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cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns which cannot throw.

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* cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns
	which cannot throw.

From-SVN: r46863
This commit is contained in:
Jakub Jelinek 2001-11-09 00:14:26 +01:00 • committed by Jakub Jelinek
parent 6608bd4de4
commit 89753b3a90
2 changed files with 17 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-11-09 Jakub Jelinek <jakub@redhat.com>
* cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns
which cannot throw.
Thu Nov 8 18:00:55 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* explow.c (convert_memory_address, case SUBREG): Only return

13
gcc/cfgrtl.c
View file

@ -1819,7 +1819,7 @@ purge_dead_edges (bb)
basic_block bb;
{
edge e, next;
rtx insn = bb->end;
rtx insn = bb->end, note;
bool purged = false;
if (GET_CODE (insn) == JUMP_INSN && !simplejump_p (insn))
@ -1878,6 +1878,17 @@ purge_dead_edges (bb)
return purged;
}
/* If this instruction cannot trap, remove REG_EH_REGION notes. */
if (GET_CODE (insn) == INSN
&& (note = find_reg_note (insn, REG_EH_REGION, NULL)))
{
rtx eqnote;
if (! may_trap_p (PATTERN (insn))
|| ((eqnote = find_reg_equal_equiv_note (insn))
&& ! may_trap_p (XEXP (eqnote, 0))))
remove_note (insn, note);
}
/* Cleanup abnormal edges caused by throwing insns that have been
eliminated. */
if (! can_throw_internal (bb->end))