aboutsummaryrefslogtreecommitdiff
path: root/gcc/function.c
diff options
context:
space:
mode:
Diffstat (limited to 'gcc/function.c')
-rw-r--r--gcc/function.c131
1 files changed, 66 insertions, 65 deletions
diff --git a/gcc/function.c b/gcc/function.c
index 7360022..b3f5cbf 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -932,59 +932,60 @@ find_temp_slot_from_address (rtx x)
return 0;
}
-/* Indicate that NEW is an alternate way of referring to the temp slot
- that previously was known by OLD. */
+/* Indicate that NEW_RTX is an alternate way of referring to the temp
+ slot that previously was known by OLD_RTX. */
void
-update_temp_slot_address (rtx old, rtx new)
+update_temp_slot_address (rtx old_rtx, rtx new_rtx)
{
struct temp_slot *p;
- if (rtx_equal_p (old, new))
+ if (rtx_equal_p (old_rtx, new_rtx))
return;
- p = find_temp_slot_from_address (old);
+ p = find_temp_slot_from_address (old_rtx);
- /* If we didn't find one, see if both OLD is a PLUS. If so, and NEW
- is a register, see if one operand of the PLUS is a temporary
- location. If so, NEW points into it. Otherwise, if both OLD and
- NEW are a PLUS and if there is a register in common between them.
- If so, try a recursive call on those values. */
+ /* If we didn't find one, see if both OLD_RTX is a PLUS. If so, and
+ NEW_RTX is a register, see if one operand of the PLUS is a
+ temporary location. If so, NEW_RTX points into it. Otherwise,
+ if both OLD_RTX and NEW_RTX are a PLUS and if there is a register
+ in common between them. If so, try a recursive call on those
+ values. */
if (p == 0)
{
- if (GET_CODE (old) != PLUS)
+ if (GET_CODE (old_rtx) != PLUS)
return;
- if (REG_P (new))
+ if (REG_P (new_rtx))
{
- update_temp_slot_address (XEXP (old, 0), new);
- update_temp_slot_address (XEXP (old, 1), new);
+ update_temp_slot_address (XEXP (old_rtx, 0), new_rtx);
+ update_temp_slot_address (XEXP (old_rtx, 1), new_rtx);
return;
}
- else if (GET_CODE (new) != PLUS)
+ else if (GET_CODE (new_rtx) != PLUS)
return;
- if (rtx_equal_p (XEXP (old, 0), XEXP (new, 0)))
- update_temp_slot_address (XEXP (old, 1), XEXP (new, 1));
- else if (rtx_equal_p (XEXP (old, 1), XEXP (new, 0)))
- update_temp_slot_address (XEXP (old, 0), XEXP (new, 1));
- else if (rtx_equal_p (XEXP (old, 0), XEXP (new, 1)))
- update_temp_slot_address (XEXP (old, 1), XEXP (new, 0));
- else if (rtx_equal_p (XEXP (old, 1), XEXP (new, 1)))
- update_temp_slot_address (XEXP (old, 0), XEXP (new, 0));
+ if (rtx_equal_p (XEXP (old_rtx, 0), XEXP (new_rtx, 0)))
+ update_temp_slot_address (XEXP (old_rtx, 1), XEXP (new_rtx, 1));
+ else if (rtx_equal_p (XEXP (old_rtx, 1), XEXP (new_rtx, 0)))
+ update_temp_slot_address (XEXP (old_rtx, 0), XEXP (new_rtx, 1));
+ else if (rtx_equal_p (XEXP (old_rtx, 0), XEXP (new_rtx, 1)))
+ update_temp_slot_address (XEXP (old_rtx, 1), XEXP (new_rtx, 0));
+ else if (rtx_equal_p (XEXP (old_rtx, 1), XEXP (new_rtx, 1)))
+ update_temp_slot_address (XEXP (old_rtx, 0), XEXP (new_rtx, 0));
return;
}
/* Otherwise add an alias for the temp's address. */
else if (p->address == 0)
- p->address = new;
+ p->address = new_rtx;
else
{
if (GET_CODE (p->address) != EXPR_LIST)
p->address = gen_rtx_EXPR_LIST (VOIDmode, p->address, NULL_RTX);
- p->address = gen_rtx_EXPR_LIST (VOIDmode, new, p->address);
+ p->address = gen_rtx_EXPR_LIST (VOIDmode, new_rtx, p->address);
}
}
@@ -1210,7 +1211,7 @@ static int cfa_offset;
static rtx
instantiate_new_reg (rtx x, HOST_WIDE_INT *poffset)
{
- rtx new;
+ rtx new_rtx;
HOST_WIDE_INT offset;
if (x == virtual_incoming_args_rtx)
@@ -1219,24 +1220,24 @@ instantiate_new_reg (rtx x, HOST_WIDE_INT *poffset)
{
/* Replace virtual_incoming_args_rtx with internal arg
pointer if DRAP is used to realign stack. */
- new = crtl->args.internal_arg_pointer;
+ new_rtx = crtl->args.internal_arg_pointer;
offset = 0;
}
else
- new = arg_pointer_rtx, offset = in_arg_offset;
+ new_rtx = arg_pointer_rtx, offset = in_arg_offset;
}
else if (x == virtual_stack_vars_rtx)
- new = frame_pointer_rtx, offset = var_offset;
+ new_rtx = frame_pointer_rtx, offset = var_offset;
else if (x == virtual_stack_dynamic_rtx)
- new = stack_pointer_rtx, offset = dynamic_offset;
+ new_rtx = stack_pointer_rtx, offset = dynamic_offset;
else if (x == virtual_outgoing_args_rtx)
- new = stack_pointer_rtx, offset = out_arg_offset;
+ new_rtx = stack_pointer_rtx, offset = out_arg_offset;
else if (x == virtual_cfa_rtx)
{
#ifdef FRAME_POINTER_CFA_OFFSET
- new = frame_pointer_rtx;
+ new_rtx = frame_pointer_rtx;
#else
- new = arg_pointer_rtx;
+ new_rtx = arg_pointer_rtx;
#endif
offset = cfa_offset;
}
@@ -1244,7 +1245,7 @@ instantiate_new_reg (rtx x, HOST_WIDE_INT *poffset)
return NULL_RTX;
*poffset = offset;
- return new;
+ return new_rtx;
}
/* A subroutine of instantiate_virtual_regs, called via for_each_rtx.
@@ -1258,7 +1259,7 @@ instantiate_virtual_regs_in_rtx (rtx *loc, void *data)
{
HOST_WIDE_INT offset;
bool *changed = (bool *) data;
- rtx x, new;
+ rtx x, new_rtx;
x = *loc;
if (x == 0)
@@ -1267,21 +1268,21 @@ instantiate_virtual_regs_in_rtx (rtx *loc, void *data)
switch (GET_CODE (x))
{
case REG:
- new = instantiate_new_reg (x, &offset);
- if (new)
+ new_rtx = instantiate_new_reg (x, &offset);
+ if (new_rtx)
{
- *loc = plus_constant (new, offset);
+ *loc = plus_constant (new_rtx, offset);
if (changed)
*changed = true;
}
return -1;
case PLUS:
- new = instantiate_new_reg (XEXP (x, 0), &offset);
- if (new)
+ new_rtx = instantiate_new_reg (XEXP (x, 0), &offset);
+ if (new_rtx)
{
- new = plus_constant (new, offset);
- *loc = simplify_gen_binary (PLUS, GET_MODE (x), new, XEXP (x, 1));
+ new_rtx = plus_constant (new_rtx, offset);
+ *loc = simplify_gen_binary (PLUS, GET_MODE (x), new_rtx, XEXP (x, 1));
if (changed)
*changed = true;
return -1;
@@ -1327,7 +1328,7 @@ instantiate_virtual_regs_in_insn (rtx insn)
HOST_WIDE_INT offset;
int insn_code, i;
bool any_change = false;
- rtx set, new, x, seq;
+ rtx set, new_rtx, x, seq;
/* There are some special cases to be handled first. */
set = single_set (insn);
@@ -1337,17 +1338,17 @@ instantiate_virtual_regs_in_insn (rtx insn)
to mean that the underlying register gets assigned the inverse
transformation. This is used, for example, in the handling of
non-local gotos. */
- new = instantiate_new_reg (SET_DEST (set), &offset);
- if (new)
+ new_rtx = instantiate_new_reg (SET_DEST (set), &offset);
+ if (new_rtx)
{
start_sequence ();
for_each_rtx (&SET_SRC (set), instantiate_virtual_regs_in_rtx, NULL);
- x = simplify_gen_binary (PLUS, GET_MODE (new), SET_SRC (set),
+ x = simplify_gen_binary (PLUS, GET_MODE (new_rtx), SET_SRC (set),
GEN_INT (-offset));
- x = force_operand (x, new);
- if (x != new)
- emit_move_insn (new, x);
+ x = force_operand (x, new_rtx);
+ if (x != new_rtx)
+ emit_move_insn (new_rtx, x);
seq = get_insns ();
end_sequence ();
@@ -1361,15 +1362,15 @@ instantiate_virtual_regs_in_insn (rtx insn)
new add insn. The difference between this and falling through
to the generic case is avoiding a new pseudo and eliminating a
move insn in the initial rtl stream. */
- new = instantiate_new_reg (SET_SRC (set), &offset);
- if (new && offset != 0
+ new_rtx = instantiate_new_reg (SET_SRC (set), &offset);
+ if (new_rtx && offset != 0
&& REG_P (SET_DEST (set))
&& REGNO (SET_DEST (set)) > LAST_VIRTUAL_REGISTER)
{
start_sequence ();
x = expand_simple_binop (GET_MODE (SET_DEST (set)), PLUS,
- new, GEN_INT (offset), SET_DEST (set),
+ new_rtx, GEN_INT (offset), SET_DEST (set),
1, OPTAB_LIB_WIDEN);
if (x != SET_DEST (set))
emit_move_insn (SET_DEST (set), x);
@@ -1392,7 +1393,7 @@ instantiate_virtual_regs_in_insn (rtx insn)
&& recog_data.operand_loc[1] == &XEXP (SET_SRC (set), 0)
&& recog_data.operand_loc[2] == &XEXP (SET_SRC (set), 1)
&& GET_CODE (recog_data.operand[2]) == CONST_INT
- && (new = instantiate_new_reg (recog_data.operand[1], &offset)))
+ && (new_rtx = instantiate_new_reg (recog_data.operand[1], &offset)))
{
offset += INTVAL (recog_data.operand[2]);
@@ -1402,7 +1403,7 @@ instantiate_virtual_regs_in_insn (rtx insn)
&& REGNO (SET_DEST (set)) > LAST_VIRTUAL_REGISTER)
{
start_sequence ();
- emit_move_insn (SET_DEST (set), new);
+ emit_move_insn (SET_DEST (set), new_rtx);
seq = get_insns ();
end_sequence ();
@@ -1416,10 +1417,10 @@ instantiate_virtual_regs_in_insn (rtx insn)
/* Using validate_change and apply_change_group here leaves
recog_data in an invalid state. Since we know exactly what
we want to check, do those two by hand. */
- if (safe_insn_predicate (insn_code, 1, new)
+ if (safe_insn_predicate (insn_code, 1, new_rtx)
&& safe_insn_predicate (insn_code, 2, x))
{
- *recog_data.operand_loc[1] = recog_data.operand[1] = new;
+ *recog_data.operand_loc[1] = recog_data.operand[1] = new_rtx;
*recog_data.operand_loc[2] = recog_data.operand[2] = x;
any_change = true;
@@ -1474,11 +1475,11 @@ instantiate_virtual_regs_in_insn (rtx insn)
break;
case REG:
- new = instantiate_new_reg (x, &offset);
- if (new == NULL)
+ new_rtx = instantiate_new_reg (x, &offset);
+ if (new_rtx == NULL)
continue;
if (offset == 0)
- x = new;
+ x = new_rtx;
else
{
start_sequence ();
@@ -1489,7 +1490,7 @@ instantiate_virtual_regs_in_insn (rtx insn)
/* ??? Recognize address_operand and/or "p" constraints
to see if (plus new offset) is a valid before we put
this through expand_simple_binop. */
- x = expand_simple_binop (GET_MODE (x), PLUS, new,
+ x = expand_simple_binop (GET_MODE (x), PLUS, new_rtx,
GEN_INT (offset), NULL_RTX,
1, OPTAB_LIB_WIDEN);
seq = get_insns ();
@@ -1499,21 +1500,21 @@ instantiate_virtual_regs_in_insn (rtx insn)
break;
case SUBREG:
- new = instantiate_new_reg (SUBREG_REG (x), &offset);
- if (new == NULL)
+ new_rtx = instantiate_new_reg (SUBREG_REG (x), &offset);
+ if (new_rtx == NULL)
continue;
if (offset != 0)
{
start_sequence ();
- new = expand_simple_binop (GET_MODE (new), PLUS, new,
+ new_rtx = expand_simple_binop (GET_MODE (new_rtx), PLUS, new_rtx,
GEN_INT (offset), NULL_RTX,
1, OPTAB_LIB_WIDEN);
seq = get_insns ();
end_sequence ();
emit_insn_before (seq, insn);
}
- x = simplify_gen_subreg (recog_data.operand_mode[i], new,
- GET_MODE (new), SUBREG_BYTE (x));
+ x = simplify_gen_subreg (recog_data.operand_mode[i], new_rtx,
+ GET_MODE (new_rtx), SUBREG_BYTE (x));
break;
default:
generated by cgit v1.1 at 2025-06-04 08:03:57 +0000