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)
