[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858 --- Comment #29 from Ulrich Weigand uweigand at gcc dot gnu.org 2011-05-02 14:06:52 UTC --- Author: uweigand Date: Mon May 2 14:06:48 2011 New Revision: 173252 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=173252 Log: 2011-05-02 Ulrich Weigand ulrich.weig...@linaro.org PR middle-end/43085 Backport from mainline: 2010-04-29 Bernd Schmidt ber...@codesourcery.com From Dominique d'Humieres domi...@lps.ens.fr PR bootstrap/43858 * ifcvt.c (dead_or_predicable): Use df_simulate_find_defs to compute test_set. 2010-04-26 Bernd Schmidt ber...@codesourcery.com * df-problems.c (df_simulate_initialize_forwards): Set, don't clear, bits for artificial defs at the top of the block. * fwprop.c (single_def_use_enter_block): Don't call it. 2010-04-22 Bernd Schmidt ber...@codesourcery.com * ifcvt.c (dead_or_predicable): Use df_simulate_find_defs and df_simulate_find_noclobber_defs as appropriate. Keep track of an extra set merge_set_noclobber, and use it to relax the final test slightly. * df.h (df_simulate_find_noclobber_defs): Declare. * df-problems.c (df_simulate_find_defs): Don't ignore partial or conditional defs. (df_simulate_find_noclobber_defs): New function. Modified: branches/gcc-4_5-branch/gcc/ChangeLog branches/gcc-4_5-branch/gcc/df-problems.c branches/gcc-4_5-branch/gcc/df.h branches/gcc-4_5-branch/gcc/fwprop.c branches/gcc-4_5-branch/gcc/ifcvt.c
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #27 from bernds at gcc dot gnu dot org 2010-04-29 11:04 --- Subject: Bug 43858 Author: bernds Date: Thu Apr 29 11:04:30 2010 New Revision: 158898 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=158898 Log: From Dominique d'Humieres domi...@lps.ens.fr PR bootstrap/43858 * ifcvt.c (dead_or_predicable): Use df_simulate_find_defs to compute test_set. Modified: trunk/gcc/ChangeLog trunk/gcc/ifcvt.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #28 from rguenth at gcc dot gnu dot org 2010-04-29 15:11 --- Fixed. -- rguenth at gcc dot gnu dot org changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution||FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #19 from dominiq at lps dot ens dot fr 2010-04-28 08:50 --- Two questions - are you sure you didn't reverse the _w and _f files (i.e. maybe _f is the working version and _w the failing one)? I have looked at how I have generated the archive and I don't think so. I'll double-check later today. Are you sure this isn't a problem with your 4.0.1 bootstrap compiler? How can anyone be sure!-(however this does not seem consistent with the fact that the all the object files, but ifcvt.o, have the same size (is there a way to make a deeper comparison?) and also the regress bot is still failing to bootstrap (see pointer in comment #0) while using a different config (but probably the same gcc). Can you try building a different working gcc (e.g. from the 4.5 branch), and bootstrapping with that? I'll try to have a look later today. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #20 from dominiq at lps dot ens dot fr 2010-04-28 08:54 --- I have forgotten to ask my question! Could it be a similar issue to that you fixed for pr42220? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #21 from dominiq at lps dot ens dot fr 2010-04-28 13:19 --- Two questions - are you sure you didn't reverse the _w and _f files (i.e. maybe _f is the working version and _w the failing one)? I have double checked and I confirm that the *_f.* files are coming from the failing bootstrap. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #22 from bernds at codesourcery dot com 2010-04-28 13:59 --- (In reply to comment #20) I have forgotten to ask my question! Could it be a similar issue to that you fixed for pr42220? No, that looks completely unrelated at first glance. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #23 from howarth at nitro dot med dot uc dot edu 2010-04-28 16:50 --- Dominique, Are you saying you regression hunted and this was triggered by... Author: bernds Date: Thu Apr 22 11:47:52 2010 New Revision: 158643 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=158643 Log: * optabs.h (expand_widening_mult): Declare. Modified: trunk/gcc/ChangeLog trunk/gcc/optabs.h -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #24 from dominiq at lps dot ens dot fr 2010-04-28 17:07 --- Are you saying you regression hunted and this was triggered by... Author: bernds Date: Thu Apr 22 11:47:52 2010 New Revision: 158643 No. If you read the thread, it was due to revision 158639 (see comment #6). However in order to reach this conclusion, you need to apply revision 158643 in order to fix a previous bootstrap failure. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #25 from dominiq at lps dot ens dot fr 2010-04-28 19:27 ---
The following change applied on top of revision 158827 is enough to reach stage
3 (and probably to bootstrap -answer tomorrow):
--- ../_gcc_clean/gcc/ifcvt.c 2010-04-22 13:23:31.0 +0200
+++ ../gcc-4.6-work/gcc/ifcvt.c 2010-04-28 16:55:01.0 +0200
@@ -4083,7 +4083,7 @@ dead_or_predicable (basic_block test_bb,
{
if (INSN_P (insn))
{
- df_simulate_find_noclobber_defs (insn, test_set);
+ df_simulate_find_defs (insn, test_set);
df_simulate_one_insn_backwards (test_bb, insn, test_live);
}
prev = PREV_INSN (insn);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #26 from bernds at codesourcery dot com 2010-04-28 19:33 --- Ah! I think that makes sense. For some reason I only looked at the other use of df_simulate_find_noclobber_defs. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #14 from dominiq at lps dot ens dot fr 2010-04-27 09:38 --- If the testsuite run produces nothing, can you check the object files of the two stage2 compilers (working and broken) for differences in code generation? That could help narrow down which file is being miscompiled. Results of the gcc testsuite after stage1 with the original ifcvt.c file: FAIL: gcc.dg/debug/dwarf2/aranges-fnsec-1.c scan-assembler DW_AT_ranges FAIL: gcc.dg/and-1.c scan-assembler-not nand FAIL: gcc.dg/plugindir1.c (test for excess errors) FAIL: gcc.dg/plugindir2.c (test for excess errors) FAIL: gcc.dg/plugindir3.c (test for excess errors) FAIL: gcc.dg/plugindir4.c (test for excess errors) FAIL: gcc.dg/pr34668-1.c (internal compiler error) FAIL: gcc.dg/pr34668-1.c (test for excess errors) FAIL: gcc.dg/pragma-darwin.c (test for excess errors) FAIL: gcc.dg/sms-2.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-3.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-4.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-5.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-6.c scan-rtl-dump-times sms SMS succeeded 3 FAIL: gcc.dg/sms-7.c scan-rtl-dump-times sms SMS succeeded 3 FAIL: gcc.dg/sms-8.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/tree-ssa/pr42585.c scan-tree-dump-times optimized struct _fat_ptr _ans 0 FAIL: gcc.dg/tree-ssa/pr42585.c scan-tree-dump-times optimized struct _fat_ptr _T2 0 FAIL: gcc.dg/tree-ssa/vrp47.c scan-tree-dump-times vrp1 [xy][^ ]* != 0 FAIL: gcc.dg/tree-ssa/vrp47.c scan-tree-dump-times dom1 x[^ ]* y 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-31d.c scan-tree-dump-times vect vectorization not profitable 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-68d.c scan-tree-dump-times vect vectorization not profitable 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-76a.c scan-tree-dump-times vect vectorized 1 loops 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c scan-tree-dump-times vect vectorization not profitable 1 FAIL: gcc.dg/vect/pr35821-altivec.c scan-tree-dump-times vect vectorized 1 loops 1 FAIL: gcc.dg/vect/section-anchors-pr27770.c (test for excess errors) FAIL: gcc.dg/vect/section-anchors-vect-69.c (test for excess errors) FAIL: gcc.dg/vect/section-anchors-vect-69.c scan-tree-dump-times vect Alignment of access forced using peeling 4 FAIL: gcc.dg/vect/aligned-section-anchors-nest-1.c (test for excess errors) FAIL: gcc.dg/vect/aligned-section-anchors-nest-1.c scan-ipa-dump-times increase_alignment Increasing alignment of decl 3: dump file does not exist FAIL: gcc.target/powerpc/405-dlmzb-strlen-1.c scan-assembler dlmzb\\. FAIL: gcc.target/powerpc/440-dlmzb-strlen-1.c scan-assembler dlmzb\\. FAIL: gcc.target/powerpc/ppc64-double-1.c scan-assembler-not stfd === gcc Summary === # of expected passes56981 # of unexpected failures33 # of expected failures 173 # of unsupported tests 782 Reference log: Running target unix/-m32 FAIL: gcc.dg/debug/dwarf2/aranges-fnsec-1.c scan-assembler DW_AT_ranges FAIL: gcc.dg/and-1.c scan-assembler-not nand FAIL: gcc.dg/plugindir1.c (test for excess errors) FAIL: gcc.dg/plugindir2.c (test for excess errors) FAIL: gcc.dg/plugindir3.c (test for excess errors) FAIL: gcc.dg/plugindir4.c (test for excess errors) FAIL: gcc.dg/pr34668-1.c (internal compiler error) FAIL: gcc.dg/pr34668-1.c (test for excess errors) FAIL: gcc.dg/pragma-darwin.c (test for excess errors) FAIL: gcc.dg/sms-2.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-3.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-4.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-5.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/sms-6.c scan-rtl-dump-times sms SMS succeeded 3 FAIL: gcc.dg/sms-7.c scan-rtl-dump-times sms SMS succeeded 3 FAIL: gcc.dg/sms-8.c scan-rtl-dump-times sms SMS succeeded 1 FAIL: gcc.dg/tree-ssa/pr42585.c scan-tree-dump-times optimized struct _fat_ptr _ans 0 FAIL: gcc.dg/tree-ssa/pr42585.c scan-tree-dump-times optimized struct _fat_ptr _T2 0 FAIL: gcc.dg/tree-ssa/vrp47.c scan-tree-dump-times vrp1 [xy][^ ]* != 0 FAIL: gcc.dg/tree-ssa/vrp47.c scan-tree-dump-times dom1 x[^ ]* y 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-31d.c scan-tree-dump-times vect vectorization not profitable 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-68d.c scan-tree-dump-times vect vectorization not profitable 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-76a.c scan-tree-dump-times vect vectorized 1 loops 1 FAIL: gcc.dg/vect/costmodel/ppc/costmodel-vect-76b.c scan-tree-dump-times vect vectorization not profitable 1 FAIL: gcc.dg/vect/pr35821-altivec.c scan-tree-dump-times vect vectorized 1 loops 1 FAIL: gcc.dg/vect/section-anchors-pr27770.c (test for excess errors) FAIL: gcc.dg/vect/section-anchors-vect-69.c (test for excess errors) FAIL: gcc.dg/vect/section-anchors-vect-69.c scan-tree-dump-times vect Alignment of access forced using peeling 4 FAIL:
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #15 from bernds at gcc dot gnu dot org 2010-04-27 09:47 --- Thanks. Could you attach those object files (ignoring ifcvt.o since it obviously changes due to the source change)? Even better would be if you could produce assembly output by finding the command that produced the outputs and adding -S etc. Please also add -v to the compiler so that we can see the exact options that are passed to cc1 (as I mentioned, I'm unable to reproduce codegen differences, and my set of testcases includes .i from recent gcc sources, so I'm wondering if there are any machine-specific options I need to pass). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #16 from dominiq at lps dot ens dot fr 2010-04-27 15:24 --- Thanks. Could you attach those object files (ignoring ifcvt.o since it obviously changes due to the source change)? Even better would be if you could produce assembly output by finding the command that produced the outputs and adding -S etc. Please also add -v to the compiler so that we can see the exact options that are passed to cc1 (as I mentioned, I'm unable to reproduce codegen differences, and my set of testcases includes .i from recent gcc sources, so I'm wondering if there are any machine-specific options I need to pass). I'll attach the (omega|real).(i|s) files got with [karma] darwin_buildw/prev-gcc% /opt/gcc/darwin_buildw/./stage1-gcc/xgcc -B/opt/gcc/darwin_buildw/./stage1-gcc/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/bin/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/bin/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/lib/ -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/include -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/sys-include -c -g -O2 -mdynamic-no-pic -gtoggle -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 -I. -I. -I../../gcc-4.6-work/gcc -I../../gcc-4.6-work/gcc/. -I../../gcc-4.6-work/gcc/../include -I../../gcc-4.6-work/gcc/../libcpp/include -I/sw/include -I/sw/include -I../../gcc-4.6-work/gcc/../libdecnumber -I../../gcc-4.6-work/gcc/../libdecnumber/dpd -I../libdecnumber -I/sw/include -I/sw/include -DCLOOG_PPL_BACKEND ../../gcc-4.6-work/gcc/omega.c -v -save-temps Reading specs from /opt/gcc/darwin_buildw/./stage1-gcc/specs COLLECT_GCC=/opt/gcc/darwin_buildw/stage1-gcc/xgcc COLLECT_LTO_WRAPPER=/opt/gcc/darwin_buildw/./stage1-gcc/lto-wrapper Target: powerpc-apple-darwin9 Configured with: ../gcc-4.6-work/configure --prefix=/opt/gcc/gcc4.6w --mandir=/opt/gcc/gcc4.6w/share/man --infodir=/opt/gcc/gcc4.6w/share/info --build=powerpc-apple-darwin9 --enable-languages=c,fortran --with-gmp=/sw --with-libiconv-prefix=/usr --with-system-zlib --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib --with-cloog=/sw --with-ppl=/sw --with-mpc=/sw Thread model: posix gcc version 4.6.0 20100422 (experimental) [trunk revision 158639-43p2] (GCC) COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.5.8' '-B/opt/gcc/darwin_buildw/./stage1-gcc/' '-B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/bin/' '-B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/bin/' '-B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/lib/' '-isystem' '/opt/gcc/gcc4.6w/powerpc-apple-darwin9/include' '-isystem' '/opt/gcc/gcc4.6w/powerpc-apple-darwin9/sys-include' '-c' '-g' '-O2' '-mdynamic-no-pic' '-gtoggle' '-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' '-I.' '-I.' '-I../../gcc-4.6-work/gcc' '-I../../gcc-4.6-work/gcc/.' '-I../../gcc-4.6-work/gcc/../include' '-I../../gcc-4.6-work/gcc/../libcpp/include' '-I/sw/include' '-I/sw/include' '-I../../gcc-4.6-work/gcc/../libdecnumber' '-I../../gcc-4.6-work/gcc/../libdecnumber/dpd' '-I../libdecnumber' '-I/sw/include' '-I/sw/include' '-DCLOOG_PPL_BACKEND' '-v' '-save-temps' /opt/gcc/darwin_buildw/./stage1-gcc/cc1 -E -quiet -v -I. -I. -I../../gcc-4.6-work/gcc -I../../gcc-4.6-work/gcc/. -I../../gcc-4.6-work/gcc/../include -I../../gcc-4.6-work/gcc/../libcpp/include -I/sw/include -I/sw/include -I../../gcc-4.6-work/gcc/../libdecnumber -I../../gcc-4.6-work/gcc/../libdecnumber/dpd -I../libdecnumber -I/sw/include -I/sw/include -iprefix /opt/gcc/darwin_buildw/stage1-gcc/../lib/gcc/powerpc-apple-darwin9/4.6.0/ -isystem /opt/gcc/darwin_buildw/./stage1-gcc/include -isystem /opt/gcc/darwin_buildw/./stage1-gcc/include-fixed -D__DYNAMIC__ -DIN_GCC -DHAVE_CONFIG_H -DCLOOG_PPL_BACKEND -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/include -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/sys-include ../../gcc-4.6-work/gcc/omega.c -feliminate-unused-debug-symbols -mmacosx-version-min=10.5.8 -mdynamic-no-pic -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 -g -gtoggle -fworking-directory -O2 -fpch-preprocess -o omega.i ignoring nonexistent directory /opt/gcc/gcc4.6w/powerpc-apple-darwin9/include ignoring nonexistent directory /opt/gcc/gcc4.6w/powerpc-apple-darwin9/sys-include ignoring nonexistent directory /opt/gcc/darwin_buildw/stage1-gcc/../lib/gcc/powerpc-apple-darwin9/4.6.0/include ignoring nonexistent directory /opt/gcc/darwin_buildw/stage1-gcc/../lib/gcc/powerpc-apple-darwin9/4.6.0/include-fixed ignoring nonexistent directory
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #17 from dominiq at lps dot ens dot fr 2010-04-27 15:27 --- Created an attachment (id=20499) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20499action=view) bziped tar file containing the *.i and *.s files The *_f.* files corresponds to the failing bootstrap and the *_w.* ones to the successful bootstrap. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #18 from bernds at gcc dot gnu dot org 2010-04-27 22:27 --- Thanks for all the information. However, I'm still puzzled. Here's the situation. Thanks to your information, I think I can reproduce how the assembly files are generated: ./cc1 -feliminate-unused-debug-symbols -mmacosx-version-min=10.5.8 -mdynamic-no-pic -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 -g -gtoggle -fworking-directory -fpreprocessed -O2 omega_w.i -o omega_w.s However, both in the case of real_w.i and omega_w.i, it does not seem to matter whether the ifcvt patch is changed as in comment 7: I get identical assembly from both compilers, and interestingly it's identical to your omega_f.s and real_f.s. Two questions - are you sure you didn't reverse the _w and _f files (i.e. maybe _f is the working version and _w the failing one)? Are you sure this isn't a problem with your 4.0.1 bootstrap compiler? Can you try building a different working gcc (e.g. from the 4.5 branch), and bootstrapping with that? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #6 from dominiq at lps dot ens dot fr 2010-04-26 09:16 --- This PR is likely due to revision 158639: Author: bernds Date: Thu Apr 22 10:42:21 2010 UTC (3 days, 22 hours ago) Changed paths: 4 Log Message: * ifcvt.c (dead_or_predicable): Use df_simulate_find_defs and df_simulate_find_noclobber_defs as appropriate. Keep track of an extra set merge_set_noclobber, and use it to relax the final test slightly. * df.h (df_simulate_find_noclobber_defs): Declare. * df-problems.c (df_simulate_find_defs): Don't ignore partial or conditional defs. (df_simulate_find_noclobber_defs): New function. I have successfully bootstrapped revision 158633 (with r158643), revision 158639 (+r158643) fails to bootstrap with an ICE while configuring libgcc at stage 2, and revision 158634 (+r158643) is now at stage 3. I doubt that the revision in between 158634 and 158639 can break bootstap on ppc. -- dominiq at lps dot ens dot fr changed: What|Removed |Added CC||bernds at codesourcery dot ||com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #7 from bernds at codesourcery dot com 2010-04-26 12:11 --- What happens if you replace the new call to df_simulate_find_noclobber_defs in ifcvt.c with a call to df_simulate_find_defs? If that fixes the bootstrap, can you find a testcase where this changes code generation? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #8 from dominiq at lps dot ens dot fr 2010-04-26 12:28 ---
What happens if you replace the new call to df_simulate_find_noclobber_defs in
ifcvt.c with a call to df_simulate_find_defs?
Bootstrapping with the change (crossing my finger that I won't have to remove
the definition of df_simulate_find_noclobber_defs!-). Allow for 3h30 to pass
the critical point and over 5h to complete the bootstrap.
If that fixes the bootstrap, can you find a testcase where this changes code
generation?
With the faulty cc1, the following trivial test ICE at -O1
int
main ()
{
;
return 0;
}
What would you need?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #9 from bernds at codesourcery dot com 2010-04-26 12:56 --- One thing that would help would be to build just a stage1 compiler and target libraries, then run the testsuite. That might give us a smaller testcase to look at. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #10 from dominiq at lps dot ens dot fr 2010-04-26 13:15 --- Subject: Re: [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files One thing that would help would be to build just a stage1 compiler and target libraries, then run the testsuite. Indeed I don't know how I could do that. I RTFM but did not find it. That might give us a smaller testcase to look at. Looking at the build process, it seems that the xgcc built at stage 1 is able to build xgcc at stage 2, the later being unable to compile the trivial test case. Note that prev-gcc/xgcc compiles the test at -O1 without ICE. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #11 from bernds at codesourcery dot com 2010-04-26 13:19 --- (In reply to comment #10) Subject: Re: [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files One thing that would help would be to build just a stage1 compiler and target libraries, then run the testsuite. Indeed I don't know how I could do that. I RTFM but did not find it. See http://gcc.gnu.org/wiki/Top-Level_Bootstrap I think Q3 is the one you need. Bernd -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #12 from dominiq at lps dot ens dot fr 2010-04-26 16:24 --- What happens if you replace the new call to df_simulate_find_noclobber_defs in ifcvt.c with a call to df_simulate_find_defs? Bootstrapping with the change (crossing my finger that I won't have to remove the definition of df_simulate_find_noclobber_defs!-). Allow for 3h30 to pass the critical point and over 5h to complete the bootstrap. I am now at stage 3, so replacing df_simulate_find_noclobber_defs with df_simulate_find_defs seems to fix the bootstrap issue. See http://gcc.gnu.org/wiki/Top-Level_Bootstrap I think Q3 is the one you need. Thanks for the pointer. I'll try it after the build has completed. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #13 from bernds at codesourcery dot com 2010-04-26 22:54 --- I've tried the two versions of ifcvt.c with a powerpc-apple-darwin9 cross compiler. Out of many megabytes of testcases, I can find only one code generation difference with -O2 -fomit-frame-pointer for this target, and that looks correct as far as I can tell from the rtl dumps and assembly. If the testsuite run produces nothing, can you check the object files of the two stage2 compilers (working and broken) for differences in code generation? That could help narrow down which file is being miscompiled. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #3 from dominiq at lps dot ens dot fr 2010-04-25 14:31 --- can you provide a backtrace of this crash ? Putting a breakpoint at fancy_abort is not enough to get a backtrace: [karma] gcc/darwin_buildw% gdb /opt/gcc/darwin_buildw/./gcc/xgcc GNU gdb 6.3.50-20050815 (Apple version gdb-967) (Tue Jul 14 02:15:14 UTC 2009) ... a lot of warning: Could not find object file ... ... .. done (gdb) b fancy_abortBreakpoint 1 at 0x47d8 (gdb) run -B/opt/gcc/darwin_buildw/./gcc/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/bin/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/lib/ -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/include -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/sys-include -O1 -g conftest.c Starting program: /opt/gcc/darwin_buildw/gcc/xgcc -B/opt/gcc/darwin_buildw/./gcc/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/bin/ -B/opt/gcc/gcc4.6w/powerpc-apple-darwin9/lib/ -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/include -isystem /opt/gcc/gcc4.6w/powerpc-apple-darwin9/sys-include -O1 -g conftest.c ... a lot of warning: Could not find object file ... ... .+.. done cc1: internal compiler error: Bus error Please submit a full bug report, with preprocessed source if appropriate. See http://gcc.gnu.org/bugs.html for instructions. Program exited with code 01. What is the version of the system compiler used for that build ? gcc version 4.0.1 (Apple Inc. build 5493) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #4 from ebotcazou at gcc dot gnu dot org 2010-04-25 14:39 --- Putting a breakpoint at fancy_abort is not enough to get a backtrace: Because you aren't debugging the right executable (xgcc instead of cc1). Pass -v to the driver to get the command line involving cc1 and feed it to cc1 directly. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #5 from dominiq at lps dot ens dot fr 2010-04-25 15:39 --- Because you aren't debugging the right executable (xgcc instead of cc1). Pass -v to the driver to get the command line involving cc1 and feed it to cc1 directly. Thanks for the tip. The backtrace is Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x0005 0x0054f754 in read_integral_parameter () (gdb) bt #0 0x0054f754 in read_integral_parameter () #1 0x00485700 in decode_options () #2 0x00551278 in toplev_main () #3 0x1c44 in start () -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
-- rguenth at gcc dot gnu dot org changed: What|Removed |Added Target Milestone|--- |4.6.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #1 from dominiq at lps dot ens dot fr 2010-04-23 22:08 --- PR 43873 looks similar to this pr. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
[Bug bootstrap/43858] [4.6 Regression] Bootstrap failure for powerpc-apple-darwin9: cannot compute suffix of object files
--- Comment #2 from lacombar at gmail dot com 2010-04-23 22:15 --- can you provide a backtrace of this crash ? What is the version of the system compiler used for that build ? Thanks. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43858
