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(push_reload): Don't reload inside a SUBREG when SUBREG_WORD is 

nonzero.

From-SVN: r9757
This commit is contained in:
Richard Kenner 1995-05-20 07:52:46 -04:00
parent c102bba010
commit d030f4b2d7
1 changed files with 5 additions and 3 deletions
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8
gcc/reload.c
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@ -798,9 +798,11 @@ 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. */
and M1 is not the same size as M2. If SUBREG_WORD is nonzero, we
cannot reload just the inside since we might end up with the wrong
register class. */
if (in != 0 && GET_CODE (in) == SUBREG
if (in != 0 && GET_CODE (in) == SUBREG && SUBREG_WORD (in) == 0
#ifdef CLASS_CANNOT_CHANGE_SIZE
&& class != CLASS_CANNOT_CHANGE_SIZE
#endif
@ -898,7 +900,7 @@ push_reload (in, out, inloc, outloc, class,
storing in a subreg is entitled to clobber it all
(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
if (out != 0 && GET_CODE (out) == SUBREG && SUBREG_WORD (out) == 0
#ifdef CLASS_CANNOT_CHANGE_SIZE
&& class != CLASS_CANNOT_CHANGE_SIZE
#endif