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reload.c (push_reload): Check for subreg_lowpart_p instead of SUBREG_BYTE being 0 when... 

* reload.c (push_reload): Check for subreg_lowpart_p instead of
        SUBREG_BYTE being 0 when determining if the inner part of a subreg
        can be reloaded.

From-SVN: r45480
This commit is contained in:
Roman Lechtchinsky 2001-09-07 22:19:05 +00:00 committed by Richard Henderson
parent 4a063bec6e
commit b4905cba94
2 changed files with 10 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2001-09-07 Roman Lechtchinsky <rl@cs.tu-berlin.de>
* reload.c (push_reload): Check for subreg_lowpart_p instead of
SUBREG_BYTE being 0 when determining if the inner part of a subreg
can be reloaded.
2001-09-07 Roman Lechtchinsky <rl@cs.tu-berlin.de>
* c-common.c (signed_or_unsigned_type): Handle machine mode types

8
gcc/reload.c
View File

@ -937,13 +937,13 @@ push_reload (in, out, inloc, outloc, class,
Finally, reload the inner expression if it is a register that is in
the class whose registers cannot be referenced in a different size
and M1 is not the same size as M2. If SUBREG_BYTE is nonzero, we
and M1 is not the same size as M2. If subreg_lowpart_p is false, we
cannot reload just the inside since we might end up with the wrong
register class. But if it is inside a STRICT_LOW_PART, we have
no choice, so we hope we do get the right register class there. */
if (in != 0 && GET_CODE (in) == SUBREG
&& (SUBREG_BYTE (in) == 0 || strict_low)
&& (subreg_lowpart_p (in) || strict_low)
#ifdef CLASS_CANNOT_CHANGE_MODE
&& (class != CLASS_CANNOT_CHANGE_MODE
|| ! CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (SUBREG_REG (in)), inmode))
@ -977,7 +977,7 @@ push_reload (in, out, inloc, outloc, class,
&& REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER
/* The case where out is nonzero
is handled differently in the following statement. */
&& (out == 0 || SUBREG_BYTE (in) == 0)
&& (out == 0 || subreg_lowpart_p (in))
&& ((GET_MODE_SIZE (inmode) <= UNITS_PER_WORD
&& (GET_MODE_SIZE (GET_MODE (SUBREG_REG (in)))
> UNITS_PER_WORD)
@ -1056,7 +1056,7 @@ push_reload (in, out, inloc, outloc, class,
(except in the case of STRICT_LOW_PART,
and in that case the constraint should label it input-output.) */
if (out != 0 && GET_CODE (out) == SUBREG
&& (SUBREG_BYTE (out) == 0 || strict_low)
&& (subreg_lowpart_p (out) || strict_low)
#ifdef CLASS_CANNOT_CHANGE_MODE
&& (class != CLASS_CANNOT_CHANGE_MODE
|| ! CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (SUBREG_REG (out)),