diff options
| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-11-13 23:02:41 +0000 |
|---|---|---|
| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-11-13 23:02:41 +0000 |
| commit | ec6721458d7ca8daad35874715c85897f149fc38 (patch) | |
| tree | e159a838cef09b3940ca6950d9dac78d2cef6b9c /gcc | |
| parent | dfce740a3fa3ab39faa588f2db787111510a379f (diff) | |
| download | gcc-ec6721458d7ca8daad35874715c85897f149fc38.tar.gz | |
* fold-const.c (optimize_bit_field_compare): Recursively call
fold when simplifying non-constant comparisons between bit-fields.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@118783 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 22 |
2 files changed, 18 insertions, 9 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 45098d95c0f..965a9cf2281 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2006-11-13 Roger Sayle <roger@eyesopen.com> + + * fold-const.c (optimize_bit_field_compare): Recursively call + fold when simplifying non-constant comparisons between bit-fields. + 2006-11-13 Jakub Jelinek <jakub@redhat.com> * configure.ac: Add changequote around __LONG_DOUBLE_MATH_OPTIONAL diff --git a/gcc/fold-const.c b/gcc/fold-const.c index c986503f106..fe7ec587204 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3441,15 +3441,19 @@ optimize_bit_field_compare (enum tree_code code, tree compare_type, if (! const_p) /* If not comparing with constant, just rework the comparison and return. */ - return build2 (code, compare_type, - build2 (BIT_AND_EXPR, unsigned_type, - make_bit_field_ref (linner, unsigned_type, - nbitsize, nbitpos, 1), - mask), - build2 (BIT_AND_EXPR, unsigned_type, - make_bit_field_ref (rinner, unsigned_type, - nbitsize, nbitpos, 1), - mask)); + return fold_build2 (code, compare_type, + fold_build2 (BIT_AND_EXPR, unsigned_type, + make_bit_field_ref (linner, + unsigned_type, + nbitsize, nbitpos, + 1), + mask), + fold_build2 (BIT_AND_EXPR, unsigned_type, + make_bit_field_ref (rinner, + unsigned_type, + nbitsize, nbitpos, + 1), + mask)); /* Otherwise, we are handling the constant case. See if the constant is too big for the field. Warn and return a tree of for 0 (false) if so. We do |