https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100887
Bug ID: 100887 Summary: [12 Regression] ICE: in ix86_expand_vector_init_concat, at config/i386/i386-expand.c:14178 with -mavx512f and __builtin_shufflevector() Product: gcc Version: 12.0 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: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 50913 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50913&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -mavx512f testcase.c during RTL pass: expand testcase.c: In function 'foo': testcase.c:6:3: internal compiler error: in ix86_expand_vector_init_concat, at config/i386/i386-expand.c:14178 6 | __builtin_shufflevector (u, v, 0); | ^~~~~~~~~~~~~~~~~~~~~~~ 0x7ddb42 ix86_expand_vector_init_concat /repo/gcc-trunk/gcc/config/i386/i386-expand.c:14178 0x149cf87 ix86_expand_vector_init(bool, rtx_def*, rtx_def*) /repo/gcc-trunk/gcc/config/i386/i386-expand.c:14622 0x18c32ee ??? /repo/gcc-trunk/gcc/config/i386/sse.md:22289 0xce0ba6 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*, rtx_def*) const /repo/gcc-trunk/gcc/recog.h:407 0xce0ba6 store_constructor /repo/gcc-trunk/gcc/expr.c:7217 0xce2645 expand_constructor /repo/gcc-trunk/gcc/expr.c:8555 0xccea3a expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /repo/gcc-trunk/gcc/expr.c:10738 0xcdbe6c store_expr(tree_node*, rtx_def*, int, bool, bool) /repo/gcc-trunk/gcc/expr.c:5986 0xcdd62d expand_assignment(tree_node*, tree_node*, bool) /repo/gcc-trunk/gcc/expr.c:5721 0xb97ef1 expand_gimple_stmt_1 /repo/gcc-trunk/gcc/cfgexpand.c:3916 0xb97ef1 expand_gimple_stmt /repo/gcc-trunk/gcc/cfgexpand.c:4014 0xb9e79b expand_gimple_basic_block /repo/gcc-trunk/gcc/cfgexpand.c:6056 0xba06c7 execute /repo/gcc-trunk/gcc/cfgexpand.c:6782 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. $ x86_64-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-1164-20210602094549-g659cc7d6320-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/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 --with-cloog --with-ppl --with-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-r12-1164-20210602094549-g659cc7d6320-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.0 20210602 (experimental) (GCC)