mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2024-12-24 06:09:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

ssa-dce.c (note_inherently_necessary_set): Add unused attribute.

Browse Source 
* ssa-dce.c (note_inherently_necessary_set): Add unused attribute.
        (find_inherently_necessary): Remove unused variable.

From-SVN: r43690
This commit is contained in:
Andreas Jaeger 2001-07-02 16:46:12 +02:00 committed by Andreas Jaeger
parent dfb5868dcf
commit 766890e16d
2 changed files with 17 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2001-07-02 Andreas Jaeger <aj@suse.de>
* ssa-dce.c (note_inherently_necessary_set): Add unused attribute.
(find_inherently_necessary): Remove unused variable.
2001-07-02 Nathan Sidwell <nathan@codesourcery.com>
* c-common.h (TDI_inlined): New ast dump phase.

25
gcc/ssa-dce.c
View File

@ -1,5 +1,5 @@
/* Dead-code elimination pass for the GNU compiler.
Copyright (C) 2000 Free Software Foundation, Inc.
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
Written by Jeffrey D. Oldham <oldham@codesourcery.com>.
This file is part of GNU CC.
@ -36,7 +36,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
The last step can require adding labels, deleting insns, and
modifying basic block structures. Some conditional jumps may be
converted to unconditional jumps so the control-flow graph may be
out-of-date.
out-of-date.
Edges from some infinite loops to the exit block can be added to
the control-flow graph, but will be removed after this pass is
@ -245,9 +245,9 @@ find_control_dependence (el, edge_index, pdom, cdbte)
if (INDEX_EDGE_PRED_BB (el, edge_index) == EXIT_BLOCK_PTR)
abort ();
ending_block =
(INDEX_EDGE_PRED_BB (el, edge_index) == ENTRY_BLOCK_PTR)
? BASIC_BLOCK (0)
ending_block =
(INDEX_EDGE_PRED_BB (el, edge_index) == ENTRY_BLOCK_PTR)
? BASIC_BLOCK (0)
: find_pdom (pdom, INDEX_EDGE_PRED_BB (el, edge_index));
for (current_block = INDEX_EDGE_SUCC_BB (el, edge_index);
@ -303,7 +303,7 @@ inherently_necessary_register_1 (current_rtx, data)
{
case CLOBBER:
/* Do not traverse the rest of the clobber. */
return -1;
return -1;
break;
case PC:
return 0;
@ -333,11 +333,11 @@ inherently_necessary_register (current_rtx)
/* Called via note_stores for each store in an insn. Note whether
or not a particular store is inherently necessary. Store a
nonzero value in inherently_necessary_p if such a storeis found. */
nonzero value in inherently_necessary_p if such a store is found. */
static void
note_inherently_necessary_set (dest, set, data)
rtx set;
rtx set ATTRIBUTE_UNUSED;
rtx dest;
void *data;
{
@ -364,14 +364,13 @@ static int
find_inherently_necessary (x)
rtx x;
{
rtx pattern;
if (x == NULL_RTX)
return 0;
else if (inherently_necessary_register (x))
return !0;
else
switch (GET_CODE (x))
{
{
case CALL_INSN:
return !0;
case CODE_LABEL:
@ -642,7 +641,7 @@ ssa_eliminate_dead_code ()
{
rtx lbl = find_block_label (BASIC_BLOCK (pdom_block_number));
rtx new_jump = emit_jump_insn_before (gen_jump (lbl), insn);
/* Let jump know that label is in use. */
JUMP_LABEL (new_jump) = lbl;
++LABEL_NUSES (lbl);
@ -667,7 +666,7 @@ ssa_eliminate_dead_code ()
else if (!JUMP_P (insn))
delete_insn_bb (insn);
});
/* Remove fake edges from the CFG. */
remove_fake_edges ();