[Bug target/105955] New: ICE when using __attribute__((__sysv_abi__)) on Cygwin

[mikulas at artax dot karlin.mff.cuni.cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105955

            Bug ID: 105955
           Summary: ICE when using __attribute__((__sysv_abi__)) on Cygwin
           Product: gcc
           Version: 11.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mikulas at artax dot karlin.mff.cuni.cz
  Target Milestone: ---

Compile this piece of code on 64-bit Cygwin distribution with gcc 11.3.0 with
or without optimizations.

The result is:
during RTL pass: pro_and_epilogue
gcc-crash.e: In function 'fn3':
gcc-crash.e:16:1: internal compiler error: in choose_baseaddr, at
config/i386/i386.c:6915
   16 | }
      | ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.


float fabsf(float x);

void * __attribute__((__sysv_abi__)) fn1(void);

_Bool __attribute__((__sysv_abi__)) fn2(float val)
{
        if (!(fabsf(val) < __builtin_huge_valf()))
                return 1;
        return 0;
}

_Bool fn3(void)
{
        void *p = fn1();
        return 1;
}