mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-27 20:29:41 +02:00
a319660afc
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31255 3c298f89-4303-0410-b956-a3cf2f4a3e73
242 lines
6.5 KiB
Diff
242 lines
6.5 KiB
Diff
--- a/gcc/tree-ssa-tail-merge.c (revision 185028)
|
|
+++ b/gcc/tree-ssa-tail-merge.c (working copy)
|
|
@@ -1033,7 +1033,7 @@ set_cluster (basic_block bb1, basic_bloc
|
|
gimple_bb (s2) are members of SAME_SUCC. */
|
|
|
|
static bool
|
|
-gimple_equal_p (same_succ same_succ, gimple s1, gimple s2)
|
|
+gimple_equal_p (same_succ same_succ, gimple s1, gimple s2, bool *gvn_used)
|
|
{
|
|
unsigned int i;
|
|
tree lhs1, lhs2;
|
|
@@ -1069,7 +1069,10 @@ gimple_equal_p (same_succ same_succ, gim
|
|
if (operand_equal_p (t1, t2, 0))
|
|
continue;
|
|
if (gvn_uses_equal (t1, t2))
|
|
- continue;
|
|
+ {
|
|
+ *gvn_used = true;
|
|
+ continue;
|
|
+ }
|
|
equal = false;
|
|
break;
|
|
}
|
|
@@ -1083,12 +1086,16 @@ gimple_equal_p (same_succ same_succ, gim
|
|
if (lhs1 == NULL_TREE || lhs2 == NULL_TREE)
|
|
return false;
|
|
if (TREE_CODE (lhs1) == SSA_NAME && TREE_CODE (lhs2) == SSA_NAME)
|
|
- return vn_valueize (lhs1) == vn_valueize (lhs2);
|
|
+ {
|
|
+ *gvn_used = true;
|
|
+ return vn_valueize (lhs1) == vn_valueize (lhs2);
|
|
+ }
|
|
return operand_equal_p (lhs1, lhs2, 0);
|
|
|
|
case GIMPLE_ASSIGN:
|
|
lhs1 = gimple_get_lhs (s1);
|
|
lhs2 = gimple_get_lhs (s2);
|
|
+ *gvn_used = true;
|
|
return (TREE_CODE (lhs1) == SSA_NAME
|
|
&& TREE_CODE (lhs2) == SSA_NAME
|
|
&& vn_valueize (lhs1) == vn_valueize (lhs2));
|
|
@@ -1096,15 +1103,23 @@ gimple_equal_p (same_succ same_succ, gim
|
|
case GIMPLE_COND:
|
|
t1 = gimple_cond_lhs (s1);
|
|
t2 = gimple_cond_lhs (s2);
|
|
- if (!operand_equal_p (t1, t2, 0)
|
|
- && !gvn_uses_equal (t1, t2))
|
|
- return false;
|
|
+ if (!operand_equal_p (t1, t2, 0))
|
|
+ {
|
|
+ if (gvn_uses_equal (t1, t2))
|
|
+ *gvn_used = true;
|
|
+ else
|
|
+ return false;
|
|
+ }
|
|
|
|
t1 = gimple_cond_rhs (s1);
|
|
t2 = gimple_cond_rhs (s2);
|
|
- if (!operand_equal_p (t1, t2, 0)
|
|
- && !gvn_uses_equal (t1, t2))
|
|
- return false;
|
|
+ if (!operand_equal_p (t1, t2, 0))
|
|
+ {
|
|
+ if (gvn_uses_equal (t1, t2))
|
|
+ *gvn_used = true;
|
|
+ else
|
|
+ return false;
|
|
+ }
|
|
|
|
code1 = gimple_expr_code (s1);
|
|
code2 = gimple_expr_code (s2);
|
|
@@ -1126,18 +1141,25 @@ gimple_equal_p (same_succ same_succ, gim
|
|
/* Let GSI skip backwards over local defs. */
|
|
|
|
static void
|
|
-gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi)
|
|
+gsi_advance_bw_nondebug_nonlocal (gimple_stmt_iterator *gsi, tree *vuse)
|
|
{
|
|
gimple stmt;
|
|
+ tree lvuse;
|
|
|
|
while (true)
|
|
{
|
|
if (gsi_end_p (*gsi))
|
|
return;
|
|
stmt = gsi_stmt (*gsi);
|
|
+
|
|
+ lvuse = gimple_vuse (stmt);
|
|
+ if (lvuse != NULL_TREE)
|
|
+ *vuse = lvuse;
|
|
+
|
|
if (!(is_gimple_assign (stmt) && local_def (gimple_get_lhs (stmt))
|
|
&& !gimple_has_side_effects (stmt)))
|
|
return;
|
|
+
|
|
gsi_prev_nondebug (gsi);
|
|
}
|
|
}
|
|
@@ -1146,28 +1168,34 @@ gsi_advance_bw_nondebug_nonlocal (gimple
|
|
clusters them. */
|
|
|
|
static void
|
|
-find_duplicate (same_succ same_succ, basic_block bb1, basic_block bb2)
|
|
+find_duplicate (same_succ same_succ, basic_block bb1, basic_block bb2,
|
|
+ bool gvn_used)
|
|
{
|
|
gimple_stmt_iterator gsi1 = gsi_last_nondebug_bb (bb1);
|
|
gimple_stmt_iterator gsi2 = gsi_last_nondebug_bb (bb2);
|
|
+ tree vuse1 = NULL_TREE, vuse2 = NULL_TREE;
|
|
|
|
- gsi_advance_bw_nondebug_nonlocal (&gsi1);
|
|
- gsi_advance_bw_nondebug_nonlocal (&gsi2);
|
|
+ gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1);
|
|
+ gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2);
|
|
|
|
while (!gsi_end_p (gsi1) && !gsi_end_p (gsi2))
|
|
{
|
|
- if (!gimple_equal_p (same_succ, gsi_stmt (gsi1), gsi_stmt (gsi2)))
|
|
+ if (!gimple_equal_p (same_succ, gsi_stmt (gsi1), gsi_stmt (gsi2),
|
|
+ &gvn_used))
|
|
return;
|
|
|
|
gsi_prev_nondebug (&gsi1);
|
|
gsi_prev_nondebug (&gsi2);
|
|
- gsi_advance_bw_nondebug_nonlocal (&gsi1);
|
|
- gsi_advance_bw_nondebug_nonlocal (&gsi2);
|
|
+ gsi_advance_bw_nondebug_nonlocal (&gsi1, &vuse1);
|
|
+ gsi_advance_bw_nondebug_nonlocal (&gsi2, &vuse2);
|
|
}
|
|
|
|
if (!(gsi_end_p (gsi1) && gsi_end_p (gsi2)))
|
|
return;
|
|
|
|
+ if (gvn_used && vuse1 != vuse2)
|
|
+ return;
|
|
+
|
|
if (dump_file)
|
|
fprintf (dump_file, "find_duplicates: <bb %d> duplicate of <bb %d>\n",
|
|
bb1->index, bb2->index);
|
|
@@ -1179,7 +1207,7 @@ find_duplicate (same_succ same_succ, bas
|
|
E2 are equal. */
|
|
|
|
static bool
|
|
-same_phi_alternatives_1 (basic_block dest, edge e1, edge e2)
|
|
+same_phi_alternatives_1 (basic_block dest, edge e1, edge e2, bool *gvn_used)
|
|
{
|
|
int n1 = e1->dest_idx, n2 = e2->dest_idx;
|
|
gimple_stmt_iterator gsi;
|
|
@@ -1197,7 +1225,10 @@ same_phi_alternatives_1 (basic_block des
|
|
if (operand_equal_for_phi_arg_p (val1, val2))
|
|
continue;
|
|
if (gvn_uses_equal (val1, val2))
|
|
- continue;
|
|
+ {
|
|
+ *gvn_used = true;
|
|
+ continue;
|
|
+ }
|
|
|
|
return false;
|
|
}
|
|
@@ -1209,7 +1240,8 @@ same_phi_alternatives_1 (basic_block des
|
|
phi alternatives for BB1 and BB2 are equal. */
|
|
|
|
static bool
|
|
-same_phi_alternatives (same_succ same_succ, basic_block bb1, basic_block bb2)
|
|
+same_phi_alternatives (same_succ same_succ, basic_block bb1, basic_block bb2,
|
|
+ bool *gvn_used)
|
|
{
|
|
unsigned int s;
|
|
bitmap_iterator bs;
|
|
@@ -1227,7 +1259,7 @@ same_phi_alternatives (same_succ same_su
|
|
|
|
/* For all phis in bb, the phi alternatives for e1 and e2 need to have
|
|
the same value. */
|
|
- if (!same_phi_alternatives_1 (succ, e1, e2))
|
|
+ if (!same_phi_alternatives_1 (succ, e1, e2, gvn_used))
|
|
return false;
|
|
}
|
|
|
|
@@ -1301,6 +1333,7 @@ find_clusters_1 (same_succ same_succ)
|
|
bitmap_iterator bi, bj;
|
|
int nr_comparisons;
|
|
int max_comparisons = PARAM_VALUE (PARAM_MAX_TAIL_MERGE_COMPARISONS);
|
|
+ bool gvn_used;
|
|
|
|
EXECUTE_IF_SET_IN_BITMAP (same_succ->bbs, 0, i, bi)
|
|
{
|
|
@@ -1333,10 +1366,11 @@ find_clusters_1 (same_succ same_succ)
|
|
if (!deps_ok_for_redirect (bb1, bb2))
|
|
continue;
|
|
|
|
- if (!(same_phi_alternatives (same_succ, bb1, bb2)))
|
|
+ gvn_used = false;
|
|
+ if (!(same_phi_alternatives (same_succ, bb1, bb2, &gvn_used)))
|
|
continue;
|
|
|
|
- find_duplicate (same_succ, bb1, bb2);
|
|
+ find_duplicate (same_succ, bb1, bb2, gvn_used);
|
|
}
|
|
}
|
|
}
|
|
Index: gcc/testsuite/gcc.dg/pr52734.c
|
|
===================================================================
|
|
--- /dev/null (new file)
|
|
+++ gcc/testsuite/gcc.dg/pr52734.c (revision 0)
|
|
@@ -0,0 +1,35 @@
|
|
+/* { dg-do run } */
|
|
+/* { dg-options "-O2" } */
|
|
+
|
|
+int bbb = 0;
|
|
+
|
|
+int __attribute__((noinline,noclone)) aaa(void)
|
|
+{
|
|
+ ++bbb;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+int __attribute__((noinline,noclone)) ccc(void)
|
|
+{
|
|
+ int ddd;
|
|
+ /* bbb == 0 */
|
|
+ if (aaa())
|
|
+ return bbb;
|
|
+
|
|
+ /* bbb == 1 */
|
|
+ ddd = bbb;
|
|
+ /* bbb == ddd == 1 */
|
|
+ if (aaa ())
|
|
+ return 0;
|
|
+ /* bbb == 2, ddd == 1 */
|
|
+
|
|
+ return ddd;
|
|
+}
|
|
+
|
|
+int main(void)
|
|
+{
|
|
+ if (ccc() != 1)
|
|
+ __builtin_abort();
|
|
+ return 0;
|
|
+}
|
|
+
|