https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114278
Bug ID: 114278 Summary: ICE: in extract_bit_field_1, at expmed.cc:1838 with memmove, _BitInt() and -O2 -fno-tree-dce -fno-tree-dse -fno-tree-ccp -m32 Product: gcc Version: 14.0 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 CC: jakub at gcc dot gnu.org Target Milestone: --- Host: x86_64-pc-linux-gnu Target: i686-pc-linux-gnu Created attachment 57653 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57653&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -O2 -fno-tree-dce -fno-tree-dse -fno-tree-ccp -m32 testcase.c -Wall -W during RTL pass: expand testcase.c: In function 'foo': testcase.c:4:37: internal compiler error: in extract_bit_field_1, at expmed.cc:1838 4 | _BitInt(128) b = *(_BitInt(128) *)__builtin_memmove(&b, p, 16); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 0x758082 extract_bit_field_1 /repo/gcc-trunk/gcc/expmed.cc:1838 0x10a868c extract_bit_field(rtx_def*, poly_int<1u, unsigned long>, poly_int<1u, unsigned long>, int, rtx_def*, machine_mode, machine_mode, bool, rtx_def**) /repo/gcc-trunk/gcc/expmed.cc:2151 0x10c7654 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /repo/gcc-trunk/gcc/expr.cc:12456 0x10d323d store_expr(tree_node*, rtx_def*, int, bool, bool) /repo/gcc-trunk/gcc/expr.cc:6740 0x10d5e6f expand_assignment(tree_node*, tree_node*, bool) /repo/gcc-trunk/gcc/expr.cc:6461 0x10d5e6f expand_assignment(tree_node*, tree_node*, bool) /repo/gcc-trunk/gcc/expr.cc:5946 0xf8cfe9 expand_gimple_stmt_1 /repo/gcc-trunk/gcc/cfgexpand.cc:3998 0xf8cfe9 expand_gimple_stmt /repo/gcc-trunk/gcc/cfgexpand.cc:4077 0xf8e677 expand_gimple_basic_block /repo/gcc-trunk/gcc/cfgexpand.cc:6133 0xf90cfe execute /repo/gcc-trunk/gcc/cfgexpand.cc:6872 Please submit a full bug report, with preprocessed source (by using -freport-bug). 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-r14-9346-20240306205443-g74e8cc28eda-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.1/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 --enable-libsanitizer --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r14-9346-20240306205443-g74e8cc28eda-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 14.0.1 20240306 (experimental) (GCC)