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riscv-gcc-1
Commit 63be01fb by John Wehle Committed by Jeff Law
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* rtlanal.c (find_last_value): Allow NULL_RTX for valid_to. 

From-SVN: r32163
parent 44a76fc8
Showing with 12 additions and 6 deletions
gcc/ChangeLog
2000-02-25 John Wehle (john@feith.com)
* rtlanal.c (find_last_value): Allow NULL_RTX for valid_to.
2000-02-25 Anthony Green <green@cygnus.com>
* toplev.c (rest_of_compilation): Rebuild jump labels if
......
gcc/rtlanal.c
......@@ -750,11 +750,12 @@ multiple_sets (insn)
return 0;
}
/* Return the last thing that X was assigned from before *PINSN. Verify that
the object is not modified up to VALID_TO. If it was, if we hit
a partial assignment to X, or hit a CODE_LABEL first, return X. If we
found an assignment, update *PINSN to point to it.
ALLOW_HWREG is set to 1 if hardware registers are allowed to be the src. */
/* Return the last thing that X was assigned from before *PINSN. If VALID_TO
is not NULL_RTX then verify that the object is not modified up to VALID_TO.
If the object was modified, if we hit a partial assignment to X, or hit a
CODE_LABEL first, return X. If we found an assignment, update *PINSN to
point to it. ALLOW_HWREG is set to 1 if hardware registers are allowed to
be the src. */
rtx
find_last_value (x, pinsn, valid_to, allow_hwreg)
......@@ -779,7 +780,8 @@ find_last_value (x, pinsn, valid_to, allow_hwreg)
if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST)
src = XEXP (note, 0);
if (! modified_between_p (src, PREV_INSN (p), valid_to)
if ((valid_to == NULL_RTX
|| ! modified_between_p (src, PREV_INSN (p), valid_to))
/* Reject hard registers because we don't usually want
to use them; we'd rather use a pseudo. */
&& (! (GET_CODE (src) == REG
......
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