", "ada/system.ads",
"../../gcc/ada/system.ads" in that order.  Looking at the contents of the
empty strings shows that they actually point to "\0/system.ads",
"\0\0\0/system.ads" and "\0\0\0\0\0\0\0\0\0\0\0\0\0/system.ads", ie. the
characters before "/system.ads" are replaced by '\0'.

Andreas.



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13722