With the following c source (foo.i) I have segmentation fault: typedef struct { char n[129]; } A; const A C = { 0, 0 }; extern const A *const B; void bar(const char *); void foo () { bar (B->n); } const A *const B = &C; Command line: *gcc -c -O2 -o foo.i foo.c Output: foo.i: In function `foo': foo.i:16: internal compiler error: Segmentation fault
I can't seem to reproduce this on my x86 linux box with a snapshot from 2004-07-21. What is your version? And do you mean that you reproduced this bug on all the platforms you listed, i.e. arm-unknown-elf i386-unknown-elf m68k-unknown-elf mips-unknown- W.
(In reply to comment #1) > I can't seem to reproduce this on my x86 linux box with a snapshot from > 2004-07-21. What is your version? And do you mean that you reproduced > this bug on all the platforms you listed, i.e. > arm-unknown-elf i386-unknown-elf m68k-unknown-elf mips-unknown- Sorry, I forgot to write down the following: Last known to work: 3.5.0 (2004-07-22 12:00:00 UTC) First known to fail: 3.5.0 (2004-07-23 12:00:00 UTC) Last known to fail: 3.5.0 (2004-07-25 12:00:00 UTC)
Confirmed, here is the backtrace (I compiled with c++ for some reason but it does not matter): #0 note_addressable (var=Variable "var" is not available. ) at /home/gates/pinskia/src/gnu/gcc/src/gcc/tree-ssa-operands.c:1434 #1 0x081e1259 in add_stmt_operand (var_p=0x4004f1ac, stmt=0x4004f18c, flags=0, prev_vops=0x0) at /home/gates/pinskia/src/gnu/gcc/src/gcc/tree-ssa-operands.c:1303 #2 0x081e1b37 in get_expr_operands (stmt=0x4004f18c, expr_p=0x4004f1ac, flags=0, prev_vops=0xbffebe70) at /home/gates/pinskia/src/gnu/gcc/src/gcc/tree-ssa-operands.c:859 #3 0x081e3789 in get_stmt_operands (stmt=0x4004f18c) at /home/gates/pinskia/src/gnu/gcc/src/ gcc/tree-ssa-operands.c:758 #4 0x0819c970 in mark_new_vars_to_rename (stmt=0x4004f18c, vars_to_rename=0x869a090) at / home/gates/pinskia/src/gnu/gcc/src/gcc/tree-dfa.c:1051 #5 0x081d12d0 in tree_ssa_ccp () at /home/gates/pinskia/src/gnu/gcc/src/gcc/tree-ssa-ccp.c:435 #6 0x081a6132 in execute_pass_list (pass=0x85f1900) at /home/gates/pinskia/src/gnu/gcc/src/gcc/ tree-optimize.c:446 #7 0x081a6145 in execute_pass_list (pass=0x85f1700) at /home/gates/pinskia/src/gnu/gcc/src/gcc/ tree-optimize.c:472 #8 0x081a6332 in tree_rest_of_compilation (fndecl=0x4010715c, nested_p=0 '\0') at /home/gates/ pinskia/src/gnu/gcc/src/gcc/tree-optimize.c:547 #9 0x08128e88 in expand_body (fn=0x4010715c) at /home/gates/pinskia/src/gnu/gcc/src/gcc/cp/ semantics.c:2889 #10 0x084af668 in cgraph_expand_function (node=0x401076cc) at /home/gates/pinskia/src/gnu/ gcc/src/gcc/cgraphunit.c:797 #11 0x084b10bb in cgraph_optimize () at /home/gates/pinskia/src/gnu/gcc/src/gcc/cgraphunit.c: 1669 #12 0x080d4c5c in finish_file () at /home/gates/pinskia/src/gnu/gcc/src/gcc/cp/decl2.c:2877 #13 0x0817d1fa in c_common_parse_file (set_yydebug=0) at /home/gates/pinskia/src/gnu/gcc/src/ gcc/c-opts.c:1087 #14 0x0845dbde in toplev_main (argc=0, argv=0xbffec2a4) at /home/gates/pinskia/src/gnu/gcc/src/ gcc/toplev.c:981 #15 0x420174d9 in __libc_start_main () from /lib/i686/libc.so.6 #16 0x08049b31 in _start ()
May be related to a similar failure that echristo found last week. Eric, does your fix address this problem? Diego.
Yeah. My patch fixes it. I'll take this until I can commit. Thanks.
Fixed with: 2004-07-26 Eric Christopher <echristo@redhat.com> * tree-dfa.c (add_referenced_var): Register initializers of global variables.