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reload1.c (fixup_eh_region_note): Remove assertion. 

2005-09-07  Andreas Krebbel  <krebbel1@de.ibm.com>

	* reload1.c (fixup_eh_region_note): Remove assertion.
	(fixup_abnormal_edges): Reverted removal of call to
	find_many_sub_basic_blocks made on 2005-08-31.

From-SVN: r103984
This commit is contained in:
Andreas Krebbel 2005-09-07 07:52:48 +00:00 committed by Andreas Krebbel
parent 30e6f306d3
commit b735f45d30
2 changed files with 15 additions and 18 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2005-09-07 Andreas Krebbel <krebbel1@de.ibm.com>
* reload1.c (fixup_eh_region_note): Remove assertion.
(fixup_abnormal_edges): Reverted removal of call to
find_many_sub_basic_blocks made on 2005-08-31.
2005-09-07 Richard Henderson <rth@redhat.com>
* function.c (ARG_POINTER_CFA_OFFSET): Move ...

27
gcc/reload1.c
View File

@ -3788,24 +3788,6 @@ fixup_eh_region_note (rtx insn, rtx prev, rtx next)
REG_NOTES (i)
= gen_rtx_EXPR_LIST (REG_EH_REGION, XEXP (note, 0), REG_NOTES (i));
}
/* ??? Since we entered with one eh insn, we should exit with one eh insn;
otherwise we're unsure that we're not losing an exception. Except that
the instruction stream incoming to reload doesn't pass the "if
reg_eh_region is present, may_trap_p is true" smoke test.
Worse, even if it did, rtx_addr_can_trap_p returns false for some forms
of address that include constants regardless of the actual value of the
constant. If we decide that "int a[3]; a[100000]" should be considered
non-trapping, we should get that story straight across more of the
compiler. If we decide that it should trap, then we cannot decide
may_trap_p on the basis of rtx_addr_can_trap_p at all. Which may not
be such a big thing -- it doesn't seem hard to get MEM_NOTRAP_P set
correctly in the first place.
Fixing all that is not in the cards for gcc 4.2, so for the nonce we
allow all eh insns to evaporate. */
gcc_assert (trap_count <= 1);
}
/* Reload pseudo-registers into hard regs around each insn as needed.
@ -8191,6 +8173,15 @@ fixup_abnormal_edges (void)
}
}
/* We've possibly turned single trapping insn into multiple ones. */
if (flag_non_call_exceptions)
{
sbitmap blocks;
blocks = sbitmap_alloc (last_basic_block);
sbitmap_ones (blocks);
find_many_sub_basic_blocks (blocks);
}
if (inserted)
commit_edge_insertions ();