static void
process_uses (df_ref use, int top_flag)
{
for (; use; use = DF_REF_NEXT_LOC (use))
if ((DF_REF_FLAGS (use) & DF_REF_AT_TOP) == top_flag)
{
unsigned int uregno = DF_REF_REGNO (use);
if (reg_defs[uregno]
&& !bitmap_bit_p (local_md, uregno)
&& bitmap_bit_p (local_lr, uregno))
use_def_ref[DF_REF_ID (use)] = reg_defs[uregno];
}
}
static void
process_defs (df_ref def, int top_flag)
{
for (; def; def = DF_REF_NEXT_LOC (def))
{
df_ref curr_def = reg_defs[DF_REF_REGNO (def)];
unsigned int dregno;
if ((DF_REF_FLAGS (def) & DF_REF_AT_TOP) != top_flag)
continue;
dregno = DF_REF_REGNO (def);
if (curr_def)
reg_defs_stack.safe_push (curr_def);
else
{
/* Do not store anything if "transitioning" from NULL to NULL. But
otherwise, push a special entry on the stack to tell the
leave_block callback that the entry in reg_defs was NULL. */
if (DF_REF_FLAGS (def) & DF_MD_GEN_FLAGS)
;
else
reg_defs_stack.safe_push (def);
}
if (DF_REF_FLAGS (def) & DF_MD_GEN_FLAGS)
{
bitmap_set_bit (local_md, dregno);
reg_defs[dregno] = NULL;
}
else
{
bitmap_clear_bit (local_md, dregno);
reg_defs[dregno] = def;
}
}
}
static void
union_match_dups (rtx insn, struct web_entry *def_entry,
struct web_entry *use_entry,
bool (*fun) (struct web_entry *, struct web_entry *))
{
struct df_insn_info *insn_info = DF_INSN_INFO_GET (insn);
df_ref use_link = DF_INSN_INFO_USES (insn_info);
df_ref def_link = DF_INSN_INFO_DEFS (insn_info);
struct web_entry *dup_entry;
int i;
extract_insn (insn);
for (i = 0; i < recog_data.n_dups; i++)
{
int op = recog_data.dup_num[i];
enum op_type type = recog_data.operand_type[op];
df_ref ref, dupref;
struct web_entry *entry;
dup_entry = use_entry;
for (dupref = use_link; dupref; dupref = DF_REF_NEXT_LOC (dupref))
if (DF_REF_LOC (dupref) == recog_data.dup_loc[i])
break;
if (dupref == NULL && type == OP_INOUT)
{
dup_entry = def_entry;
for (dupref = def_link; dupref; dupref = DF_REF_NEXT_LOC (dupref))
if (DF_REF_LOC (dupref) == recog_data.dup_loc[i])
break;
}
/* ??? *DUPREF can still be zero, because when an operand matches
a memory, DF_REF_LOC (use_link[n]) points to the register part
of the address, whereas recog_data.dup_loc[m] points to the
entire memory ref, thus we fail to find the duplicate entry,
even though it is there.
Example: i686-pc-linux-gnu gcc.c-torture/compile/950607-1.c
-O3 -fomit-frame-pointer -funroll-loops */
if (dupref == NULL
|| DF_REF_REGNO (dupref) < FIRST_PSEUDO_REGISTER)
continue;
ref = type == OP_IN ? use_link : def_link;
entry = type == OP_IN ? use_entry : def_entry;
for (; ref; ref = DF_REF_NEXT_LOC (ref))
{
rtx *l = DF_REF_LOC (ref);
if (l == recog_data.operand_loc[op])
break;
if (l && DF_REF_REAL_LOC (ref) == recog_data.operand_loc[op])
break;
}
if (!ref && type == OP_INOUT)
{
entry = use_entry;
for (ref = use_link; ref; ref = DF_REF_NEXT_LOC (ref))
{
rtx *l = DF_REF_LOC (ref);
if (l == recog_data.operand_loc[op])
break;
if (l && DF_REF_REAL_LOC (ref) == recog_data.operand_loc[op])
break;
}
}
gcc_assert (ref);
(*fun) (dup_entry + DF_REF_ID (dupref), entry + DF_REF_ID (ref));
}
}
