[Bug middle-end/110886] New: [14 Regression] ICE on linux-6.4.7: SIGSEGV on gimple_bitwise_inverted_equal_p (infinite recursion?)

[Bug middle-end/110886] New: [14 Regression] ICE on linux-6.4.7: SIGSEGV on gimple_bitwise_inverted_equal_p (infinite recursion?)

[slyfox at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110886

            Bug ID: 110886
           Summary: [14 Regression] ICE on linux-6.4.7: SIGSEGV on
                    gimple_bitwise_inverted_equal_p (infinite recursion?)
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: slyfox at gcc dot gnu.org
  Target Milestone: ---

Initially observed compiler crash on linux-6.4.7 when building with
r14-2930-g0460c122162793.

Extracted reproducer:

$ gcc -c altera.c.c -o altera.o -O2
gcc: internal compiler error: Segmentation fault signal terminated program cc1

Note: it fails to print the backtrace probably due to infinite recursion:

Program received signal SIGSEGV, Segmentation fault.
0x00000000009835c9 in operand_compare::verify_hash_value (this=0x262d168
<default_compare_instance>, arg0=0x7ffff760df30,
    arg1=0x7ffff7625168, flags=0, ret=0x7ffffbfff037) at
../../source/gcc/fold-const.cc:4068
4068    ../../source/gcc/fold-const.cc: No such file or directory.
(gdb) bt
#0  0x00000000009835c9 in operand_compare::verify_hash_value (this=0x262d168
<default_compare_instance>, arg0=0x7ffff760df30,
    arg1=0x7ffff7625168, flags=0, ret=0x7ffffbfff037) at
../../source/gcc/fold-const.cc:4068
#1  0x0000000000983d98 in operand_compare::operand_equal_p (flags=<optimized
out>, arg1=<optimized out>, arg0=<optimized out>,
    this=0x262d168 <default_compare_instance>) at
../../source/gcc/fold-const.cc:3090
#2  operand_equal_p (arg0=0x7ffff760df30, arg1=0x7ffff7625168, flags=0) at
../../source/gcc/fold-const.cc:4105
#3  0x0000000001aee18e in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff760df30, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:284
#4  0x0000000001aee1e4 in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff77dc000, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:289
#5  0x0000000001aee1e4 in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff760df30, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:289
#6  0x0000000001aee1e4 in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff77dc000, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:289
#7  0x0000000001aee1e4 in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff760df30, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:289
#8  0x0000000001aee1e4 in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff77dc000, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:289
#9  0x0000000001aee1e4 in gimple_bitwise_inverted_equal_p
(expr1=0x7ffff760df30, expr2=expr2@entry=0x7ffff7625168,
    valueize=valueize@entry=0xe9b9b0 <rpo_vn_valueize(tree_node*)>) at
../../source/gcc/gimple-match-head.cc:289
...

$ gcc -v
Using built-in specs.
COLLECT_GCC=/<<NIX>>/gcc-14.0.0/bin/gcc
COLLECT_LTO_WRAPPER=/<<NIX>>/gcc-14.0.0/libexec/gcc/x86_64-unknown-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../source/configure --prefix=/<<NIX>>/gcc-14.0.0
--with-gmp-include=/<<NIX>>/gmp-6.3.0-dev/include
--with-gmp-lib=/<<NIX>>/gmp-6.3.0/lib
--with-mpfr-include=/<<NIX>>/mpfr-4.2.0-dev/include
--with-mpfr-lib=/<<NIX>>/mpfr-4.2.0/lib --with-mpc=/<<NIX>>/libmpc-1.3.1
--with-native-system-header-dir=/<<NIX>>/glibc-2.38-dev/include
--with-build-sysroot=/ --program-prefix= --enable-lto --disable-libstdcxx-pch
--without-included-gettext --with-system-zlib --enable-checking=release
--enable-static --enable-languages=c,c++ --disable-multilib --enable-plugin
--disable-libcc1 --with-isl=/<<NIX>>/isl-0.20 --disable-bootstrap
--build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
--target=x86_64-unknown-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 99999999 (experimental) (GCC)

[Bug middle-end/110886] [14 Regression] ICE on linux-6.4.7: SIGSEGV on gimple_bitwise_inverted_equal_p (infinite recursion?)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110886

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 110874.

*** This bug has been marked as a duplicate of bug 110874 ***

[Bug middle-end/110886] [14 Regression] ICE on linux-6.4.7: SIGSEGV on gimple_bitwise_inverted_equal_p (infinite recursion?)

[slyfox at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110886

--- Comment #2 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Forgot the reproducer itself:

// $ cat altera.c.c
int altera_export_bool_array_count_i, altera_export_bool_array_count_line, r;
unsigned altera_export_bool_array_count_k;
void altera_export_bool_array_count() {
  int offset;
  altera_export_bool_array_count_line = 0;
  if (altera_export_bool_array_count_line < 1)
    offset = r;
  altera_export_bool_array_count_k = 0;
  for (;;) {
    altera_export_bool_array_count_i =
        altera_export_bool_array_count_k + offset;
    if (altera_export_bool_array_count_i & 3)
      ;
  }
}