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| author | Jim Wilson <wilson@gcc.gnu.org> | 1996-04-16 18:04:32 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1996-04-16 18:04:32 -0700 |
| commit | 6fd5ac08f27178e29e89f34990357c3d4ec85a1b (patch) | |
| tree | d66f2e41899baaafde352dc4c7561c460b222169 /gcc/reload.c | |
| parent | 8b295000784bf5c967a00c38cc2bedef5a00772b (diff) | |
| download | gcc-6fd5ac08f27178e29e89f34990357c3d4ec85a1b.zip gcc-6fd5ac08f27178e29e89f34990357c3d4ec85a1b.tar.gz gcc-6fd5ac08f27178e29e89f34990357c3d4ec85a1b.tar.bz2 | |
(push_reload): Add extra reload for inside of SUBREG if
it is CONSTANT_P.
From-SVN: r11833
Diffstat (limited to 'gcc/reload.c')
| -rw-r--r-- | gcc/reload.c | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 4f79b6e..7288793 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -926,18 +926,23 @@ push_reload (in, out, inloc, outloc, class, However, we must reload the inner reg *as well as* the subreg in 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 - && GET_CODE (SUBREG_REG (in)) == REG - && REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER - && (! HARD_REGNO_MODE_OK (REGNO (SUBREG_REG (in)) + SUBREG_WORD (in), - inmode) - || (GET_MODE_SIZE (inmode) <= UNITS_PER_WORD - && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))) - > UNITS_PER_WORD) - && ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))) - / UNITS_PER_WORD) - != HARD_REGNO_NREGS (REGNO (SUBREG_REG (in)), - GET_MODE (SUBREG_REG (in))))))) + && (CONSTANT_P (SUBREG_REG (in)) + || (GET_CODE (SUBREG_REG (in)) == REG + && REGNO (SUBREG_REG (in)) < FIRST_PSEUDO_REGISTER + && (! HARD_REGNO_MODE_OK (REGNO (SUBREG_REG (in)) + + SUBREG_WORD (in), + inmode) + || (GET_MODE_SIZE (inmode) <= UNITS_PER_WORD + && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (in))) + > UNITS_PER_WORD) + && ((GET_MODE_SIZE (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 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; } - /* Similarly for paradoxical and problematical SUBREGs on the output. Note that there is no reason we need worry about the previous value 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 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; - if (outmode != VOIDmode) + if (outmode != VOIDmode + && GET_MODE_SIZE (outmode) > GET_MODE_SIZE (reload_outmode[i])) reload_outmode[i] = outmode; if (in != 0) reload_in[i] = in; |