diff options
Diffstat (limited to 'gcc/tree-flow-inline.h')
| -rw-r--r-- | gcc/tree-flow-inline.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/gcc/tree-flow-inline.h b/gcc/tree-flow-inline.h index 7bc21b8..d8593bd 100644 --- a/gcc/tree-flow-inline.h +++ b/gcc/tree-flow-inline.h @@ -1725,7 +1725,30 @@ var_can_have_subvars (const_tree v) return false; } - + +/* Return true, if the two ranges [POS1, SIZE1] and [POS2, SIZE2] + overlap. SIZE1 and/or SIZE2 can be (unsigned)-1 in which case the + range is open-ended. Otherwise return false. */ + +static inline bool +ranges_overlap_p (unsigned HOST_WIDE_INT pos1, + unsigned HOST_WIDE_INT size1, + unsigned HOST_WIDE_INT pos2, + unsigned HOST_WIDE_INT size2) +{ + if (pos1 >= pos2 + && (size2 == (unsigned HOST_WIDE_INT)-1 + || pos1 < (pos2 + size2))) + return true; + if (pos2 >= pos1 + && (size1 == (unsigned HOST_WIDE_INT)-1 + || pos2 < (pos1 + size1))) + return true; + + return false; +} + + /* Return true if OFFSET and SIZE define a range that overlaps with some portion of the range of SV, a subvar. If there was an exact overlap, *EXACT will be set to true upon return. */ |