PR debug/53948
        * emit-rtl.c (reg_is_parm_p): New function.
        * regs.h (reg_is_parm_p): New prototype.
        * ira-conflicts.c (ira_build_conflicts): Allow parameters in
        callee-clobbered registers.

       PR debug/53948
        * gcc.dg/debug/dwarf2/pr53948.c: New test.

From-SVN: r195900