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Revert this patch:

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2000-03-04  Mark Mitchell  <mark@codesourcery.com>

From-SVN: r32343
This commit is contained in:
Mark Mitchell 2000-03-05 19:34:29 +00:00 committed by Mark Mitchell
parent 2f6f9ac7b6
commit 591ccf92b3
9 changed files with 89 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2000-03-05 Mark Mitchell <mark@codesourcery.com>
Revert this patch:
2000-03-04 Mark Mitchell <mark@codesourcery.com>
2000-03-04 Thomas Schuster <Thomas.Schuster@gmx.net>
* regmove.c (copy_src_to_dest) Do not create src->dest move

20
gcc/emit-rtl.c
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@ -3376,6 +3376,7 @@ start_sequence ()
tem->next = seq_stack;
tem->first = first_insn;
tem->last = last_insn;
tem->sequence_rtl_expr = seq_rtl_expr;
seq_stack = tem;
@ -3383,6 +3384,19 @@ start_sequence ()
last_insn = 0;
}
/* Similarly, but indicate that this sequence will be placed in T, an
RTL_EXPR. See the documentation for start_sequence for more
information about how to use this function. */
void
start_sequence_for_rtl_expr (t)
tree t;
{
start_sequence ();
seq_rtl_expr = t;
}
/* Set up the insn chain starting with FIRST as the current sequence,
saving the previously current one. See the documentation for
start_sequence for more information about how to use this function. */
@ -3416,6 +3430,7 @@ push_topmost_sequence ()
first_insn = top->first;
last_insn = top->last;
seq_rtl_expr = top->sequence_rtl_expr;
}
/* After emitting to the outer-level insn chain, update the outer-level
@ -3431,6 +3446,7 @@ pop_topmost_sequence ()
top->first = first_insn;
top->last = last_insn;
/* ??? Why don't we save seq_rtl_expr here? */
end_sequence ();
}
@ -3455,6 +3471,7 @@ end_sequence ()
first_insn = tem->first;
last_insn = tem->last;
seq_rtl_expr = tem->sequence_rtl_expr;
seq_stack = tem->next;
free (tem);
@ -3743,6 +3760,7 @@ init_emit ()
f->emit = (struct emit_status *) xmalloc (sizeof (struct emit_status));
first_insn = NULL;
last_insn = NULL;
seq_rtl_expr = NULL;
cur_insn_uid = 1;
reg_rtx_no = LAST_VIRTUAL_REGISTER + 1;
last_linenum = 0;
@ -3816,6 +3834,7 @@ mark_sequence_stack (ss)
while (ss)
{
ggc_mark_rtx (ss->first);
ggc_mark_tree (ss->sequence_rtl_expr);
ss = ss->next;
}
}
@ -3837,6 +3856,7 @@ mark_emit_status (es)
ggc_mark_rtx (*r);
mark_sequence_stack (es->sequence_stack);
ggc_mark_tree (es->sequence_rtl_expr);
ggc_mark_rtx (es->x_first_insn);
}

2
gcc/except.c
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@ -2095,7 +2095,7 @@ protect_with_terminate (e)
TREE_TYPE (handler) = void_type_node;
RTL_EXPR_RTL (handler) = const0_rtx;
TREE_SIDE_EFFECTS (handler) = 1;
start_sequence ();
start_sequence_for_rtl_expr (handler);
emit_library_call (terminate_libfunc, 0, VOIDmode, 0);
emit_barrier ();

2
gcc/expr.c
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@ -6306,6 +6306,8 @@ expand_expr (exp, target, tmode, modifier)
emit_insns (RTL_EXPR_SEQUENCE (exp));
RTL_EXPR_SEQUENCE (exp) = const0_rtx;
}
preserve_rtl_expr_result (RTL_EXPR_RTL (exp));
free_temps_for_rtl_expr (exp);
return RTL_EXPR_RTL (exp);
case CONSTRUCTOR:

52
gcc/function.c
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@ -708,6 +708,7 @@ assign_stack_temp_for_type (mode, size, keep, type)
rounded_size));
p->align = best_p->align;
p->address = 0;
p->rtl_expr = 0;
p->next = temp_slots;
temp_slots = p;
@ -775,6 +776,7 @@ assign_stack_temp_for_type (mode, size, keep, type)
p->in_use = 1;
p->addr_taken = 0;
p->rtl_expr = seq_rtl_expr;
if (keep == 2)
{
@ -1127,6 +1129,34 @@ preserve_temp_slots (x)
p->level--;
}
/* X is the result of an RTL_EXPR. If it is a temporary slot associated
with that RTL_EXPR, promote it into a temporary slot at the present
level so it will not be freed when we free slots made in the
RTL_EXPR. */
void
preserve_rtl_expr_result (x)
rtx x;
{
struct temp_slot *p;
/* If X is not in memory or is at a constant address, it cannot be in
a temporary slot. */
if (x == 0 || GET_CODE (x) != MEM || CONSTANT_P (XEXP (x, 0)))
return;
/* If we can find a match, move it to our level unless it is already at
an upper level. */
p = find_temp_slot_from_address (XEXP (x, 0));
if (p != 0)
{
p->level = MIN (p->level, temp_slot_level);
p->rtl_expr = 0;
}
return;
}
/* Free all temporaries used so far. This is normally called at the end
of generating code for a statement. Don't free any temporaries
currently in use for an RTL_EXPR that hasn't yet been emitted.
@ -1140,7 +1170,23 @@ free_temp_slots ()
struct temp_slot *p;
for (p = temp_slots; p; p = p->next)
if (p->in_use && p->level == temp_slot_level && ! p->keep)
if (p->in_use && p->level == temp_slot_level && ! p->keep
&& p->rtl_expr == 0)
p->in_use = 0;
combine_temp_slots ();
}
/* Free all temporary slots used in T, an RTL_EXPR node. */
void
free_temps_for_rtl_expr (t)
tree t;
{
struct temp_slot *p;
for (p = temp_slots; p; p = p->next)
if (p->rtl_expr == t)
p->in_use = 0;
combine_temp_slots ();
@ -1218,7 +1264,7 @@ pop_temp_slots ()
struct temp_slot *p;
for (p = temp_slots; p; p = p->next)
if (p->in_use && p->level == temp_slot_level)
if (p->in_use && p->level == temp_slot_level && p->rtl_expr == 0)
p->in_use = 0;
combine_temp_slots ();
@ -6934,6 +6980,8 @@ mark_temp_slot (t)
{
ggc_mark_rtx (t->slot);
ggc_mark_rtx (t->address);
ggc_mark_tree (t->rtl_expr);
t = t->next;
}
}

7
gcc/function.h
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@ -46,6 +46,7 @@ struct sequence_stack
{
/* First and last insns in the chain of the saved sequence. */
rtx first, last;
tree sequence_rtl_expr;
struct sequence_stack *next;
};
@ -76,6 +77,11 @@ struct emit_status
rtx x_first_insn;
rtx x_last_insn;
/* RTL_EXPR within which the current sequence will be placed. Use to
prevent reuse of any temporaries within the sequence until after the
RTL_EXPR is emitted. */
tree sequence_rtl_expr;
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
The main insn-chain is saved in the last element of the chain,
@ -111,6 +117,7 @@ struct emit_status
/* For backward compatibility... eventually these should all go away. */
#define reg_rtx_no (cfun->emit->x_reg_rtx_no)
#define seq_rtl_expr (cfun->emit->sequence_rtl_expr)
#define regno_reg_rtx (cfun->emit->x_regno_reg_rtx)
#define seq_stack (cfun->emit->sequence_stack)

1
gcc/rtl.h
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@ -1508,6 +1508,7 @@ extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
extern int prologue_epilogue_contains PARAMS ((rtx));
extern HOST_WIDE_INT get_frame_size PARAMS ((void));
extern void preserve_rtl_expr_result PARAMS ((rtx));
extern void mark_temp_addr_taken PARAMS ((rtx));
extern void update_temp_slot_address PARAMS ((rtx, rtx));
extern void purge_addressof PARAMS ((rtx));

2
gcc/stmt.c
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@ -2025,7 +2025,7 @@ expand_start_stmt_expr ()
t = make_node (RTL_EXPR);
resume_momentary (momentary);
do_pending_stack_adjust ();
start_sequence ();
start_sequence_for_rtl_expr (t);
NO_DEFER_POP;
expr_stmts_for_value++;
return t;

2
gcc/tree.h
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@ -2452,6 +2452,7 @@ extern void preserve_temp_slots PARAMS ((struct rtx_def *));
extern int aggregate_value_p PARAMS ((tree));
extern tree reorder_blocks PARAMS ((tree,
struct rtx_def *));
extern void free_temps_for_rtl_expr PARAMS ((tree));
extern void instantiate_virtual_regs PARAMS ((tree, struct rtx_def *));
extern void unshare_all_rtl PARAMS ((tree, struct rtx_def *));
extern int max_parm_reg_num PARAMS ((void));
@ -2485,6 +2486,7 @@ extern struct rtx_def *store_expr PARAMS ((tree, struct rtx_def *,
extern void check_max_integer_computation_mode PARAMS ((tree));
/* In emit-rtl.c */
extern void start_sequence_for_rtl_expr PARAMS ((tree));
extern struct rtx_def *emit_line_note_after PARAMS ((char *, int,
struct rtx_def *));
extern struct rtx_def *emit_line_note PARAMS ((char *, int));