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emit-rtl.c (try_split): Copy NORETURN, SETJMP, ALWAYS_RETURN and NON_LOCAL_GOTO notes.

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* emit-rtl.c (try_split): Copy NORETURN, SETJMP, ALWAYS_RETURN
        and NON_LOCAL_GOTO notes.

From-SVN: r45691
This commit is contained in:
Richard Henderson 2001-09-19 11:27:49 -07:00 • committed by Richard Henderson
parent f068df3fe6
commit 216183ce28
2 changed files with 53 additions and 13 deletions
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3
gcc/ChangeLog
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@ -2,6 +2,9 @@
* cfgbuild.c (find_sub_basic_blocks): Handle insns that can throw.
* emit-rtl.c (try_split): Copy NORETURN, SETJMP, ALWAYS_RETURN
and NON_LOCAL_GOTO notes.
2001-09-18 Catherine Moore <clm@redhat.com>
* config/stormy16/stormy16.h (DEFAULT_PCC_STRUCT_RETURN):

63
gcc/emit-rtl.c
View file

@ -2513,7 +2513,6 @@ try_split (pat, trial, last)
if (GET_CODE (seq) == SEQUENCE)
{
int i, njumps = 0;
rtx eh_note;
/* Avoid infinite loop if any insn of the result matches
the original pattern. */
@ -2546,6 +2545,7 @@ try_split (pat, trial, last)
REG_NOTES (insn));
}
}
/* If we are splitting a CALL_INSN, look for the CALL_INSN
in SEQ and copy our CALL_INSN_FUNCTION_USAGE to it. */
if (GET_CODE (trial) == CALL_INSN)
@ -2554,18 +2554,55 @@ try_split (pat, trial, last)
CALL_INSN_FUNCTION_USAGE (XVECEXP (seq, 0, i))
= CALL_INSN_FUNCTION_USAGE (trial);
/* Copy EH notes. */
if ((eh_note = find_reg_note (trial, REG_EH_REGION, NULL_RTX)))
for (i = 0; i < XVECLEN (seq, 0); i++)
{
rtx insn = XVECEXP (seq, 0, i);
if (GET_CODE (insn) == CALL_INSN
|| (flag_non_call_exceptions
&& may_trap_p (PATTERN (insn))))
REG_NOTES (insn)
= gen_rtx_EXPR_LIST (REG_EH_REGION, XEXP (eh_note, 0),
REG_NOTES (insn));
}
/* Copy notes, particularly those related to the CFG. */
for (note = REG_NOTES (trial); note ; note = XEXP (note, 1))
{
switch (REG_NOTE_KIND (note))
{
case REG_EH_REGION:
for (i = XVECLEN (seq, 0) - 1; i >= 0; i--)
{
rtx insn = XVECEXP (seq, 0, i);
if (GET_CODE (insn) == CALL_INSN
|| (flag_non_call_exceptions
&& may_trap_p (PATTERN (insn))))
REG_NOTES (insn)
= gen_rtx_EXPR_LIST (REG_EH_REGION,
XEXP (note, 0),
REG_NOTES (insn));
}
break;
case REG_NORETURN:
case REG_SETJMP:
case REG_ALWAYS_RETURN:
for (i = XVECLEN (seq, 0) - 1; i >= 0; i--)
{
rtx insn = XVECEXP (seq, 0, i);
if (GET_CODE (insn) == CALL_INSN)
REG_NOTES (insn)
= gen_rtx_EXPR_LIST (REG_NOTE_KIND (note),
XEXP (note, 0),
REG_NOTES (insn));
}
break;
case REG_NON_LOCAL_GOTO:
for (i = XVECLEN (seq, 0) - 1; i >= 0; i--)
{
rtx insn = XVECEXP (seq, 0, i);
if (GET_CODE (insn) == JUMP_INSN)
REG_NOTES (insn)
= gen_rtx_EXPR_LIST (REG_NOTE_KIND (note),
XEXP (note, 0),
REG_NOTES (insn));
}
break;
default:
break;
}
}
/* If there are LABELS inside the split insns increment the
usage count so we don't delete the label. */