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| author | Richard Kenner <kenner@gcc.gnu.org> | 1997-03-10 16:10:20 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1997-03-10 16:10:20 -0500 |
| commit | 3c99d5ffb6ce983cd9df0b570d08b77eb7b9ddd2 (patch) | |
| tree | 282e942f870d17f29772bf53ba0fa2bf993cff0a /gcc | |
| parent | a3a03040fb9ec55225cdb4e3a5cfbb2c5b5dda94 (diff) | |
| download | gcc-3c99d5ffb6ce983cd9df0b570d08b77eb7b9ddd2.zip gcc-3c99d5ffb6ce983cd9df0b570d08b77eb7b9ddd2.tar.gz gcc-3c99d5ffb6ce983cd9df0b570d08b77eb7b9ddd2.tar.bz2 | |
(simplify_rtx, case SUBREG): Fix direction of test when calling operand_subword...
(simplify_rtx, case SUBREG): Fix direction of test when calling
operand_subword; use inline code intead of subreg_lowpart_p.
From-SVN: r13698
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/combine.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 2300ce9..89f6525 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3383,7 +3383,7 @@ simplify_rtx (x, op0_mode, last, in_dest) if (CONSTANT_P (SUBREG_REG (x)) && op0_mode != VOIDmode && GET_MODE_SIZE (mode) == UNITS_PER_WORD - && GET_MODE_SIZE (op0_mode) < UNITS_PER_WORD + && GET_MODE_SIZE (op0_mode) > UNITS_PER_WORD && GET_MODE_CLASS (mode) == MODE_INT) { temp = operand_subword (SUBREG_REG (x), SUBREG_WORD (x), @@ -3395,8 +3395,16 @@ simplify_rtx (x, op0_mode, last, in_dest) /* If we want a subreg of a constant, at offset 0, take the low bits. On a little-endian machine, that's always valid. On a big-endian machine, it's valid - only if the constant's mode fits in one word. */ - if (CONSTANT_P (SUBREG_REG (x)) && subreg_lowpart_p (x) + only if the constant's mode fits in one word. Note that we + cannot use subreg_lowpart_p since we SUBREG_REG may be VOIDmode. */ + if (CONSTANT_P (SUBREG_REG (x)) + && ((GET_MODE_SIZE (op0_mode) <= UNITS_PER_WORD + || ! WORDS_BIG_ENDIAN) + ? SUBREG_WORD (x) == 0 + : (SUBREG_WORD (x) + == ((GET_MODE_SIZE (op0_mode) + - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD)) + / UNITS_PER_WORD))) && GET_MODE_SIZE (mode) <= GET_MODE_SIZE (op0_mode) && (! WORDS_BIG_ENDIAN || GET_MODE_BITSIZE (op0_mode) <= BITS_PER_WORD)) |