http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51939
Bug #: 51939 Summary: ICE: in compute_affine_dependence, at tree-data-ref.c:4103 Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassig...@gcc.gnu.org ReportedBy: marb...@gmail.com Created attachment 26408 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26408 Reduced test case This fails with gcc-4.7.0-alpha20120114, works with gcc-4.5.3. Reduced test case attached. x86_64-pc-linux-gnu-gcc-4.7.0-alpha20120114 -O1 -fcheck-data-deps -D_LARGEFILE64_SOURCE=1 -c bug.c (Number of distance vectors differ: Banerjee has 3, Omega has 2. Banerjee dist vectors: 0 0 0 1 1 0 Omega dist vectors: 0 0 1 0 data dependence relation: (Data Dep: #(Data Ref: # bb: 9 # stmt: D.1732_13 = s_4(D)->strstart; # ref: s_4(D)->strstart; # base_object: s_4(D)->strstart; #) #(Data Ref: # bb: 9 # stmt: s_4(D)->strstart = D.1733_14; # ref: s_4(D)->strstart; # base_object: s_4(D)->strstart; #) inner loop index: 0 loop nest: (1 2 ) distance_vector: 0 0 distance_vector: 1 0 direction_vector: = = direction_vector: + = ) ) bug.c: In function ‘deflate’: bug.c:14:5: internal compiler error: in compute_affine_dependence, at tree-data-ref.c:4103 Please submit a full bug report, with preprocessed source if appropriate. x86_64-pc-linux-gnu-gcc-4.7.0-alpha20120114 -v Using built-in specs. COLLECT_GCC=x86_64-pc-linux-gnu-gcc-4.7.0-alpha20120114 COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.7.0-alpha20120114/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-4.7.0_alpha20120114/work/gcc-4.7-20120114/configure --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.7.0-alpha20120114 --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0-alpha20120114/include --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-alpha20120114 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-alpha20120114/man --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-alpha20120114/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0-alpha20120114/include/g++-v4 --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec --disable-fixed-point --with-ppl --with-cloog --disable-ppl-version-check --with-cloog-include=/usr/include/cloog-ppl --enable-lto --enable-nls --without-included-gettext --with-system-zlib --disable-werror --enable-secureplt --disable-multilib --enable-libmudflap --disable-libssp --enable-libgomp --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-alpha20120114/python --enable-checking=yes --disable-libgcj --disable-libquadmath --enable-languages=c,c++ --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-targets=all --with-bugurl=http://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.7.0_alpha20120114' Thread model: posix gcc version 4.7.0-alpha20120114 20120114 (experimental) (Gentoo 4.7.0_alpha20120114)