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From: "k.even-mendoza at imperial dot ac.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/105910] New: ICE: with -O1 optimization level and code
 calling __builtin_return_address
Date: Thu, 09 Jun 2022 17:16:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105910

            Bug ID: 105910
           Summary: ICE: with -O1 optimization level and code calling
                    __builtin_return_address
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: k.even-mendoza at imperial dot ac.uk
  Target Milestone: ---

This code (reduced):=20
=3D=3D=3D
int a;
void b() {
  a =3D ((long)__builtin_return_address(0) ^ (long)__builtin_return_address=
(0)) *
      (long)__builtin_return_address(524288);
}
int main(void) { return 0;}
=3D=3D=3D
crashed the compiler with -O1: gcc -O1 test4.c

gcc: internal compiler error: Segmentation fault signal terminated program =
cc1
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.

=3D=3D=3D=3D
It works fine with other optimization levels including -O0. It happens with
gcc-11, gcc-12 and gcc-13 (tested with 20220606); with gcc-10 and below it
seems to work fine also with -O1.=