diff options
| author | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-03-28 20:11:20 +0000 |
|---|---|---|
| committer | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-03-28 20:11:20 +0000 |
| commit | 74aab153b68fc0104587de60b95f628c9d6c4f4e (patch) | |
| tree | 5b3ea977e0d89e228ad35e4d140ae606fd436493 /gcc/tree-dfa.c | |
| parent | 39bc0e0cc92282b56f2c49eadc3b3f8091995b8a (diff) | |
| download | gcc-74aab153b68fc0104587de60b95f628c9d6c4f4e.tar.gz | |
* tree-dfa.c (get_ref_base_and_extent): Do not expect positive
offsets for BIT_FIELD_REF and COMPONENT_REF.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@123311 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-dfa.c')
| -rw-r--r-- | gcc/tree-dfa.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/gcc/tree-dfa.c b/gcc/tree-dfa.c index b23c531cadc..70563e70646 100644 --- a/gcc/tree-dfa.c +++ b/gcc/tree-dfa.c @@ -896,7 +896,7 @@ get_ref_base_and_extent (tree exp, HOST_WIDE_INT *poffset, switch (TREE_CODE (exp)) { case BIT_FIELD_REF: - bit_offset += tree_low_cst (TREE_OPERAND (exp, 2), 1); + bit_offset += tree_low_cst (TREE_OPERAND (exp, 2), 0); break; case COMPONENT_REF: @@ -906,11 +906,11 @@ get_ref_base_and_extent (tree exp, HOST_WIDE_INT *poffset, if (this_offset && TREE_CODE (this_offset) == INTEGER_CST) { - HOST_WIDE_INT hthis_offset = tree_low_cst (this_offset, 1); + HOST_WIDE_INT hthis_offset = tree_low_cst (this_offset, 0); hthis_offset *= BITS_PER_UNIT; bit_offset += hthis_offset; - bit_offset += tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1); + bit_offset += tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 0); } else { @@ -918,11 +918,8 @@ get_ref_base_and_extent (tree exp, HOST_WIDE_INT *poffset, /* We need to adjust maxsize to the whole structure bitsize. But we can subtract any constant offset seen sofar, because that would get us out of the structure otherwise. */ - if (maxsize != -1 - && csize && host_integerp (csize, 1)) - { - maxsize = (TREE_INT_CST_LOW (csize) - bit_offset); - } + if (maxsize != -1 && csize && host_integerp (csize, 1)) + maxsize = TREE_INT_CST_LOW (csize) - bit_offset; else maxsize = -1; } @@ -959,11 +956,8 @@ get_ref_base_and_extent (tree exp, HOST_WIDE_INT *poffset, /* We need to adjust maxsize to the whole array bitsize. But we can subtract any constant offset seen sofar, because that would get us outside of the array otherwise. */ - if (maxsize != -1 - && asize && host_integerp (asize, 1)) - { - maxsize = (TREE_INT_CST_LOW (asize) - bit_offset); - } + if (maxsize != -1 && asize && host_integerp (asize, 1)) + maxsize = TREE_INT_CST_LOW (asize) - bit_offset; else maxsize = -1; |