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| author | Jakub Jelinek <jakub@redhat.com> | 2005-02-11 22:08:44 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2005-02-11 22:08:44 +0100 |
| commit | 97e9692bfbd5d43f26bc7938336affe1f5fddaaa (patch) | |
| tree | 7fae11a3fb3ae2fe3eb5779237227483c916e792 /gcc/fold-const.c | |
| parent | 28f8ecf9120fefbc4b046b256c0731a270dc6c7b (diff) | |
| download | gcc-97e9692bfbd5d43f26bc7938336affe1f5fddaaa.zip gcc-97e9692bfbd5d43f26bc7938336affe1f5fddaaa.tar.gz gcc-97e9692bfbd5d43f26bc7938336affe1f5fddaaa.tar.bz2 | |
re PR middle-end/19858 (ICE on simple SSE code)
PR middle-end/19858
* fold-const.c (make_bit_field_ref): If bitpos == 0 and bitsize
is number of inner's bits, avoid creating a BIT_FIELD_REF.
* gcc.c-torture/compile/20050210-1.c: New test.
From-SVN: r94892
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index de54258..0d73273 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3076,8 +3076,20 @@ static tree make_bit_field_ref (tree inner, tree type, int bitsize, int bitpos, int unsignedp) { - tree result = build3 (BIT_FIELD_REF, type, inner, - size_int (bitsize), bitsize_int (bitpos)); + tree result; + + if (bitpos == 0) + { + tree size = TYPE_SIZE (TREE_TYPE (inner)); + if ((INTEGRAL_TYPE_P (TREE_TYPE (inner)) + || POINTER_TYPE_P (TREE_TYPE (inner))) + && host_integerp (size, 0) + && tree_low_cst (size, 0) == bitsize) + return fold_convert (type, inner); + } + + result = build3 (BIT_FIELD_REF, type, inner, + size_int (bitsize), bitsize_int (bitpos)); BIT_FIELD_REF_UNSIGNED (result) = unsignedp; |