[Bug debug/36728] [stack]: gdb doesn't work with stack alignment

[hjl at gcc dot gnu dot org]

------- Comment #11 from hjl at gcc dot gnu dot org  2008-07-06 01:19 -------
Subject: Bug 36728

Author: hjl
Date: Sun Jul  6 01:18:49 2008
New Revision: 137517

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=137517
Log:
2008-07-05  H.J. Lu  <hongjiu.lu@intel.com>
            Xuepeng Guo  <xuepeng.guo@intel.com>

        PR debug/36728
        * dwarf2out.c (dw_fde_node): Add drap_reg and vdrap_reg.  Remove
        cfa_uses_expression.
        (add_cfi): Check drap_reg instead of cfa_uses_expression.
        (dwarf2out_frame_debug_expr): Add rule 20 to handle virtual
        drap.  Update rule 19 to set drap_reg instead of
        cfa_uses_expression.
        (dwarf2out_begin_prologue): Initialize drap_reg and vdrap_reg
        to INVALID_REGNUM.
        (based_loc_descr): Use cfa+offset to represent the location of
        arguments passed on stack when drap is used to align stack.

        * config/i386/i386.c (ix86_get_drap_rtx): Set RTX_FRAME_RELATED_P
        bit on virtual drap insn.

Modified:
    branches/stack/gcc/ChangeLog.stackalign
    branches/stack/gcc/config/i386/i386.c
    branches/stack/gcc/dwarf2out.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36728