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| author | Jan Hubicka <jh@suse.cz> | 2004-01-15 00:07:04 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2004-01-14 23:07:04 +0000 |
| commit | e1be55d0cb3495f770f7dff63b6863ec55855b17 (patch) | |
| tree | abaeb984e878c9db1857505cdb481fa65f664f9a /gcc/builtins.c | |
| parent | f560bf91ae0ba419d7445eb19c09a4d1ad341e75 (diff) | |
| download | gcc-e1be55d0cb3495f770f7dff63b6863ec55855b17.zip gcc-e1be55d0cb3495f770f7dff63b6863ec55855b17.tar.gz gcc-e1be55d0cb3495f770f7dff63b6863ec55855b17.tar.bz2 | |
builtins.c (std_expand_builtin_va_arg): Align operand when needed.
* builtins.c (std_expand_builtin_va_arg): Align operand when needed.
* i386.c (init_cumulative_args): Set warn_sse; fix handling of variadic
functions accepting SSE arguments
(function_arg): Warn only when asked to warn.
* i386.h (ix86_args): Add warn_sse/warn_mmx fiels.
From-SVN: r75892
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 5b49b08..c940899 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -3990,10 +3990,32 @@ std_expand_builtin_va_arg (tree valist, tree type) tree align, alignm1; tree rounded_size; rtx addr; + HOST_WIDE_INT boundary; /* Compute the rounded size of the type. */ align = size_int (PARM_BOUNDARY / BITS_PER_UNIT); alignm1 = size_int (PARM_BOUNDARY / BITS_PER_UNIT - 1); + boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type); + + /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually + requires greater alignment, we must perform dynamic alignment. */ + + if (boundary > PARM_BOUNDARY) + { + if (!PAD_VARARGS_DOWN) + { + t = build (MODIFY_EXPR, TREE_TYPE (valist), valist, + build (PLUS_EXPR, TREE_TYPE (valist), valist, + build_int_2 (boundary / BITS_PER_UNIT - 1, 0))); + TREE_SIDE_EFFECTS (t) = 1; + expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); + } + t = build (MODIFY_EXPR, TREE_TYPE (valist), valist, + build (BIT_AND_EXPR, TREE_TYPE (valist), valist, + build_int_2 (~(boundary / BITS_PER_UNIT - 1), -1))); + TREE_SIDE_EFFECTS (t) = 1; + expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); + } if (type == error_mark_node || (type_size = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type))) == NULL || TREE_OVERFLOW (type_size)) |