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(push_reload): Add extra reload for inside of SUBREG if 

it is CONSTANT_P.

From-SVN: r11833
This commit is contained in:
Jim Wilson 1996-04-16 18:04:32 -07:00
parent 8b29500078
commit 6fd5ac08f2
1 changed files with 22 additions and 14 deletions
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36
gcc/reload.c
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@ -926,18 +926,23 @@ push_reload (in, out, inloc, outloc, class,
However, we must reload the inner reg *as well as* the subreg in However, we must reload the inner reg *as well as* the subreg in
that case. */ that case. */
/* Similar issue for (SUBREG constant ...) if it was not handled by the
code above. This can happen if SUBREG_WORD != 0. */
if (in != 0 && GET_CODE (in) == SUBREG if (in != 0 && GET_CODE (in) == SUBREG
&& GET_CODE (SUBREG_REG (in)) == REG && (CONSTANT_P (SUBREG_REG (in))
&& REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER || (GET_CODE (SUBREG_REG (in)) == REG
&& (! HARD_REGNO_MODE_OK (REGNO (SUBREG_REG (in)) + SUBREG_WORD (in), && REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER
inmode) && (! HARD_REGNO_MODE_OK (REGNO (SUBREG_REG (in))
|| (GET_MODE_SIZE (inmode) <= UNITS_PER_WORD + SUBREG_WORD (in),
&& (GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))) inmode)
> UNITS_PER_WORD) || (GET_MODE_SIZE (inmode) <= UNITS_PER_WORD
&& ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))) && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (in)))
/ UNITS_PER_WORD) > UNITS_PER_WORD)
!= HARD_REGNO_NREGS (REGNO (SUBREG_REG (in)), && ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (in)))
GET_MODE (SUBREG_REG (in))))))) / UNITS_PER_WORD)
!= HARD_REGNO_NREGS (REGNO (SUBREG_REG (in)),
GET_MODE (SUBREG_REG (in)))))))))
{ {
/* This relies on the fact that emit_reload_insns outputs the /* This relies on the fact that emit_reload_insns outputs the
instructions for input reloads of type RELOAD_OTHER in the same instructions for input reloads of type RELOAD_OTHER in the same
@ -950,7 +955,6 @@ push_reload (in, out, inloc, outloc, class,
dont_remove_subreg = 1; dont_remove_subreg = 1;
} }
/* Similarly for paradoxical and problematical SUBREGs on the output. /* Similarly for paradoxical and problematical SUBREGs on the output.
Note that there is no reason we need worry about the previous value Note that there is no reason we need worry about the previous value
of SUBREG_REG (out); even if wider than out, of SUBREG_REG (out); even if wider than out,
@ -1271,9 +1275,13 @@ push_reload (in, out, inloc, outloc, class,
For example, we may now have both IN and OUT For example, we may now have both IN and OUT
while the old one may have just one of them. */ while the old one may have just one of them. */
if (inmode != VOIDmode) /* The modes can be different. If they are, we want to reload in
the larger mode, so that the value is valid for both modes. */
if (inmode != VOIDmode
&& GET_MODE_SIZE (inmode) > GET_MODE_SIZE (reload_inmode[i]))
reload_inmode[i] = inmode; reload_inmode[i] = inmode;
if (outmode != VOIDmode) if (outmode != VOIDmode
&& GET_MODE_SIZE (outmode) > GET_MODE_SIZE (reload_outmode[i]))
reload_outmode[i] = outmode; reload_outmode[i] = outmode;
if (in != 0) if (in != 0)
reload_in[i] = in; reload_in[i] = in;