[Bug tree-optimization/15791] fold misses that two ADDR_EXPR of an arrary obvious not equal

["rguenth at tat dot physik dot uni-tuebingen dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de  2005-01-26 17:24 -------
Hmm, it seems it causes

stage1/xgcc -Bstage1/ -B/usr/local/i686-pc-linux-gnu/bin/ -c   -O2 -g
-fomit-frame-pointer -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros
-Wold-style-definition -Werror -fno-common   -DHAVE_CONFIG_H    -I. -I.
-I/home/rguenth/src/gcc/gcc4.0/gcc -I/home/rguenth/src/gcc/gcc4.0/gcc/.
-I/home/rguenth/src/gcc/gcc4.0/gcc/../include
-I/home/rguenth/src/gcc/gcc4.0/gcc/../libcpp/include 
/home/rguenth/src/gcc/gcc4.0/gcc/ggc-page.c -o ggc-page.o
/home/rguenth/src/gcc/gcc4.0/gcc/ggc-page.c: In function 'ggc_pch_read':
/home/rguenth/src/gcc/gcc4.0/gcc/ggc-page.c:2304: internal compiler error:
Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

#0  0x081da08c in tsi_stmt (i={ptr = 0x0, container = 0x40798d50})
    at /home/rguenth/src/gcc/gcc4.0/gcc/tree-iterator.h:93
#1  0x081da5a6 in bsi_stmt (i=
      {tsi = {ptr = 0x0, container = 0x40798d50}, bb = 0x401d4360})
    at /home/rguenth/src/gcc/gcc4.0/gcc/tree-flow-inline.h:572
#2  0x081cb6b4 in stmt_after_ip_original_pos (cand=0x88104f8, stmt=0x40832a00)
    at /home/rguenth/src/gcc/gcc4.0/gcc/tree-ssa-loop-ivopts.c:613
#3  0x081cb751 in stmt_after_increment (loop=<incomplete type>, 
    cand=0x88104f8, stmt=0x40832a00)
    at /home/rguenth/src/gcc/gcc4.0/gcc/tree-ssa-loop-ivopts.c:635

no time to investigate - maybe an unrelated problem (didn't check if bootstrap
succeeds without patch).

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15791