[Bug debug/45882] No debug info for vars depending on unused parameter

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45882

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-16 08:35:41 UTC ---
Author: jakub
Date: Wed Mar 16 08:35:31 2011
New Revision: 171035

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171035
Log:
    PR debug/45882
    * rtl.def (ENTRY_VALUE): Change format from "e" to "0".
    * rtl.h (ENTRY_VALUE_EXP): Define.
    * rtl.c (rtx_equal_p_cb, rtx_equal_p): Handle ENTRY_VALUE.
    * cselib.c (rtx_equal_for_cselib_p, cselib_hash_rtx): Likewise.
    * print-rtl.c (print_rtx): Likewise.
    * gengtype.c (adjust_field_rtx_def): Likewise.
    * var-tracking.c (vt_add_function_parameter): Adjust
    gen_rtx_ENTRY_VALUE uses, use ENTRY_VALUE_EXP macro.
    * dwarf2out.c (mem_loc_descriptor): Use ENTRY_VALUE_EXP macro.
    * cfgexpand.c (expand_debug_expr): If a SSA_NAME without
    partition is a default definition of a PARM_DECL, use ENTRY_VALUE
    of its DECL_INCOMING_RTL if possible, or its DECL_RTL if set.

    * gcc.dg/guality/pr45882.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/guality/pr45882.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/cselib.c
    trunk/gcc/dwarf2out.c
    trunk/gcc/gengtype.c
    trunk/gcc/print-rtl.c
    trunk/gcc/rtl.c
    trunk/gcc/rtl.def
    trunk/gcc/rtl.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/var-tracking.c