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optabs.c (emit_libcall_block): When using non-call exceptions, don't mark libcalls never throwing. 

2001-06-14  Andrew Haley  <aph@cambridge.redhat.com>

        * optabs.c (emit_libcall_block): When using non-call exceptions,
        don't mark libcalls never throwing.

From-SVN: r43504
This commit is contained in:
Andrew Haley 2001-06-22 16:42:33 +00:00 committed by Andrew Haley
parent 8b8d3a3451
commit 5154e79ae4
2 changed files with 31 additions and 13 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-06-14 Andrew Haley <aph@cambridge.redhat.com>
* optabs.c (emit_libcall_block): When using non-call exceptions,
don't mark libcalls never throwing.
2001-06-21 Stan Shebs <shebs@apple.com>
* objc/objc-act.c (hash_init): Use xcalloc.

39
gcc/optabs.c
View File

@ -2820,23 +2820,36 @@ emit_libcall_block (insns, target, result, equiv)
into a MEM later. Protect the libcall block from this change. */
if (! REG_P (target) || REG_USERVAR_P (target))
target = gen_reg_rtx (GET_MODE (target));
/* If we're using non-call exceptions, a libcall corresponding to an
operation that may trap may also trap. */
if (flag_non_call_exceptions && may_trap_p (equiv))
{
for (insn = insns; insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == CALL_INSN)
{
rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
if (note != 0 && INTVAL (XEXP (note, 0)) <= 0)
remove_note (insn, note);
}
}
else
/* look for any CALL_INSNs in this sequence, and attach a REG_EH_REGION
reg note to indicate that this call cannot throw or execute a nonlocal
goto (unless there is already a REG_EH_REGION note, in which case
we update it). */
for (insn = insns; insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == CALL_INSN)
{
rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
if (note != 0)
XEXP (note, 0) = GEN_INT (-1);
else
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EH_REGION, GEN_INT (-1),
REG_NOTES (insn));
}
for (insn = insns; insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == CALL_INSN)
{
rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
if (note != 0)
XEXP (note, 0) = GEN_INT (-1);
else
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EH_REGION, GEN_INT (-1),
REG_NOTES (insn));
}
/* First emit all insns that set pseudos. Remove them from the list as
we go. Avoid insns that set pseudos which were referenced in previous