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re PR debug/48459 (avr: Assertion failure with -gdwarf-2)

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PR debug/48459
        * dwarf2out.c (frame_pointer_fb_offset_valid): New.
        (based_loc_descr): Assert it's true.
        (compute_frame_pointer_to_fb_displacement): Set it, rather than
        aborting immediately.

From-SVN: r175018
This commit is contained in:
Richard Henderson 2011-06-14 06:31:43 -07:00 • committed by Richard Henderson
parent 73e8cb24c2
commit 40873cdd57
2 changed files with 23 additions and 7 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2011-06-14 Richard Henderson <rth@redhat.com>
PR debug/48459
* dwarf2out.c (frame_pointer_fb_offset_valid): New.
(based_loc_descr): Assert it's true.
(compute_frame_pointer_to_fb_displacement): Set it, rather than
aborting immediately.
2011-06-14 Sanjin Liu <scliu@faraday-tech.com>
Mingfeng Wu <mingfeng@faraday-tech.com>

22
gcc/dwarf2out.c
View file

@ -6471,6 +6471,7 @@ static GTY(()) VEC(tree,gc) *generic_type_instances;
/* Offset from the "steady-state frame pointer" to the frame base,
within the current function. */
static HOST_WIDE_INT frame_pointer_fb_offset;
static bool frame_pointer_fb_offset_valid;
static VEC (dw_die_ref, heap) *base_types;
@ -13613,6 +13614,7 @@ based_loc_descr (rtx reg, HOST_WIDE_INT offset,
return new_reg_loc_descr (base_reg, offset);
}
gcc_assert (frame_pointer_fb_offset_valid);
offset += frame_pointer_fb_offset;
return new_loc_descr (DW_OP_fbreg, offset, 0);
}
@ -18336,14 +18338,20 @@ compute_frame_pointer_to_fb_displacement (HOST_WIDE_INT offset)
elim = XEXP (elim, 0);
}
gcc_assert ((SUPPORTS_STACK_ALIGNMENT
&& (elim == hard_frame_pointer_rtx
|| elim == stack_pointer_rtx))
|| elim == (frame_pointer_needed
? hard_frame_pointer_rtx
: stack_pointer_rtx));
frame_pointer_fb_offset = -offset;
/* ??? AVR doesn't set up valid eliminations when there is no stack frame
in which to eliminate. This is because it's stack pointer isn't
directly accessible as a register within the ISA. To work around
this, assume that while we cannot provide a proper value for
frame_pointer_fb_offset, we won't need one either. */
frame_pointer_fb_offset_valid
= ((SUPPORTS_STACK_ALIGNMENT
&& (elim == hard_frame_pointer_rtx
|| elim == stack_pointer_rtx))
|| elim == (frame_pointer_needed
? hard_frame_pointer_rtx
: stack_pointer_rtx));
}
/* Generate a DW_AT_name attribute given some string value to be included as