diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 60caa81..89eca00 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -4775,7 +4775,16 @@ std_gimplify_va_arg_expr (tree valist, tree type, tree *pre_p, tree *post_p) type = build_pointer_type (type); align = PARM_BOUNDARY / BITS_PER_UNIT; - boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type) / BITS_PER_UNIT; + boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type); + + /* When we align parameter on stack for caller, if the parameter + alignment is beyond PREFERRED_STACK_BOUNDARY, it will be + aligned at PREFERRED_STACK_BOUNDARY. We will match callee + here with caller. */ + if (boundary > PREFERRED_STACK_BOUNDARY) + boundary = PREFERRED_STACK_BOUNDARY; + + boundary /= BITS_PER_UNIT; /* Hoist the valist value into a temporary for the moment. */ valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL); |