https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104644
Bug ID: 104644
Summary: [12 Regression] ICE: SIGSEGV (infinite recursion in
fold_binary_loc / fold_build2_loc /
generic_simplify_NE_EXPR)
Product: gcc
Version: 12.0
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: x86_64-pc-linux-gnu
Created attachment 52493
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52493&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc testcase.c -wrapper valgrind,-q
testcase.c: In function 'foo':
testcase.c:4:29: warning: overflow in conversion from 'float' to 'short
unsigned int' changes value from '1.31072e+5f' to '65535' [-Woverflow]
4 | return __builtin_bswap16 ((float) 0x20000) != (char) (float) 0x20000;
| ^~~~~~~~~~~~~~~
==21462== Stack overflow in thread #1: can't grow stack to 0x1ffe001000
==21462== Can't extend stack to 0x1ffe000e48 during signal delivery for thread
1:
==21462== no stack segment
==21462==
==21462== Process terminating with default action of signal 11 (SIGSEGV)
==21462== Access not within mapped region at address 0x1FFE000E48
==21462== Stack overflow in thread #1: can't grow stack to 0x1ffe001000
==21462== at 0xE22224: ggc_internal_alloc(unsigned long, void (*)(void*),
unsigned long, unsigned long) (ggc-page.cc:1278)
==21462== If you believe this happened as a result of a stack
==21462== overflow in your program's main thread (unlikely but
==21462== possible), you can try to increase the size of the
==21462== main thread stack using the --main-stacksize= flag.
==21462== The main thread stack size used in this run was 16777216.
x86_64-pc-linux-gnu-gcc: internal compiler error: Segmentation fault signal
terminated program valgrind
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
(gdb) bt
#0 generic_simplify_113 (loc=2147483649, type=0x7ffff76c35e8,
captures=0x7ffffbfff090, cmp=NE_EXPR, bswap=CFN_BUILT_IN_BSWAP16,
_p1=<optimized out>, _p0=<optimized out>) at generic-match.cc:6558
#1 0x0000000001afd8db in generic_simplify_NE_EXPR (loc=2147483649,
type=0x7ffff76c35e8, _p0=0x7ffff70c7620, _p1=0x7ffff77f2510,
code=NE_EXPR) at generic-match.cc:61429
#2 0x0000000000fe500f in fold_binary_loc (loc=2147483649, code=NE_EXPR,
type=0x7ffff76c35e8, op0=0x7ffff70c7620, op1=0x7ffff77f2510)
at /repo/gcc-trunk/gcc/fold-const.cc:10862
#3 0x0000000000fedb6a in fold_build2_loc (loc=2147483649, code=NE_EXPR,
type=0x7ffff76c35e8, op0=0x7ffff70c7620, op1=0x7ffff77f2510)
at /repo/gcc-trunk/gcc/fold-const.cc:13814
#4 0x0000000000fedb6a in fold_build2_loc (loc=2147483649, code=NE_EXPR,
type=0x7ffff76c35e8, op0=0x7ffff77f2510, op1=0x7ffff70c7620)
at /repo/gcc-trunk/gcc/fold-const.cc:13814
#5 0x0000000001afd8db in generic_simplify_NE_EXPR (loc=2147483649,
type=0x7ffff76c35e8, _p0=0x7ffff70c75e8, _p1=0x7ffff77f24f8,
code=NE_EXPR) at generic-match.cc:61429
#6 0x0000000000fe500f in fold_binary_loc (loc=2147483649, code=NE_EXPR,
type=0x7ffff76c35e8, op0=0x7ffff70c75e8, op1=0x7ffff77f24f8)
at /repo/gcc-trunk/gcc/fold-const.cc:10862
#7 0x0000000000fedb6a in fold_build2_loc (loc=2147483649, code=NE_EXPR,
type=0x7ffff76c35e8, op0=0x7ffff70c75e8, op1=0x7ffff77f24f8)
at /repo/gcc-trunk/gcc/fold-const.cc:13814
#8 0x0000000000fedb6a in fold_build2_loc (loc=2147483649, code=NE_EXPR,
type=0x7ffff76c35e8, op0=0x7ffff77f24f8, op1=0x7ffff70c75e8)
at /repo/gcc-trunk/gcc/fold-const.cc:13814
#9 0x0000000001afd8db in generic_simplify_NE_EXPR (loc=2147483649,
type=0x7ffff76c35e8, _p0=0x7ffff70c75b0, _p1=0x7ffff77f2510,
code=NE_EXPR) at generic-match.cc:61429
...
$ 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-r12-7349-20220222175310-g54f74502327-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-r12-7349-20220222175310-g54f74502327-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220222 (experimental) (GCC)
