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-rw-r--r--gcc/stor-layout.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c
index 321a4d24ca4..0ec818d7fbd 100644
--- a/gcc/stor-layout.c
+++ b/gcc/stor-layout.c
@@ -1407,8 +1407,15 @@ finalize_type_size (tree type)
&& TREE_CODE (type) != QUAL_UNION_TYPE
&& TREE_CODE (type) != ARRAY_TYPE)))
{
- TYPE_ALIGN (type) = GET_MODE_ALIGNMENT (TYPE_MODE (type));
- TYPE_USER_ALIGN (type) = 0;
+ unsigned mode_align = GET_MODE_ALIGNMENT (TYPE_MODE (type));
+
+ /* Don't override a larger alignment requirement coming from a user
+ alignment of one of the fields. */
+ if (mode_align >= TYPE_ALIGN (type))
+ {
+ TYPE_ALIGN (type) = mode_align;
+ TYPE_USER_ALIGN (type) = 0;
+ }
}
/* Do machine-dependent extra alignment. */
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