https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70061
Bug ID: 70061 Summary: [6 Regression] ICE: SIGSEGV in delete_insn_chain() with -mstringop-strategy=libcall Product: gcc Version: 6.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Target: i686-pc-linux-gnu Created attachment 37851 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37851&action=edit reduced testcase Compiler output: $ i686-pc-linux-gnu-gcc -Os -fno-tree-coalesce-vars -mstringop-strategy=libcall testcase.c testcase.c: In function 'foo': testcase.c:4:1: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6 foo(v8si c, v8si d) ^~~ testcase.c:4:1: warning: AVX vector argument without AVX enabled changes the ABI [-Wpsabi] testcase.c:10:1: internal compiler error: Segmentation fault } ^ 0xbb842f crash_signal /repo/gcc-trunk/gcc/toplev.c:335 0x72f55d safe_as_a<rtx_insn*, rtx_def> /repo/gcc-trunk/gcc/rtl.h:844 0x72f55d delete_insn_chain(rtx_def*, rtx_def*, bool) /repo/gcc-trunk/gcc/cfgrtl.c:246 0x72fa9f rtl_merge_blocks /repo/gcc-trunk/gcc/cfgrtl.c:885 0x7204d5 merge_blocks(basic_block_def*, basic_block_def*) /repo/gcc-trunk/gcc/cfghooks.c:774 0x13d5df4 merge_blocks_move /repo/gcc-trunk/gcc/cfgcleanup.c:774 0x13d5df4 try_optimize_cfg /repo/gcc-trunk/gcc/cfgcleanup.c:2787 0x13d5df4 cleanup_cfg(int) /repo/gcc-trunk/gcc/cfgcleanup.c:3028 0x71c0c2 execute /repo/gcc-trunk/gcc/cfgexpand.c:6467 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. $ i686-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-233911-checking-yes-rtl-df-nographite-i686/bin/../libexec/gcc/i686-pc-linux-gnu/6.0.0/lto-wrapper Target: i686-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld --with-as=/usr/bin/i686-pc-linux-gnu-as --with-sysroot=/usr/i686-pc-linux-gnu --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-233911-checking-yes-rtl-df-nographite-i686 Thread model: posix gcc version 6.0.0 20160302 (experimental) (GCC) Tested revisions: trunk r233911 - FAIL trunk r233861 - FAIL 5-branch r233800 - OK