[Bug tree-optimization/39978] New: [4.5 Regression] SEGV compiling libiberty/regex.c in stage2

["danglin at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

if [ x"-fPIC" != x ]; then \
          /home/dave/gnu/gcc/objdir/./prev-gcc/xgcc
-B/home/dave/gnu/gcc/objdir/./prev-gcc/
-B/home/dave/opt/gnu/gcc/gcc-4.5.0/arm-none-linux-gnueabi/bin/ -c
-DHAVE_CONFIG_H -g -O2 -I/home/dave/opt/gnu/include -I.
-I../../gcc/libiberty/../include  -W -Wall -Wwrite-strings -Wc++-compat
-Wstrict-prototypes -pedantic  -fPIC ../../gcc/libiberty/regex.c -o
pic/regex.o; \
        else true; fi
In file included from ../../gcc/libiberty/regex.c:638:
../../gcc/libiberty/regex.c: In function 'byte_re_compile_fastmap':
../../gcc/libiberty/regex.c:4541: internal compiler error: Segmentation fault

Performing interprocedural optimizations
 <visibility> <early_local_cleanups> {GC 5739k -> 2977k} <summary generate>
<cp> <inline> <static-var> <pure-const>Assembling functions:
 byte_compile_range byte_common_op_match_null_string_p
byte_alt_match_null_string_p byte_group_match_null_string_p xre_set_syntax
xre_set_registers xregfree xregerror byte_regex_compile {GC 5405k -> 3470k}
xre_comp xre_compile_pattern byte_re_compile_fastmap {GC 5325k ->
Program received signal SIGSEGV, Segmentation fault.
0x002c5398 in lookup_page_table_entry (p=0xafafafaf)
    at ../../gcc/gcc/ggc-page.c:588
588       return base[L1][L2];
(gdb) bt
#0  0x002c5398 in lookup_page_table_entry (p=0xafafafaf)
    at ../../gcc/gcc/ggc-page.c:588
#1  0x002c6294 in ggc_set_mark (p=0xafafafaf) at ../../gcc/gcc/ggc-page.c:1318
#2  0x0092fe80 in gt_ggc_mx_basic_block_def (x_p=0x404c3a78)
    at gtype-desc.c:859
#3  0x00930558 in gt_ggc_mx_gimple_statement_d (x_p=0x404c3a50)
    at gtype-desc.c:990
#4  0x00930228 in gt_ggc_mx_gimple_seq_node_d (x_p=0x4069c6b0)
    at gtype-desc.c:931
#5  0x00930310 in gt_ggc_mx_gimple_seq_d (x_p=0x40593770) at gtype-desc.c:947
#6  0x0092e094 in gt_ggc_mx_gimple_bb_info (x_p=0x40702ef8) at gtype-desc.c:269
#7  0x0092ffe0 in gt_ggc_mx_basic_block_def (x_p=0x40731740)
    at gtype-desc.c:879
#8  0x0092e89c in gt_ggc_mx_control_flow_graph (x_p=0x406b03b8)
    at gtype-desc.c:411
#9  0x0092f7b8 in gt_ggc_mx_function (x_p=0x4069ba50) at gtype-desc.c:732
#10 0x000dab18 in gt_ggc_mx_lang_tree_node (x_p=0x4021c2a0)
    at ./gt-c-decl.h:349
#11 0x000dad44 in gt_ggc_mx_lang_tree_node (x_p=0x402163f0)
    at ./gt-c-decl.h:376
#12 0x000dabbc in gt_ggc_mx_lang_tree_node (x_p=0x40216460)
    at ./gt-c-decl.h:356
#13 0x000dabbc in gt_ggc_mx_lang_tree_node (x_p=0x406b1150)
---Type <return> to continue, or q <return> to quit---
    at ./gt-c-decl.h:356
#14 0x000da918 in gt_ggc_mx_lang_tree_node (x_p=0x40772c80)
    at ./gt-c-decl.h:333
#15 0x0092ddc4 in gt_ggc_mx_cgraph_node (x_p=0x405ad800) at gtype-desc.c:229
#16 0x00934c34 in gt_ggc_m_P11cgraph_node4htab (x_p=0x401fae80)
    at gtype-desc.c:2147
#17 0x00827b88 in ggc_mark_roots () at ../../gcc/gcc/ggc-common.c:107
#18 0x002c7660 in ggc_collect () at ../../gcc/gcc/ggc-page.c:1941
#19 0x00b813ac in execute_todo (flags=2055) at ../../gcc/gcc/passes.c:1059
#20 0x00b81e74 in execute_one_pass (pass=0x2a6b690)
    at ../../gcc/gcc/passes.c:1314
#21 0x00b81fdc in execute_pass_list (pass=0x2a6b690)
    at ../../gcc/gcc/passes.c:1340
#22 0x00b82008 in execute_pass_list (pass=0x29b2db0)
    at ../../gcc/gcc/passes.c:1341
#23 0x01212bc0 in tree_rest_of_compilation (fndecl=0x403be000)
    at ../../gcc/gcc/tree-optimize.c:394
#24 0x01cdb6d0 in cgraph_expand_function (node=0x405ad400)
    at ../../gcc/gcc/cgraphunit.c:1051
#25 0x01cdb920 in cgraph_expand_all_functions ()
    at ../../gcc/gcc/cgraphunit.c:1110
#26 0x01cdc040 in cgraph_optimize () at ../../gcc/gcc/cgraphunit.c:1324
#27 0x000d896c in c_write_global_declarations () at ../../gcc/gcc/c-decl.c:8306

This is with

-bash-3.2$ ./xgcc -B./ -v
Reading specs from ./specs
Target: arm-none-linux-gnueabi
Configured with: ../gcc/configure --host=arm-none-linux-gnueabi
--target=arm-none-linux-gnueabi --build=arm-none-linux-gnueabi
--enable-languages=c,c++,fortran --enable-shared --enable-threads
--disable-multilib --disable-libmudflap --disable-libssp --enable-symvers=gnu
--enable-__cxa_atexit --disable-libstdcxx-pch
--prefix=/home/dave/opt/gnu/gcc/gcc-4.5.0 --with-gmp=/home/dave/opt/gnu
Thread model: posix
gcc version 4.5.0 20090429 (experimental) [trunk revision 146971] (GCC)


-- 
           Summary: [4.5 Regression] SEGV compiling libiberty/regex.c in
                    stage2
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: danglin at gcc dot gnu dot org
 GCC build triplet: arm-none-linux-gnueabi
  GCC host triplet: arm-none-linux-gnueabi
GCC target triplet: arm-none-linux-gnueabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39978