[Bug ipa/92254] [10 regression] ICE LTO in inline_small_functions, at ipa-inline.c:2000

[dimhen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92254

--- Comment #1 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
$ cat a.i
typedef unsigned (*c)(void *, void *);
typedef struct {
  c d;
} e;

unsigned bar(void *, void *);
unsigned baz(void *, void *);
static const e f[] = {{bar}, {baz}};

const e *foo() {
    return f;
}

$ cat b.i
unsigned f1(int *, unsigned short);
unsigned baz(void *c, void *d) {
  int *a = c;
  (void)d;
  if (!c)
    return 1;
  return f1(a, 0);
}

$ cat c.i
unsigned f1(int *, unsigned short);
unsigned bar(void *c, void *d) {
  int *a = c;
  (void)d;
  if (!c)
    return 1;
  return f1(a, 0);
}

$ cat d.i
int b, c;
int a(int *);

unsigned f1(int *d, unsigned short e) {
  b = 0;
  if (e) {
    a(d);
    if (c)
      return 0;
  }
  return a(d);
}

$ cat x.ver
{ global:
foo;
local: *; };

$ gcc -fpreprocessed -O2 -flto -c a.i b.i c.i d.i

$ gcc -flto -fPIC -DPIC -shared a.o b.o c.o d.o -Wl,-version-script
-Wl,/home/dimhen/errs/gcc10/PR92254/x.ver -o libso.so
during IPA pass: inline
lto1: internal compiler error: in inline_small_functions, at ipa-inline.c:2000
0x900b07 inline_small_functions
        /home/dimhen/src/gcc_current/gcc/ipa-inline.c:2000
0x900b07 ipa_inline
        /home/dimhen/src/gcc_current/gcc/ipa-inline.c:2615
0x900b07 execute
        /home/dimhen/src/gcc_current/gcc/ipa-inline.c:3023
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: /home/dimhen/arch-gcc/gcc_277504/bin/gcc returned 1
exit status
compilation terminated.
/usr/local/binutils_current/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status