Hi, As the testcase in
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52857 shows, for (subreg:SI (plus:DI (reg/f:DI 16 argp) (const_int -128 [0xffffffffffffff80])) 0) we generates DW_OP_GNU_regval_type with INVALID_REGNUM. This patch checks dbx_reg_number for INVALID_REGNUM before using it. OK for trunk and 4.7? Thanks. H.J. --- 2012-04-03 H.J. Lu <hongjiu...@intel.com> PR debug/52857 * dwarf2out.c (mem_loc_descriptor): Don't generate DW_OP_GNU_regval_type with INVALID_REGNUM. diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index ca88fc5..935c86f 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -11664,7 +11664,8 @@ mem_loc_descriptor (rtx rtl, enum machine_mode mode, if (dwarf_strict) break; - if (REGNO (rtl) > FIRST_PSEUDO_REGISTER) + if (REGNO (rtl) > FIRST_PSEUDO_REGISTER + || dbx_reg_number (rtl) == INVALID_REGNUM) break; type_die = base_type_for_mode (mode, GET_MODE_CLASS (mode) == MODE_INT);
