The attached testcase generates a segfault during alias analysis run as part of the DSE pass.
Command line options: /scratch/rearnsha/gnu/gcc-eabi/git/gcc/cc1 -quiet -nostdinc -v -I /scratch/rearnsha/gnu/gcc-eabi/git/git-vfp-eabi-O3/linux-2.4.23-pre3-testplatform/include -I . -imultilib fpu -iprefix /scratch/rearnsha/gnu/gcc-eabi/git/gcc/../lib/gcc/arm-eabi/4.6.0/ -isystem /scratch/rearnsha/gnu/gcc-eabi/git/gcc/include -isystem /scratch/rearnsha/gnu/gcc-eabi/git/gcc/include-fixed -D__USES_INITFINI__ -D __linux__ -D __KERNEL__ -D CONFIG_ARCH_S390X -D CONFIG_ARCH_S390 -U __i386__ -U __x86_64__ -D KBUILD_BASENAME=memory -isystem /scratch/rearnsha/gnu/testinstall/arm-eabi/sys-include -iwithprefix include -quiet -dumpbase memory.c -mcpu=arm1136jf-s -marm -mfpu=vfp -mfloat-abi=hard -auxbase-strip memory.o -O3 -w -version -fno-short-enums -fno-strict-aliasing -fno-common -fomit-frame-pointer besttry.c Testcase is from CSiBE. -- Summary: [4.6 regression] ICE during tree_ssa_dse Product: gcc Version: 4.6.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rearnsha at gcc dot gnu dot org GCC target triplet: arm-eabi http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45535