https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113567
Bug ID: 113567
Summary: ICE: SSA corruption: Unable to coalesce ssa_names 1
and 3 which are marked as MUST COALESCE. with
_BitInt() and computed goto
Product: gcc
Version: 14.0
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
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 57196
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57196&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc testcase.c
Unable to coalesce ssa_names 1 and 3 which are marked as MUST COALESCE.
a_1(ab) and a_3(ab)
during GIMPLE pass: bitintlower0
testcase.c: In function 'foo':
testcase.c:2:1: internal compiler error: SSA corruption
2 | foo(_BitInt(953) a)
| ^~~
0x163e4dd fail_abnormal_edge_coalesce
/repo/gcc-trunk/gcc/tree-ssa-coalesce.cc:1012
0x163e4dd coalesce_partitions
/repo/gcc-trunk/gcc/tree-ssa-coalesce.cc:1444
0x163e4dd coalesce_ssa_name(_var_map*)
/repo/gcc-trunk/gcc/tree-ssa-coalesce.cc:1898
0x271baf3 gimple_lower_bitint
/repo/gcc-trunk/gcc/gimple-lower-bitint.cc:6319
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-r14-8373-20240123195900-gdbc5f1f523b-checking-yes-rtl-df-extra-nobootstrap-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
--disable-bootstrap --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-r14-8373-20240123195900-gdbc5f1f523b-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.1 20240123 (experimental) (GCC)
