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| author | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-06-04 18:04:36 +0000 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-06-04 18:04:36 +0000 |
| commit | 0631e0bfb7d40fd3cb58d2d5400075f49000ab51 (patch) | |
| tree | 829c85ccd2ce524faa3bdeb601db3f7f80cc282f /gcc/combine.c | |
| parent | 5c626f5260d6e2f48bdbd5461b74d11fdd02afe0 (diff) | |
| download | gcc-0631e0bfb7d40fd3cb58d2d5400075f49000ab51.zip gcc-0631e0bfb7d40fd3cb58d2d5400075f49000ab51.tar.gz gcc-0631e0bfb7d40fd3cb58d2d5400075f49000ab51.tar.bz2 | |
rtlanal.c (operand_preference): Fix preference for objects.
* rtlanal.c (operand_preference): Fix preference for objects.
* gcse.c (handle_avail_expr): Be prepared to handle single_set
parallels.
* combine.c (if_then_else_cond): Use simplify_subreg instead
of operand_subword.
* integreate.c (sub_constants): Likewise.
* emit-rtl.c (constant_subword): Deprecate; remove most of code
and use simplify_gen_subreg.
Mon Jun 4 19:55:23 CEST 2001 Lars Brinkhoff <lars@nocrew.org>
* sibcall.c (skip_copy_to_return_value): recognize the situation
when the called function's return value is copied into an
intermediate pseudo, and then into the calling functions return
value register.
From-SVN: r42864
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index e34ab2f..d3c70c3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7293,29 +7293,16 @@ if_then_else_cond (x, ptrue, pfalse) return cond0; } - /* If X is a normal SUBREG with both inner and outer modes integral, - we can narrow both the true and false values of the inner expression, - if there is a condition. */ - else if (code == SUBREG && GET_MODE_CLASS (mode) == MODE_INT - && GET_MODE_CLASS (GET_MODE (SUBREG_REG (x))) == MODE_INT - && GET_MODE_SIZE (mode) <= GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))) + /* If X is a SUBREG, we can narrow both the true and false values + if the inner expression, if there is a condition. */ + else if (code == SUBREG && 0 != (cond0 = if_then_else_cond (SUBREG_REG (x), &true0, &false0))) { - if ((GET_CODE (SUBREG_REG (x)) == REG - || GET_CODE (SUBREG_REG (x)) == MEM - || CONSTANT_P (SUBREG_REG (x))) - && GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))) > UNITS_PER_WORD - && (WORDS_BIG_ENDIAN || SUBREG_BYTE (x) >= UNITS_PER_WORD)) - { - true0 = operand_subword (true0, SUBREG_BYTE (x) / UNITS_PER_WORD, 0, - GET_MODE (SUBREG_REG (x))); - false0 = operand_subword (false0, SUBREG_BYTE (x) / UNITS_PER_WORD, 0, - GET_MODE (SUBREG_REG (x))); - } - *ptrue = force_to_mode (true0, mode, ~(HOST_WIDE_INT) 0, NULL_RTX, 0); - *pfalse - = force_to_mode (false0, mode, ~(HOST_WIDE_INT) 0, NULL_RTX, 0); + *ptrue = simplify_gen_subreg (mode, true0, + GET_MODE (SUBREG_REG (x)), SUBREG_BYTE (x)); + *pfalse = simplify_gen_subreg (mode, false0, + GET_MODE (SUBREG_REG (x)), SUBREG_BYTE (x)); return cond0; } |