https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105384
Bug ID: 105384
Summary: compilation never (?) finishes with __builtin_yn{,f,l}
at -O and above
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: compile-time-hog
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 52874
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52874&action=edit
reduced testcase
I don't know if this should be reported against gcc or libmpfr.
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O testcase.c -wrapper gdb,-q,--args
Reading symbols from
/repo/gcc-trunk/binary-trunk-r12-8242-20220425114659-gf0e170f72f8-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.1/cc1...
r
(gdb) r
Starting program:
/repo/gcc-trunk/binary-trunk-r12-8242-20220425114659-gf0e170f72f8-checking-yes-rtl-df-extra-nobootstrap-amd64/libexec/gcc/x86_64-pc-linux-gnu/12.0.1/cc1
-quiet -iprefix
/repo/gcc-trunk/binary-trunk-r12-8242-20220425114659-gf0e170f72f8-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../lib/gcc/x86_64-pc-linux-gnu/12.0.1/
testcase.c -quiet -dumpdir a- -dumpbase testcase.c -dumpbase-ext .c
-mtune=generic -march=x86-64 -O -o /tmp/ccIIYJf7.s
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
^C
Program received signal SIGINT, Interrupt.
0x00007ffff7c8ee22 in __gmpn_mul_1 () from /usr/lib64/libgmp.so.10
(gdb) bt
#0 0x00007ffff7c8ee22 in __gmpn_mul_1 () from /usr/lib64/libgmp.so.10
#1 0x00000000000155b7 in ?? ()
#2 0x00007ffff7c8503a in __gmpz_mul_ui () from /usr/lib64/libgmp.so.10
#3 0x00007ffff7d3964f in mpfr_yn () from /usr/lib64/libmpfr.so.6
#4 0x000000000100fe4a in do_mpfr_arg2 (result=result@entry=0x7fffffffc360,
func=0x643db0 <mpfr_yn@plt>, arg0=..., arg1=arg1@entry=0x7ffff7836260,
format=format@entry=0x26bb4c0 <ieee_double_format>) at
/repo/gcc-trunk/gcc/fold-const-call.cc:232
#5 0x0000000001012573 in do_mpfr_arg2 (format=0x26bb4c0 <ieee_double_format>,
arg1=0x7ffff7836260, arg0=..., func=<optimized out>, result=0x7fffffffc360)
at /repo/gcc-trunk/gcc/fold-const-call.cc:222
#6 fold_const_call_sss (format=0x26bb4c0 <ieee_double_format>,
arg1=0x7ffff7836260, arg0=..., fn=CFN_BUILT_IN_YN, result=0x7fffffffc360) at
/repo/gcc-trunk/gcc/fold-const-call.cc:1466
#7 fold_const_call_1 (fn=CFN_BUILT_IN_YN, type=0x7ffff770c348,
arg0=0x7ffff7708438, arg1=<optimized out>) at
/repo/gcc-trunk/gcc/fold-const-call.cc:1562
#8 0x0000000000e4ab9b in fold_builtin_2 (arg1=0x7ffff7833450,
arg0=0x7ffff7708438, fndecl=0x7ffff778c800, expr=0x0, loc=254475) at
/repo/gcc-trunk/gcc/builtins.cc:9376
#9 fold_builtin_n (loc=254475, expr=0x0, fndecl=0x7ffff778c800,
args=<optimized out>, nargs=<optimized out>) at
/repo/gcc-trunk/gcc/builtins.cc:9540
#10 0x0000000000fdcf3b in fold_build_call_array_loc (loc=loc@entry=254475,
type=0x7ffff770c348, fn=fn@entry=0x7ffff7836220, nargs=nargs@entry=2,
argarray=argarray@entry=0x7ffff7821d50)
at /repo/gcc-trunk/gcc/fold-const.cc:13965
#11 0x0000000000d52b40 in build_function_call_vec (loc=<optimized out>,
arg_loc=..., function=<optimized out>, params=<optimized out>,
origtypes=<optimized out>,
orig_fundecl=<optimized out>) at /repo/gcc-trunk/gcc/tree.h:3572
#12 0x0000000000d74094 in c_parser_postfix_expression_after_primary
(parser=0x7ffff76f7b40, expr_loc=254475, expr=...) at
/repo/gcc-trunk/gcc/c/c-parser.cc:10560
#13 0x0000000000d6b3e1 in c_parser_postfix_expression (parser=<optimized out>)
at /repo/gcc-trunk/gcc/c/c-parser.cc:10234
#14 0x0000000000d6f8eb in c_parser_unary_expression (parser=0x7ffff76f7b40) at
/repo/gcc-trunk/gcc/c/c-parser.cc:8261
#15 0x0000000000d71082 in c_parser_cast_expression (parser=0x7ffff76f7b40,
after=0x0) at /repo/gcc-trunk/gcc/c/c-parser.cc:8103
#16 0x0000000000d712ef in c_parser_binary_expression (parser=0x7ffff76f7b40,
after=0x0, omp_atomic_lhs=0x0) at /repo/gcc-trunk/gcc/c/c-parser.cc:7906
#17 0x0000000000d7277c in c_parser_conditional_expression
(parser=0x7ffff76f7b40, after=<optimized out>, omp_atomic_lhs=0x0) at
/repo/gcc-trunk/gcc/c/c-parser.cc:7606
#18 0x0000000000d72fa1 in c_parser_expr_no_commas (parser=0x7ffff76f7b40,
after=<optimized out>, omp_atomic_lhs=<optimized out>) at
/repo/gcc-trunk/gcc/c/c-parser.cc:7521
#19 0x0000000000d73212 in c_parser_expression (parser=0x7ffff76f7b40) at
/repo/gcc-trunk/gcc/c/c-parser.cc:10697
#20 0x0000000000d73979 in c_parser_expression_conv (parser=0x7ffff76f7b40) at
/repo/gcc-trunk/gcc/c/c-parser.cc:10736
#21 0x0000000000d68958 in c_parser_statement_after_labels
(parser=0x7ffff76f7b40, if_p=0x0, chain=0x0) at
/repo/gcc-trunk/gcc/c/c-parser.cc:6263
#22 0x0000000000d6af3b in c_parser_compound_statement_nostart
(parser=0x7ffff76f7b40) at /repo/gcc-trunk/gcc/c/c-parser.cc:5800
#23 0x0000000000d8ae86 in c_parser_compound_statement
(parser=parser@entry=0x7ffff76f7b40, endlocp=endlocp@entry=0x7fffffffd280) at
/repo/gcc-trunk/gcc/c/c-parser.cc:5609
#24 0x0000000000d8c909 in c_parser_declaration_or_fndef (parser=0x7ffff76f7b40,
fndef_ok=<optimized out>, static_assert_ok=<optimized out>, empty_ok=<optimized
out>,
nested=<optimized out>, start_attr_ok=<optimized out>,
objc_foreach_object_declaration=<optimized out>,
omp_declare_simd_clauses=<optimized out>, have_attrs=<optimized out>,
attrs=<optimized out>, oacc_routine_data=<optimized out>,
fallthru_attr_p=<optimized out>) at /repo/gcc-trunk/gcc/c/c-parser.cc:2544
#25 0x0000000000d94a54 in c_parser_external_declaration (parser=0x7ffff76f7b40)
at /repo/gcc-trunk/gcc/c/c-parser.cc:1779
#26 0x0000000000d9549c in c_parser_translation_unit (parser=<optimized out>) at
/repo/gcc-trunk/gcc/c/c-parser.cc:1652
#27 c_parse_file () at /repo/gcc-trunk/gcc/c/c-parser.cc:23357
#28 0x0000000000df6c8e in c_common_parse_file () at
/repo/gcc-trunk/gcc/c-family/c-opts.cc:1240
#29 0x00000000013a3ede in compile_file () at /repo/gcc-trunk/gcc/toplev.cc:452
#30 0x0000000000d0528e in do_compile (no_backend=false) at
/repo/gcc-trunk/gcc/toplev.cc:2168
#31 toplev::main (this=this@entry=0x7fffffffd57e, argc=<optimized out>,
argc@entry=17, argv=<optimized out>, argv@entry=0x7fffffffd6c8) at
/repo/gcc-trunk/gcc/toplev.cc:2320
#32 0x0000000000d071cf in main (argc=17, argv=0x7fffffffd6c8) at
/repo/gcc-trunk/gcc/main.cc:39
The execution doesn't seem to ever finish.
$ 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-r12-8242-20220425114659-gf0e170f72f8-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.1/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-r12-8242-20220425114659-gf0e170f72f8-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220425 (experimental) (GCC)
