diff options
Diffstat (limited to 'gcc/asan.c')
| -rw-r--r-- | gcc/asan.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gcc/asan.c b/gcc/asan.c index f7986d89f83..65b12473c00 100644 --- a/gcc/asan.c +++ b/gcc/asan.c @@ -3218,7 +3218,10 @@ asan_expand_mark_ifn (gimple_stmt_iterator *iter) /* Generate direct emission if size_in_bytes is small. */ if (size_in_bytes <= ASAN_PARAM_USE_AFTER_SCOPE_DIRECT_EMISSION_THRESHOLD) { - unsigned HOST_WIDE_INT shadow_size = shadow_mem_size (size_in_bytes); + const unsigned HOST_WIDE_INT shadow_size + = shadow_mem_size (size_in_bytes); + const unsigned int shadow_align + = (get_pointer_alignment (base) / BITS_PER_UNIT) >> ASAN_SHADOW_SHIFT; tree shadow = build_shadow_mem_access (iter, loc, base_addr, shadow_ptr_types[0], true); @@ -3226,9 +3229,11 @@ asan_expand_mark_ifn (gimple_stmt_iterator *iter) for (unsigned HOST_WIDE_INT offset = 0; offset < shadow_size;) { unsigned size = 1; - if (shadow_size - offset >= 4) + if (shadow_size - offset >= 4 + && (!STRICT_ALIGNMENT || shadow_align >= 4)) size = 4; - else if (shadow_size - offset >= 2) + else if (shadow_size - offset >= 2 + && (!STRICT_ALIGNMENT || shadow_align >= 2)) size = 2; unsigned HOST_WIDE_INT last_chunk_size = 0; |