https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70355
Bug ID: 70355 Summary: ICE: in simplify_subreg_concatn, at lower-subreg.c:617 with -funroll-loops -mavx512f Product: gcc Version: 6.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Target: x86_64-pc-linux-gnu Created attachment 38056 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38056&action=edit reduced testcase Compiler output: $ gcc -O2 -fno-tree-ter -funroll-loops -mavx512f -g testcase.c testcase.c: In function 'foo': testcase.c:11:1: internal compiler error: in simplify_subreg_concatn, at lower-subreg.c:617 } ^ 0x14b7f6b simplify_subreg_concatn /repo/gcc-trunk/gcc/lower-subreg.c:617 0x14bad95 resolve_debug /repo/gcc-trunk/gcc/lower-subreg.c:1139 0x14bad95 decompose_multiword_subregs /repo/gcc-trunk/gcc/lower-subreg.c:1540 0x14bbd1d execute /repo/gcc-trunk/gcc/lower-subreg.c:1735 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. $ gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-234373-checking-yes-rtl-df-nographite/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-234373-checking-yes-rtl-df-nographite Thread model: posix gcc version 6.0.0 20160321 (experimental) (GCC) Tested revisions: trunk r234373 - FAIL 5-branch r234375 - FAIL