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| author | Jim Wilson <wilson@gcc.gnu.org> | 1992-12-31 14:31:24 -0800 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1992-12-31 14:31:24 -0800 |
| commit | dca52d8026885a3bfa6e67859a36b453bb41ead7 (patch) | |
| tree | 6fd25264c6d57f84455b69fc110aa73d7cf60c5f | |
| parent | 3002e1601b13c6a4cd4382788d97ebbd789e4ce9 (diff) | |
| download | gcc-dca52d8026885a3bfa6e67859a36b453bb41ead7.zip gcc-dca52d8026885a3bfa6e67859a36b453bb41ead7.tar.gz gcc-dca52d8026885a3bfa6e67859a36b453bb41ead7.tar.bz2 | |
(operands_match_p): For WORDS_BIG_ENDIAN machines,
make multiple register operands equivalent if the last register of
the groups are the same.
(subst_reloads): Use gen_lowpart_common to change mode of
reloadreg.
From-SVN: r3030
| -rw-r--r-- | gcc/reload.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 7757dd7..1b98a42 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -1592,6 +1592,16 @@ operands_match_p (x, y) else j = REGNO (y); + /* On a WORDS_BIG_ENDIAN machine, point to the last register of a + multiple hard register group, so that for example (reg:DI 0) and + (reg:SI 1) will be considered the same register. */ + if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD + && i < FIRST_PSEUDO_REGISTER) + i += (GET_MODE_SIZE (GET_MODE (x)) / UNITS_PER_WORD) - 1; + if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (y)) > UNITS_PER_WORD + && j < FIRST_PSEUDO_REGISTER) + j += (GET_MODE_SIZE (GET_MODE (y)) / UNITS_PER_WORD) - 1; + return i == j; } /* If two operands must match, because they are really a single @@ -4348,7 +4358,7 @@ subst_reloads () /* Encapsulate RELOADREG so its machine mode matches what used to be there. */ if (GET_MODE (reloadreg) != r->mode && r->mode != VOIDmode) - reloadreg = gen_rtx (REG, r->mode, REGNO (reloadreg)); + reloadreg = gen_lowpart_common (r->mode, reloadreg); /* If we are putting this into a SUBREG and RELOADREG is a SUBREG, we would be making nested SUBREGs, so we have to fix |