#include "hash.h"
#include "ggc.h"
#include "tm_p.h"
+#include "integrate.h"
#ifndef TRAMPOLINE_ALIGNMENT
#define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
int current_function_uses_only_leaf_regs;
/* Nonzero once virtual register instantiation has been done.
- assign_stack_local uses frame_pointer_rtx when this is nonzero. */
-static int virtuals_instantiated;
+ assign_stack_local uses frame_pointer_rtx when this is nonzero.
+ calls.c:emit_library_call_value_1 uses it to set up
+ post-instantiation libcalls. */
+int virtuals_instantiated;
/* These variables hold pointers to functions to create and destroy
target specific, per-function data structures. */
end_sequence ();
}
}
-
- /* Scan the catch clauses for exception handling too. */
- push_to_full_sequence (catch_clauses, catch_clauses_last);
- fixup_var_refs_insns (catch_clauses, var, promoted_mode, unsignedp, 0);
- end_full_sequence (&catch_clauses, &catch_clauses_last);
}
\f
/* REPLACEMENTS is a pointer to a list of the struct fixup_replacement and X is
rtx insn = XEXP (insn_list, 0);
if (INSN_P (insn))
- fixup_var_refs_insn (insn, var, promoted_mode, unsignedp, 0);
+ fixup_var_refs_insn (insn, var, promoted_mode, unsignedp, 1);
insn_list = XEXP (insn_list, 1);
}
{
replacement = find_fixup_replacement (replacements, var);
if (replacement->new == 0)
- replacement->new = gen_reg_rtx (GET_MODE (var));
+ replacement->new = gen_reg_rtx (promoted_mode);
SUBREG_REG (x) = replacement->new;
return;
}
optimize_bit_field (x, insn, 0);
if (GET_CODE (SET_SRC (x)) == SIGN_EXTRACT
|| GET_CODE (SET_SRC (x)) == ZERO_EXTRACT)
- optimize_bit_field (x, insn, NULL_PTR);
+ optimize_bit_field (x, insn, 0);
/* For a paradoxical SUBREG inside a ZERO_EXTRACT, load the object
into a register and then store it back out. */
dest = XEXP (dest, 0);
if (GET_CODE (src) == SUBREG)
- src = XEXP (src, 0);
+ src = SUBREG_REG (src);
/* If VAR does not appear at the top level of the SET
just scan the lower levels of the tree. */
rtx insn;
int uncritical;
{
- int offset = SUBREG_WORD (x) * UNITS_PER_WORD;
+ int offset = SUBREG_BYTE (x);
rtx addr = XEXP (SUBREG_REG (x), 0);
enum machine_mode mode = GET_MODE (x);
rtx result;
&& ! uncritical)
abort ();
- if (BYTES_BIG_ENDIAN)
- offset += (MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))
- - MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode)));
addr = plus_constant (addr, offset);
if (!flag_force_addr && memory_address_p (mode, addr))
/* Shortcut if no insns need be emitted. */
offset /= BITS_PER_UNIT;
if (GET_CODE (XEXP (bitfield, 0)) == SUBREG)
{
- offset += SUBREG_WORD (XEXP (bitfield, 0)) * UNITS_PER_WORD;
+ offset += (SUBREG_BYTE (XEXP (bitfield, 0))
+ / UNITS_PER_WORD) * UNITS_PER_WORD;
if (BYTES_BIG_ENDIAN)
offset -= (MIN (UNITS_PER_WORD,
GET_MODE_SIZE (GET_MODE (XEXP (bitfield, 0))))
{
rtx src = SET_SRC (body);
while (GET_CODE (src) == SUBREG
- && SUBREG_WORD (src) == 0)
+ && SUBREG_BYTE (src) == 0)
src = SUBREG_REG (src);
if (GET_MODE (src) != GET_MODE (memref))
src = gen_lowpart (GET_MODE (memref), SET_SRC (body));
rtx dest = SET_DEST (body);
while (GET_CODE (dest) == SUBREG
- && SUBREG_WORD (dest) == 0
+ && SUBREG_BYTE (dest) == 0
&& (GET_MODE_CLASS (GET_MODE (dest))
== GET_MODE_CLASS (GET_MODE (SUBREG_REG (dest))))
&& (GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
if (decl)
{
tree type = TREE_TYPE (decl);
+ enum machine_mode decl_mode
+ = (TREE_CODE (decl) == SAVE_EXPR ? TYPE_MODE (TREE_TYPE (decl))
+ : DECL_MODE (decl));
- PUT_MODE (reg, DECL_MODE (decl));
+ PUT_MODE (reg, decl_mode);
MEM_VOLATILE_P (reg) = TREE_SIDE_EFFECTS (decl);
MEM_SET_IN_STRUCT_P (reg, AGGREGATE_TYPE_P (type));
MEM_ALIAS_SET (reg) = get_alias_set (decl);
result &= purge_addressof_1 (&SET_SRC (x), insn, force, 0, ht);
return result;
}
-
- else if (code == ADDRESSOF && GET_CODE (XEXP (x, 0)) == MEM)
+ else if (code == ADDRESSOF)
{
+ rtx sub, insns;
+
+ if (GET_CODE (XEXP (x, 0)) != MEM)
+ {
+ put_addressof_into_stack (x, ht);
+ return true;
+ }
+
/* We must create a copy of the rtx because it was created by
overwriting a REG rtx which is always shared. */
- rtx sub = copy_rtx (XEXP (XEXP (x, 0), 0));
- rtx insns;
-
+ sub = copy_rtx (XEXP (XEXP (x, 0), 0));
if (validate_change (insn, loc, sub, 0)
|| validate_replace_rtx (x, sub, insn))
return true;
code did. This is especially true of
REG_RETVAL. */
- if (GET_CODE (z) == SUBREG && SUBREG_WORD (z) == 0)
+ if (GET_CODE (z) == SUBREG && SUBREG_BYTE (z) == 0)
z = SUBREG_REG (z);
if (GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD
}
goto restart;
}
- give_up:;
- /* else give up and put it into the stack */
- }
-
- else if (code == ADDRESSOF)
- {
- put_addressof_into_stack (x, ht);
- return true;
- }
- else if (code == SET)
- {
- result = purge_addressof_1 (&SET_DEST (x), insn, force, 1, ht);
- result &= purge_addressof_1 (&SET_SRC (x), insn, force, 0, ht);
- return result;
}
+ give_up:
/* Scan all subexpressions. */
fmt = GET_RTX_FORMAT (code);
for (i = 0; i < GET_RTX_LENGTH (code); i++, fmt++)
{
rtx reg = SET_DEST (pattern);
enum machine_mode mode = GET_MODE (SET_DEST (pattern));
- int word = 0;
-
- while (GET_CODE (reg) == SUBREG)
+ int offset = 0;
+
+ if (GET_CODE (reg) == SUBREG && GET_CODE (SUBREG_REG (reg)) == REG
+ && REGNO (SUBREG_REG (reg)) < FIRST_PSEUDO_REGISTER)
{
- word += SUBREG_WORD (reg);
+ offset = subreg_regno_offset (REGNO (SUBREG_REG (reg)),
+ GET_MODE (SUBREG_REG (reg)),
+ SUBREG_BYTE (reg),
+ GET_MODE (reg));
reg = SUBREG_REG (reg);
}
-
- if (REGNO (reg) < FIRST_PSEUDO_REGISTER)
+
+
+ if (GET_CODE (reg) == REG && REGNO (reg) < FIRST_PSEUDO_REGISTER)
{
- reg = gen_rtx_REG (mode, REGNO (reg) + word);
+ reg = gen_rtx_REG (mode, REGNO (reg) + offset);
SET_DEST (pattern) = reg;
}
}
push_to_sequence (conversion_insns);
tempreg = convert_to_mode (nominal_mode, tempreg, unsignedp);
+ if (GET_CODE (tempreg) == SUBREG
+ && GET_MODE (tempreg) == nominal_mode
+ && GET_CODE (SUBREG_REG (tempreg)) == REG
+ && nominal_mode == passed_mode
+ && GET_MODE (SUBREG_REG (tempreg)) == GET_MODE (entry_parm)
+ && GET_MODE_SIZE (GET_MODE (tempreg))
+ < GET_MODE_SIZE (GET_MODE (entry_parm)))
+ {
+ /* The argument is already sign/zero extended, so note it
+ into the subreg. */
+ SUBREG_PROMOTED_VAR_P (tempreg) = 1;
+ SUBREG_PROMOTED_UNSIGNED_P (tempreg) = unsignedp;
+ }
+
/* TREE_USED gets set erroneously during expand_assignment. */
save_tree_used = TREE_USED (parm);
expand_assignment (parm,
/* Make sure first insn is a note even if we don't want linenums.
This makes sure the first insn will never be deleted.
Also, final expects a note to appear there. */
- emit_note (NULL_PTR, NOTE_INSN_DELETED);
+ emit_note (NULL, NOTE_INSN_DELETED);
/* Set flags used by final.c. */
if (aggregate_value_p (DECL_RESULT (subr)))
\f
extern struct obstack permanent_obstack;
+/* The PENDING_SIZES represent the sizes of variable-sized types.
+ Create RTL for the various sizes now (using temporary variables),
+ so that we can refer to the sizes from the RTL we are generating
+ for the current function. The PENDING_SIZES are a TREE_LIST. The
+ TREE_VALUE of each node is a SAVE_EXPR. */
+
+void
+expand_pending_sizes (pending_sizes)
+ tree pending_sizes;
+{
+ tree tem;
+
+ /* Evaluate now the sizes of any types declared among the arguments. */
+ for (tem = pending_sizes; tem; tem = TREE_CHAIN (tem))
+ {
+ expand_expr (TREE_VALUE (tem), const0_rtx, VOIDmode,
+ EXPAND_MEMORY_USE_BAD);
+ /* Flush the queue in case this parameter declaration has
+ side-effects. */
+ emit_queue ();
+ }
+}
+
/* Start the RTL for a new function, and set variables used for
emitting RTL.
SUBR is the FUNCTION_DECL node.
else
cleanup_label = 0;
- /* Make the label for return statements to jump to, if this machine
- does not have a one-instruction return and uses an epilogue,
- or if it returns a structure, or if it has parm cleanups. */
-#ifdef HAVE_return
- if (cleanup_label == 0 && HAVE_return
- && ! current_function_instrument_entry_exit
- && ! current_function_returns_pcc_struct
- && ! (current_function_returns_struct && ! optimize))
- return_label = 0;
- else
- return_label = gen_label_rtx ();
-#else
+ /* Make the label for return statements to jump to. Do not special
+ case machines with special return instructions -- they will be
+ handled later during jump, ifcvt, or epilogue creation. */
return_label = gen_label_rtx ();
-#endif
/* Initialize rtx used to return the value. */
/* Do this before assign_parms so that we copy the struct value address
else if (DECL_MODE (DECL_RESULT (subr)) == VOIDmode)
/* If return mode is void, this decl rtl should not be used. */
SET_DECL_RTL (DECL_RESULT (subr), NULL_RTX);
- else if (parms_have_cleanups || current_function_instrument_entry_exit)
- {
- /* If function will end with cleanup code for parms,
- compute the return values into a pseudo reg,
- which we will copy into the true return register
- after the cleanups are done. */
-
- enum machine_mode mode = DECL_MODE (DECL_RESULT (subr));
-
-#ifdef PROMOTE_FUNCTION_RETURN
- tree type = TREE_TYPE (DECL_RESULT (subr));
- int unsignedp = TREE_UNSIGNED (type);
-
- mode = promote_mode (type, mode, &unsignedp, 1);
-#endif
-
- SET_DECL_RTL (DECL_RESULT (subr), gen_reg_rtx (mode));
- /* Needed because we may need to move this to memory
- in case it's a named return value whose address is taken. */
- DECL_REGISTER (DECL_RESULT (subr)) = 1;
- }
else
{
- /* Scalar, returned in a register. */
- SET_DECL_RTL (DECL_RESULT (subr),
- hard_function_value (TREE_TYPE (DECL_RESULT (subr)),
- subr, 1));
-
- /* Mark this reg as the function's return value. */
- if (GET_CODE (DECL_RTL (DECL_RESULT (subr))) == REG)
+ /* Compute the return values into a pseudo reg, which we will copy
+ into the true return register after the cleanups are done. */
+
+ /* In order to figure out what mode to use for the pseudo, we
+ figure out what the mode of the eventual return register will
+ actually be, and use that. */
+ rtx hard_reg
+ = hard_function_value (TREE_TYPE (DECL_RESULT (subr)),
+ subr, 1);
+
+ /* Structures that are returned in registers are not aggregate_value_p,
+ so we may see a PARALLEL. Don't play pseudo games with this. */
+ if (! REG_P (hard_reg))
+ SET_DECL_RTL (DECL_RESULT (subr), hard_reg);
+ else
{
- REG_FUNCTION_VALUE_P (DECL_RTL (DECL_RESULT (subr))) = 1;
+ /* Create the pseudo. */
+ SET_DECL_RTL (DECL_RESULT (subr), gen_reg_rtx (GET_MODE (hard_reg)));
+
/* Needed because we may need to move this to memory
in case it's a named return value whose address is taken. */
DECL_REGISTER (DECL_RESULT (subr)) = 1;
The move is supposed to make sdb output more accurate. */
/* Indicate the beginning of the function body,
as opposed to parm setup. */
- emit_note (NULL_PTR, NOTE_INSN_FUNCTION_BEG);
+ emit_note (NULL, NOTE_INSN_FUNCTION_BEG);
if (GET_CODE (get_last_insn ()) != NOTE)
- emit_note (NULL_PTR, NOTE_INSN_DELETED);
+ emit_note (NULL, NOTE_INSN_DELETED);
parm_birth_insn = get_last_insn ();
context_display = 0;
/* After the display initializations is where the tail-recursion label
should go, if we end up needing one. Ensure we have a NOTE here
since some things (like trampolines) get placed before this. */
- tail_recursion_reentry = emit_note (NULL_PTR, NOTE_INSN_DELETED);
+ tail_recursion_reentry = emit_note (NULL, NOTE_INSN_DELETED);
/* Evaluate now the sizes of any types declared among the arguments. */
- for (tem = nreverse (get_pending_sizes ()); tem; tem = TREE_CHAIN (tem))
- {
- expand_expr (TREE_VALUE (tem), const0_rtx, VOIDmode,
- EXPAND_MEMORY_USE_BAD);
- /* Flush the queue in case this parameter declaration has
- side-effects. */
- emit_queue ();
- }
+ expand_pending_sizes (nreverse (get_pending_sizes ()));
/* Make sure there is a line number after the function entry setup code. */
force_next_line_note ();
void *arg;
{
rtx outgoing = current_function_return_rtx;
- int pcc;
if (! outgoing)
return;
- pcc = (current_function_returns_struct
- || current_function_returns_pcc_struct);
-
- if ((GET_CODE (outgoing) == REG
- && REGNO (outgoing) >= FIRST_PSEUDO_REGISTER)
- || pcc)
- {
- tree type = TREE_TYPE (DECL_RESULT (current_function_decl));
-
- /* A PCC-style return returns a pointer to the memory in which
- the structure is stored. */
- if (pcc)
- type = build_pointer_type (type);
-
-#ifdef FUNCTION_OUTGOING_VALUE
- outgoing = FUNCTION_OUTGOING_VALUE (type, current_function_decl);
-#else
- outgoing = FUNCTION_VALUE (type, current_function_decl);
-#endif
- /* If this is a BLKmode structure being returned in registers, then use
- the mode computed in expand_return. */
- if (GET_MODE (outgoing) == BLKmode)
- PUT_MODE (outgoing, GET_MODE (current_function_return_rtx));
- REG_FUNCTION_VALUE_P (outgoing) = 1;
- }
-
if (GET_CODE (outgoing) == REG)
(*doit) (outgoing, arg);
else if (GET_CODE (outgoing) == PARALLEL)
clobber_return_register ()
{
diddle_return_value (do_clobber_return_reg, NULL);
+
+ /* In case we do use pseudo to return value, clobber it too. */
+ if (DECL_RTL_SET_P (DECL_RESULT (current_function_decl)))
+ {
+ tree decl_result = DECL_RESULT (current_function_decl);
+ rtx decl_rtl = DECL_RTL (decl_result);
+ if (REG_P (decl_rtl) && REGNO (decl_rtl) >= FIRST_PSEUDO_REGISTER)
+ {
+ do_clobber_return_reg (decl_rtl, NULL);
+ }
+ }
}
static void
int end_bindings;
{
tree link;
+ rtx clobber_after;
#ifdef TRAMPOLINE_TEMPLATE
static rtx initial_trampoline;
/* Mark the end of the function body.
If control reaches this insn, the function can drop through
without returning a value. */
- emit_note (NULL_PTR, NOTE_INSN_FUNCTION_END);
+ emit_note (NULL, NOTE_INSN_FUNCTION_END);
/* Must mark the last line number note in the function, so that the test
coverage code can avoid counting the last line twice. This just tells
already exists a copy of this note somewhere above. This line number
note is still needed for debugging though, so we can't delete it. */
if (flag_test_coverage)
- emit_note (NULL_PTR, NOTE_INSN_REPEATED_LINE_NUMBER);
+ emit_note (NULL, NOTE_INSN_REPEATED_LINE_NUMBER);
/* Output a linenumber for the end of the function.
SDB depends on this. */
emit_line_note_force (filename, line);
+ /* Before the return label (if any), clobber the return
+ registers so that they are not propogated live to the rest of
+ the function. This can only happen with functions that drop
+ through; if there had been a return statement, there would
+ have either been a return rtx, or a jump to the return label.
+
+ We delay actual code generation after the current_function_value_rtx
+ is computed. */
+ clobber_after = get_last_insn ();
+
/* Output the label for the actual return from the function,
if one is expected. This happens either because a function epilogue
is used instead of a return instruction, or because a return was done
with a goto in order to run local cleanups, or because of pcc-style
structure returning. */
-
if (return_label)
- {
- rtx before, after;
-
- /* Before the return label, clobber the return registers so that
- they are not propogated live to the rest of the function. This
- can only happen with functions that drop through; if there had
- been a return statement, there would have either been a return
- rtx, or a jump to the return label. */
-
- before = get_last_insn ();
- clobber_return_register ();
- after = get_last_insn ();
-
- if (before != after)
- cfun->x_clobber_return_insn = after;
-
- emit_label (return_label);
- }
+ emit_label (return_label);
/* C++ uses this. */
if (end_bindings)
expand_end_bindings (0, 0, 0);
- /* Now handle any leftover exception regions that may have been
- created for the parameters. */
- {
- rtx last = get_last_insn ();
- rtx label;
-
- expand_leftover_cleanups ();
-
- /* If there are any catch_clauses remaining, output them now. */
- emit_insns (catch_clauses);
- catch_clauses = catch_clauses_last = NULL_RTX;
- /* If the above emitted any code, may sure we jump around it. */
- if (last != get_last_insn ())
- {
- label = gen_label_rtx ();
- last = emit_jump_insn_after (gen_jump (label), last);
- last = emit_barrier_after (last);
- emit_label (label);
- }
- }
-
if (current_function_instrument_entry_exit)
{
rtx fun = DECL_RTL (current_function_decl);
Pmode);
}
+ /* Let except.c know where it should emit the call to unregister
+ the function context for sjlj exceptions. */
+ if (flag_exceptions && USING_SJLJ_EXCEPTIONS)
+ sjlj_emit_function_exit_after (get_last_insn ());
+
/* If we had calls to alloca, and this machine needs
an accurate stack pointer to exit the function,
insert some code to save and restore the stack pointer. */
convert_move (real_decl_rtl, decl_rtl, unsignedp);
}
+ else if (GET_CODE (real_decl_rtl) == PARALLEL)
+ emit_group_load (real_decl_rtl, decl_rtl,
+ int_size_in_bytes (TREE_TYPE (decl_result)),
+ TYPE_ALIGN (TREE_TYPE (decl_result)));
else
emit_move_insn (real_decl_rtl, decl_rtl);
current_function_return_rtx = outgoing;
}
+ /* If this is an implementation of throw, do what's necessary to
+ communicate between __builtin_eh_return and the epilogue. */
+ expand_eh_return ();
+
+ /* Emit the actual code to clobber return register. */
+ {
+ rtx seq, after;
+
+ start_sequence ();
+ clobber_return_register ();
+ seq = gen_sequence ();
+ end_sequence ();
+
+ after = emit_insn_after (seq, clobber_after);
+
+ if (clobber_after != after)
+ cfun->x_clobber_return_insn = after;
+ }
+
/* ??? This should no longer be necessary since stupid is no longer with
us, but there are some parts of the compiler (eg reload_combine, and
sh mach_dep_reorg) that still try and compute their own lifetime info
instead of using the general framework. */
use_return_register ();
- /* If this is an implementation of __throw, do what's necessary to
- communicate between __builtin_eh_return and the epilogue. */
- expand_eh_return ();
-
/* Output a return insn if we are using one.
Otherwise, let the rtl chain end here, to drop through
into the epilogue. */
ggc_mark_rtx (p->x_nonlocal_goto_handler_labels);
ggc_mark_rtx (p->x_nonlocal_goto_stack_level);
ggc_mark_tree (p->x_nonlocal_labels);
+
+ mark_hard_reg_initial_vals (p);
}
/* Mark the function chain ARG (which is really a struct function **)
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