https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102046
Bug ID: 102046 Summary: [12 Regression] ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p, at gimple-expr.c:87 with -O3 -march=btver2 Product: gcc Version: 12.0 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 Created attachment 51352 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51352&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -O3 -march=btver2 testcase.c during GIMPLE pass: slp testcase.c: In function 'foo': testcase.c:9:1: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p, at gimple-expr.c:87 9 | foo (struct S *o) | ^~~ 0x7b5b32 tree_class_check_failed(tree_node const*, tree_code_class, char const*, int, char const*) /repo/gcc-trunk/gcc/tree.c:8738 0x6a48da tree_class_check(tree_node*, tree_code_class, char const*, int, char const*) /repo/gcc-trunk/gcc/tree.h:3514 0x6a48da useless_type_conversion_p(tree_node*, tree_node*) /repo/gcc-trunk/gcc/gimple-expr.c:87 0x1101c23 verify_gimple_assign_single /repo/gcc-trunk/gcc/tree-cfg.c:4647 0x1101c23 verify_gimple_assign /repo/gcc-trunk/gcc/tree-cfg.c:4716 0x1101c23 verify_gimple_stmt /repo/gcc-trunk/gcc/tree-cfg.c:4981 0x1105a19 verify_gimple_in_cfg(function*, bool) /repo/gcc-trunk/gcc/tree-cfg.c:5467 0xfb1a37 execute_function_todo /repo/gcc-trunk/gcc/passes.c:2042 0xfb244e execute_todo /repo/gcc-trunk/gcc/passes.c:2096 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/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-3106-20210824080953-g0deabebedd1-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-r12-3106-20210824080953-g0deabebedd1-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.0 20210824 (experimental) (GCC)