Launchpad has imported 9 comments from the remote bug at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49030.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2011-05-17T19:11:01+00:00 Rmansfield-t wrote: Created attachment 24268 preprocessed source $ ./xgcc -v Using built-in specs. COLLECT_GCC=./xgcc Target: arm-unknown-linux-gnueabi Configured with: ../configure --target=arm-unknown-linux-gnueabi --prefix=/home/ryan/x-tools/arm-unknown-linux-gnueabi --with-sysroot=/home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi//sys-root --disable-multilib --with-local-prefix=/home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-root --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-c99 --enable-long-long --enable-target-optspace target_alias=arm-unknown-linux-gnueabi --enable-languages=c++ --disable-shared --disable-libmudflap --disable-libssp Thread model: posix gcc version 4.7.0 20110517 (experimental) [trunk revision 173832] (GCC) $ ./xgcc -B. -O1 ~/ice.i /home/ryan/ice.i: In function 'bar': /home/ryan/ice.i:33:1: internal compiler error: in get_arm_condition_code, at config/arm/arm.c:17180 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/0 ------------------------------------------------------------------------ On 2011-05-20T09:50:09+00:00 Ibolton wrote: I haven't been able to reproduce this. Please can you include the args that are being sent to cc1. Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/1 ------------------------------------------------------------------------ On 2011-05-20T13:04:58+00:00 Rmansfield-t wrote: With rev173940 $ ./cc1 -fpreprocessed ice.i -quiet -O1 ice.i: In function 'bar': ice.i:33:1: internal compiler error: in get_arm_condition_code, at config/arm/arm.c:17021 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/2 ------------------------------------------------------------------------ On 2011-05-20T13:46:00+00:00 Ibolton wrote: I was hoping the compiler command would tell me what -mcpu it was defaulting to. Anyway, I have managed to reproduce it now, by compiling as follows: cc1 -fpreprocessed 49030.i -quiet -O1 -o 49030.s -mcpu=arm7tdmi -marm Note that it all works with -mthumb and/or -mcpu=cortex-a9. I have tried this with my old toolchain and it is broken as far back as r164700. Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/3 ------------------------------------------------------------------------ On 2011-05-20T14:41:41+00:00 Rmansfield-t wrote: (In reply to comment #3) > I was hoping the compiler command would tell me what -mcpu it was defaulting > to. I'm using an arm-unknown-linux-gnueabi configuration which defaults an arm10tdmi. linux-eabi.h:#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/4 ------------------------------------------------------------------------ On 2011-06-09T01:34:47+00:00 Michael Hope wrote: The same assert is seen in https://bugs.launchpad.net/ubuntu/+source/gcc-4.5/+bug/689887 in Thumb-2 mode on trunk r174795. Chung-Lin posted a patch at http://gcc.gnu.org/ml/gcc- patches/2011-03/msg00790.html but there are bootstrap issues. Adding -fno-if-conversion works around the problem. Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/5 ------------------------------------------------------------------------ On 2011-06-10T19:02:07+00:00 Mikpe wrote: It's caused by r161764: Author: sandra Date: Sat Jul 3 01:00:37 2010 New Revision: 161764 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161764 Log: 2010-07-02 Daniel Jacobowitz <d...@codesourcery.com> Julian Brown <jul...@codesourcery.com> Sandra Loosemore <san...@codesourcery.com> gcc/ * config/arm/arm.c (arm_canonicalize_comparison): Canonicalize DImode comparisons. Adjust to take both operands. (arm_select_cc_mode): Handle DImode comparisons. (arm_gen_compare_reg): Generate a scratch register for DImode comparisons which require one. Use xor for Thumb equality checks. (arm_const_double_by_immediates): New. (arm_print_operand): Allow 'Q' and 'R' for constants. (get_arm_condition_code): Handle new CC_CZmode and CC_NCVmode. ... Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/6 ------------------------------------------------------------------------ On 2011-06-12T15:23:40+00:00 Mikpe wrote: Created attachment 24503 more reduced test case, ICEs at -O1 for armv5te and armv6 Using this slightly more reduced test case I've found that gcc transforms (set (reg:CC_NCV ...) (compare:CC_NCV (reg:DI ...) (const_int 1 ...))) (if_then_else (ge (reg:CC_NCV ...) ...) ...) to (set (reg:CC_NCV ...) (compare:CC_NCV (reg:DI ...) (const_int 0 ...))) (if_then_else (gt (reg:CC_NCV ...) ...) because ifcvt calls noce_get_condition which calls canonicalize_condition, and the latter has a general rule to transform (GE x const) to (GT x const-1). So the careful code in e.g. cbranchdi4 to not generate unimplemented comparisons is neutralized by generic code. Do DImode comparisons really have to be asymmetric? I.e., could CC_NCV be removed? I see that LT is apparently supported so why can't GT be too? Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/7 ------------------------------------------------------------------------ On 2011-06-12T21:33:30+00:00 Mikpe wrote: I have a preliminary patch which creates a clone of *arm_cmpdi_insn that does a reverse comparison, via a new CC mode for must-be-reversed comparisons, and corresponding updates to arm_select_cc_mode and get_arm_condition_code. It's the same transformation from eg (GT x y) to (LT y x) that cstoredi4 does, only later so it can handle problematic comparisons introduced by the middle-end. This fixes the ICEs on the two test cases in this PR. I'll do a full bootstrap and regtest as soon as my test machine is done with its current bootstrap and regtest cycle. I'll send the FSF Yet Another Ping about my employer's copyright disclaimer first thing tomorrow. They've had the papers since January or February... Reply at: https://bugs.launchpad.net/gcc/+bug/809761/comments/8 ** Changed in: gcc Status: Unknown => Confirmed ** Changed in: gcc Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/809761 Title: oss4 version 4.2-build2004-1ubuntu1 failed to build on armel To manage notifications about this bug go to: https://bugs.launchpad.net/gcc/+bug/809761/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
