mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-03-10 01:07:08 +08:00
Code Issues Packages Projects Releases Wiki Activity

emit-rtl.c (unshare_all_rtl): Unshare virtual parameters too.

Browse Source 
* emit-rtl.c (unshare_all_rtl): Unshare virtual parameters too.
Use unshare_all_rtl_1.
(unshare_all_rtl_again): New function.
(unshare_all_rtl_1): New function split out of unshare_all_rtl.

* function.c (purge_addressof_1): Use unshare_all_rtl_again
rather than resetting the 'used' flags ourself.

* toplev.c (rest_of_compilation): Add current_function_decl
to the unshare_all_rtl call.
* tree.h: Prototype unshare_all_rtl.
* rtl.h: Prototype unshare_all_rtl_again here.

From-SVN: r31651
This commit is contained in:
Geoff Keating 2000-01-27 20:46:26 +00:00 committed by Geoffrey Keating
parent 3bc9f12b33
commit d1b8177961
6 changed files with 71 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
gcc/ChangeLog
View File

@ -1,4 +1,19 @@
2000-01-24 Geoffrey Keating <geoffk@cygnus.com>
2000-01-27 Geoffrey Keating <geoffk@cygnus.com>
* emit-rtl.c (unshare_all_rtl): Unshare virtual parameters too.
Use unshare_all_rtl_1.
(unshare_all_rtl_again): New function.
(unshare_all_rtl_1): New function split out of unshare_all_rtl.
* function.c (purge_addressof_1): Use unshare_all_rtl_again
rather than resetting the 'used' flags ourself.
* toplev.c (rest_of_compilation): Add current_function_decl
to the unshare_all_rtl call.
* tree.h: Prototype unshare_all_rtl.
* rtl.h: Prototype unshare_all_rtl_again here.
2000-01-27 Geoffrey Keating <geoffk@cygnus.com>
* genoutput.c (output_prologue): Include ggc.h in generated
files.

65
gcc/emit-rtl.c
View File

@ -170,6 +170,7 @@ static rtx make_jump_insn_raw PARAMS ((rtx));
static rtx make_call_insn_raw PARAMS ((rtx));
static rtx find_line_note PARAMS ((rtx));
static void mark_sequence_stack PARAMS ((struct sequence_stack *));
static void unshare_all_rtl_1 PARAMS ((rtx));
/* There are some RTL codes that require special attention; the generation
functions do the raw handling. If you add to this list, modify
@ -1610,23 +1611,25 @@ free_emit_status (f)
f->emit = NULL;
}
/* Go through all the RTL insn bodies and copy any invalid shared structure.
It does not work to do this twice, because the mark bits set here
are not cleared afterwards. */
/* Go through all the RTL insn bodies and copy any invalid shared
structure. This routine should only be called once. */
void
unshare_all_rtl (insn)
register rtx insn;
unshare_all_rtl (fndecl, insn)
tree fndecl;
rtx insn;
{
for (; insn; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == INSN || GET_CODE (insn) == JUMP_INSN
|| GET_CODE (insn) == CALL_INSN)
{
PATTERN (insn) = copy_rtx_if_shared (PATTERN (insn));
REG_NOTES (insn) = copy_rtx_if_shared (REG_NOTES (insn));
LOG_LINKS (insn) = copy_rtx_if_shared (LOG_LINKS (insn));
}
tree decl;
/* Make sure that virtual parameters are not shared. */
for (decl = DECL_ARGUMENTS (fndecl); decl; decl = TREE_CHAIN (decl))
{
copy_rtx_if_shared (DECL_RTL (decl));
}
/* Unshare just about everything else. */
unshare_all_rtl_1 (insn);
/* Make sure the addresses of stack slots found outside the insn chain
(such as, in DECL_RTL of a variable) are not shared
with the insn chain.
@ -1634,10 +1637,44 @@ unshare_all_rtl (insn)
This special care is necessary when the stack slot MEM does not
actually appear in the insn chain. If it does appear, its address
is unshared from all else at that point. */
copy_rtx_if_shared (stack_slot_list);
}
/* Go through all the RTL insn bodies and copy any invalid shared
structure, again. This is a fairly expensive thing to do so it
should be done sparingly. */
void
unshare_all_rtl_again (insn)
rtx insn;
{
rtx p;
for (p = insn; p; p = NEXT_INSN (p))
if (GET_RTX_CLASS (GET_CODE (p)) == 'i')
{
reset_used_flags (PATTERN (p));
reset_used_flags (REG_NOTES (p));
reset_used_flags (LOG_LINKS (p));
}
unshare_all_rtl_1 (insn);
}
/* Go through all the RTL insn bodies and copy any invalid shared structure.
Assumes the mark bits are cleared at entry. */
static void
unshare_all_rtl_1 (insn)
rtx insn;
{
for (; insn; insn = NEXT_INSN (insn))
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
{
PATTERN (insn) = copy_rtx_if_shared (PATTERN (insn));
REG_NOTES (insn) = copy_rtx_if_shared (REG_NOTES (insn));
LOG_LINKS (insn) = copy_rtx_if_shared (LOG_LINKS (insn));
}
}
/* Mark ORIG as in use, and return a copy of it if it was already in use.
Recursively does the same for subexpressions. */

8
gcc/function.c
View File

@ -2972,13 +2972,7 @@ purge_addressof_1 (loc, insn, force, store, ht)
/* Make sure to unshare any shared rtl that store_bit_field
might have created. */
for (p = get_insns(); p; p = NEXT_INSN (p))
{
reset_used_flags (PATTERN (p));
reset_used_flags (REG_NOTES (p));
reset_used_flags (LOG_LINKS (p));
}
unshare_all_rtl (get_insns ());
unshare_all_rtl_again (get_insns ());
seq = gen_sequence ();
end_sequence ();

2
gcc/rtl.h
View File

@ -1445,7 +1445,7 @@ extern void reverse_comparison PARAMS ((rtx));
extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
extern void set_new_first_and_last_label_num PARAMS ((int, int));
extern void set_new_last_label_num PARAMS ((int));
extern void unshare_all_rtl PARAMS ((rtx));
extern void unshare_all_rtl_again PARAMS ((rtx));
extern void set_last_insn PARAMS ((rtx));
extern void link_cc0_insns PARAMS ((rtx));
extern void add_insn PARAMS ((rtx));

2
gcc/toplev.c
View File

@ -2944,7 +2944,7 @@ rest_of_compilation (decl)
/* Copy any shared structure that should not be shared. */
unshare_all_rtl (insns);
unshare_all_rtl (current_function_decl, insns);
init_EXPR_INSN_LIST_cache ();

1
gcc/tree.h
View File

@ -2392,6 +2392,7 @@ 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));
extern void push_function_context PARAMS ((void));
extern void pop_function_context PARAMS ((void));