[Bug target/83067] New: wrong code on arm-linux-gnueabi

yangyibiao at nju dot edu.cn gcc-bugzilla@gcc.gnu.org
Mon Nov 20 11:31:00 GMT 2017


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83067

            Bug ID: 83067
           Summary: wrong code on arm-linux-gnueabi
           Product: gcc
           Version: 5.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yangyibiao at nju dot edu.cn
  Target Milestone: ---

$ arm-linux-gnueabi-gcc --version
arm-linux-gnueabi-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc --version
gcc --version
gcc (Ubuntu 5.4.1-2ubuntu1~16.04) 5.4.1 20160904
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ cat small.c
#define f(g) ({ unsigned long long u = (g); -((unsigned long long)(u));})

void main()
{
    printf("%d\n", f(65527));
}

$ arm-linux-gnueabi-gcc -static small.c; ./a.out
-150998972

$ gcc small.c; ./a.out
-65527


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