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(find_regno_note): Find note that overlaps REGNO, not just one that

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mentions REGNO explicitly.

From-SVN: r3929
This commit is contained in:
Richard Kenner 1993-03-30 15:36:43 -05:00
parent 2c0623e83a
commit 99309f3bcb
1 changed files with 9 additions and 2 deletions
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11
gcc/rtlanal.c
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@ -1135,7 +1135,9 @@ find_reg_note (insn, kind, datum)
}
/* Return the reg-note of kind KIND in insn INSN which applies to register
number REGNO, if any. Return 0 if there is no such reg-note. */
number REGNO, if any. Return 0 if there is no such reg-note. Note that
the REGNO of this NOTE need not be REGNO if REGNO is a hard register;
it might be the case that the note overlaps REGNO. */
rtx
find_regno_note (insn, kind, regno)
@ -1150,7 +1152,12 @@ find_regno_note (insn, kind, regno)
/* Verify that it is a register, so that scratch and MEM won't cause a
problem here. */
&& GET_CODE (XEXP (link, 0)) == REG
&& REGNO (XEXP (link, 0)) == regno)
&& REGNO (XEXP (link, 0)) <= regno
&& ((REGNO (XEXP (link, 0))
+ (REGNO (XEXP (link, 0)) >= FIRST_PSEUDO_REGISTER ? 1
: HARD_REGNO_NREGS (REGNO (XEXP (link, 0)),
GET_MODE (XEXP (link, 0)))))
> regno))
return link;
return 0;
}