[Bug bootstrap/50878] New: ARM bootstrap failure on insn-preds.c with error: dominator of 12 should be 6, not 5

["michael.hope at linaro dot org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50878

             Bug #: 50878
           Summary: ARM bootstrap failure on insn-preds.c with error:
                    dominator of 12 should be 6, not 5
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: michael.hope@linaro.org


trunk r180460 fails during stage 2 with the following error:

../../../gcc-4.7~/gcc/config/arm/predicates.md: In function 'bool
constraint_satisfied_p(rtx, constraint_num)':
../../../gcc-4.7~/gcc/config/arm/predicates.md:924:1: error: dominator of 12
should be 6, not 5
../../../gcc-4.7~/gcc/config/arm/predicates.md:924:1: internal compiler error:
in verify_dominators, at dominance.c:1041

This happens on ARM in an ARMv5 configuration and Cortex-A9 configuration.

The full build log is here:

http://builds.linaro.org/toolchain/gcc-4.7~svn180460/logs/armv7l-natty-cbuild205-tcpanda04-cortexa9r1/gcc-build.txt

The Cortex-A9 configure flags are:

--prefix=/scratch/cbuild/slave/slaves/tcpanda04/gcc-4.7~svn180460/gcc/default/install
--enable-languages=c,c++,objc,obj-c++,fortran,lto --with-mode=thumb
--with-arch=armv7-a --with-tune=cortex-a9 --with-float=softfp --with-fpu=neon

More information about the host is here:

http://builds.linaro.org/toolchain/gcc-4.7~svn180460/logs/armv7l-natty-cbuild205-tcpanda04-cortexa9r1/host.txt