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| author | Richard Henderson <rth@redhat.com> | 2011-06-14 06:31:43 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2011-06-14 06:31:43 -0700 |
| commit | 40873cdd57493f0dca7a5842e5a141ef10504aff (patch) | |
| tree | af26a993461004b04bd46635e26fcdd7f9a336b1 /gcc/dwarf2out.c | |
| parent | 73e8cb24c2655ff316d58c559c082c8d1ef67ed9 (diff) | |
| download | gcc-40873cdd57493f0dca7a5842e5a141ef10504aff.tar.gz | |
re PR debug/48459 (avr: Assertion failure with -gdwarf-2)
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
Diffstat (limited to 'gcc/dwarf2out.c')
| -rw-r--r-- | gcc/dwarf2out.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index 776066b275c..c1c22b46323 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -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 |