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remove one more assert from expr.c:fixup_args_size_notes which got tripped by earlier hacks.

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This commit is contained in:
Wolfgang Thaller 2014-09-25 11:21:13 +02:00
parent aa1c71d17e
commit 025ebb6397
1 changed files with 16 additions and 2 deletions
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18
gcc/gcc/expr.c
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@ -3975,15 +3975,29 @@ fixup_args_size_notes (rtx prev, rtx last, int end_args_size)
continue; continue;
this_delta = find_args_size_adjust (insn); this_delta = find_args_size_adjust (insn);
/* if (this_delta == 0)
/* **** HALF-UNDERSTOOD HACK:
The original code here leaves out REG_ARGS_SIZE annotations for
instructions that don't adjust the stack under some circumstances.
In some situations, involving both m68k mac pascal functions
and exception handling, this leads to a failure in dwarf2cfi.c:combine_traces.
Disabling the if (this_delta == 0) fixes this, but causes the subsequent gcc_assert
to trip sometimes. Disabling both hasn't caused any observable problems... YET.
if (this_delta == 0)
{ {
if (!CALL_P (insn) if (!CALL_P (insn)
|| ACCUMULATE_OUTGOING_ARGS || ACCUMULATE_OUTGOING_ARGS
|| find_reg_note (insn, REG_NORETURN, NULL_RTX) == NULL_RTX) || find_reg_note (insn, REG_NORETURN, NULL_RTX) == NULL_RTX)
continue; continue;
}*/ }
gcc_assert (!saw_unknown); gcc_assert (!saw_unknown);
*/
if (this_delta == HOST_WIDE_INT_MIN) if (this_delta == HOST_WIDE_INT_MIN)
saw_unknown = true; saw_unknown = true;