[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #17 from hjl dot tools at gmail dot com 2009-10-26 16:59 --- Revision 152433 is OK and revision 152642 is bad. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #18 from hjl dot tools at gmail dot com 2009-10-26 19:19 --- This is another IPA-SRA bug. -- hjl dot tools at gmail dot com changed: What|Removed |Added CC||jamborm at gcc dot gnu dot ||org Last reconfirmed|-00-00 00:00:00 |2009-10-26 19:19:42 date|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #12 from rainer at emrich-ebersheim dot de 2009-10-20 18:04 --- First of all, it's nearly impossible to create a short self contained test case, at least for me. The function get_got in bfd/elf64-ia64.c shows the issue. Resolving the dependencies of this function is like opening a can of worms. What I have: I verified that enclosing only the get_got function in #pragma GCC optimize (ipa-sra, no-inline) . . #pragma GCC reset_options yields the fault. In contrast enclosing the get_got function in #pragma GCC optimize (no-ipa-sra, no-inline) . . #pragma GCC reset_options gives a working ia64-unknown-linux-gnu-ld. I'm attaching both versions as preprocessed source. compiling these with gcc -g -O2 -S produces the correspondent assembler output, also attached. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #13 from rainer at emrich-ebersheim dot de 2009-10-20 18:13 --- Created an attachment (id=18841) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18841action=view) preproccessed source no-ipa-sra, no-inline -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #14 from rainer at emrich-ebersheim dot de 2009-10-20 18:14 --- Created an attachment (id=18842) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18842action=view) preproccessed source ipa-sra, no-inline -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #15 from rainer at emrich-ebersheim dot de 2009-10-20 18:15 --- Created an attachment (id=18843) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18843action=view) assembler output -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #16 from rainer at emrich-ebersheim dot de 2009-10-20 18:16 --- Created an attachment (id=18844) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18844action=view) assembler output -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #5 from rainer at emrich-ebersheim dot de 2009-10-19 14:46 --- works when build with -g -O0 and -g -O1. fails when build with -g -O2 and -g -O3. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #6 from jakub at gcc dot gnu dot org 2009-10-19 15:21 --- Try also -g -O2 -fno-strict-aliasing, if that one works, look for aliasing warnings. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #7 from rainer at emrich-ebersheim dot de 2009-10-19 16:08 --- Subject: Re: gcc 4.5.0 miscompiles binutils jakub at gcc dot gnu dot org wrote: --- Comment #6 from jakub at gcc dot gnu dot org 2009-10-19 15:21 --- Try also -g -O2 -fno-strict-aliasing, if that one works, look for aliasing warnings. works when build with -g -O2 -fno-ipa-sra and -g -O3 -fno-ipa-sra. So, that's the easy part. Try to get further. Any help appreciated. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #8 from rainer at emrich-ebersheim dot de 2009-10-19 16:19 --- fails when build with -g -O1 -fipa-sra. So, the ipa-sra pass causes the issue, no? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #9 from rainer at emrich-ebersheim dot de 2009-10-19 16:30 --- build with -g -O1 -fipa-sra -fno-inline I get the following backtrace: Core was generated by `ia64-unknown-linux-gnu-ld --verbose --sysroot=/opt/devel/tec/setup/sys-root/Lin'. Program terminated with signal 11, Segmentation fault. #0 0x0043c3e3 in get_got (abfd=0x711300, info=value optimized out) at elf64-ia64.c:2073 2073 return x-addend y-addend ? -1 : x-addend y-addend ? 1 : 0; (gdb) where #0 0x0043c3e3 in get_got (abfd=0x711300, info=value optimized out) at elf64-ia64.c:2073 #1 0x0043c9bc in elf64_ia64_check_relocs (abfd=value optimized out, info=0x6ead00, sec=value optimized out, relocs=value optimized out) at elf64-ia64.c:2073 #2 0x00459a52 in elf_link_add_object_symbols (abfd=value optimized out, info=value optimized out) at /opt/devel/gnu/src/gcc/binutils-2.20/bfd/elflink.c:477 #3 0x00459e85 in bfd_elf_link_add_symbols (abfd=value optimized out, info=value optimized out) at /opt/devel/gnu/src/gcc/binutils-2.20/bfd/elflink.c:477 #4 0x0040f947 in load_symbols (entry=0x6eb1e0, place=value optimized out) at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldlang.c:353 #5 0x0040fea4 in open_input_bfds (s=0x6eb1e0, force=0) at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldlang.c:353 #6 0x0041217e in lang_process () at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldlang.c:353 #7 0x00414cc0 in main (argc=27, argv=0x7fffa21c0d78) at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldmain.c:1383 (gdb) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #10 from rainer at emrich-ebersheim dot de 2009-10-19 17:06 --- The line numbers in the traceback in comment #9 are completly bogus. I had to upgrade my gdb to version 0.7. Now it looks much better: Core was generated by `ia64-unknown-linux-gnu-ld --verbose --sysroot=/opt/devel/tec/setup/sys-root/Lin'. Program terminated with signal 11, Segmentation fault. #0 get_got (abfd=0x711300, info=value optimized out) at elf64-ia64.c:2418 2418 if (!bfd_set_section_alignment (abfd, got, 3)) (gdb) where #0 get_got (abfd=0x711300, info=value optimized out) at elf64-ia64.c:2418 #1 0x0043c9bc in elf64_ia64_check_relocs (abfd=value optimized out, info=0x6ead00, sec=value optimized out, relocs=value optimized out) at elf64-ia64.c:2973 #2 0x00459a52 in elf_link_add_object_symbols (abfd=value optimized out, info=value optimized out) at /opt/devel/gnu/src/gcc/binutils-2.20/bfd/elflink.c:4774 #3 0x00459e85 in bfd_elf_link_add_symbols (abfd=value optimized out, info=value optimized out) at /opt/devel/gnu/src/gcc/binutils-2.20/bfd/elflink.c:5097 #4 0x0040f947 in load_symbols (entry=0x6eb1e0, place=value optimized out) at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldlang.c:2707 #5 0x0040fea4 in open_input_bfds (s=0x6eb1e0, force=0) at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldlang.c:3138 #6 0x0041217e in lang_process () at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldlang.c:6287 #7 0x00414cc0 in main (argc=27, argv=0x7fffa21c0d78) at /opt/devel/gnu/src/gcc/binutils-2.20/ld/ldmain.c:455 (gdb) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
[Bug middle-end/41750] gcc 4.5.0 miscompiles binutils
--- Comment #11 from rainer at emrich-ebersheim dot de 2009-10-19 17:24 --- verified that compiling only bfd/elf64-ia64.c with -fno-ipa-sra is sufficient to get a working ia64-unknown-linux-gnu-ld. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41750
