https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120631
Bug ID: 120631
Summary: [16 Regression] ICE: in decimal_integer_string, at
real.cc:2342 when mixing _BitInt() and _Decimal
constants
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: aarch64-unknown-linux-gnu
Created attachment 61623
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61623&action=edit
reduced testcase
Compiler output:
$ aarch64-unknown-linux-gnu-gcc testcase.c
testcase.c: In function 'foo':
testcase.c:4:3: internal compiler error: in decimal_integer_string, at
real.cc:2342
4 |
0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffwb
+ 0.df;
|
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x264a441 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0xc20eed fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1803
0x8c43f3 decimal_integer_string
/repo/gcc-trunk/gcc/real.cc:2342
0x8c43f3 decimal_from_integer
/repo/gcc-trunk/gcc/real.cc:2371
0x8c43f3 real_from_integer(real_value*, format_helper,
generic_wide_int<wide_int_ref_storage<false, true> > const&, signop)
/repo/gcc-trunk/gcc/real.cc:2312
0x17a0d8d real_value_from_int_cst(tree_node const*, tree_node const*)
/repo/gcc-trunk/gcc/tree.cc:2516
0x17a0dee build_real_from_int_cst(tree_node*, tree_node const*)
/repo/gcc-trunk/gcc/tree.cc:2530
0xf7f43a fold_convert_const
/repo/gcc-trunk/gcc/fold-const.cc:2506
0xf93744 fold_unary_loc(unsigned long, tree_code, tree_node*, tree_node*)
/repo/gcc-trunk/gcc/fold-const.cc:9226
0xfad3d2 fold(tree_node*)
/repo/gcc-trunk/gcc/fold-const.cc:13557
0xcfa2a8 convert_and_check(unsigned long, tree_node*, tree_node*, bool)
/repo/gcc-trunk/gcc/c-family/c-common.cc:1834
0xc85e1b build_binary_op(unsigned long, tree_code, tree_node*, tree_node*,
bool)
/repo/gcc-trunk/gcc/c/c-typeck.cc:14839
0xc8a21f parser_build_binary_op(unsigned long, tree_code, c_expr, c_expr)
/repo/gcc-trunk/gcc/c/c-typeck.cc:4685
0xcb53a5 c_parser_binary_expression
/repo/gcc-trunk/gcc/c/c-parser.cc:10391
0xcb65c6 c_parser_conditional_expression
/repo/gcc-trunk/gcc/c/c-parser.cc:9956
0xcb6df4 c_parser_expr_no_commas
/repo/gcc-trunk/gcc/c/c-parser.cc:9869
0xcb8657 c_parser_expression
/repo/gcc-trunk/gcc/c/c-parser.cc:13967
0xcb8e9a c_parser_expression_conv
/repo/gcc-trunk/gcc/c/c-parser.cc:14026
0xca8db7 c_parser_statement_after_labels
/repo/gcc-trunk/gcc/c/c-parser.cc:8404
0xcad1e0 c_parser_compound_statement_nostart
/repo/gcc-trunk/gcc/c/c-parser.cc:7805
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.
$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20250611071606-r16-1410-ge477e7cd104af9-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/16.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--enable-libsanitizer --with-sysroot=/usr/aarch64-unknown-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20250611071606-r16-1410-ge477e7cd104af9-checking-yes-rtl-df-extra-aarch64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20250611 (experimental) (GCC)
