diff options
Diffstat (limited to 'gcc/rtl.c')
| -rw-r--r-- | gcc/rtl.c | 53 |
1 files changed, 14 insertions, 39 deletions
diff --git a/gcc/rtl.c b/gcc/rtl.c index 84a2df0e20a..6c771f695e4 100644 --- a/gcc/rtl.c +++ b/gcc/rtl.c @@ -279,17 +279,11 @@ rtvec_alloc (n) if (ggc_p) rt = ggc_alloc_rtvec (n); else - { - int i; - - rt = (rtvec) obstack_alloc (rtl_obstack, - sizeof (struct rtvec_def) - + (( n - 1) * sizeof (rtx))); - - /* clear out the vector */ - for (i = 0; i < n; i++) - rt->elem[i] = 0; - } + rt = (rtvec) obstack_alloc (rtl_obstack, + sizeof (struct rtvec_def) + + ((n - 1) * sizeof (rtx))); + /* clear out the vector */ + memset (&rt->elem[0], 0, n * sizeof (rtx)); PUT_NUM_ELEM (rt, n); return rt; @@ -303,39 +297,20 @@ rtx_alloc (code) RTX_CODE code; { rtx rt; + int n = GET_RTX_LENGTH (code); if (ggc_p) - rt = ggc_alloc_rtx (GET_RTX_LENGTH (code)); + rt = ggc_alloc_rtx (n); else - { - register struct obstack *ob = rtl_obstack; - register int nelts = GET_RTX_LENGTH (code); - register int length = sizeof (struct rtx_def) - + (nelts - 1) * sizeof (rtunion); - - /* This function is called more than any other in GCC, so we - manipulate the obstack directly. + rt = (rtx) obstack_alloc (rtl_obstack, + sizeof (struct rtx_def) + + ((n - 1) * sizeof (rtunion))); - Even though rtx objects are word aligned, we may be sharing - an obstack with tree nodes, which may have to be double-word - aligned. So align our length to the alignment mask in the - obstack. */ - - length = (length + ob->alignment_mask) & ~ ob->alignment_mask; - - if (ob->chunk_limit - ob->next_free < length) - _obstack_newchunk (ob, length); - rt = (rtx)ob->object_base; - ob->next_free += length; - ob->object_base = ob->next_free; - - /* We want to clear everything up to the FLD array. Normally, - this is one int, but we don't want to assume that and it - isn't very portable anyway; this is. */ - - memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion)); - } + /* We want to clear everything up to the FLD array. Normally, this + is one int, but we don't want to assume that and it isn't very + portable anyway; this is. */ + memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion)); PUT_CODE (rt, code); return rt; } |