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dwarf2out.c (dwarf2out_frame_debug): Handle adjustments of the frame pointer in the prologue.

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        * dwarf2out.c (dwarf2out_frame_debug): Handle adjustments of the
        frame pointer in the prologue.

From-SVN: r17131
This commit is contained in:
Gavin Koch 1997-12-18 07:48:19 -07:00 committed by Jeff Law
parent 913b5d5489
commit 63d96a9559
1 changed files with 33 additions and 0 deletions
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33
gcc/dwarf2out.c
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@ -1221,6 +1221,39 @@ dwarf2out_frame_debug (insn)
if (cfa_store_reg == STACK_POINTER_REGNUM)
cfa_store_offset += offset;
}
else if (dest == hard_frame_pointer_rtx)
{
/* Either setting the FP from an offset of the SP,
or adjusting the FP */
if (! frame_pointer_needed
|| REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
abort ();
if (XEXP (src, 0) == stack_pointer_rtx
&& GET_CODE (XEXP (src, 1)) == CONST_INT)
{
if (cfa_reg != STACK_POINTER_REGNUM)
abort ();
offset = INTVAL (XEXP (src, 1));
if (GET_CODE (src) == PLUS)
offset = -offset;
cfa_offset += offset;
cfa_reg = HARD_FRAME_POINTER_REGNUM;
}
else if (XEXP (src, 0) == hard_frame_pointer_rtx
&& GET_CODE (XEXP (src, 1)) == CONST_INT)
{
if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
abort ();
offset = INTVAL (XEXP (src, 1));
if (GET_CODE (src) == PLUS)
offset = -offset;
cfa_offset += offset;
}
else
abort();
}
else
{
if (GET_CODE (src) != PLUS