[Bug c++/56302] New: [4.8 Regression] sys/sdt.h asms stopped working at -O0

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56302



             Bug #: 56302

           Summary: [4.8 Regression] sys/sdt.h asms stopped working at -O0

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: c++

        AssignedTo: ja...@gcc.gnu.org

        ReportedBy: ja...@gcc.gnu.org





void

foo (const int x)

{

  __asm__ __volatile__ ("" : : "n" (-1 * (int) sizeof (&x)));

}



compiled just fine even at -O0 in 4.7, but starting with

http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192141

is no longer accepted at -O0.