Robert Schiele <rschi...@gmail.com> wrote on 11.12.2012 12:12:45: > Before I build the cross compiler for ARM target I do a bootstrap > process of an i686 compiler on the same code base to use that one > building the cross compiler to reduce the chance of seeing subtle > problems late in the game. This process unveiled a x86 bootstrap > regression with some of your changes on the Linaro 4.7 branch. [snip]
> This is the introduction of optimize_unreachable in gcc/tree-ssa-ccp.c. [snip] > ../../gcc/gcc/sel-sched.c: In function 'void sel_sched_region_2(int)': > ../../gcc/gcc/sel-sched.c:7472:1: error: mismatching comparison operand types > struct rtx_def * > bool > if (insn_1716 == 0) > > ../../gcc/gcc/sel-sched.c:7472:1: internal compiler error: > verify_gimple failed > Please submit a full bug report, > with preprocessed source if appropriate. > See <http://gcc.gnu.org/bugs.html> for instructions. > > Note, that the --disable-checking is essential to reproduce. As soon > as you do --enable-checking the bootstrap completes successfully. I > would assume that you then still have the bug in the compiler but it > is just subtle enough not to be triggered then. This does look exactly like: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54684 which was indeed a bug in optimize_unreachable, fixed by Richard Biener: http://gcc.gnu.org/ml/gcc-patches/2012-09/msg01634.html Can you verify whether this patch fixes your problem? We'll have to backport the fix to Linaro GCC as well. Also, if you don't mind, could you open a Launchpad bug to track this issue? Thanks! Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzende des Aufsichtsrats: Martina Koederitz | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294 _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
