diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/tree-ssa-structalias.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 396f112..268abf3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,8 @@ 2017-06-19 Jakub Jelinek <jakub@redhat.com> + * tree-ssa-structalias.c (get_constraint_for_ptr_offset): Multiply + in UWHI to avoid undefined overflow. + PR sanitizer/81125 * ubsan.h (enum ubsan_encode_value_phase): New. (ubsan_encode_value): Change second argument to diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index a4abd28..e563e9d 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -3087,7 +3087,7 @@ get_constraint_for_ptr_offset (tree ptr, tree offset, { /* Make sure the bit-offset also fits. */ HOST_WIDE_INT rhsunitoffset = soffset.to_shwi (); - rhsoffset = rhsunitoffset * BITS_PER_UNIT; + rhsoffset = rhsunitoffset * (unsigned HOST_WIDE_INT) BITS_PER_UNIT; if (rhsunitoffset != rhsoffset / BITS_PER_UNIT) rhsoffset = UNKNOWN_OFFSET; } |