[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #27 from hjl at gcc dot gnu.org hjl at gcc dot gnu.org 2011-01-10 13:24:30 UTC --- Author: hjl Date: Mon Jan 10 13:24:27 2011 New Revision: 168631 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=168631 Log: Check e-call_stmt before calling gimple_call_set_cannot_inline. 2011-01-10 H.J. Lu hongjiu...@intel.com PR lto/46760 * tree-inline.c (tree_can_inline_p): Check e-call_stmt before calling gimple_call_set_cannot_inline. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-inline.c
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added Status|REOPENED|RESOLVED Resolution||FIXED Target Milestone|--- |4.6.0 --- Comment #28 from H.J. Lu hjl.tools at gmail dot com 2011-01-10 13:27:11 UTC --- Fixed.
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #29 from Jan Hubicka hubicka at gcc dot gnu.org 2011-01-10 13:44:00 UTC --- H.J., since you run regular testing, do you think you could switch one of tester into lto-bootstrap (or ideally lto-bootstrap with FDO) so we keep those in good condition? Thanks! Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #30 from H.J. Lu hjl.tools at gmail dot com 2011-01-10 13:48:27 UTC --- (In reply to comment #29) H.J., since you run regular testing, do you think you could switch one of tester into lto-bootstrap (or ideally lto-bootstrap with FDO) so we keep those in good condition? Thanks! I have been testing lto-bootstrap: http://gcc.gnu.org/ml/gcc-testresults/2011-01/msg00750.html I will try to start lto-bootstrap with FDO.
Re: [Bug driver/46760] LTO bootstrap doesn't work with FDO
I have been testing lto-bootstrap: http://gcc.gnu.org/ml/gcc-testresults/2011-01/msg00750.html I will try to start lto-bootstrap with FDO. Great, thanks! The FDO bootstrap always suffered from lack of testing, so this should help. Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #31 from Jan Hubicka hubicka at ucw dot cz 2011-01-10 13:51:02 UTC --- I have been testing lto-bootstrap: http://gcc.gnu.org/ml/gcc-testresults/2011-01/msg00750.html I will try to start lto-bootstrap with FDO. Great, thanks! The FDO bootstrap always suffered from lack of testing, so this should help. Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #32 from H.J. Lu hjl.tools at gmail dot com 2011-01-10 13:59:32 UTC --- (In reply to comment #31) I have been testing lto-bootstrap: http://gcc.gnu.org/ml/gcc-testresults/2011-01/msg00750.html I will try to start lto-bootstrap with FDO. Great, thanks! The FDO bootstrap always suffered from lack of testing, so this should help. Honza I have been testing FDO bootstrap: http://gcc.gnu.org/ml/gcc-testresults/2011-01/msg00765.html I just need to start lto-bootstrap with FDO.
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 Jan Hubicka hubicka at gcc dot gnu.org changed: What|Removed |Added Status|NEW |RESOLVED Resolution||FIXED --- Comment #19 from Jan Hubicka hubicka at gcc dot gnu.org 2011-01-09 18:27:52 UTC --- it works for me now.
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added Status|RESOLVED|REOPENED Resolution|FIXED | --- Comment #20 from H.J. Lu hjl.tools at gmail dot com 2011-01-09 22:02:10 UTC --- On my Intel64 machine with 6GB RAM and 12GB swap, revision 168617 failed at final link: lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc returned 1 exit status /usr/local/bin/ld: lto-wrapper failed collect2: ld returned 1 exit status make[5]: *** [lto1] Error 1 make[5]: *** Waiting for unfinished jobs lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc returned 1 exit status /usr/local/bin/ld: lto-wrapper failed collect2: ld returned 1 exit status make[5]: *** [cc1obj] Error 1 lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc returned 1 exit status /usr/local/bin/ld: lto-wrapper failed collect2: ld returned 1 exit status make[5]: *** [jc1] Error 1 lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc returned 1 exit status /usr/local/bin/ld: lto-wrapper failed collect2: ld returned 1 exit status make[5]: *** [cc1] Error 1 lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc returned 1 exit status /usr/local/bin/ld: lto-wrapper failed collect2: ld returned 1 exit status make[5]: *** [cc1plus] Error 1 lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc returned 1 exit status /usr/local/bin/ld: lto-wrapper failed collect2: ld returned 1 exit status make[5]: *** [f951] Error 1 rm gcj-dbtool.pod jcf-dump.pod cpp.pod jv-convert.pod grmic.pod gcov.pod gcj.pod gc-analyze.pod gfdl.pod gij.pod gcc.pod gfortran.pod fsf-funding.pod make[5]: Leaving directory `/export/build/gnu/gcc-lto/build-x86_64-linux/gcc' make[4]: *** [all-stagefeedback-gcc] Error 2 make[4]: Leaving directory `/export/build/gnu/gcc-lto/build-x86_64-linux' make[3]: *** [stagefeedback-bubble] Error 2 make[3]: Leaving directory `/export/build/gnu/gcc-lto/build-x86_64-linux' make[2]: *** [profiledbootstrap] Error 2 make[2]: Leaving directory `/export/build/gnu/gcc-lto/build-x86_64-linux' GCC configured with /export/gnu/import/git/gcc/configure --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --prefix=/usr/gcc-4.6.0 --with-local-prefix=/usr/local --with-fpmath=sse --with-build-config=bootstrap-lto
Re: [Bug driver/46760] LTO bootstrap doesn't work with FDO
lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc What is the backtrace here? I built working profiledbootsrap LTO compiler with various cofigurations already (both GNU ld and gold) w/o problems I will try with current tree. Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #21 from Jan Hubicka hubicka at ucw dot cz 2011-01-09 22:07:59 UTC --- lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. lto-wrapper: /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc What is the backtrace here? I built working profiledbootsrap LTO compiler with various cofigurations already (both GNU ld and gold) w/o problems I will try with current tree. Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760
--- Comment #22 from H.J. Lu hjl.tools at gmail dot com 2011-01-10 00:01:45
UTC ---
Program received signal SIGSEGV, Segmentation fault.
tree_can_inline_p (e=0x7fffdaf9fd68)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:5391
5391 gimple_call_set_cannot_inline (e-call_stmt, true);
Missing separate debuginfos, use: debuginfo-install
cloog-ppl-0.15.8-1.0.f12.x86_64 glibc-2.12.90-21.2.f14.x86_64
gmp-4.3.2-0.0.f13.x86_64 libgcc-4.5.1-4.fc14.x86_64 libmpc-0.8.1-1.0.f12.x86_64
libstdc++-4.5.1-4.fc14.x86_64 mpfr-2.4.2-1.0.f12.x86_64
ppl-0.10.2-10.fc12.x86_64 zlib-1.2.5-2.fc14.x86_64
(gdb) bt
#0 tree_can_inline_p (e=0x7fffdaf9fd68)
at /export/gnu/import/git/gcc/gcc/tree-inline.c:5391
#1 0x00a5653a in cgraph_decide_inlining_of_small_functions ()
at /export/gnu/import/git/gcc/gcc/ipa-inline.c:1177
#2 0x00a585b7 in cgraph_decide_inlining ()
at /export/gnu/import/git/gcc/gcc/ipa-inline.c:1479
#3 0x00e65b52 in execute_one_pass (pass=0x1947960)
at /export/gnu/import/git/gcc/gcc/passes.c:1553
#4 0x00e6626a in execute_ipa_pass_list (pass=0x1947960)
at /export/gnu/import/git/gcc/gcc/passes.c:1920
#5 0x00e665e6 in do_whole_program_analysis ()
at /export/gnu/import/git/gcc/gcc/lto/lto.c:2334
#6 0x00ebab88 in lto_main ()
at /export/gnu/import/git/gcc/gcc/lto/lto.c:2446
#7 0x0071730d in compile_file ()
at /export/gnu/import/git/gcc/gcc/toplev.c:579
#8 do_compile () at /export/gnu/import/git/gcc/gcc/toplev.c:1874
#9 0x007189e5 in toplev_main (argc=405, argv=0x1e44a00)
at /export/gnu/import/git/gcc/gcc/toplev.c:1937
#10 0x004a5040 in main (argc=35, argv=0x7fffdc08)
at /export/gnu/import/git/gcc/gcc/main.c:36
(gdb) list
5386
5387 /* Allow the backend to decide if inlining is ok. */
5388 if (!targetm.target_option.can_inline_p (caller, callee))
5389{
5390 e-inline_failed = CIF_TARGET_OPTION_MISMATCH;
5391 gimple_call_set_cannot_inline (e-call_stmt, true);
5392 e-call_stmt_cannot_inline_p = true;
5393 return false;
5394}
5395
(gdb) p e
$1 = (struct cgraph_edge *) 0x7fffdaf9fd68
(gdb) p e-call_stmt
$2 = (union gimple_statement_d *) 0x0
(gdb)
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760
--- Comment #23 from Jan Hubicka hubicka at ucw dot cz 2011-01-10 00:21:35
UTC ---
5386
5387 /* Allow the backend to decide if inlining is ok. */
5388 if (!targetm.target_option.can_inline_p (caller, callee))
5389{
5390 e-inline_failed = CIF_TARGET_OPTION_MISMATCH;
5391 gimple_call_set_cannot_inline (e-call_stmt, true);
5392 e-call_stmt_cannot_inline_p = true;
5393 return false;
5394}
5395
(gdb) p e
$1 = (struct cgraph_edge *) 0x7fffdaf9fd68
(gdb) p e-call_stmt
$2 = (union gimple_statement_d *) 0x0
(gdb)
Obviously we can not set gimple_call_set_cannot_inline when call_stmt is
missing.
I guess just guardining the set with
if (e-call_stmt)
gimple_call_set_cannot_inline (e-call_stmt, true);
in all occurences in the function should fix the issue. Consider it preaproved
if it helps. In 4.7 we probably should drop the gimple_call_set_cannot_inline
calls completely, I don't see any value in them.
Can you do dump_cgraph_node (stderr, e-caller) and dump_cgraph_node (stderr,
e-callee)?? I think we should decide function to be uninlinable only in
presence of target optimization attributes and I can not think of any during
the bootstrap
Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #24 from H.J. Lu hjl.tools at gmail dot com 2011-01-10 01:24:13 UTC --- (gdb) call dump_cgraph_node (stderr, e-caller) _cpp_clean_line/47583(-1) @0x7fffdaf97b00 (asm: _cpp_clean_line) availability:available analyzed executed 136036096x 107 time, 14 benefit 186 size, 7 benefit (204 after inlining) needed reachable externally_visible prevailing_def finalized inlinable called by: cpp_pop_definition/47256 (1.00 per call) destringize_and_run/47257 (1.00 per call) run_directive/47259 (2130530x) (1.00 per call) builtin_macro/47693 (97x) (1.00 per call) paste_tokens/47699 (450825x) (1.00 per call) cpp_read_state/47816 (1.00 per call) _cpp_skip_block_comment/47586 (19682217x) (0.93 per call) _cpp_get_fresh_line.part.5/47584 (113774079x) (1.00 per call) calls: add_line_note/38510 (inlined) (136036096x) (1.00 per call) add_line_note/47567 (nested in 1 loops) add_line_note/47567 (8317015x) (0.06 per call) (nested in 1 loops) add_line_note/47567 (2018574x) (0.01 per call) __builtin_expect/2426 (133456296x) (0.98 per call) __builtin_expect/2426 (133456296x) (0.98 per call) __builtin_expect/2426 (133456296x) (0.98 per call) add_line_note/47567 (nested in 1 loops) __builtin_expect/2426 (319549x) (0.00 per call) (nested in 1 loops) __builtin_expect/2426 (133775845x) (0.98 per call) (nested in 1 loops) search_line_sse42/47576 (136174844x) (1.00 per call) (nested in 1 loops) References: var:search_line_fast (read) fn:search_line_sse42/47576 (addr) var:_cpp_trigraph_map (read) var:_cpp_trigraph_map (read) var:_sch_istable (read) var:_sch_istable (read) var:_cpp_trigraph_map (read) var:_cpp_trigraph_map (read) Refering this function: has 1 outgoing edges for indirect calls. (gdb) call dump_cgraph_node (stderr, e-callee) search_line_sse42/47576(-1) @0x7fffdaf97160 (asm: search_line_sse42.762190) availability:available analyzed executed 136174844x 18 time, 15 benefit 30 size, 7 benefit address_taken prevailing_def_ironly finalized inlinable called by: _cpp_clean_line/47583 (136174844x) (1.00 per call) calls: __builtin_expect/2426 (127407932x) (0.94 per call) search_line_sse2/47575 (1039x) __builtin_expect/2426 (142096x) (0.00 per call) __builtin_expect/2426 (127408971x) (0.94 per call) References: Refering this function: fn:init_vectorized_lexer/47582 (addr) fn:_cpp_clean_line/47583 (addr) (gdb)
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #25 from H.J. Lu hjl.tools at gmail dot com 2011-01-10 01:25:00 UTC --- My machine supports SSE4.
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #26 from Jan Hubicka hubicka at ucw dot cz 2011-01-10 01:42:06 UTC --- call) (nested in 1 loops) search_line_sse42/47576 (136174844x) (1.00 per call) Ahh, that is the Andi's vectorized preprocessor code. That is fine then Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 Jan Hubicka hubicka at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|WAITING --- Comment #16 from Jan Hubicka hubicka at gcc dot gnu.org 2010-12-05 14:28:29 UTC --- Bootstrap works for me with current mainline with release checking as well as default checking, configured as: ../configure --enable-stage1-languages=c,lto --with-ld=/abuild/jh/trunk-install/bin/ld --with-build-config=bootstrap-lto --enable-checking=release --disable-plugin Can you, please, re-confirm the bug or close the PR?
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added Status|WAITING |NEW --- Comment #17 from H.J. Lu hjl.tools at gmail dot com 2010-12-05 17:16:53 UTC --- (In reply to comment #16) Bootstrap works for me with current mainline with release checking as well as default checking, configured as: ../configure --enable-stage1-languages=c,lto --with-ld=/abuild/jh/trunk-install/bin/ld --with-build-config=bootstrap-lto --enable-checking=release --disable-plugin ^ Can you try without disabling plugin? I am using. --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --enable-langua ges=c,lto --prefix=/usr/gcc-4.6.0 --with-local-prefix=/usr/local --with-fpmath= sse --with-build-config=bootstrap-lto
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #18 from Jan Hubicka hubicka at gcc dot gnu.org 2010-12-05 19:04:38 UTC --- I tried with the default checking earlier (this is not LTO plugin, just the plugin support that does not cause that much of difference). I will try tonight or after I return from trip.
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #10 from H.J. Lu hjl.tools at gmail dot com 2010-12-04 17:04:34 UTC --- (In reply to comment #9) Created attachment 22604 [details] Patch I am testing to allow profile merging This patch should allow merging of LTO units with different number of executions. I am testing how far I can get with lto bootstrap with this one and the pass-through I got lto1: internal compiler error: Floating point exception Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. Do we have a divide by zero bug?
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #11 from H.J. Lu hjl.tools at gmail dot com 2010-12-04 17:13:57 UTC --- Program received signal SIGFPE, Arithmetic exception. 0x00f6e670 in merge_profile_summaries () at /export/gnu/import/git/gcc/gcc/lto-cgraph.c:1513 1513/ node-local.lto_file_data-profile_info.run_max);
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760
--- Comment #12 from H.J. Lu hjl.tools at gmail dot com 2010-12-04 17:24:28
UTC ---
(gdb) p cgraph_nodes-local.lto_file_data-profile_info
$4 = {num = 0, runs = 9409, sum_all = 0, run_max = 0, sum_max = 1302797449}
(gdb)
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 Jan Hubicka hubicka at gcc dot gnu.org changed: What|Removed |Added CC||hubicka at gcc dot gnu.org --- Comment #13 from Jan Hubicka hubicka at gcc dot gnu.org 2010-12-04 17:33:02 UTC --- I fixed that division bug (it is wrong way) and I can bootstrap C only, C++ still fails, this time on profile mismatches. I will commit the fixed patch. Honza
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #14 from Jan Hubicka hubicka at gcc dot gnu.org 2010-12-04 19:35:27 UTC --- Author: hubicka Date: Sat Dec 4 19:35:23 2010 New Revision: 167458 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=167458 Log: PR tree-optimization/46760 * cgraph.c (cgraph_create_node): Initialize count_materialization_scale. * cgraph.h (struct cgraph_node): Add count_materialization_scale. * lto-cgraph.c (lto_output_edge): Fix assert. (lto_output_node): Output count_materialization_scale. (output_profile_summary): Output only runs and sum_max. (input_node): Input count_materialization_scale. (input_profile_summary): Read data into file specific gcov summary. (merge_profile_summaries): New function. (input_cgraph): Update call of input_profile_summary; call merge_profile_summaries. * lto-streamer-in.c (input_cfg): Add count_materialization_scale arg; rescale counts at read in. (intput_bb): Likewise. (input_function): Update call of input_bb. (lto_read_body): Update call of input_cfg. * lto-streamer.h: Inlclude gcov-io.h (lto_file_decl_data): Add gcov_ctr_summary. Modified: trunk/gcc/ChangeLog trunk/gcc/cgraph.c trunk/gcc/cgraph.h trunk/gcc/lto-cgraph.c trunk/gcc/lto-streamer-in.c trunk/gcc/lto-streamer.h
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #15 from H.J. Lu hjl.tools at gmail dot com 2010-12-05 00:51:39 UTC --- With revision 167460, I got [...@gnu-18 gcc]$ /export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/xgcc -B/export/build/gnu/gcc-lto/build-x86_64-linux/./prev-gcc/ -B/usr/gcc-4.6.0/x86_64-unknown-linux-gnu/bin/ -B/usr/gcc-4.6.0/x86_64-unknown-linux-gnu/bin/ -B/usr/gcc-4.6.0/x86_64-unknown-linux-gnu/lib/ -isystem /usr/gcc-4.6.0/x86_64-unknown-linux-gnu/include -isystem /usr/gcc-4.6.0/x86_64-unknown-linux-gnu/sys-include -g -O2 -flto=jobserver -fuse-linker-plugin -frandom-seed=1 -fprofile-use -DIN_GCC -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common -DHAVE_CONFIG_H -DGENERATOR_FILE -static-libstdc++ -static-libgcc -o build/genchecksum build/genchecksum.o .././libiberty/libiberty.a In function \u2018md5_process_block\u2019: lto1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. make: *** [/tmp/cc1Nc0QJ.ltrans0.ltrans.o] Error 1 lto-wrapper: make returned 2 exit status lto-wrapper failedcollect2: ld returned 1 exit status [...@gnu-18 gcc]$
[Bug driver/46760] LTO bootstrap doesn't work with FDO
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46760 --- Comment #9 from Jan Hubicka hubicka at gcc dot gnu.org 2010-12-02 15:57:00 UTC --- Created attachment 22604 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=22604 Patch I am testing to allow profile merging This patch should allow merging of LTO units with different number of executions. I am testing how far I can get with lto bootstrap with this one and the pass-through
