https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78540
Bug ID: 78540 Summary: [6/7 Regression] ICE: in df_refs_verify, at df-scan.c:4062 with -O -march=core2 Product: gcc Version: 7.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Build: x86_64-pc-linux-gnu Created attachment 40155 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40155&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -O -march=core2 testcase.c testcase.c: In function 'fn1': testcase.c:7:1: warning: AVX512F vector return without AVX512F enabled changes the ABI [-Wpsabi] { ^ testcase.c:6:1: note: The ABI for passing parameters with 64-byte alignment has changed in GCC 4.6 fn1 (V a) ^~~ testcase.c: In function 'fn2': testcase.c:23:1: internal compiler error: in df_refs_verify, at df-scan.c:4062 } ^ 0x7bfc90 df_refs_verify /repo/gcc-trunk/gcc/df-scan.c:4062 0x7c483e df_insn_refs_verify /repo/gcc-trunk/gcc/df-scan.c:4129 0x7c69ce df_bb_verify /repo/gcc-trunk/gcc/df-scan.c:4154 0x7c6e87 df_scan_verify() /repo/gcc-trunk/gcc/df-scan.c:4286 0x7af588 df_verify() /repo/gcc-trunk/gcc/df-core.c:1831 0x7af60a df_analyze_1 /repo/gcc-trunk/gcc/df-core.c:1217 0x8e16b2 thread_prologue_and_epilogue_insns() /repo/gcc-trunk/gcc/function.c:5947 0x8e1e82 rest_of_handle_thread_prologue_and_epilogue /repo/gcc-trunk/gcc/function.c:6427 0x8e1e82 execute /repo/gcc-trunk/gcc/function.c:6469 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. $ x86_64-pc-linux-gnu-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-242884-checking-yes-rtl-df-extra-nographite-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-242884-checking-yes-rtl-df-extra-nographite-amd64 Thread model: posix gcc version 7.0.0 20161125 (experimental) (GCC) --enable-checking=df might be needed in order to reproduce. Tested revisions: r242884 - FAIL 6-branch r242029 - FAIL 5-branch r242028 - OK